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  • Other Sources  (447)
  • SOLAR PHYSICS  (213)
  • ASTRONAUTICS (GENERAL)  (185)
  • Industrial Chemistry
  • Inorganic Chemistry
  • Seismology
  • 2020-2024
  • 2005-2009
  • 1985-1989
  • 1975-1979  (447)
  • 1950-1954
  • 1979  (447)
Collection
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  • 2020-2024
  • 2005-2009
  • 1985-1989
  • 1975-1979  (447)
  • 1950-1954
Year
  • 1
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    Are foreshocks distinctive? Evidence from the 1966 Parkfield and the 1975 Oroville, California sequences (1979)
    In:  Bull. Seism. Soc. Am., Washington D.C., Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 69, no. 4, pp. 1027-1038, pp. L09611
    Details
    Publication Date: 1979
    Keywords: Fore-shocks ; Earthquake ; Discrimination ; Earthquake precursor: prediction research ; Spectrum ; Corner frequency ; Seismology ; Body waves ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Subduction of the Nazca plate beneath Peru: Evidence from spatial distribution of earthquakes (1979)
    In:  Geophys. J. R. astr. Soc., Warszawa, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 57, no. 1, pp. 537-555, pp. 2121
    Details
    Publication Date: 1979
    Keywords: Subduction zone ; Seismicity ; Seismology ; South ; America ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Attenuation of P and S waves diffracted around the core (1979)
    In:  Geophys. J. R. astr. Soc., London, Elsevier, vol. 57, no. 8, pp. 353-379, pp. 2083, (ISBN 1-86239-117-3)
    Details
    Publication Date: 1979
    Keywords: earth mantle ; Seismology ; P-waves ; Shear waves ; Q-structure ; Quality factor ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    P and S waves diffracted around the core and the velocity structure at the base of the mantle (1979)
    In:  Geophys. J. R. astr. Soc., London, Elsevier, vol. 57, no. 8, pp. 381-395, pp. 2083, (ISBN 1-86239-117-3)
    Details
    Publication Date: 1979
    Keywords: earth mantle ; Seismology ; P-waves ; Shear waves ; Q-structure ; Quality factor ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    New Zealand and Antarctic seismology (1979)
    In:  Earthquake Information Bulletin, Münster, Amer. Sc., vol. 11, no. 4, pp. 170-174, pp. 1228, (ISBN 0-471-26610-8)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Review article ; Project report/description
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    A moment magnitude scale (1979)
    In:  J. Geophys. Res., Luxembourg, Conseil de l'Europe, vol. 84, no. 7055, pp. 2348-2350, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Magnitude ; Source parameters ; seismic Moment ; Statistical investigations ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 7
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    A semi-empirical approach to prediction of long-period ground motions from great earthquakes (1979)
    In:  Bull. Seism. Soc. Am., Amsterdam, Elsevier Scientific Publishing Company, vol. 69, no. 2, pp. 1645-1670, pp. 2265, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Strong motions ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 8
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    A review of the 1356 Basel earthquake: Basic data (1979)
    In:  Tectonophys., Bonn, 3-4, vol. 53, no. 10, pp. 325-333, pp. L10306, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Earthquake
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    BIBLIOGRAPHY SEISMOLOGY
  • 9
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    The deep structure of the continents (1979)
    In:  Sci. Am., Reykjavík, Icelandic Meteorological Office, Ministry for the Environment University of Iceland, vol. 240 , no. 1, pp. 92-107, pp. TC1011, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Earth model, also for more shallow analyses ! ; Lithosphere ; earth mantle ; SciAm
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    BIBLIOGRAPHY SEISMOLOGY
  • 10
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    A modified form of the Gutenberg-Richter magnitude-frequency relation (1979)
    In:  Bull. Seism. Soc. Am., Kunming, China, 4, vol. 69, no. 4, pp. 1209-1214, pp. L13613, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Magnitude ; Seismology ; Seismicity ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 11
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    Magnitude corrections for attenuation in the upper mantle (1979)
    In:  Geophys. J. R. astr. Soc., Zagreb, 3-4, vol. 57, no. 1, pp. 609-638, pp. B06305, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Attenuation ; Inelastic ; Magnitude ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 12
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    Shear velocity structure in the eastern United States from the inversion of surface-wave group and phase velocities (1979)
    In:  Bull. Seism. Soc. Am., Luxembourg, Conseil de l'Europe, vol. 69, no. 1, pp. 1133-1148, pp. L09610, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Shear waves ; Surface waves ; Phase velocity ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 13
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    Seismic source theory (1979)
    In:  Rev. Geophys. Space Phys., San Francisco, Schweizerbart'sche Verlagsbuchhandlung, vol. 17, no. B10, pp. 328-336, pp. B10404, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publication Date: 1979
    Keywords: Source ; Seismology ; Review article
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    BIBLIOGRAPHY SEISMOLOGY
  • 14
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    Structure under Mount Rainier, Washington, inferred from teleseismic body waves (1979)
    In:  J. Geophys. Res., Basel, Elsevier Science Publishers, vol. 84, no. B9, pp. 4749-4762, pp. L15S20, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Teleseismic events ; Seismology ; Volcanology ; Velocity depth profile ; USA ; Geol. aspects ; Body waves ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 15
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    Comment on "Dispersion function computations for unlimited frequency values" by Anas Abo Zena (1979)
    In:  Geophys. J. R. astr. Soc., Hannover, Conseil de l'Europe, vol. 59, no. 1, pp. 315-323, pp. L24314, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Dispersion ; Frequency ; Seismology ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 16
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    Observations of sPn from Swabian Alb earthquakes at the GRF-Array (1979)
    In:  J. Geophys., Würzburg, Physica-Verlag, vol. 45, no. 1, pp. 337-340, pp. L24313, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: P-waves ; Seismic arrays ; Seismology ; ConvolutionR
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    BIBLIOGRAPHY SEISMOLOGY
  • 17
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    On the relation between seismic moment and stress drop in the presence of stress and strength heterogeneity (1979)
    In:  J. Geophys. Res., San Francisco, Pergamon, vol. 84, no. B5, pp. 2243-2250, pp. B05315, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: seismic Moment ; Stress drop ; Stress ; Strength ; Seismology ; Modelling ; Source parameters ; Inhomogeneity ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 18
