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  • 1975-1979  (1.132)
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  • 1
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    Pulse distortion and Hilbert transformation in multiply reflected and refracted body waves (1975)
    In:  Bull. Seism. Soc. Am., Taipei, Elsevier, vol. 65, no. 1, pp. 55-70, pp. TC1002, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Waves ; caustics ; Synthetic seismograms ; Hilbert transform ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 2
    facet.materialart.
    Unbekannt
    The solution of theoretical seismic problems by best rational function approximations for Laplace Transform Inversion (1975)
    In:  Bull. Seism. Soc. Am., Kunming, China, 4, vol. 65, no. 1-3, pp. 927-935, pp. L13613, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismics (controlled source seismology) ; Inversion ; Transformations ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 3
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    Unbekannt
    Conversion of Sn to Lg at a continental margin (1975)
    In:  Bull. Seism. Soc. Am., Amsterdam, Schweizerbart'sche Verlagsbuchhandlung, vol. 65, no. 5652, pp. 235-244, pp. L12S09, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Lg-waves ; CRUST ; Shear waves ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 4
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    Unbekannt
    Dynamics of an expanding circular fault (1976)
    In:  Bull. Seism. Soc. Am., San Francisco, Pergamon, vol. 66, no. 5496, pp. 639-666, pp. B05315, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): SModelling ; Source mechanics ; Source ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 5
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    Unbekannt
    Theoretical basis of some empirical relations in seismology (1975)
    In:  Bull. Seism. Soc. Am., Tokyo, Tokyo University, vol. 65, no. 9, pp. 1073-1096, pp. 2265, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Earthquake ; Seismology ; Source parameters ; Source ; Magnitude ; seismic Moment ; BSSA ; FROTH ; (abstract)
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 6
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    Unbekannt
    An analysis of tidal strain observations from the United States of America II. The inhomogeneous tide (1976)
    In:  Bull. Seism. Soc. Am., San Francisco, Pergamon, vol. 66, no. 6, pp. 1821-1846, pp. 1246
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Earth tides ; TIDES ; Inhomogeneity ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 7
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    Unbekannt
    The mechanics of locating earthquakes (1976)
    In:  Bull. Seism. Soc. Am., Tulsa, 3-4, vol. 66, no. 3-4, pp. 173-187, pp. B09405, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Seismology ; Location ; AUD ; Hypocenter determination ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 8
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    Unbekannt
    Seismic velocity structure along a section of the San Andreas fault near Bear Valley, California (1975)
    In:  Bull. Seism. Soc. Am., Oxford and Edinburgh, Blackwell Scientific Publications, vol. 65, no. 5, pp. 1177-1197, pp. B09408, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Fault zone ; Deep seismic sounding (espec. cont. crust) ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 9
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    Unbekannt
    Time-domain determination of earthquake fault parameters from short-period P-waves (1976)
    In:  Bull. Seism. Soc. Am., Roma, Polish Geothermal Association, vol. 66, no. 2, pp. 1459-1484, pp. B05406, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): High frequency ... ; Data analysis / ~ processing ; Fault plane solution, focal mechanism ; Seismology ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 10
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    Responsibilities in earthquake prediction (1976)
    In:  Bulletin of the Seismological Society of America, Tokyo, Am. Geophys. Union, vol. 66, no. 6, pp. 2069-2074, pp. 8043
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Earthquake precursor: prediction research ; ethics ; Seismology ; society ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 11
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    Unbekannt
    Surface strong motion associated with a stick-slip event in a foam rubber model of earthquakes (1975)
    In:  Bull. Seism. Soc. Am., Amsterdam, Elsevier Scientific Publishing Company, vol. 65, no. 12, pp. 1059-1071, pp. 1390
    Details
    Publikationsdatum: 1975
    Schlagwort(e): SModelling ; Source ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 12
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    Unbekannt
    The effect of tectonic stress release on explosion P-wave signatures (1976)
    In:  Bull. Seism. Soc. Am., Hannover, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 66, no. 40, pp. 1441-1457, pp. L08305
