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  • Weitere Quellen  (866)
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  • 1981  (866)
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  • 1
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    Regional relationships among earthquake magnitude scales (1981)
    In:  Rev. Geophys. Space Phys., Taipei, Elsevier, vol. 19, no. B2, pp. 649-663, pp. B02317, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Scaling ; Magnitude ; Nuclear explosion
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 2
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    Three-dimensional spontaneous rupture propagation and implications for the earthquake source mechanism (1981)
    In:  Geophys. J. R. astr. Soc., Warszawa, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 67, no. 36, pp. 375-393, pp. B05310, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Source ; Seismology ; Fracture ; GJRaS
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 3
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    Theory of time-dependent rupture in the earth (1981)
    In:  J. Geophys. Res., Warszawa, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 86, no. 36, pp. 6039-6051, pp. B05310, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Friction ; Fracture ; Rock mechanics ; Seismology ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 4
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    Preliminary reference earth model (1981)
    In:  Phys. Earth Planet. Inter., Luxembourg, U.S. Geological Survey, vol. 25, no. 24, pp. 297-356, pp. B05309, (ISBN 0-471-26610-8)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earth model, also for more shallow analyses ! ; PREM ; PEPI ; Dziewonski
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 5
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    Contributions to the knowledge of the geometrical and physical parameters of the Vrancea earthquake foci (1981)
    In:  Rev. Roum. Géol., Géophys. et Géogr. - Géophysique, Münster, 3, vol. 25, no. 3-4, pp. 17-34, pp. L12311, (ISBN 0-471-26610-8)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Earthquake ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe) ; Fault plane solution, focal mechanism
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 6
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    The character of high-frequency strong ground motion (1981)
    In:  Bull. Seism. Soc. Am., Luxembourg, Conseil de l'Europe, vol. 71, no. 7055, pp. 2071-2095, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Strong motions ; Spectrum ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 7
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    Hybrid ray-mode formulation of SH motion in a two-layer half-space (1981)
    In:  Bull. seism. Soc. Am., Helsinki, Icelandic Meteorological Office, Ministry for the Environment University of Iceland, vol. 71, no. 2, pp. 1763-1781, pp. 2265, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): SH waves ; Layers ; Seismology ; NOModelling ; Synthetic seismograms ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 8
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    Monitoring an underground repository with modern seismological methods (1981)
    In:  Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., San Francisco, Pergamon, vol. 18, no. 8, pp. 517-527, pp. 1121, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Energy (of earthquakes) ; nuclear ; waste ; disposal
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 9
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    Unbekannt
    Analysis of peak ground motion in terms of a model of inhomogeneous faulting (1981)
    In:  J. Geophys. Res., New York, August, vol. 86, no. 3-4, pp. 3901-3912, pp. 1610, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Strong motions ; Seismology ; Inhomogeneity ; Fracture ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 10
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    Mantle P-wave velocity structure beneath Antarctica (1981)
    In:  Bull. Seism. Soc. Am., New York, August, vol. 71, no. 3-4, pp. 1061-1074, pp. B05S05, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): earth mantle ; Seismology ; P-waves ; residues ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 11
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    Peak horizontal accelerations and velocity from strong-motion records including records from the 1979 Imperial Valley, California, earthquake (1981)
    In:  Bull. Seism. Soc. Am., (submitted), Icelandic Meteorological Office, Ministry for the Environment University of Iceland, vol. 71, no. 1-2, pp. 2011-2038, pp. TC1011, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Strong motions ; Earthquake ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 12
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    Three-dimensional expression of seismic particle motions by the trajectory ellipsoid and its application to the seismic data observed in the Kanto district, Japan (1981)
    In:  J. Phys. Earth, Bonn, 3-4, vol. 29, no. 1, pp. 221-239, pp. B01401, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Beschreibung: Ellipsoid-Least-Squares-Fit
    Schlagwort(e): Seismology ; Polarization ; Three component data ; JPE
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 13
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    Length of rupture from the Swabian Alb event on 3. September 1978. Derived from the Pn duration at GRF (1981)
    In:  Geol. Jb., Würzburg, Physica-Verlag, vol. E21, no. 1, pp. 13-25, pp. L24313, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): P-waves ; Fracture ; Fracture time (duration) ; Earthquake ; Seismology ; Seismic arrays
    Standort Signatur Erwartet Verfügbarkeit
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  • 14
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    Source inversion of seismic waveforms: The Koyna, India, earthquakes of 13 September 1967 (1981)
    In:  Bull. Seism. Soc. Am., Basel, Elsevier Science Publishers, vol. 71, no. 8, pp. 1-24, pp. L15S20, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earthquake ; Inversion ; Source parameters ; BSSA
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  • 15
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    A stochastic fault model. 2. Time-dependent case (1981)
    In:  J. Geophys. Res., Luxembourg, EGS-Gauthier-Villars, vol. 86, no. 1-4, pp. 10821-10834, pp. L23608
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Source parameters ; Statistical investigations ; Fault zone ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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  • 16
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    Seismogram synthesis using normal mode superposition: The locked mode approximation (1981)
    In:  Geophys. J. R. astr. Soc., Münster, 3, vol. 66, no. 2, pp. 37-69, pp. L23301, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): NOModelling ; Layers ; Seismology ; Synthetic seismograms ; GJRaS
    Standort Signatur Erwartet Verfügbarkeit
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  • 17
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    Depth resolution of earthquakes in central Asia by moment tensor inversion of long-period Rayleigh waves: Effects of phase velocity variations across Eurasia and their calibration (1981)
    In:  J. Geophys. Res., Oslo, Wiley, vol. 86, no. 2, pp. 5963-5984, pp. L02304, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Moment tensor ; Inversion ; Seismicity ; Rayleigh waves ; Phase velocity ; Hypocentral depth ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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  • 18
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    Data-adaptive polarization filters for multichannel geophysical data (1981)
    In:  Geophysics, Basel, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 46, no. 3, pp. 1423-1431, pp. 1009, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Seismics (controlled source seismology) ; Filter- ; Polarization
    Standort Signatur Erwartet Verfügbarkeit
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  • 19
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    Characteristic earthquakes on intraplate normal faults (1981)
    In:  Earthquake Notes, Luxembourg, Conseil de l'Europe, vol. 51, no. 3, pp. 71, pp. 1006, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earthquake ; Source
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 20
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    The 1886 Charleston, South Carolina earthquake and the Appalachian detachment (1981)
    In:  J. Geophys. Res., Luxembourg, Conseil de l'Europe, vol. 86, no. 1-4, pp. 7874-7894, pp. 1006, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Earthquake ; Seismology ; Geol. aspects ; Tectonics ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 21
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    Detection probabilities for earthquakes in Sweden (1981)
    In:  J. Geophys., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 49, no. 2, pp. 243-244, pp. 8045, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismicity ; Seismology ; Detectors ; Kulhanek ; Wahlstroem ; Wahlstrom
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 22
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    An automatic measurement of arrival time of seismic waves and its application to an on-line processing system (1981)
    In:  Bull. Earthq. Res. Inst., Corvallis, x + 406 pp., Oregon State University Press, vol. 55, no. 1-4, pp. 449-484, pp. L13610, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Travel time ; Data analysis / ~ processing
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 23
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    Conversion phases from mantle transition zones. Identification of seismic sources - earthquake or underground explosion (1981)