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    Magnitude corrections for attenuation in the upper mantle (1979)
    In:  Geophys. J. R. astr. Soc., Zagreb, 3-4, vol. 57, no. 5372, pp. 609-638, pp. B06305, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Attenuation ; Magnitude ; Nuclear explosion ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 19
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    Studies of seismicity and selected focal mechanisms in Switzerland (1979)
    In:  Schweiz. mineral. petrogr. Mitt., Bonn, 3-4, vol. 59, no. 10, pp. 127-132, pp. L10306, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismicity ; Seismology ; Fault plane solution, focal mechanism ; Muller
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    BIBLIOGRAPHY SEISMOLOGY
  • 20
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    Observations relevant to seismic driving stress, stress drop, and efficiency (1979)
    In:  J. Geophys. Res., New York, August, vol. 84, no. 3-4, pp. 2251-2261, pp. 1610, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Stress ; Stress drop ; Energy (of earthquakes) ; Source parameters ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 21
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    An integral equation for dynamic elastic response of an isolated 3-D crack (1979)
    In:  Wave Motion, Tulsa, 3-4, vol. 1, no. 13, pp. 187-192, pp. B10303, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1979
    Keywords: Dislocation ; cracks and fractures (.NE. fracturing) ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 22
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    Aleutian subduction zone seismicity, volcano-trench separation, and their relation to great thrust-type earthquakes (1979)
    In:  J. Geophys. Res., London, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 84, no. 5, pp. 4583-4591, pp. 1013, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1979
    Keywords: Subduction zone ; Seismology ; Seismicity ; Volcanology ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 23
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    On the relation between Modified Mercalli intensity and body-wave magnitude (1979)
    In:  Bull. Seism. Soc. Am., Dordrecht, Martinus Nijhoff Publishers, vol. 69, no. 3, pp. 893-909, pp. L11307, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Intensity ; Magnitude ; BSSA ; body wave Magnitude
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    BIBLIOGRAPHY SEISMOLOGY
  • 24
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    On the observability of isotropic seismic sources: the July 31, 1970 Colombian earthquake (1979)
    In:  Phys. Earth Plan. Interiors, Kyoto, AGU, vol. 18, no. B1, pp. 176-196, pp. L24302, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Earthquake ; PEPI
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    BIBLIOGRAPHY SEISMOLOGY
  • 25
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    An in situ velocity study: the Stone Canyon well (1979)
    In:  J. Geophys. Res., Berlin, Pergamon, vol. 84, no. B2, pp. 672-678, pp. B04306, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Velocity ; Seismology ; Earthquake precursor: prediction research ; Earthquake precursor: Vp/Vs anomalies ; JGR ; Body waves
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    BIBLIOGRAPHY SEISMOLOGY
  • 26
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    Seismic signal detection and parameter estimation (1979)
    In:  Geophys. Prosp., Luxembourg, Conseil de l'Europe, vol. 27, no. 1, pp. 1-15, pp. 1068, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Detectors ; Seismology ; Statistical investigations ; CoherencyE
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    BIBLIOGRAPHY SEISMOLOGY
  • 27
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    Elastic Waves in the Earth (1979)
    Elsevier
    In:  Amsterdam, 490 pp., Elsevier, vol. 11, no. Publ. No. 12, pp. 127, (3-540-43395-3)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Textbook of geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 28
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    Dispersion function computations for unlimited frequency values (1979)
    In:  Geophys. J., vol. 58, no. B11, pp. 91-105
    Details
    Publication Date: 1979
    Keywords: Seismology ; Layers ; Dispersion ; Frequency ; Synthetic seismograms
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    BIBLIOGRAPHY SEISMOLOGY
  • 29
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    Determination of geometric and dynamic focal parameters for some strong intermediate earthquakes in the Vrancea region (1979)
    In:  Rev. Roum. Géol., Géophys. et Géogr. - Géophysique, Münster, 3, vol. 23, no. 3-4, pp. 39-49, pp. L12311, (ISBN 0-471-26610-8)
    Details
    Publication Date: 1979
    Keywords: Source parameters ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe)
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    BIBLIOGRAPHY SEISMOLOGY
  • 30
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    Travel time inversion: A geometrical approach (1979)
    In:  J. Geophys. Res., Berlin, Inst. Electrical & Electronics Engineers, vol. 84, no. 4, pp. 3615-3622, pp. B04307, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1979
    Keywords: Travel time ; Inversion ; Data analysis / ~ processing ; Seismics (controlled source seismology) ; Seismology ; JGR
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  • 31
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    Instantaneous power spectra (1979)
    Naval Ocean Systems Center
    In:  report, San Diego, Naval Ocean Systems Center, vol. 1, no. paper SPWLA 90-C, pp. M1-M4, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismics (controlled source seismology) ; Power spectrum ; Spectrum
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    BIBLIOGRAPHY SEISMOLOGY
  • 32
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    Spektralanalyse seismischer Wellen zur Beschreibung des Scherbruches bei den Erdbeben in Friaul (1979)
    Inst. f. Geophys., Univ. Stuttgart
    In:  Diplomarbeit, Granada, 10-12 June 1999, Inst. f. Geophys., Univ. Stuttgart, vol. 339-350, no. 32, pp. 103-108, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Spectral analysis ; Spectrum ; Earthquake ; Seismology ; Fracture
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    BIBLIOGRAPHY SEISMOLOGY
  • 33
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    Numerical modeling of transient wave fields in seismology and seismic prospecting (1979)
    In:  Preprint, Novosibirsk, Air Force Geophysics Laboratory, no. AFGL-TR-87-0230, pp. 103-155
    Details
    Publication Date: 1979
    Keywords: Modelling ; Seismology ; Seismics (controlled source seismology) ; Wave propagation
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    BIBLIOGRAPHY SEISMOLOGY
  • 34
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    Dynamic Green's functions for layered media and application to boundary-value problem (1979)
    Univ. Calif.
