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  • Other Sources  (626)
  • INSTRUMENTATION AND PHOTOGRAPHY  (248)
  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (171)
  • MECHANICAL ENGINEERING  (146)
  • Inorganic Chemistry
  • Seismology
  • 1980-1984  (626)
  • 1955-1959
  • 1950-1954
  • 1981  (626)
Collection
Source
Keywords
Publisher
Years
  • 1980-1984  (626)
  • 1955-1959
  • 1950-1954
Year
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Scaling ; Magnitude ; Nuclear explosion
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Source ; Seismology ; Fracture ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Friction ; Fracture ; Rock mechanics ; Seismology ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Earth model, also for more shallow analyses ! ; PREM ; PEPI ; Dziewonski
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Earthquake ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe) ; Fault plane solution, focal mechanism
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Strong motions ; Spectrum ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: SH waves ; Layers ; Seismology ; NOModelling ; Synthetic seismograms ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Energy (of earthquakes) ; nuclear ; waste ; disposal
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    BIBLIOGRAPHY SEISMOLOGY
  • 9
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    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
    Publication Date: 1981
    Keywords: Strong motions ; Seismology ; Inhomogeneity ; Fracture ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: earth mantle ; Seismology ; P-waves ; residues ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Strong motions ; Earthquake ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Description: Ellipsoid-Least-Squares-Fit
    Keywords: Seismology ; Polarization ; Three component data ; JPE
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: P-waves ; Fracture ; Fracture time (duration) ; Earthquake ; Seismology ; Seismic arrays
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Earthquake ; Inversion ; Source parameters ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Source parameters ; Statistical investigations ; Fault zone ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: NOModelling ; Layers ; Seismology ; Synthetic seismograms ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Moment tensor ; Inversion ; Seismicity ; Rayleigh waves ; Phase velocity ; Hypocentral depth ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Seismics (controlled source seismology) ; Filter- ; Polarization
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    BIBLIOGRAPHY SEISMOLOGY
  • 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)
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    Publication Date: 1981
    Keywords: Seismology ; Earthquake ; Source
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Earthquake ; Seismology ; Geol. aspects ; Tectonics ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismicity ; Seismology ; Detectors ; Kulhanek ; Wahlstroem ; Wahlstrom
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Travel time ; Data analysis / ~ processing
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Discrimination ; Seismology ; ConvolutionR ; Source ; Nuclear explosion
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismic networks ; Handbook of geophysics ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Fault plane solution, focal mechanism ; Tectonics ; Plate tectonics ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Magnitude ; Seismology ; Review article ; Bath
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Surface waves ; CRUST ; China ; Seismology ; Seismics (controlled source seismology)
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Moment tensor ; Source parameters ; Earthquake ; Hypocentral depth ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Detectors ; sta ; Transformations ; squ ; median ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Magnitude ; Seismology ; Earthquake catalog ; PEPI
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Attenuation ; Surface waves ; NOModelling ; CRUST ; Seismology ; Quality factor ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismology ; Source parameters ; Inversion ; Induced seismicity ; Mining geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Source parameters ; Seismology ; Source ; Seismicity ; Wave form analysis ; JGR ; Dziewonski
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: NOModelling ; Inhomogeneity ; Seismology ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: FROTH ; RUB ; GMG ; 3.15.80 ; Textbook of geophysics ; Seismology ; Waves ; Wavelet processing ; SModelling ; Dislocation ; Elasticity theory of dislocations ; Source
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Nuclear explosion ; Seismology ; Discrimination ; Source
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: Seismology ; Seismics (controlled source seismology) ; CRUST ; earth mantle ; Travel time ; GRL ; Necioglu
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: Seismology ; Source parameters ; Inversion ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Seismicity ; Earthquake precursor: statistical anal. of seismicity ; Seismology ; Earthquake precursor: prediction research ; FROTH ; (abstract)
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    BIBLIOGRAPHY SEISMOLOGY
  • 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)
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    Publication Date: 1981
    Keywords: Seismology ; Nuclear explosion ; Discrimination
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: Earthquake precursor: prediction research ; Seismicity ; Seismology ; Earthquake precursor: stresses ; Fault plane solution, focal mechanism
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    BIBLIOGRAPHY SEISMOLOGY
  • 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: Seismology ; NOR ; PIC ; f-k-Analysis ; Seismic arrays ; NOISE ; AUD ; Location ; Nuclear explosion
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  • 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
    Publication Date: 1981
    Keywords: Seismology ; Earthquake ; Source
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  • 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
    Publication Date: 1981
    Keywords: 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)
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    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: Seismology ; Seismicity ; Earthquake precursor: prediction research ; Earthquake risk ; Earthquake hazard ; Proceedings of a conference
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  • 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: 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
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    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: 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)
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    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 1981
    Description: 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 ...