    D. Reidel Publ. Comp.
    In:  London, D. Reidel Publ. Comp., vol. special paper 359, ix + 190 pp., no. 2, pp. 497-504, (ISBN 0-8137-2359-0)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Discrimination ; Seismology ; ConvolutionR ; Source ; Nuclear explosion
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 24
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    Principles and Applications of Microearthquake Networks (1981)
    Academic Press
    In:  New York, 293 pp., Academic Press, vol. 34, no. 22, pp. 65-70, (ISBN 0-691-12183-4, 2005 (481 pp. + CD-ROM))
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismic networks ; Handbook of geophysics ; Seismology
    Standort Signatur Erwartet Verfügbarkeit
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  • 25
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    Focal mechanism solutions and their tectonic implications for the eastern Alpine-Himalayan region (1981)
    Am. Geophys. Un.
    In:  Professional Paper, Zagros, Hindu Kush, Himalaya: Geodynamic Evolution, Washington, D. C., Am. Geophys. Un., vol. 65, no. 16, pp. 243-271, (ISBN 1-86239-165-3, vi + 330 pp.)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Fault plane solution, focal mechanism ; Tectonics ; Plate tectonics ; Seismology
    Standort Signatur Erwartet Verfügbarkeit
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  • 26
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    Earthquake magnitude - Recent research and current trends (1981)
    In:  Earth-Sci. Rev., Ottawa, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 17, no. 3-4, pp. 315-398, pp. L14310
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Magnitude ; Seismology ; Review article ; Bath
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  • 27
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    Crustal structures in China from surface waves (1981)
    In:  Acta Seismologica Sinica, Tokyo, Terra Scientific Publishing Company, vol. 3, no. 1-3, pp. 335-350, pp. B05S09, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Surface waves ; CRUST ; China ; Seismology ; Seismics (controlled source seismology)
    Standort Signatur Erwartet Verfügbarkeit
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  • 28
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    Focal depths and moment tensor representations of shallow earthquakes associated with the great Sumba earthquake (1981)
    In:  J. Geophys. Res., Tokyo, Terra Scientific Publishing Company, vol. 86, no. 8, pp. 9357-9374, pp. B05S21, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Moment tensor ; Source parameters ; Earthquake ; Hypocentral depth ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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  • 29
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    An automatic seismic signal detection algorithm based on the Walsh transform (1981)
    In:  Bull. Seism. Soc. Am., Bonn, Pergamon, vol. 71, no. 4, pp. 1351-1360, pp. 2050, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Detectors ; sta ; Transformations ; squ ; median ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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  • 30
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    Magnitudes of large shallow earthquakes from 1904 to 1980 (1981)
    In:  Phys. Earth Plan. Int., vol. 27, no. 1-4, pp. 72-92
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Magnitude ; Seismology ; Earthquake catalog ; PEPI
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  • 31
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    Crustal Q structure in the United States from multi-mode surface waves (1981)
    In:  Bull. seism. Soc. Am., Taipei, Elsevier, vol. 71, no. 2, pp. 161-181, pp. B09401, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Attenuation ; Surface waves ; NOModelling ; CRUST ; Seismology ; Quality factor ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 32
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    Determination of source parameters from seismograms of mining tremors and the inverse problem for a seismic source (1981)
    Polish Academy of Sciences
    In:  Publications of the Institute of Geophysics, Warszawa, Polish Academy of Sciences, vol. A-11(147), no. 18, pp. 16-1 to 16-4, pp. 1869, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Source parameters ; Inversion ; Induced seismicity ; Mining geophysics
    Standort Signatur Erwartet Verfügbarkeit
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  • 33
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    Determination of earthquake source parameters from waveform data for studies of global and regional seismicity (1981)
    In:  J. Geophys. Res., Luxembourg, U.S. Geological Survey, vol. 86, no. 3-4, pp. 2825-2852, pp. B05309, (ISBN 0-471-26610-8)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Source parameters ; Seismology ; Source ; Seismicity ; Wave form analysis ; JGR ; Dziewonski
    Standort Signatur Erwartet Verfügbarkeit
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  • 34
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    Fundamental spheroidal mode observations of aspherical heterogeneity (1981)
    In:  Geophys. J. R. astr. Soc., Dordrecht, National Academy of Sciences of the USA, vol. 64, no. 5-6, pp. 605-634, pp. TC5003, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): NOModelling ; Inhomogeneity ; Seismology ; GJRaS
    Standort Signatur Erwartet Verfügbarkeit
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  • 35
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    A broadband study of the 13 August 1978 Santa Barbara earthquake (1981)
    In:  Bull. Seism. Soc. Am., Washington, D.C., AGU, vol. 71, no. B12, pp. 1701-1718, pp. B12406, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Broad-band ; Earthquake ; BSSA
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  • 36
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    Seismic Waves and Sources (1981)
    Springer
    In:  New York, 1108 pp., Springer, vol. 96, pp. 225, (ISBN 0-471-95596-5)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): FROTH ; RUB ; GMG ; 3.15.80 ; Textbook of geophysics ; Seismology ; Waves ; Wavelet processing ; SModelling ; Dislocation ; Elasticity theory of dislocations ; Source
    Standort Signatur Erwartet Verfügbarkeit
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  • 37
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    Identification of Seismic Sources - Earthquake or Underground Explosion (1981)
    Reidel
    In:  Amsterdam, Reidel, vol. 65, no. XVI:, pp. 1-14, (ISBN 0-521-80380-2 (hb), 0521-00859-X (pb))
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Nuclear explosion ; Seismology ; Discrimination ; Source
    Standort Signatur Erwartet Verfügbarkeit
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  • 38
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    Earthquake Mechanics (1981)
    Cambridge Univ. Press