    In:  Ph.D. Thesis, San Diego, Univ. Calif., vol. 11, no. PEER Utilities Pgm. Rep. 2000/17, 24 pp., pp. 207
    Details
    Publication Date: 1979
    Keywords: Modelling ; Layers ; Synthetic seismograms ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 35
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    Geologische Erdbebenphänomene im Gefolge von Nuklear- und Molecularexplosionen (1979)
    Forschungsinstitut für militärische Bautechnik
    In:  report, Zürich, Forschungsinstitut für militärische Bautechnik, vol. 10, no. FMB 79.10, pp. 2985-3018
    Details
    Publication Date: 1979
    Keywords: Nuclear explosion ; Seismology ; Buechi ; Buchi
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    BIBLIOGRAPHY SEISMOLOGY
  • 36
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    Eine anormale Geschwindigkeitsstruktur im oberen Erdmantel unter den Ostalpen, abgeleitet aus teleseismischen Laufzeit Residuen der Stationen Schlegeis und Gräfenberg (1979)
    Ludwig-Maximilians-Universität
    In:  Diplomarbeit, München, Ludwig-Maximilians-Universität, vol. 10, no. 28, pp. 309-314
    Details
    Publication Date: 1979
    Keywords: Teleseismic events ; Velocity analysis ; earth mantle ; Seismology ; Bruestle ; Brustle
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    BIBLIOGRAPHY SEISMOLOGY
  • 37
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    Fault plane solutions using relative amplitudes of P and surface reflections: further studies (1979)
    In:  Geophys. J. R. astr. Soc., Basle, Wiley, vol. 60, no. 5441, pp. 459-487, pp. 1264, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Source ; Seismology ; Fault plane solution, focal mechanism ; GJRaS
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  • 38
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    Die Anwendung von Vorhersagefiltern zur Ereigniserkennung bei digitalen Breitbandseismogrammen (1979)
    Bundesanstalt f. Geowissenschaften und Rohstoffe
    In:  Hannover, Bundesanstalt f. Geowissenschaften und Rohstoffe, vol. 25, no. Publ. No. 12, pp. 95-104, (ISBN: 0-08-043930-6)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Detectors ; Filter- ; Broad-band
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  • 39
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    Erdbeben (1979)
    Hallwag
    In:  Stuttgart, Hallwag, vol. 30, no. Publ. No. 12, pp. 95-104, (ISBN 0-865-42078-5)
    Details
    Publication Date: 1979
    Keywords: Earthquake ; Seismology ; Textbook of geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 40
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    CEDAR: An approach to the computer automation of short period local seismic networks (1979)
    Caltech
    In:  Ph.D. Thesis, Pasadena, CA., Caltech, vol. C 560, 183 pp., no. PL-TR-91-2212(I), pp. 79-84, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Detectors ; sta ; Seismology ; Seismic networks ; High frequency ...
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  • 41
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    A first order scattering solution for modeling elastic wave codas. Part 1. The acoustic case (1979)
    In:  Preprint, Beijing, Halliburton Logging Services, vol. C 560, 183 pp., no. PL-TR-91-2212(II), pp. 938-939, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismics (controlled source seismology) ; Scattering ; Coda (waves, ~ of seismograms) ; Wave propagation ; Acoustics
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    BIBLIOGRAPHY SEISMOLOGY
  • 42
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    Die Bestimmung der seismischen Wellenenergie im Zeitbereich unter Verwendung der digitalen Registrierungen des Seismologischen Zentralobservatoriums Gräfenberg (1979)
    Inst. f. Meteorol. und Geophys., Goethe Univ. Frankfurt
    In:  Diplomarbeit, Roma, Inst. f. Meteorol. und Geophys., Goethe Univ. Frankfurt, vol. C 560, 183 pp., no. 78 (?), pp. 193-210, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismic arrays ; Data analysis / ~ processing ; Energy (of earthquakes)
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  • 43
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    Deep structure of the Earth's crust and upper mantle in the USSR according to geophysical and seismological data (1979)
    Lawrence Livermore National Laboratory
    In:  rept., Livermore, Calif., Lawrence Livermore National Laboratory, vol. 10, no. UCID-18099, pp. 1358-1361, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Review article ; Deep seismic sounding (espec. cont. crust) ; CRUST ; earth mantle ; Seismology ; EUROPROBE (Geol. and Geophys. in eastern Europe)
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  • 44
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    Crustal structure of the western United States (1979)
    U. S. Geol. Surv.
    In:  Prof. Paper, Menlo Park, California, U. S. Geol. Surv., vol. 1034, no. 77-3, pp. 1-74, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Deep seismic sounding (espec. cont. crust) ; Velocity depth profile ; USGS ; USA ; Seismics (controlled source seismology) ; Seismology
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  • 45
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    Surface wave focal mechanisms for eastern North American earthquakes with tectonic implications (1979)
    In:  J. Geophys. Res., Zagreb, Conseil de l'Europe, vol. 84, no. 4, pp. 3543-3552, pp. L02307, (ISSN 0343-5164)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Fault plane solution, focal mechanism ; Surface waves ; Tectonics ; Source ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 46
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    SH-wave generation by dislocation sources - A numerical study (1979)
    In:  Bull. Seism. Soc. Am., Zagreb, Conseil de l'Europe, vol. 69, no. 4, pp. 1-15, pp. L02307, (ISSN 0343-5164)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Dislocation ; SH waves ; Source ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 47
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    Determination of the seismic design parameters: a stochastic approach (1979)
    Stanford University, California
    In:  Ph.D. Thesis, La Jolla, CA, Stanford University, California, vol. 1034, no. 77-767, pp. 293-297, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Seismology ; Seismic networks ; Seismic arrays ; Statistical investigations
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    BIBLIOGRAPHY SEISMOLOGY
  • 48
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    HYPOELLIPSE - A computer program for determining local earthquake hypocentral parameters, magnitude, and first motion pattern (1979)
    U. S. Geol. Surv.
    In:  Open-File Report, Houston, U. S. Geol. Surv., vol. C 560, 183 pp., no. 79-431, pp. 1-57, (ISBN 3-933346-037)
    Details
    Publication Date: 1979
    Keywords: Source parameters ; Seismology ; Magnitude ; Hypocentral depth ; Location ; software ; USGS
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    Manual of seismological observatory practice (1979)
    NOAA, U. S. Department of Commerce
    In:  report, Houston, NOAA, U. S. Department of Commerce, vol. 10, no. SE-20, pp. 206-209, (ISBN 0 08 042822 3)
    Details
    Publication Date: 1979
    Keywords: Handbook of geophysics ; Seismology ; Instruments ; BIBTEX?