    Keywords: 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
    Publication Date: 1981
    Keywords: 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
    Publication Date: 2006-02-14
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Advan. Aerodyn.: Selected NASA Res.; p 79-94
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  • 63
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    F-111 TACT natural laminar flow glove flight results (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Langley Research Center Advan. Aerodyn.: Selected NASA Res.; p 11-20
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  • 64
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    Active cavity radiometer (1981)
    In:  CASI
    Details
    Publication Date: 2006-06-04
    Description: The active cavity radiometer (ACR) experiment on the Spacelab 1 mission to measure the total solar irradiance is discussed. Short and long term variations in the total solar output of optical energy are studied. Solar total irradiance observation provides information on the solar cycle and other long term trends in solar output that are of climatological significance as well as short term solar physics phenomena. The interaction of solar radiation with the Earth's atmosphere, oceans, and land masses provides the primary driving forces for the formation of weather systems and the determination of climate. Astrophysical measurements determine the total energy flux. The principal role of the ACR observations support extended solar irradiance experiments on free flying satellites. Solar irradiance measurements are important in the establishment of the radiation scale at the solar total flux level in the international system of units (SI).
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions; 4 p
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  • 65
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    Very wide field camera (1981)
    In:  CASI
    Details
    Publication Date: 2006-06-04
    Description: The study of galactic and faint extragalactic extended sources and peculiar ultraviolet objects by a very wide field of view camera, operated in the ultraviolet photometric and spectrometric modes is discussed. The photometric mode is direct photography through filters for observation of the following sources: (1) large scale distribution of ultraviolet radiation in the Milky Way; (2) diffusion of the galactic light above the galactic plane and in front of the large absorbing clouds; (3) the optical emission of the interstellar matter; (4) stars, and starlike objects with diameters less than 3 arc minutes. In the spectrometric mode (nebular spectrograph) the light from the center of the photometric field is concentrated on a slit covering 10 degrees by 10 arc minutes on the sky.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions; 3 p
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  • 66
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    Personal miniature electrophysiological tape recorder (1981)
    In:  CASI
    Details
    Publication Date: 2006-06-05
    Description: The use of a personal miniature electrophysiological tape recorder to measure the physiological reactions of space flight personnel to space flight stress and weightlessness is described. The Oxford Instruments Medilog recorder, a battery-powered, four-channel cassette tape recorder with 24 hour endurance is carried on the person and will record EKG, EOG, EEG, and timing and event markers. The data will give information about heart rate and morphology changes, and document adaptation to zero gravity on the part of subjects who, unlike highly trained astronauts, are more representative of the normal population than were the subjects of previous space flight studies.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions; 2 p
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  • 67
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    Metric camera experiment (1981)
    In:  CASI
    Details
    Publication Date: 2006-06-04
    Description: A test of the mapping capabilities of high resolution space photography taken at the resolution limit of image motion on large film format is planned. The metric camera system and its planned operation are described.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions; 4 p
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  • 68
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    Waves in the OH emissive layer (1981)
    In:  CASI
    Details
    Publication Date: 2006-06-04
    Description: Photography and measurement of cloud-like structures of bright parallel bands observed in near infrared photography of the night sky is planned. The instrument is described and the purpose of the experiment summarized.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions; 2 p
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  • 69
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    Grille spectrometer (1981)
    In:  CASI
    Details
    Publication Date: 2006-06-04
    Description: High resolution infrared spectroscopic observations of the Earth's limb in the wavelength range characteristic of the vibrational-rotational lines of trace atmospheric constituents is planned. The instrument and its operation and the purpose of the experiments are summarized.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions; 3 p
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  • 70
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    An automatic light scattering CCN counter (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The counter is a static thermal diffusion chamber which has been modified to include an optical system for the determination of droplet concentration by the measurement of scattered light. The determination of concentration is made by measurement of the peak scattered light signal from the cloud of growing droplets which is a function of both the droplet concentration and chamber supersaturation. Because the formation of the peak is related to the rate of growth of the droplets and sedimentation, both of which are determined by supersaturation, the system calibration can be uniquely determined by comparison with an absolute counter such as a static diffusion chamber with a photographic recording system.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 40-41