    In:  Cambridge, XIII+248 pp., Cambridge Univ. Press, vol. 7, no. XVI:, pp. 227-235, (ISBN 0231-12739-1 hb, 0231127383 pb)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earthquake ; Textbook of geophysics
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  • 39
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    Earthquake Prediction (1981)
    AGU
    In:  Washington, D.C., AGU, vol. 4, no. Publ. No. 12, pp. 9, (3-540-24165-5, XXVI + 228 p.)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Handbook of geophysics ; Earthquake precursor: prediction research ; Earthquake precursor: deformation or strain ; Seismicity ; Seismology
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  • 40
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    A study of crustal and upper mantle structure of Northwestern Turkey (1981)
    In:  Geophys. Res. Lett., Tokyo, Railway Tech. Res. Inst., vol. 8, no. 12, pp. 33-35, pp. B06403, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Seismics (controlled source seismology) ; CRUST ; earth mantle ; Travel time ; GRL ; Necioglu
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  • 41
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    International Symposium on the Analysis of Seismicity and Seismic Hazard and Seismic Risk, 18. - 23. May 1981 (1981)
    Czechoslovak Academy of Sciences
    In:  Proceedings, 1., Prag, Czechoslovak Academy of Sciences, vol. 10, no. WS-693 7-83, pp. 235-239, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Seismicity ; Earthquake precursor: prediction research ; Earthquake risk ; Earthquake hazard ; Proceedings of a conference
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  • 42
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    A technique for the inversion of regional data in source parameter studies (1981)
    In:  J. Geophys. Res., Washington, D.C., AGU, vol. 86, no. B12, pp. 1679-1685, pp. B12406, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Source parameters ; Inversion ; JGR
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  • 43
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    Seismic quiescence in the Western Hellenic Arc may foreshadow large earthquakes (1981)
    In:  Nature, Reykjavík, Icelandic Meteorological Office, Ministry for the Environment, University of Iceland, vol. 289, no. 11, pp. 785-787, pp. L05306, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismicity ; Earthquake precursor: statistical anal. of seismicity ; Seismology ; Earthquake precursor: prediction research ; FROTH ; (abstract)
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  • 44
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    Seismic discrimination problems at regional distances (1981)
    D. Reidel Publishing Company
    In:  Professional Paper, Identification of Seismic Sources - Earthquake or Underground Explosion, Berlin, D. Reidel Publishing Company, vol. 24, no. 16, pp. 695-740, (ISBN 0080419208)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Nuclear explosion ; Discrimination
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  • 45
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    Prediction-oriented seismology (1981)
    Reidel
    In:  Bull., Polar Proj. OP-O3A4, Current Research in Earthquake Prediction, Dordrecht, Reidel, vol. I, no. XVI:, pp. 221-300, (ISBN: 3-540-23712-7)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Earthquake precursor: prediction research ; Seismicity ; Seismology ; Earthquake precursor: stresses ; Fault plane solution, focal mechanism
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  • 46
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    Broad-band seismometry - a unified approach towards a kinematic and dynamic interpretation of seismograms (1981)
    In:  Bull., Polar Proj. OP-O3A4, Identification of Seismic Sources - Earthquake or Underground Explosion, Leiden, Noordhoff, vol. 11, no. XVI:, pp. 763-786, (ISBN: 3-540-23712-7)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Broad-band ; Seismic arrays ; Data analysis / ~ processing ; Nuclear explosion ; Review article
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  • 47
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    Phase identification and event location at regional distance using small-aperture array data (1981)
    D. Reidel Publ. Co.
    In:  Bull., Polar Proj. OP-O3A4, Identification of Seismic Sources - Earthquake or Underground Explosion, Moscow, D. Reidel Publ. Co., vol. 65, no. Subvol. a, pp. 467-481, (ISBN 0080419208)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; NOR ; PIC ; f-k-Analysis ; Seismic arrays ; NOISE ; AUD ; Location ; Nuclear explosion
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    BIBLIOGRAFIE SEISMOLOGIE
  • 48
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    Seismological significance of the 1977-1978 eruptions and magma intrusion process of Usu Volcano, Hokkaido (1981)
    In:  J. Volcanol. Geotherm. Res., Kyoto, AGU, vol. 9, no. 6, pp. 311-344, pp. L24617, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earthquake ; Source
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    BIBLIOGRAFIE SEISMOLOGIE
  • 49
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    Richtantenne für Erdbebenwellen (1981)
    In:  Umschau, New York, Scientific American, vol. 81, no. B9, pp. 443, pp. B09309, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismic arrays ; Seismology
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  • 50
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    Results of recent South Carolina seismological studies (1981)
    In:  Bull. Seism. Soc. Am., Kunming, China, AGU, vol. 71, no. 5636, pp. 1883-1902, pp. L14317, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Review article ; Seismicity ; Source parameters ; Seismology ; BSSA
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  • 51
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    Earthquake Interpretations. A Manual For Reading Seismograms (1981)
    William Kaufmann, Inc.
    In:  Los Altos, California, William Kaufmann, Inc., vol. Developments in Petroleum Science vol. 15B, no. Publ. No. 12, pp. 9, (3-540-24165-5, XXVI + 228 p.)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Handbook of geophysics
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  • 52
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    International Symposium on the Analysis of Seismicity and Seismic Hazard and Seismic Risk, 18. - 23. May 1981 (1981)
    Czechoslovak Academy of Sciences
    In:  Proceedings, 2., Prag, Czechoslovak Academy of Sciences, vol. 10, no. WS-693 7-83, pp. 235-239, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Seismicity ; Earthquake precursor: prediction research ; Earthquake risk ; Earthquake hazard ; Proceedings of a conference
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    BIBLIOGRAFIE SEISMOLOGIE
  • 53
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    Untersuchungen zum Bruchvorgang des Rumänischen Erdbebens am 4.3.1977 und Bestimmung des seismischen Moments mit Hilfe von synthetischen Seismogrammen für P-Wellen (1981)
    Geophysikalisches Inst.