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  • 50
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    Soviet short-term forecasts of active region evolution and flare activity (1979)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: The structure and strength of the magnetic fields of the Sun's active regions were studied to obtain information for short term forecasting. Intensity forecasts were then made using the information obtained on the gradients of the magnetic fields between sunspots of opposite polarity. A comparison of flare forecasting methods is presented.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 72-88
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    Metallurgical processing (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: The metallurgical processing experiments on Skylab were chosen to: (1) elucidate the unknown effects of a low gravity environment on certain processes; (2) determine to what extent nongravitational driven flows operate in the processes; and (3) explore the possibilities of containerless solidification. Welding and brazing experiments were conducted to provide an understanding of solidification mechanics in a weightless environment.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 37 p
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  • 52
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    Early space experiments in materials processing: Future programs (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: A list of the present state of knowledge in materials processing is presented. The fluid behavior in a low gravity environment is summarized. Materials processing in the Space Transportation System facility is discussed. Prospects for space commercialization are reported.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 16 p
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  • 53
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    Post-Skylab activities (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: The Apollo Soyuz Test Program is described. A modification of the Skylab furnace was developed for the ASTP mission that had a maximum temperature of 1200 C, a programmed cool down to give more uniform growth rates, and a He quench system to shorten the time required to reach allowable touch temperature. The Space Processing Applications Rocket (SPAR) program was initiated to provide some continuity in flight experimentation. Liquid mixing, immiscible alloy solidification, composite materials, bubbles and dispersed particles during solidification, and containerless processing techniques were studied in the SPAR program.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 45 p
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  • 54
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    Fluid behavior in low g (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: Several experiments and a number of demonstrations were performed during Skylab to elucidate the behavior of fluids in space. The purposes of these experiments were to confirm hypotheses on how systems would behave in a low-g environment, determine to what extent residual accelerations and nongravity-driven convection affected processes, and provide graphic demonstrations of fluid behavior in space for classroom use and to stimulate new ideas for low-g research.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 33 p
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  • 55
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    Possible applications of space processing (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: Numerous applications take advantage of low gravity. These range from research, such as study of basic properties of materials or developing a better understanding of various processes and how they might be controlled, to actual production of unique materials, either in very limited quantities for research purposes to serve as paradigms for determining the limiting results of processes in which gravity effects are removed, or in large quantities, to fill certain high technology needs that cannot be met by other means. Examples of these are given in the following topics discussed: (1) crystal growth; (2) metals, alloys and composite materials (metallurgy); (3) glass and ceramics (containerless processing); (4) fluid and chemical processes; and (5) processing of biological materials.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 60 p
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  • 56
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    The evolution of apparatus for materials processing on Skylab (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: The following topics are discussed: (1) the inception of space processing; (2) earth-based experimental activities prior to Skylab (drop tower and research aircraft experiments); (3) preliminary experiments in space (Apollo and sounding rocket experiments); and (4) Skylab experimental facilities. Apparatus for contained materials processing; for brazing in space; and containerless processing are presented and discussed. The Skylab materials processing system and miscellaneous design considerations are also discussed.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 48 p
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  • 57
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    NASA workshop on outgassing (1979)
    In:  CASI
    Details
    Publication Date: 2006-06-20
    Description: The materials and processing constraints that are involved in the construction of a molecular wake shield for the shuttle orbiter are discussed. Stainless steel, having outgassing rates less than the required 10 to the minus 12th power Torr-liters/sq cm per second was the primary material suggested for the construction of the shield.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Proc. of Workshops to Define Eng. Requirements for a Space Vacuum Res. Facility; 17 p
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  • 58
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    Report of the Ad Hoc Committee on the assessment of models of a wake shield environment around various spacecraft, Universities Space Research Association (1979)
    In:  CASI
    Details
    Publication Date: 2006-06-20
    Description: Models depicting the ambient atmosphere which can overtake the spacecraft vacuum shield are presented. The subject areas discussed are: possible changing effects on the wake shield environment; possible utilization of the induced environmental contamination monitor; present state of the knowledge of the parameters used to describe the intermolecular collisions; the possibility of using simple models to describe the wake shield environment; possible errors associated with using kinetic theory to calculate that part of the atmosphere overtaking the shield; and a general assessment of the Monte Carlo techniques used to calculate the shield environment.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Marshall Space Flight Center Proc. of Workshops to Define Eng. Requirements for a Space Vacuum Res. Facility; 6 p
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  • 59
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    Proceedings of workshops to define engineering requirements for a space vacuum research Facility: Summary (1979)
    In:  CASI
    Details
    Publication Date: 2006-06-20
    Description: Models depicting the collision dynamics in the near vicinity of a body orbiting in the upper atmosphere were studied to investigate degassing techniques for a vacuum facility.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Proc. of Workshops to Define Eng. Requirements for a Space Vacuum Res. Facility; 3 p
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  • 60
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    MSFC solar activity predictions for satellite orbital lifetime estimation (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The procedure to predict solar activity indexes for use in upper atmosphere density models is given together with an example of the performance. The prediction procedure employs a least square linear regression model to generate the predicted smoothed vinculum R sub 13 and geomagnetic vinculum A sub p(13) values. Linear regression equations are then employed to compute corresponding vinculum F sub 10.7(13) solar flux values from the predicted vinculum R sub 13 values. The output is issued principally for satellite orbital lifetime estimations.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 378-384
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  • 61
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    Coronal holes inferred from the Fleurs East-West solar scans (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: East-West solar scans produced daily on 692 and 1415 MHz are analyzed for the period 1968 to 1973. The analysis confirms that coronal holes are stable features displaying significantly reduced electromagnetic emission which can persist for many solar rotations. The coronal hole observations are summarized in a series of tables.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 288-311
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  • 62