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  • 71
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    Cloud condensation nucleus counter by impactor sampling technique (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Unlike typical CCN counters, this device counts the numbers of water droplets condensed on aerosol particles sampled on a microcover glass at various different relative humidities. The relative humidities ranged from 75 percent to a calculated value of 110 percent. A schematic of the apparatus is shown. The individual CCN can be identified in an optical micrograph and scanning electron micrograph and may be inspected for their chemical composition later.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 35-36
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    The CCN counter of the IOPG of Puy de Dome: Main characterisics and results of measurements (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: In performing the data analysis of the measurements achieved during the Workshop with the device, a global approach was preferred rather than an individual analysis, in order to illustrate some main characteristics in the behavior of the device with respect to a mean behavior resulting from a general survey of all the equipments involved in each experiment. The device tends generally to overestimate the CCN concentrations measured near the high supersaturations and sometimes underestimates the concentrations close to 0.1% or 0.2% of supersaturation. Despite the fact that it belongs to a type of static diffusion chamber, it shows, however, similar spectra to those obtained with other types of chambers (continuous flow diffusion chamber and haze chamber).
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 17-19
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  • 73
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    Contribution to CCN Workshop report from University of Wyoming group (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The group's CCN counter is described. It is a static, horizontal, parallel plate thermal gradient diffusion chamber. Examples of the application of the CCN are presented and include the CCN spectra measured during the winter of 1978-79 near Elk Mountain, Wyoming. Comparisons of droplet concentrations derived from upwind CCN spectra are covered.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 11-13
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  • 74
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    Effect of heavy rain on aircraft (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems 76-80 (SEE N82-21139 12-01)
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  • 75
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    Meteorology impact on future aircraft design (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 29-34
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  • 76
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    Measurement of the aerosol size distribution with NRL's mobility analyzer (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The size distribution was measured in the size range between 0.0057 and 0.57 micrometer radius. A description of the instrumentation and data analysis is given, together with the measured size distributions calculated for 23 experiments.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 69-78
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  • 77
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    Modified MEE Industries static thermal gradient diffusion cloud chamber (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The experiments performed at the Workshop were undertaken to confirm the calculated sample volume, determine the usable range of supersaturation, and minimum detectable size. Comparison of absolute CCN concentrations with other state-of-the-art continuous flow diffusion chambers at supersaturations near 1 percent indicated that the volume used produced CCN concentrations well within the range of CCN concentrations determined at the workshop. This agreement is interpreted to mean the sample volume was correct. Direct measurements of the beam geometry done in the laboratory indicated a factor of 4-5 error. This error is apparently due to the larger apparent visible beam diameter versus the actual usable beam diameter given the droplet illumination, chamber optical geometry, microscope optics and film characteristics.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 44-45
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    A clamp mechanism for deployable three-ton payloads (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The requirements, capabilities, and unique design features of the instrument payload subsystem payload clamp assembly (PCA) are presented. The PCA is designed to have the flexibility to accommodate a wide payload range varying from 0.5 m to 3 m in diameter and from 500 kg to 3000 kg mass. This is achieved by modular clamp design in connection with replaceable struts. The design features include clamping of payload in a statically determined way and actuation of clamp latches by means of single linear actuator via ropes. The vibration and TV environmental conditions for the mechanism are extremely severe. A structural and prototype model was built. Test results of the operating characteristic are presented. In addition, problems of tribology are highlighted.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA. Marshall Space Flight Center The 15th Aerospace Mech. Symp.; p 375-390