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Nuclear explosion ; Stress ; P-waves ; Seismology ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 13
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    Unbekannt
    An estimate of strike-slip fault friction stress and fault depth from surface displacement data (1975)
    In:  Bull. Seism. Soc. Am., Hannover, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 65, no. 5385, pp. 1259-1266, pp. L03607
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Stress ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Friction ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 14
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    Unbekannt
    A source theory for complex earthquakes (1975)
    In:  Bull. Seism. Soc. Am., Warszawa, Elsevier, vol. 65, no. 2, pp. 1385, pp. 2382, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Source ; Seismology ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 15
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    Unbekannt
    Seismicity of northern Anatolia (1976)
    In:  Bull. Seism. Soc. Am., London, Geological Society, vol. 66, no. 3, pp. 843-868, pp. L24307, (ISBN 1-86239-117-3)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Seismicity ; Turkey ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 16
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    Unbekannt
    Simplified procedures for estimating the fundamental period of a soil profile (1976)
    In:  Bull. Seism. Soc. Am., Amsterdam, Academic Press (Elsevier), vol. 66, no. 4, pp. 1293-1321, pp. 2486, (ISBN 1-86239-117-3)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Site amplification ; Spectrum ; method ; noksp ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 17
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    Unbekannt
    Seismic intensities, "size" of earthquakes and related parameters (1975)
    In:  Bull. Seism. Soc. Am., Luxembourg, Am. Soc. Mech. Eng., vol. 65, no. 5, pp. 1287-1313, pp. B04203, (ISBN 0-471-26610-8)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Intensity ; Source parameters ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 18
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    Unbekannt
    A new method for the analysis of multimode surface wave dispersion, applicated to Love wave propagation in the East Pacific (1975)
    In:  Bull. Seism. Soc. Am., Tokyo, Terra Scientific Publishing Company, vol. 65, no. 6, pp. 323-342, pp. 8010, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Dispersion ; Surface waves ; Love-waves ; Data analysis / ~ processing ; Seismology ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 19
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    A two-dimensional analysis of surface deformation due to dip-slip faulting (1976)
    In:  Bull. Seism. Soc. Am., Heidelberg, 1, vol. 66, no. 4-5, pp. 667-675, pp. B01401, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Elasticity ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 20
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    Scaling relations for earthquake source parameters and magnitudes (1976)
    In:  Bull. Seism. Soc. Am., Regensburg, Inst. Electrical & Electronics Engineers, vol. 66, no. 3, pp. 1501-1523, pp. TC5001, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Source parameters ; Magnitude ; Source ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 21
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    Unbekannt
    Body force equivalents for stress-drop seismic sources (1976)
    In:  Bull. Seism. Soc. Am., Regensburg, Inst. Electrical & Electronics Engineers, vol. 66, no. 3, pp. 1801-1804, pp. TC5001, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Body waves ; Stress drop ; Elasticity ; Seismology ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 22
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    Unbekannt
    Variation of source properties: the Inanghua, New Zealand, aftershocks of 1968 (1975)
    In:  Bull. Seism. Soc. Am., Bonn, Inst. f. Theoret. Geodäsie, vol. 65, no. 3-5, pp. 261-276, pp. 1056, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Earthquake ; Source ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 23
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    Unbekannt
    Abnormal seismology (1976)
    In:  Bull. Seism. Soc. Am., Warszawa, Elsevier, vol. 66, no. 1, pp. 617-623, pp. 2091, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Seismology ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 24
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    Unbekannt
    Inversion of the body waves from the Borrego Mountain earthquake to the source mechanism (1976)
    In:  Bull. Seism. Soc. Am., Hannover, FU Berlin, vol. 66, no. 3, pp. 1485-1499, pp. 5091692, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Inversion ; Body waves ; Earthquake ; Source ; Source parameters ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 25