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    A review of short-term flare forecasting activities at Toyokawa (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Short-term forecasting of solar activity conducted at Toyokawa is briefly reviewed. The forecasts are based on microwave observations of the slowly varying component of solar radiation associated with active regions. It was found that for proton flares which take place in intense active regions, it is possible to predict their occurrence with certain accuracy, but for a certain class of proton flares which occur in a small active region or which are associated with an active region, which evolves very rapidly, or for whose which occur behind the limb, it is almost impossible to forecast their occurrence.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 205-211
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  • 63
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    Solar activity predictions at Peking Observatory (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Solar activity prediction procedures used at the Peking Observatory are briefly reviewed. Methods for short term prediction of solar proton events and the results for proton events of importance greater than 1 during the period 1974-1977 are given in detail. The characteristic values of solar cycle 21 are predicted.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 154-162
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  • 64
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    Forecasting of solar energetic radiation at the forecast center of the Institute of Applied Geophysics (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Solar energetic radiation forecasting techniques are described. The factors that are used as the basis for the forecasts are discussed.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 89-103
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  • 65
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    Platforms in space: Evolutionary trends (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The problem of physical crowding and the proliferation of separate communication links and ground support systems for multiple free-flying satellites can be overcome by using space platforms and multiplexing the data streams. Pertinent features of the space shuttle orbiter payloads, the solar power satellite, and geostationary and geosynchronous platforms are discussed. Typical payload requirements data which are needed to allow meaningful study of payloads as candidates for platform implementation are cited and factors affecting the compatibility/grouping of payloads are outlined.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Proc.: Workshop on the Need for Lightning Observations from Space; p 159-182
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  • 66
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    Extraction processes for the production of aluminum, titanium, iron, magnesium, and oxygen and nonterrestrial sources (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The suitability of existing terrestrial extractive metallurgical processes for the production of Al, Ti, Fe, Mg, and O2 from nonterrestrial resources is examined from both thermodynamic and kinetic points of view. Carbochlorination of lunar anorthite concentrate in conjunction with Alcoa electrolysis process for Al; carbochlorination of lunar ilmenite concentrate followed by Ca reduction of TiO2; and subsequent reduction of Fe2O3 by H2 for Ti and Fe, respectively, are suggested. Silicothermic reduction of olivine concentrate was found to be attractive for the extraction of Mg becaue of the technological knowhow of the process. Aluminothermic reduction of olivine is the other possible alternative for the production of magnesium. The large quantities of carbon monoxide generated in the metal extraction processes can be used to recover carbon and oxygen by a combination of the following methods: (1) simple disproportionation of CO,(2) methanation of CO and electrolysis of H2O, and (3) solid-state electrolysis of gas mixtures containing CO, CO2, and H2O. The research needed for the adoption of earth-based extraction processes for lunar and asteroidal minerals is outlined.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Ames Res. Center Space Resources and Space Settlements; p 257-274
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    The initial lunar supply base (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The first lunar supply base should have a mass less than 1000 tons, be deployed by 24 persons in 4 months, and be maintained by 10 persons. Output could be expanded 20 times in 5 years to 600,000 tons/yr by a factor of 10 expansion of the area of the solar array on the lunar surface, using low power soil beneficiation, increasing the fleet of mining vehicles, and illuminating the base continuously at night with lunar orbiting mirrors. The space manufacturing facility (SMF) will supply most of the mass (solar cells and orbiting mirrors) necessary for expansion. Several devices and procedures are suggested for development which could further reduce the total mass necessary to transport to the Moon to establish the initial lunar supply base.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Ames Res. Center. Space Resources and Space Settlements; p 207-224
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  • 68
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    Solar forecast and real-time monitoring needs of the Study of Energy Release in Flares (SERF) (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Complementary, simultaneous observations of flares from as many observatories, both ground based and orbiting, as possible planned for the Solar Maximum Year are considered. The need for forecasts of solar activity on long term, one week, and two day intervals is described. Real time reporting is not needed, but daily summaries of activity and permanent records are important.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 331-339
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  • 69
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    The variability of the solar ultraviolet spectral irradiances (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Available data on the solar spectral irradiances at wavelengths below 3100 A are extremely limited and there are major uncertainties in many of the measurements. In particular, there is major disagreement on the magnitude of the variability of the spectral irradiances over the solar cycle. The effects of different solar features on the ultraviolet spectral irradiances over both the 28 day solar rotation period and over the solar cycle are discussed. It is proposed that any attempt to predict the magnitudes of the ultraviolet spectral irradiances must take into account a long term variability of emission from quiet regions of the solar disk over the solar cycle. The need for direct long term monitoring of the ultraviolet spectral irradiances is emphasized.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 280-321
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  • 70
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    A new method of very long-term prediction of solar activity (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A method of solar activity prediction based on the statistical relationship between the minimum value of geomagnetic activity in each 11 year cycle and the height of the next sunspot cycle is proposed. The method is applied to predict sunspot cycle 21.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 258-263
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  • 71
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    The needs for prediction and real-time monitoring for the flare build-up study (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Similarities between plasma instabilities occurring in the magnetospheric tail and in active regions on the Sun are discussed. Intense observations of the flare build-up processes on the Sun planned for May and June 1980 as a part of the Solar Maximum Year are described.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 322-330
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  • 72
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    New methods for predicting the magnitude of sunspot maximum (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Three new and independent methods of predicting the magnitude of a forthcoming sunspot maximum are suggested. The longest lead time is given by the first method, which is based on a terrestrial parameter measured during the declining phase of the preceding cycle. The second method, with only a slightly shorter foreknowledge, is based on an interplanetary parameter derived around the commencement of the cycle in question (sunspot minimum). The third method, giving the shortest prediction lead-time, is based entirely on solar parameters measured during the initial progress of the cycle in question. Application of all three methods to forecast the magnitude of the next maximum (Cycle 21) agree in predicting that it is likely to be very similar to that of Cycle 18.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 264-279
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  • 73
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    Long-term solar activity predictions (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The need for long term solar activity predictions is addressed. The spatial organization of solar activity is described including applications for predictions, and ancient evidence for solar variability. Methods of predicting sunspot numbers are discussed. The inherent accuracy of the methods varies considerably, but a typical error bar 20%. The accuracy of sunspot cycle predictions is considered along with long term predictions of great solar events.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 246-257