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    An antenna pointing mechanism for large reflector antennas (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: An antenna pointing mechanism for large reflector antennas on direct broadcasting communication satellites was built and tested. After listing the requirements and constraints for this equipment the model is described, and performance figures are given. Futhermore, results of the qualification level tests, including functional, vibrational, thermovacuum, and accelerated life tests are reported. These tests were completed successfully.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA. Marshall Space Flight Center The 15th Aerospace Mech. Symp.; p 253-261
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    A drive unit for the instrument pointing system (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The requirements, capabilities, and unique design features of the instrument pointing system drive units (DU) are presented. The DU's are identical for all three gimbal axes (elevation, cross elevation, and azimuth) and provide alternating rotation of shaft versus the housing of + or - 180 deg. The design features include: two ball bearing cartridges using cemented carbide balls coated with TiC a layer; redundant brushless torque motors and resolvers; a load by-pass mechanism driven by a dc torque motor to off-load the bearings during ascent/descent, ground transportation, and to provide an emergency breaking capability; and cabling over each gimbal axis by means of cable follow-up consisting of 13 signal and 15 power flat band cable loops. Test results of disturbance torque characteristics are presented.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA. Marshall Space Flight Center The 15th Aerospace Mech. Symp.; p 263-278
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    An antenna fine pointing mechanism (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: SOFA, a device designed for the highly accurate 2 axis pointing of antenna or any feature installed on a spacecraft is described. The major characteristic of this system is complete freedom from friction and wear out, resulting in numerous advantages, such as outstanding precision, virtually endless service life, high simplicity, and reliability. The sizing method is described and performances are analyzed. The results from analogue simulations are presented. A functional model of the electrical and mechanical parts was built and subjected to on ground tests using a 2 axis platform simulating the spacecraft's motions. The results obtained are thoroughly in keeping with the predictions and simulations. Various possible applications of the SOFA system are mentioned.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA. Marshall Space Flight Center The 15th Aerospace Mech. Symp.; p 235-252
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    A mechanical drive for retractable telescopic masts (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Test results on the mechanical drive have indicated that the system is capable of deploying a typical telescopic mast under ambient conditions. The design can be considered for a wide range of space applications since, in theory, there is no limit to the number of tubes that can be deployed. The mechanical system offers a number of advantages over a gas driven system, such as the ability to retract and also provide a significant mass saving.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA. Marshall Space Flight Center The 15th Aerospace Mech. Symp.; p 205-217
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    Multi-channel chopper system for a total ozone mapping spectrometer (1981)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A multi-channel chopper system designed and built to stringent specifications is providing an excellent performance for a total ozone mapping spectrometer (TOMS). State of the art machining technology, suitable material selection, and a way to hold and position the slit plate resulted in the instrument's better than expected performance. A shutter method used for internal calibration allows compensation for the occurrence of an unlikely wavelength shift during testing, launch, or during the orbiting life of the instrument. The TOMS is part of a payload on Nimbus 7 launched on October 24, 1978.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Marshall Space Flight Center The 15th aerospace Mech. Symp.; p 63-75
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    Description of the NRL isothermal haze chamber (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: In the IHC the critical supersaturation is inferred from the measurement of the size of particles which have grown to their equilibrium size at exactly 100 percent RH. The largest size channel corresponds to a critical supersaturation of 0.014 percent. The growth time required for particles of this size to reach their equilibrium size exceeds the 110 second residence time in the IHC. Since the supersaturation spectrum is always very steep in this region, the contribution of these larger particles which have not yet attained their equilibrium size to smaller size channels is negligible. However, failure of these particles to reach their equilibrium size could result in a significant lowering of the count in the size channel corresponding to the smaller critical supersaturation.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 42-43
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    Static diffusion cloud chambers (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The chamber geometry and optical arrangement are described. The supersaturation range is given and consists of readings taken at five fixed points: 0.25%, 0.5%, 0.75%, 1.0%, and 1.25%. The detection system is described including light source, cameras, and photocell detectors. The temperature control and the calibration of the chamber are discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 26-27
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  • 86