    In:  Diplomarbeit, Univ. Karlsruhe, Geophysikalisches Inst., vol. 1034, no. 77-3, pp. 262-277, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; seismic Moment ; Earthquake ; Synthetic seismograms ; Rakers
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  • 54
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    Properties of ambient seismic noise and summary of noise spectrum in the vicinity of RSTN sites (1981)
    Lawrence Livermore National Laboratory
    In:  informal report, Houston, Lawrence Livermore National Laboratory, vol. 339-350, no. UCID-18928, pp. 344, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Nuclear explosion ; NOISE ; Spectrum ; Geol. aspects ; Seismicity
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  • 55
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    Use of stochastic models in seismology (1981)
    In:  Houston, no. 18, pp. 143-179
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Statistical investigations ; Inhomogeneity
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  • 56
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    The anelasticity of the earth's mantle in the European area (1981)
    In:  Tectonophysics, Dordrecht, Martinus Nijhoff Publishers, vol. 72, no. 5705, pp. 181-201, pp. 2389, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Inelastic ; Attenuation ; Elasticity ; earth mantle
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  • 57
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    The Denver earthquakes of 1967-1968 (1981)
    In:  Bull. Seism. Soc. Am., Zagreb, Conseil de l'Europe, vol. 71, no. 4, pp. 731-745, pp. L02307, (ISSN 0343-5164)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earthquake ; Earthquake catalog ; BSSA
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  • 58
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    A numerical study of peak ground motion scaling (1981)
    In:  Bull. Seism. Soc. Am., Zagreb, Conseil de l'Europe, vol. 71, no. 4, pp. 1963-1979, pp. L02307, (ISSN 0343-5164)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Strong motions ; BSSA
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  • 59
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    Amplitudenverlauf von seismischen Kernphasen und der Geschwindigkeits- und Dichtesprung an der Grenze des inneren Kern, mit einem Anhang über die Synthese theoretischer Seismogramme mit Hilfe der schnellen Hankeltransformation (1981)
    Universität Karlsruhe
    In:  Dissertation, Grenoble, Universität Karlsruhe, vol. 10, no. GL-TR-89-0230, pp. 95-134, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; PKP ; earth Core ; Earth model, also for more shallow analyses ! ; Velocity depth profile ; Synthetic seismograms ; Transformations ; Hage
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  • 60
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    Regional phase processors (1981)
    VELA Seismological Center
    In:  report, Arlington, Virginia, VELA Seismological Center, vol. 10, no. VSC-TR-81-19, pp. 484-486, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1981
    Beschreibung: Polar. filter (von Smart, 1977) zur Detektion u Bestimmung des Azimuts, Anwendung auf P und Lg-Phasen in kurz-periodischen Daten der Station RKON. unterschiedlich zitiert bei Christ. und ...
    Schlagwort(e): Seismology ; Data analysis / ~ processing ; Filter- ; Detectors ; Polarization
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  • 61
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    Informationsreise der seismologischen Delegation aus der Bundesrepublik Deutschland in die Volksrepublik China, 1.-25. März 1981 (1981)
    Inst. of Geophys., Univ. Frankfurt
    In:  Reisebericht an die Max-Planck-Gesellschaft, Bad Bergzabern, Inst. of Geophys., Univ. Frankfurt, vol. 10, no. 13, pp. 1-217
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Seismology ; Earthquake precursor: prediction research ; Project report/description
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  • 62
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    EET theoretical design techniques (1981)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: As a part of the EET aerodynamics program an out-of-house program was developed and monitored to provide theoretical procedures useful in the design of transport aircraft. The focus of the effort was to provide tools valid in the nonlinear transonic speed range. The effort was divided into two basic areas, inviscid configuration analysis and design procedures and viscous correction procedures.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Advan. Aerodyn.: Selected NASA Res.; p 79-94
    Format: text
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    F-111 TACT natural laminar flow glove flight results (1981)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Improvements in cruise efficiency on the order of 15 to 40% are obtained by increasing the extent of laminar flow over lifting surfaces. Two methods of achieving laminar flow are being considered, natural laminar flow and laminar flow control. Natural laminar flow (NLF) relies primarily on airfoil shape while laminar flow control involves boundary layer suction or blowing with mechanical devices. The extent of natural laminar flow that could be achieved with consistency in a real flight environment at chord Reynolds numbers in the range of 30 x 10(6) power was evaluated. Nineteen flights were conducted on the F-111 TACT airplane having a NLF airfoil glove section. The section consists of a supercritical airfoil providing favorable pressure gradients over extensive portions of the upper and lower surfaces of the wing. Boundary layer measurements were obtained over a range of wing leading edge sweep angles at Mach numbers from 0.80 to 0.85. Data were obtained for natural transition and for a range of forced transition locations over the test airfoil.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Langley Research Center Advan. Aerodyn.: Selected NASA Res.; p 11-20
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  • 64
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    Effect of heavy rain on aircraft (1981)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: A summary on heavy rain effects on aircraft aerodynamics validation of research and some wind shear accidents in which heavy rain were an important factor. Frost formation and what frost does to the lift and drag curves for an airfoil was examined. If frost could cause severe aerodynamic problems for both general aviation and transport aircraft due to its roughness, then heavy rain produce a similar result. The influencing parameters of heavy rain on an aircraft are studied. Sources of aerodynamic roughness due to rain and wind shear and heavy rain accidents are outlined.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems 76-80 (SEE N82-21139 12-01)
    Format: text
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  • 65
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    Meteorology impact on future aircraft design (1981)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Meteorology impact on future aircraft design is discussed. Upcoming changes in both design and operations that will be influenced by the meteorological environment are outlined. Future and more nonconventional designs and meteorological impact brought about by operational changes over the next few years are examined.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 29-34
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    Meteorological impact on aviation fuel efficiency (1981)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: The connection between fuel consumption and weather data is discussed. Fuel efficient flights creating adequate near real time weather information are examined. The lack of highly resolved real time and near real time wind and temperature data at flight altitudes is investigated. The existing systems, which is based on twice a day balloon observations, supplemented by pilot reports or other occasional data, is not adequate for optimum flight planning. The impacts of upper winds and temperatures on fuel efficiency and flight planning are not widely appreciated and developing new weather products are considered.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 15-19
    Format: text
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  • 67
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    Transport velocity transformation - A convenient method for performance analysis of multilayer solar cell structure (1981)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-18