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    Very large geomagnetic disturbance during sunspot cycle 21: A prediction (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Evidence is presented which suggests that very large geomagnetic disturbances (350 gammas or greater at an invariant magnetic latitude of 50 degrees) occur once or twice per sunspot cycle, on the average. There is also some tendency for these disturbances to group in large odd numbered sunspot cycles similar to the current cycle, cycle 21. No such disturbance was noted during the past cycle although a series of major solar flares was observed in August 1972. At least one very large geomagnetic disturbance is expected during the current cycle; a prediction with perhaps serious consequences for electric power companies.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 193-197
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    Solar-induced variations of environment affecting manned space flight and spacecraft operations (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Estimates of short and long term solar activity are required for calculating variations in the environment with regard to spacecraft charging, radiation effects, and orbital lifetime. Correlations appear to exist between the time of solar activity and the time of operational anomalies due to electrical discharges when the dielectric surfaces of geosynchronous spacecraft are charged by interaction with the ambient plasma to levels above breakdown voltage. An ability to predict the solar induced variation variability of the plasmas could permit refinement of design criteria. The influence of the radiation on spacecraft materials, systems, and manned operations is summarized. Solar radition effects on the orbital altitude atmospheric density environment and spacecraft lifetimes are also considered.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Solar-Terrest. Predictions Proc., Vol. 2; p 89-103
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    User requirements of solar-terrestrial predictions for spacecraft applications (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Areas which are influenced by solar-terrestrial coupling effects and which are internal to the Earth's magnetosphere are of interest to mission planners, spacecraft hardware designers, and those engaged in the operation of already orbiting manned or unmanned spacecraft. Accurate models are needed to predict energetic particle flux density, interactions between low energy (10 eV to 100 eV) near-Earth plasma and space systems, and neutral atmospheres. Parameters required for each of these areas are discussed.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 1-20
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    PPS76: A computerized event mode solar proton forecasting technique (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A procedure was developed to generate a computerized time intensity profile of the solar proton intensity expected at the Earth after the occurrence of a significant solar flares on the Sun. A combination of many pieces of independent research and theoretical results are included. A construction of selected experimental and theoretical results from the entire domain of solar terrestrial physics is given.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 406-427
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  • 78
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    Short-term solar activity forecasting (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A method of forecasting the level of activity of every active region on the surface of the Sun within one to three days is proposed in order to estimate the possibility of the occurrence of ionospheric disturbances and proton events. The forecasting method is a probability process based on statistics. In many of the cases, the accuracy in predicting the short term solar activity was in the range of 70%, although there were many false alarms.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 176-181
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  • 79
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    Spiral sunspots and solar activity forecasts (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The definition of a spiral sunspot is given. Three examples are described which illustrate the processes of the occurrence of spiral sunspots and the roles played by them in prominence and flare activities. A method for solar activity forecasts is then proposed making use of parameters such as spiral sunspots, prominences and neutral lines.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 140-153
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  • 80
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    Long-term forecasting of solar activity (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Corrections to the forecast of the basic parameters of the 21st cycle are described. Estimates about the level of solar activity in the 22nd cycle are presented.
    Keywords: SOLAR PHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 163-175
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    Extraterrestrial fiberglass production using solar energy (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: A conceptual design is presented for fiberglass production systems in both lunar and space environments. The raw material, of lunar origin, will be plagioclase concentrate, high silica content slag, and calcium oxide. Glass will be melted by solar energy. The multifurnace in the lunar plant and the spinning cylinder in the space plant are unique design features. Furnace design appears to be the most critical element in optimizing system performance. A conservative estimate of the total power generated by solar concentrators is 1880 kW; the mass of both plants is 120 tons. The systems will reproduce about 90 times their total mass in fiberglass in 1 year. A new design concept would be necessary if glass rods were produced in space.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA. Ames Res. Center Space Resources and Space Settlements; p 225-232
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  • 82
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    The processing of semiconductor materials (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: Five experiments involving the processing of semiconductor materials were performed during the Skylab mission. After discussions on semiconductors and their unique electronic properties, and techniques of crystal growth, these five experiments are presented. Four melt growth experiments were attempted: (1) steady state growth and segregation under zero gravity (InSb); (2) seeded, containerless solidification of InSb; (3) influence of gravity-free solidification on microsegregation; and (4) directional solidification of InSb-GaSb alloys. One vapor growth experiment, crystal growth by vapor transport, was attempted.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 45 p
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  • 83
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    The promise of space processing (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-06
    Description: The long exposure to a virtually zero-gravity environment is a truly unique situation that cannot be duplicated or even approximated for any length of time on earth. The topics discussed are: (1) low gravity; (2) atmospheric effects; (3) potential advantages of materials processing in space; (4) the absence of buoyancy-driven convection; (5) the absence of hydrostatic pressure; (6) the absence of sedimentation and buoyancy; (7) containerless processing; and (8) ultrahigh vacuum processing.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Early Space Expt. in Mater. Process.; 37 p
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  • 84
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    Future exploration of the asteroids (1979)
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    Publication Date: 2011-08-17
    Description: Future possibilities for the further study of the asteroids are reviewed, with particular attention paid to space missions for their direct exploration. The role of traditional ground-based and earth orbiting techniques is examined briefly, and it is concluded that although astronomical techniques are presently at their peak, and despite the opportunities provided by the Infrared Astronomical satellite, the Space Telescope and Spacelab Infrared Telescope Facility, the next major step will require direct exploration by space probes to obtain information on asteroid surface chemistry, geology and bulk properties. Various mission modes and propulsion systems for a first multi-target asteroid mission are discussed, including flyby, rendezvous, landing and sample return, and ion-drive propulsion systems. Science payloads for a basic rendezvous mission are considered, and target selection for multi-asteroid flyby tours and rendezvous tours is discussed. Consideration is also given to sample return missions for the evaluation of the asteroid as potential resources.