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    Description and discussion of the NRL TGDCC (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The NRL thermal gradient diffusion cloud chamber (TGDCC) consists of two plates 7.5 cm in diameter separated by 1.25 cm and covered with saturated filter paper. The cylindrical wall separating the plates is glass. The top plate is at room temperature and the bottom plate is cooled with a thermoelectric cooler. The temperature difference is measured with several sets of thermocouples. The CCN concentration was determined from the video recording. This procedure of averaging the maximum count obtained on several successive recordings at the same supersaturation results in concentrations which are somewhat higher than concentrations calculated from an average across the plateau.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 14-16
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  • 87
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    Meteorological impact on aviation fuel efficiency (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Marshall Space Flight Center Proc.: 5th Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 15-19
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  • 88
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    Tribology experiment (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: A two-dimensional concept for Spacelab rack 7 was developed to study the interaction of liquid lubricants and surfaces under static and dynamic conditions in a low-gravity environment fluid wetting and spreading experiments of a journal bearing experiments, and means to accurately measure and record the low-gravity environment during experimentation are planned. The wetting and spreading process of selected commercial lubricants on representative surface are to the observes in a near-zero gravity environment.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA. Marshall Space Flight Center Spacecraft Dyn. as Related to Lab. Expt. in Space; p 58-60
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  • 89
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    Comparing dry aerosol size measurements (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Two instruments were used to size dry aerosols for the CCN experiments: the Naval Research Laboratory (NRL) instrument which uses an electrical mobility analyzer to separate the aerosol size fractions and a diffusion chamber to grow and count the particles and the University of Wyoming (WYO) aerosol monitoring system. Measurements from these two systems were usually found to be in agreement during the CCN Workshop. Two examples are presented to compare aerosol size distribution measurements of the two instruments: experiment 8 (monodisperse NaCl) and experiment 27 (polydisperse AgI). Differential (dN/dR) and cumulative plots are shown for both instruments for experiment 8 and experiment 27; also shown are Aitken particle measurements for comparison.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 106-107
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  • 90
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    CCN comparisons of static diffusion chambers (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Nine CCN counters of the static diffusion (SDC) type were compared with one another and with continuous flow diffusion (CFD) chambers. The nine SDCs showed a considerable amount of variation, largely attributable to newness and/or lack of prior calibration of some units. The five more consistent instruments agreed quite well, to within at least 20 percent of the NRL mobility analyzer and to within 10 percent at 1 percent supersaturation. There was satisfactory agreement between the more reliable SDC and CFD chambers.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 57-63
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  • 91
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    Diffusion tube (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The diffusion tube was designed to operate below about 0.25 percent of water supersaturation. It is simply a long tube lined on the inside with a damp chamois cloth, and heated isothermally to a few degrees centigrade above the incoming air. The diffusion coefficient for water vapor is slightly larger than that for heat, making it possible to supersaturate the airflow. This is the same principle by which transient supersaturations may occur in parallel plate cloud chambers. Only the diffusion of vapor and heat from the walls into the moving air are considered.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 37-39
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  • 92
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    A description of the UK Meteorological Office CCN counter (1981)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The chamber is a thermal gradient diffusion type with the upper plate at room temperature and the lower plate thermoelectrically cooled. The light from a 25W projector bulb is focused in a beam of approximations 1x3 mm in the central part of the chamber. The light scattered by drops is viewed in the forward direction (40 deg) by a microscope and a sensitive photodetector. Experiments were performed to relate the peak output from the photocell with the maximum number of drops in the beam recorded photographically. The microscope is used to check the calibration at low concentrations of CCN. The results of the experiments and the performance of the counter are reported.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Desert Research Inst. The Third Intern. Cloud Condensation Nuclei Workshop; p 33-34
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  • 93