    Beschreibung: It is noted that in the case of low-level injection, space-charge quasi-neutrality, and spatially constant material parameters (including an electrostatic field), the individual layer can be treated analytically and the basic solar cell performance parameters can be evaluated from three equations. The first equation represents the transformation of the transport velocity across the layer from the other layer boundary. The second establishes the light-generated current output from the layer interface, under the influence of the transport velocities and minority-carrier density at both layer boundaries and of bulk recombination. The third equation describes the flow of these carriers across other layers. The power of the approach is considered to lie in its facility for analysis of the solar cell's performance layer by layer, giving a clear picture of the individual layer's influence on cell efficiency.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: IEEE Transactions on Electron Devices; ED-28; May 1981
    Format: text
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  • 68
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    Solar cell measurements (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The measurement of the electrical performance characteristics of individual solar cells is discussed. One of the reasons is determination of the output power, measurement of the effect of various degradation mechanisms, and separation of cells by current and voltage for eventual use in series and parallel combinations. Major problem areas in making accurate performance measurements are the determination of the irradiance level during measurement, the measurement and control of cell junction temperature, and the contacting of the separate current and potential leads to the cell under test. Solar cells respond to only part of the solar spectrum, irradiance measurement made with blackbody detectors lead to spectral mismatch errors. The use of reference cells with a spectral response similar to that of the test cell reduces this error. Reference cells are calibrated at standard atmospheric conditions with all cells calibrated at the same conditions.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Midwest Research Inst. Com. Photovoltaics Meas. Workshop Proc.; p 227-233
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  • 69
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    Chasing the Space Shuttle (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The use and modifications of the T-38 aircraft as chase planes for the STS-1 landing are discussed. Two planes tracked the approach at Edwards AFB, with the lead plane responsible for airspeed and altimetry calibration, technical photography, landing gear status, and height-above-touchdown calls; the second T-38 provided live TV and back-up. Modifications included extension of the landing gear extension speed, increasing the area of the speedbrakes, and installation of a TV system; the goal was to stay with the Shuttle below 40,000 ft while it descended at 15,000 ft/min. Ten T-38's were modified and the deployment of lead and back-up crews during the first Shuttle flight is outlined. Western Test Range C-band radar data of the Orbiter position were transformed into intercept coordinates and VHF relayed to the chase craft. Photographs were taken of the right and left sides and underside of the Shuttle while flying with the speedbrake up to match the Shuttle speed.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Format: text
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  • 70
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    Development of a comprehensive analysis for rotorcraft. II - Aircraft model, solution procedure and applications (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The development of a comprehensive analytical model of rotorcraft aerodynamics and dynamics is described. Particular emphasis is given to describing the reasons behind the choices and decisions involved in constructing the model. The analysis is designed to calculate rotor performance, loads and noise; helicopter vibration and gust response; flight dynamics and handling qualities; and system aeroelastic stability. It is intended for use in the design, testing and evaluation of a wide class of rotors and rotorcraft and to be the basis for further development of rotary wing theories. The general characteristics of the geometric, structural, inertial and aerodynamic models used for the rotorcraft components are described, including the assumptions introduced by the chosen models and the resulting capabilities and limitations. Finally, some examples from recent applications of the analysis are given.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Vertica; 5; 3, 19; 1981
    Format: text
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  • 71
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    Design for supercommuters (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: Action to be taken to prepare to implement efficient, modern commuter aircraft for the 1990s is outlined. The increase in the contribution of jet fuel costs to aircraft direct operating costs (DOC) is noted as the motivation for the introduction of turboprop-powered commuter aircraft, which use 15-20% less fuel per seat mile at short stage lengths, to replace larger jet transports. Designs proposed by various manufacturers which will make use of existing technology for 19-, 30- and 50-seat aircraft capable of carrying a full payload of passengers and baggage for 600 n mi and optimized for minimum DOC over a 100-n mi stage length are presented, and the improvements in fuel usage, DOC and passenger comfort to be obtained with the use of advanced technology are pointed out. The goals and considered technologies of the dedicated small-transport aircraft technology program recommended by a commuter air transport subcommittee of the NASA Advisory Council Aeronautics Advisory Committee to speed the development of commuter technology are then presented, with attention given to efforts of analysis, design and testing of propulsion systems, structures, aerodynamics and systems intended to result in 16-24% savings in DOC and up to 40% savings in fuel. The commuter development plans of various manufacturers are also indicated.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Astronautics and Aeronautics; 19; Feb. 198
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  • 72
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    General aviation airplane fuel economy system model (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The aerodynamic characteristics which affect the fuel consumption of general aviation aircraft are outlined. All data are presented in the form of graphs.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Langley Research Center Joint Univ. Program for Air Transportation Res., 1980; p 133-142
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  • 73
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    Photovoltaics (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The federal government has sponsored a program of research and development on terrestrial photovoltaic systems that is designed to reduce the costs of such systems through technological advances. There are many potential paths to lower system costs, and successful developments have led to increased private investment in photovoltaics. The prices for photovoltaic collectors and systems that appear to be achievable within this decade offer hope that the systems will soon be attractive in utility applications within the United States. Most of the advances achieved will also be directly applicable to the remote markets in which photovoltaic systems are now commercially successful
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Science; 212; June 26
    Format: text
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  • 74
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    Production of hydrogen by electron transfer catalysis using conventional and photochemical means (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: Alternate methods of generating hydrogen from the sulfuric acid thermal or electrochemical cycles are presented. A number of processes requiring chemical, electrochemical or photochemical methods are also presented. These include the design of potential photoelectrodes and photocatalytic membranes using Ru impregnated nafion tubing, and the design of experiments to study the catalyzed electrolytic formation of hydrogen and sulfuric acid from sulfur dioxide and water using quinones as catalysts. Experiments are carried out to determine the value of these approaches to energy conversion.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Courtesy Associates, Inc. Proc. of the DOE Thermal and Chem. Storage Ann. Contractor's Rev. Meeting; p 233-236
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  • 75
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    Overview of the Chemical/Hydrogen Energy Systems (C/HES) program (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The production, storage and transmission, and utilization of hydrogen are included. Management structure and the programmatic emphasis are summarized.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Courtesy Associates, Inc. Proc. of the DOE Thermal and Chem. Storage Ann. Contractor's Rev. Meeting; p 141-144
    Format: text
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  • 76