    Keywords: ASTRONAUTICS (GENERAL)
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  • 85
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    New atomic data of O/2+/ (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: New atomic data are tabulated for the ion O(2+). Collision strengths are calculated for several energies of the exciting electron. The populations of the levels of O(2+) are calculated as a function of electron density under conditions appropriate for the solar atmosphere. The available solar data are compared with theoretical predictions of relative line intensities.
    Keywords: SOLAR PHYSICS
    Type: Astronomy and Astrophysics; 76; 3, Ju; July 197
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  • 86
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    Magnetic dips in the solar wind (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Using magnetic data from the Helios-1 fluxgate magnetometer, with a 0.2 s resolution, we have investigated the structure of several interplanetary discontinuities involving magnetic dips and rotations of the magnetic field vector. A minimum variance analysis illustrates the behaviour of the magnetic field through the transition. Using this analysis, quite different structures have been isolated and, in particular, narrow transitions resembling almost one dimensional reconnected neutral sheets. For the thinner cases (scale lengths of the magnetic rotation of the order or smaller than 1000 km), we find that the observed structures can be the nonlinear effect of a resistive tearing mode instability having developed on an originally one dimensional neutral sheet at the solar corona.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 62; May 1979
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  • 87
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    Solar wind heavy ions from flare-heated coronal plasma (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Information concerning the coronal expansion is carried by solar-wind heavy ions. Distinctly different energy-per-charge ion spectra are found in two classes of solar wind having the low kinetic temperatures necessary for E/q resolution of the ion species. Heavy-ion spectra which can be resolved are most frequently observed in the low-speed interstream (IS) plasma found between high speed streams; the streams are thought to originate from coronal holes. Although the sources of the IS plasma are uncertain, the heavy-ion spectra found there contain identifiable peaks of O, Si, and Fe ions. Such spectra indicate that the IS ionization state of O is established in coronal gas at a temperature of approximately 1.6 million K, while that of Fe is frozen in farther out at about 1.5 million K. On occasion anomalous spectra are found outside IS flows in solar wind with abnormally depressed local kinetic temperatures. The anomalous spectra contain Fe(16+) ions, not usually found in IS flows, and the derived coronal freezing-in temperatures are significantly higher. The coronal sources of some of these ionizationally hot flows are identified as solar flares.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 62; May 1979
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  • 88
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    Gravitational influences on the liquid-state homogenization and solidification of aluminum antimonide (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Typical commercial or laboratory-prepared samples of polycrystalline AlSb contain microstructural inhomogeneities of Al- or Sb-rich phases in addition to the primary AlSb grains. The paper reports on gravitational influences, such as density-driven convection or sedimentation, that cause microscopic phase separation and nonequilibrium conditions to exist in earth-based melts of AlSb. A triple-cavity electric furnace is used to homogenize the multiphase AlSb samples in space and on earth. A comparative characterization of identically processed low- and one-gravity samples of commercial AlSb reveals major improvements in the homogeneity of the low-gravity homogenized material.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Metallurgical Transactions A - Physical Metallurgy and Materials Science; 10A; May 1979
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  • 89
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    Hydromagnetic waves and turbulence in the solar wind (1979)
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    Publication Date: 2011-08-17
    Description: The paper presents a state-of-the-art review of interplanetary fluctuations, their origins, and their effects on the solar wind. Typical values of parameters to waves and turbulence in the solar wind are examined, along with a classification of large-amplitude waves. Cases where description by the MHD theory is qualitatively correct and where it can be misleading are noted. An attempt is made to state rigorously the essential points of hydromagnetic-wave theory and to identify areas in which theoretical research needs to be extended. The review covers the observed hydromagnetic fluctuations, their interpretation in terms of current theory, and the degree of closure between observation and theory. The spatial distribution and origins of waves in the solar wind are discussed.
    Keywords: SOLAR PHYSICS
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  • 90
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    Coronal hole boundary brightness in lambda 284 of Fe XV (1979)
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    Publication Date: 2011-08-17
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 62; June 197
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  • 91
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    NASA's search for the solar connection. I (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: NASA's solar research, which leans toward the study of the sun as a star, is surveyed. The Orbiting Solar Observatory (OSO) program is covered, which yielded data such as spectras of 140-400 A wavelength of the entire solar disk. Attention is also given to the results obtained by Skylab, such as data showing that whenever a large coronal hole exists near the sun's equator, a stream of high-speed solar wind will be observed at the earth. Finally areas of future research, such as a concerted study of flare phenomenon, are discussed.