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    Low-power portable geophysical data acquisition system and its use in geomagnetic measurements (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A low-power portable data acquisition system presently in use for geomagnetic measurements is described. The system is composed of a data-processing system containing a low-power microprocessor, a 9-track digital tape recorder, and a rechargeable battery pack. The magnetometer is a low-power three axis fluxgate design. Under program control the data processing system keeps track of time of day and date, samples three analog magnetometer outputs at intervals of either 0.4 or 2 s, digitizes the data to 15-bit resolution, and, depending upon relative magnetic activity, decides upon data compression to increase the tape storage capacity. It also monitors and records internal voltages and provides self-checking functions which may be monitored through a visual readout on the control panel. The system is mounted in a rugged, weather-tight carrying case suitable for use outdoors with minimal protection. The system, including magnetometer, uses 1.6-W power and can store 5.7 Mbytes of data.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE Transactions on Geoscience and Remote Sensing; GE-19; July 198
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  • 94
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    Nuclear Science Symposium, 27th, and Symposium on Nuclear Power Systems, 12th, Orlando, Fla., November 5-7, 1980, Proceedings (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Advances in instrumentation for use in nuclear-science studies are described. Consideration is given to medical instrumentation, computerized fluoroscopy, environmental instrumentation, data acquisition techniques, semiconductor detectors, microchannel plates and photomultiplier tubes, reactor instrumentation, neutron detectors and proportional counters, and space instrumentation.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 95
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    Performance of room temperature mercuric iodide /HgI2/ detectors in the ultralow-energy X-ray region (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Experiments have been done to study the performance of mercuric iodide (HgI2) detectors in the ultralow-energy X-ray region. Energy resolution values of 245 eV (FWHM) for the Mg K-alpha X-ray line at 1.25 keV and 225 eV (FWHM) for the electronic noise linewidth have been obtained for an HgI2 detector with painted carbon contacts using a pulsed-light feedback preamplifier; the whole system was operated at room temperature. The resolution values in the ultralow-energy region are still limited by electronic noise of the system. In an attempt to minimize X-ray attenuation in the front contact, detectors were prepared with thin evaporated Pd contacts. These detectors show a pronounced low-energy tailing of the photopeak below a few keV, in contrast to the spectra obtained by detectors with carbon contact. An attempt has been made to explain the tailing effect starting with models wich have been proposed to describe similar effects in Ge detectors.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 96
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    Response of large cavity ion chambers to space protons (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The assumption that spherical-shell ion chamber rssponse is equal to the dose in the center of the cavity is found to be a poor approximation for ion chambers used for area monitoring in the space program. The dose response is calculated using the appropriate areal density distribution function. Effects of nuclear reaction are evaluated using proton buildup factors. Errors of up to 100% are found for some components of the space radiation environments.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Nuclear Technology; 52; 1, Ja; Jan. 198
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  • 97
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    Chasing the Space Shuttle (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
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  • 98
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    Development of a comprehensive analysis for rotorcraft. II - Aircraft model, solution procedure and applications (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: 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.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Vertica; 5; 3, 19; 1981
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  • 99
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    The transfer of polytetrafluoroethylene studied by X-ray photoelectron spectroscopy (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A polytetrafluoroethylene (PTFE) sphere of radius 4.8 mm was rubbed against nickel and S-Monel at speeds from 0.94 to 94 mm/s and at loads from 0.19 to 3.9 N. The transfer film of PTFE on the metal was examined with X-ray photoelectron spectroscopy. In all cases the film was found to be indistinguishable from bulk PTFE. A trace of metal fluoride was observed whether the rubbing took place on oxidized or atomically clean metal. The film was of the order of a molecule thick for the entire range of loads and did not increase with repeated passes over the same rubbed area. An erratic increase in thickness at rubbing speeds above 10 mm/s was taken as evidence of random transfer of bulk material.
    Keywords: MECHANICAL ENGINEERING
    Type: Wear; 66; Feb. 16
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  • 100
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    Deviation-free Bragg cell frequency-shifting (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A method is described of applying a variable frequency-shift to a laser beam, by means of Bragg cells, in which the direction of the output diffracted beam is unaffected by the magnitude of the applied shift. Applications of the technique to reference-beam and Doppler-difference forms of laser anemometry are discussed together with methods of obtaining increased dynamic range.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Applied Optics; 20; Feb. 15
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