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    Chemical/Hydrogen Energy Storage Systems (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: Electrochemical and thermochemical systems are reviewed. Chemical heat pumps, end-use applications and systems studies, and storage systems and materials are also discussed.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Courtesy Associates, Inc. Proc. of the DOE Thermal and Chem. Storage Ann. Contractor's Rev. Meeting; p 145-149
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  • 77
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    An experimental study of SO3 dissociation as a mechanism for converting and transporting solar energy (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The high temperature catalytic dissocation of SO3 is an important chemical process being considered in the development and application of solar-thermal energy conversion, transport, and storage systems. A facility for evaluating chemical converter-heat exchangers at temperatures to 1000 C with high flow rates of gaseous SO3 feedstock has been assembled and operated on the NMSU campus. Several quartz and metal reactors containing different catalyst configurations have been tested. Descriptions of the test facility and of the reactors are given along with a presentation and discussion of experimental results.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Solar Energy; 27; 5, 19; 1981
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  • 78
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    Production cost comparisons of hydrogen from fossil and nuclear fuel and water decomposition (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: The comparative costs entailed in producing hydrogen by major technologies that rely on petroleum, natural gas, coal, thermochemical cycles, and electrolysis are examined. Techniques were developed for comparing these processes by formulating the process data and economic assessments on a uniform and consistent basis. These data were normalized to permit a meaningful comparative analysis of product costs of these processes.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Courtesy Associates, Inc. Proc. of the DOE Thermal and Chem. Storage Ann. Contractor's Rev. Meeting; p 227-231
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  • 79
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    Orbiter fuel cell improvement assessment (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The history of fuel cells and the theory of fuel cells is given. Expressions for thermodynamic and electrical efficiencies are developed. The voltage losses due to electrode activation, ohmic resistance and ionic diffusion are discussed. Present limitations of the Orbiter Fuel Cell, as well as proposed enhancements, are given. These enhancements are then evaluated and recommendations are given for fuel cell enhancement both for short-range as well as long-range performance improvement. Estimates of reliability and cost savings are given for enhancements where possible.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Houston Univ. The 1981 NASA ASEE Summer Fac. fellowship Program, Vol. 1; 27 p
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  • 80
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    Contact resistivities of sputtered TiN and Ti-TiN metallizations on solar-cell-type-silicon (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The resistivities of TiN and Ti-TiN contacts on a shallow junction solar-cell-type silicon substrate have been determined by the method of the transmission line model. The contacts investigated are shown to be suitable for standard solar cells from an electrical point of view. Contact resistivity values of the order of 0.0001 ohm/sq cm as obtained for the n(+)Si-TiSi2-TiN contact system may be acceptable for concentrations up to 100 times, but lower values are necessary beyond this point.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Solar Energy; 27; 4, 19; 1981
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  • 81
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    Influence of landing gear flexibility on aircraft performance during ground roll (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: An analysis is made of the influence of landing gear deflection characteristics on aircraft performance on the ground up to rotation. A quasi-steady dynamic equilibrium state is assumed, including other simplifying assumptions such as calm air conditions and normal aircraft lift and drag. Ground incidence is defined as the angle made by the mean aerodynamic chord of the wing with respect to the ground plane, and equations are given for force and balance which determine the quasi-equilibrium conditions for the aircraft during ground roll. Results indicate that the landing gear deflections lead to a substantial increase in the angle of attack, and the variation in the ground incidence due to landing gear flexibility could be as much as + or - 50%, and the reduction in tail load requirements almost 25%.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Journal of Aircraft; 18; Nov. 198
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  • 82
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    Status of the microwave power transmission components for the solar power satellite (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: During the 1970-1980 time period a substantial advance has been made in developing all portions of a microwave power transmission system for the solar power satellite (SPS). The most recent advances pertain to the transmitting portion of the system in the satellite and are based upon experimental observations of the use of the magnetron combined with a passive directional device to convert it into a highly efficient directional amplifier with excellent low-noise properties and potentially very long life. The ability of its microwave output to track a phase reference makes it possible to combine it with many other radiating units to provide a highly coherent microwave beam. The ability of its output to track an amplitude reference while operating from a dc power source with varying voltage makes it possible to eliminate most of the power conditioning equipment that would otherwise be necessary.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
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  • 83
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    Finite element thermal analysis of convectively-cooled aircraft structures (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The design complexity and size of convectively-cooled engine and airframe structures for hypersonic transports necessitate the use of large general purpose computer programs for both thermal and structural analyses. Generally thermal analyses are based on the lumped-parameter finite difference technique, and structural analyses are based on the finite element technique. Differences in these techniques make it difficult to achieve an efficient interface. It appears, therefore, desirable to conduct an integrated analysis based on a common technique. A summary is provided of efforts by NASA concerned with the development of an integrated thermal structural analysis capability using the finite element method. Particular attention is given to the development of conduction/forced-convection finite element methodology and applications which illustrate the capabilities of the developed concepts.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
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  • 84
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    Predicted airframe noise levels for certification flights (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: A correction is presented for a previously published inconsistency in predicted airframe noise values, which were based on approach velocities lower than those required for FAA certification. New figures are given for the following aircraft: DC-9-30, 727-200, A300-B2, L-1011, DC-10-10, and 747-200B. The new levels average 2.3 dB higher than those calculated for typical approach speeds.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Journal of Aircraft; 18; Sept
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  • 85
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    Dispersed solar thermal generation employing parabolic dish-electric transport with field modulated generator systems (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: This paper discusses the application of field modulated generator systems (FMGS) to dispersed solar-thermal-electric generation from a parabolic dish field with electric transport. Each solar generation unit is rated at 15 kWe and the power generated by an array of such units is electrically collected for insertion into an existing utility grid. Such an approach appears to be most suitable when the heat engine rotational speeds are high (greater than 6000 r/min) and, in particular, if they are operated in the variable speed mode and if utility-grade a.c. is required for direct insertion into the grid without an intermediate electric energy storage and reconversion system. Predictions of overall efficiencies based on conservative efficiency figures for the FMGS are in the range of 25 per cent and should be encouraging to those involved in the development of cost-effective dispersed solar thermal power systems.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Solar Energy; 27; 1, 19; 1981