    Keywords: SOLAR PHYSICS
    Type: Sky and Telescope; 58; Aug. 197
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  • 92
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    The source of electrostatic fluctuations in the solar-wind (1979)
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    Publication Date: 2011-08-17
    Description: Solar wind electron and ion distribution functions measured simultaneously with or close to times of intense electrostatic fluctuations are subjected to a linear Vlasov stability analysis. Although all distributions tested were found to be stable, the analysis suggests that the ion beam instability is the most likely source of the fluctuations.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research; 84; May 1
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  • 93
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    A graphical summary of solar wind electron content observations by Pioneer 6, 8, and 9 (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Between 1965 and 1972, solar wind density measurements were obtained by Mariner 5 and Pioneer 6, 7, 8, and 9 using a radio science method called the 'dual-frequency experiment'. The measurements and data processing are now terminated. A graphical summary is presented of the best of the resulting data, showing the average electron number density of the solar wind across radio paths that vary in length up to 1.8 AU and that lie broadside to the flow direction. These graphs summarize 3.4 years of observations with a time resolution of 1 hour; the measurements provided 1-min resolution and spanned 7 years. Because the orientation and length of the paths change continually and have a major influence on the interpretation of these data, a spacecraft trajectory chart and a plot of the corotation interval are provided.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research; 84; Feb. 1
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  • 94
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    The N III and O IV intersystem multiplets as density indicators for solar plasmas (1979)
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    Publication Date: 2011-08-17
    Description: The usefulness of the relative intensities of lines within the N III intersystem multiplet near 1750 A as an electron density indicator for solar plasmas is discussed. Although the relative intensities of lines in the multiplet are density sensitive, the intensity ratios should at present be used with caution. Errors of the order of 20% in transition probabilities and excitation rate coefficients can lead to order of magnitude errors in density determinations. It is demonstrated that the intensity ratio of one of the N III intersystem lines and an allowed line from a different ion may also be used as a density indicator in the 10 to the 9th to 10 to the 11th per cu cm regime.
    Keywords: SOLAR PHYSICS
    Type: Astronomy and Astrophysics; 79; 3, No; Nov. 197
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  • 95
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    The use of the German V-2 in US for upper atmosphere research (1979)
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    Publication Date: 2011-08-17
    Description: Early U.S. space experiments involving the liquid propellant German V-2 are discussed. Although the primary objective of the experiments conducted under project Hermes after World War II was initially the development of missile technology, scientific objectives were soon given the priority. The missile was modified for scientific experiments and the payload increased from 6.8% to 47% between 1946 and 1949. Among other instruments, the payload included a cosmic ray telescope, ionosphere transmitter and spectrograph for solar spectral measurements. While the scientific success of the program established a positive public attitude towards space research, the Upper Atmosphere Research Panel, formed to coordinate the project, set a pattern for future scientific advisory bodies.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: vol. 32; Dec. 197
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  • 96
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    Long-term solar wind electron variations between 1971 and 1978 (1979)
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    Publication Date: 2011-08-17
    Description: Imp solar wind electron data measured between 1971 and 1978 were studied with the aim of determining long-term variations near the earth. Two separate sets of parameter variations were observed: (1) in 1976-1977 the solar wind density, the electron temperature, and the interplanetary electrostatic potential were all enhanced, and (2) the halo density and associated electron parameters were all depressed during a 1 1/2-year period centered on the last 6 months of 1976. Although interpretation of these results in terms of corresponding coronal and interplanetary variations is not unique, it may be significant that measured solar wind parameters near the minimum of solar cycle 20 agree better with the Hartle-Sturrock model of the coronal expansion than they do during other epochs.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research; 84; Dec. 1
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  • 97
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    The Fe XXI lambda1354 line in solar flares observed from Skylab and its implications on ionization equilibrium calculations (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Keywords: SOLAR PHYSICS
    Type: Astrophysical Journal; vol. 233
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  • 98
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    EUV limb spectra of a surge observed from Skylab (1979)
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    Publication Date: 2011-08-17
    Description: The EUV spectra of a surge observed at plus 8 in. and plus 20 in. above the white light limb from Skylab are examined. The shape of the differential emission measure determined at 8 in. and 20 in. is nearly the same as for a quiet Sun spectrum at 8 in., but the emission measure of the surge at 8 in. is about an order of magnitude greater than for the quiet Sun. At 20 in. the emission measure of the surge is initially close to the quiet Sun distribution, but decreases by a factor of 4 within 6 min. The optically thin lines formed near 10 to the 5th power K show nonthermal broadening at 8 in., and electron densities near this temperature are derived from intersystem to resonance ratios. The volume of the emitting plasma at 8 in. above the limb was determined, concluding that a continuous energy input is required to explain the observations.
    Keywords: SOLAR PHYSICS
    Type: Astronomy and Astrophysics; 78; 3, Oc; Oct. 197
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  • 99
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    New atomic data for Si/6+/, S/8+/ and Ar/10+/ (1979)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: The paper gives new atomic data, populations of excited levels, and line intensity ratios for the ions Si VII, S IX, and Ar XI of the O I isoelectronic sequence. Ten levels are included in the calculations, i.e., the levels of the 2s/2/2p/4/ and 2s2p/5/ and 2p/6/ configurations. It is noted that the calculations are done for applications to solar plasmas. The line ratios (2s/2/2p/4/3P1 - 2s2p/5/3P0) / (2s/2/2p/4/3P1 - 2s2p/5/3P1) and (2s/2/2p/4/1D2 - 2s2p/5/1P/1/) / (2s/2/2p/4/3P/1/ - 2s1p/5/3P/1/) are two of the ratios useful for electron density determination. Finally, density sensitive line ratios of Ca XIII and Fe XIX are also discussed.
    Keywords: SOLAR PHYSICS
    Type: Astronomy and Astrophysics; 80; 1, No; Nov. 197
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  • 100
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    Principal component analysis of solar flares in the soft X-ray flux (1979)
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    Publication Date: 2011-08-17
    Description: The paper considers principal component analysis of solar flares in the soft X-ray flux, a technique for extracting the salient features from a mass of data. The method applies particularly to the analysis of nonstationary ensembles, and its computations require the evaluation of eigenvalues of matrices. The Eispack matrix eigen system routines were used to analyze full-disk proportional-counter data from the X-ray event analyzer which was part of the Skylab experiment. Empirical orthogonal functions were derived for events in the soft X-ray spectrum between 2.5 and 20 A during different time periods, indicating that about 90% of the cumulative power of each analyzed flare is contained in the largest eigenvector. The first two largest eigenvectors are sufficient for an empirical curve fit through the raw data and a characterization of solar flares in the soft X-ray flux, and power spectra of two largest eigenvectors reveal a reported periodicity of about 5 min.
    Keywords: SOLAR PHYSICS
    Type: Astronomy and Astrophysics; 80; 2, De; Dec. 197
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