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  • 86
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    Development of a comprehensive analysis for rotorcraft. I - Rotor model and wake analysis (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The development of a comprehensive analytical model of rotorcraft aerodynamics and dynamics is described. Particular emphasis is given to describing the reasons behind the choices and decisions involved in constructing the model. The analysis is designed to calculate rotor performance, loads and noise; helicopter vibration and gust response; flight dynamics and handling qualities; and system aeroelastic stability. It is intended for use in the design, testing and evaluation of a wide class of rotors and rotorcraft, and to be the basis for further development of rotary wing theories. The general characteristics of the geometric, structural, inertial, and aerodynamic models used for the rotorcraft components are described, including the assumptions introduced by the chosen models and the resulting capabilities and limitations. Finally, some examples from recent applications of the analysis are given.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Vertica; 5; 2, 19; 1981
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  • 87
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    The properties of polycrystalline silicon solar cells with controlled titanium additions (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: By coupling the results of electrical measurements, such as spectral response, lighted and dark I-V determinations, and deep-level-transient spectroscopy with optical and laser scan photomicroscopy, the effects of grain boundaries and impurities on silicon solar cells were evaluated. Titanium, which produces two deep levels in silicon, degrades cell performance by reducing bulk lifetime and thus cell short-circuit current. Electrically active grain boundaries induce carrier recombination in the bulk and depletion regions of the solar cell. Experimental data imply a small but measurable segregation of titanium into some grain boundaries of the polycrystalline silicon containing high Ti concentration. However, for the titanium-contaminated polycrystalline material used in this study, solar cell performance is dominated by the electrically active titanium concentration in the grains. Microstructural impacts on the devices are of secondary importance
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: IEEE Transactions on Electron Devices; ED-28; Jan. 198
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  • 88
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    Aircraft design using the National Transonic Facility (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The utility of the cryogenic high Reynolds number test facility as a production tunnel is evaluated. Aerodynamic performance evaluation, numerical wing design verification, and high Reynolds number theoretical extensions are considered. A priority ranking of NTF uses from an airframe development viewpoint is presented.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Langley Research Center High Reynolds Number Res. - 1980; p 149-152
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  • 89
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    Assessment of solar-assisted gas-fired heat pump systems (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: As a possible application for the Goldstone Energy Project, the performance of a 10 ton heat pump unit using a hybrid solar gas energy source was evaluated in an effort to optimize the solar collector size. The heat pump system is designed to provide all the cooling and/or heating requirements of a selected office building. The system performance is to be augmented in the heating mode by utilizing the waste heat from the power cycle. A simplified system analysis is described to assess and compute interrrelationships of the engine, heat pump, and solar and building performance parameters, and to optimize the solar concentrator/building area ratio for a minimum total system cost. In addition, four alternative heating cooling systems, commonly used for building comfort, are described; their costs are compared, and are found to be less competitive with the gas solar heat pump system at the projected solar equipment costs.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: The Telecommun. and Data Acquisition Rept.; p 154-190
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  • 90
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    Computer simulated building energy consumption for verification of energy conservation measures in network facilities (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: A computer program called ECPVER (Energy Consumption Program - Verification) was developed to simulate all energy loads for any number of buildings. The program computes simulated daily, monthly, and yearly energy consumption which can be compared with actual meter readings for the same time period. Such comparison can lead to validation of the model under a variety of conditions, which allows it to be used to predict future energy saving due to energy conservation measures. Predicted energy saving can then be compared with actual saving to verify the effectiveness of those energy conservation changes. This verification procedure is planned to be an important advancement in the Deep Space Network Energy Project, which seeks to reduce energy cost and consumption at all DSN Deep Space Stations.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Telecommun. and Data Acquisition; p 142-146
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  • 91
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    Fuel cells feasibility (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The technical and economic status of fuel cells is assessed with emphasis on their potential benefits to the Deep Space Network. The fuel cell, what it is, how it operates, and what its outputs are, is reviewed. Major technical problems of the fuel cell and its components are highlighted. Due to these problems and economic considerations it is concluded that fuel cells will not become commercially viable until the early 1990s.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: The Telecommun. and Data Acquisition; p 154-168
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  • 92
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    A sensitivity model for energy consumption in buildings. Part 1: Effect of exterior environment (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: A simple analytical model is developed for the simulation of seasonal heating and cooling loads of any class of buildings to complement available computerized techniques which make hourly, daily, and monthly calculations. An expression for the annual energy utilization index, which is a common measure of rating buildings having the same functional utilization, is derived to include about 30 parameters for both building interior and exterior environments. The sensitivity of a general class building to either controlled or uncontrolled weather parameters is examined. A hypothetical office type building, located at the Goldstone Space Communication Complex, Goldstone, California, is selected as an example for the numerical sensitivity evaluations. Several expressions of variations in local outside air temperature, pressure, solar radiation, and wind velocity are presented.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: The Telecommun. and Data Acquisition; p 58-88
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  • 93
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    Technology development status at McDonnell Douglas (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The significant technology items of the Concorde and the conceptual MCD baseline advanced supersonic transport are compared. The four major improvements are in the areas of range performance, structures (materials), aerodynamics, and in community noise. Presentation charts show aerodynamic efficiency; the reoptimized wing; low scale lift/drag ratio; control systems; structural modeling and analysis; weight and cost comparisons for superplasticity diffusion bonded titanium sandwich structures and for aluminum brazed titanium honeycomb structures; operating cost reduction; suppressor nozzles; noise reduction and range; the bicone inlet; a market summary; environmental issues; high priority items; the titanium wing and fuselage test components; and technology validation.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Langley Research Center Supersonic Cruise Res., 1979, Pt. 2; p 873-888
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  • 94
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    An assessment of buffer strips for improving damage tolerance (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: Graphite/epoxy panels with buffer strips were tested in tension to measure their residual strength with crack-like damage. Panels were made with 45/0/-45/90(2S) and 45/0/450(2S) layups. The buffer strips were parallel to the loading directions. They were made by replacing narrow strips of the 0 deg graphite plies with strips of either 0 deg S-Glass/epoxy or Kevlar-49/epoxy on either a one for one or a two for one basis. In a third case, O deg graphite/epoxy was used as the buffer material and thin, perforated Mylar strips were placed between the 0 deg piles and the cross-plies to weaken the interfaces and thus to isolate the 0 deg plies. Some panels were made with buffer strips of different widths and spacings. The buffer strips arrested the cracks and increased the residual strengths significantly over those plain laminates without buffer strips. A shear-lag type stress analysis correctly predicted the effects of layups, buffer material, buffer strip width and spacing, and the number of plies of buffer material.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Supersonic Cruise Res., 1979, Pt. 2; p 657-673
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  • 95
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    Supersonic cruise research aircraft structural studies: Methods and results (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: NASA Langley Research Center SCAR in-house structural studies are reviewed. In methods development, advances include a new system of integrated computer programs called ISSYS, progress in determining aerodynamic loads and aerodynamically induced structural loads (including those due to gusts), flutter optimization for composite and metal airframe configurations using refined and simplified mathematical models, and synthesis of active controls. Results given address several aspects of various SCR configurations. These results include flutter penalties on composite wing, flutter suppression using active controls, roll control effectiveness, wing tip ground clearance, tail size effect on flutter, engine weight and mass distribution influence on flutter, and strength and flutter optimization of new configurations. The ISSYS system of integrated programs performed well in all the applications illustrated by the results, the diversity of which attests to ISSYS' versatility.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: Supersonic Cruise Res., 1979, Pt. 2; p 617-656
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  • 96
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    Opportunities for structural improvements for an advanced supersonic transport vehicle (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: The superplastically formed diffusion-bonded (SPF/DB) program has developed successfully and far enough to recommend that a major structural program to validate the weight and cost of SPF/DB sandwich titanium structure should be initiated. The NASA Langley study of wing and fuselage SPF/DB sandwich panels shows that this process is potentially structurally efficient. The Douglas SPF/DB expanded sandwich process that utilizes a welded core sheet that expands to face sheets proves to be very efficient. The theoretical weight optimization design charts for the wing and fuselage concepts were validated by small-scale tests. Mnay design applications were fabricated. Projecting the results of an SPF/DB sandwich airframe structure to a MDC AST design shows significant weight and cost savings. A 6 percent lower direct operating cost was calculated. A growth AST utilizing composites, metal matrices, and SPF/DB sandwich shows future promise for a post-1990 technology readiness. Titanium SPF/DB sandwich, compared to presently available aluminum structure, is superior for application to a Mach 2.2 supersonic transport.
    Schlagwort(e): AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: NASA. Langley Research Center Supersonic Cruise Res., 1979, Pt. 2; p 589-616
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  • 97
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    Glass as encapsulation for low-cost photovoltaic solar arrays (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: In photovoltaic systems, the encapsulant material that protects the solar cells should be highly transparent and very durable. Glass satisfies these two criteria and is considered a primary candidate for low-cost, photovoltaic encapsulation systems. In this paper, various aspects of glass encapsulation are treated that are important for the designer of photovoltaic systems. Candidate glasses and available information defining the state of the art of glass encapsulation materials and processes for automated, high volume production of terrestrial photovoltaic devices and related applications are presented. The desired characteristics of glass encapsulation are (1) low degradation rates, (2) high transmittance, (3) high reliability, (4) low-cost, and (5) high annual production capacity. The glass design areas treated herein include the types of glass, sources, prices, physical properties and glass modifications, such as antireflection coatings.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
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  • 98
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    Parabolic dish systems at work - Applying the concepts (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: An overview is given of parabolic dish solar concentrator application experiments being conducted by the U.S. Department of Energy. The 'engineering experiments' comprise the testing of (1) a small-community powerplant system, in conjunction with a grid-connected utility; (2) stand-alone applications at remote sites such as military installations, radar stations and villages; and (3) dish modules that can deliver heat for direct use in industrial processes. Applicability projections are based on a dish and receiver that use a Brayton engine with an engine/generator efficiency of 25% and a production level of up to 25,000 units per year. Analyses indicate that parabolic-dish power systems can potentially replace small, oil-fired power plants in all regions of the U.S. between 1985 and 1991.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Sunworld; 5; May 1981
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  • 99
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    Parabolic dish collectors - A solar option (1981)
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    Publikationsdatum: 2011-08-18
    Beschreibung: A description is given of several parabolic-dish high temperature solar thermal systems currently undergoing performance trials. A single parabolic dish has the potential for generating 20 to 30 kW of electricity with fluid temperatures from 300 to 1650 C. Each dish is a complete power-producing unit, and may function either independently or as part of a group of linked modules. The two dish designs under consideration are of 11 and 12 meter diameters, yielding receiver operating temperatures of 925 and 815 C, respectively. The receiver designs described include (1) an organic working fluid (toluene) Rankine cycle engine; (2) a Brayton open cycle unit incorporating a hybrid combustion chamber and nozzle and a shaft-coupled permanent magnet alternator; and (3) a modified Stirling cycle device originally designed for automotive use. Also considered are thermal buffer energy storage and thermochemical transport and storage.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Sunworld; 5; May 1981
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  • 100
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    Steam reforming of n-hexane on pellet and monolithic catalyst beds. A comparative study on improvements due to heat transfer (1981)
    In:  Other Sources
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    Publikationsdatum: 2011-08-18
    Beschreibung: Monolithic catalysts with higher available active surface areas and better thermal conductivity than conventional pellets beds, making possible the steam reforming of fuels heavier than naphtha, were examined. Performance comparisons were made between conventional pellet beds and honeycomb monolith catalysts using n-hexane as the fuel. Metal-supported monoliths were examined. These offer higher structural stability and higher thermal conductivity than ceramic supports. Data from two metal monoliths of different nickel catalyst loadings were compared to pellets under the same operating conditions. Improved heat transfer and better conversion efficiencies were obtained with the monolith having higher catalyst loading. Surface-gas interaction was observed throughout the length of the monoliths.
    Schlagwort(e): ENERGY PRODUCTION AND CONVERSION
    Materialart: Conversion of Hydrocarbons for Fuel Cell Appl.; p 75-120
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