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    Unbekannt
    Seismic characteristics of southeast Missouri as indicated by a regional telemetered microearthquake array (1976)
    In:  Bull. Seism. Soc. Am., Houston, Akademie-Verlag, vol. 66, no. 6, pp. 1953-1964, pp. L08310, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Seismology ; Teleseismic events ; Seismic arrays ; Schafer ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 26
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    A portable digital seismic recorder with event recording capability (1976)
    In:  Bull. Seism. Soc. Am., New York, Scientific American, vol. 66, no. Nov., pp. 979-985, pp. B10302, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Seismology ; Instruments ; Detectors ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 27
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    Unbekannt
    On the estimation of seismic detection thresholds (1975)
    In:  Bull. Seism. Soc. Am., Luxembourg, National Academy of Sciences of the USA, vol. 65, no. 1, pp. 1631-1642, pp. B05311, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Seismic networks ; NOISE ; Detectors ; NOR ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 28
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    Unbekannt
    Epicentral deformation based on the dilatancy-fluid diffusion model (1975)
    In:  Bull. Seism. Soc. Am., Minsk, Polish Geothermal Association, vol. 65, no. 3, pp. 845-854, pp. TC5003, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Earthquake precursor: prediction research ; Dual Induction Latero logAT ; Dislocation ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 29
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    Three adaptive filters for the detection of body waves, with application to deep seismic soundings (1975)
    In:  Bull. Seism. Soc. Am., Roma, Polish Geothermal Association, vol. 65, no. 1, pp. 995-1012, pp. B09303, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Filter- ; Detectors ; Body waves ; Deep seismic sounding (espec. cont. crust) ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 30
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    Preliminary empirical model for scaling Fourier amplitude spectra of strong ground acceleration in terms of earthquake magnitude, source-to-station distance and recording site conditions (1976)
    In:  Bull. Seism. Soc. Am., Warszawa, EGS, vol. 66, no. 4, pp. 1343-1373, pp. 1089, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Site amplification ; Earthquake engineering, engineering seismology ; Spectrum ; Strong motions ; Magnitude ; Attenuation ; Modelling ; noksp ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 31
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    Automatic seismic array and network detection (1976)
    In:  Bull. Seism. Soc. Am., Hannover, Elsevier, vol. 66, no. 4, pp. 1375-1380, pp. L15S14, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Detectors ; Data analysis / ~ processing ; ARRAY ; Seismic networks ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 32
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    A computer program for the application Zoeppritz's amplitude equations and Knott's energy equations (1976)
    In:  Bull. Seism. Soc. Am., Corvallis, x + 406 pp., Oregon State University Press, vol. 66, no. 1, pp. 1881-1885, pp. L13610, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): EDV ; Energy (of earthquakes) ; Amplitude ; Data analysis / ~ processing ; Reflectivity ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 33
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    Statistical analysis and interpretation of surface wave anelastic attenuation data for the stable interior of North America (1975)
    In:  Bull. Seism. Soc. Am., Zagreb, Conseil de l'Europe, vol. 65, no. 4, pp. 1115-1128, pp. L02307, (ISSN 0343-5164)
    Details
    Publikationsdatum: 1975
    Schlagwort(e): Seismology ; Statistical investigations ; Surface waves ; Inelastic ; Attenuation ; BSSA
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 34
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    Computer simulation of screw dislocation in aluminum (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-08-09
    Beschreibung: The atomic structure in a 110 screw dislocation core for aluminum is obtained by computer simulation. The lattice statics technique is employed since it entails no artificially imposed elastic boundary around the defect. The interatomic potential has no adjustable parameters and was derived from pseudopotential theory. The resulting atomic displacements were allowed to relax in all three dimensions.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 137-146
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  • 35
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    A critical review of the effects of mean and combined stresses on fatigue limit of metals (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-08-09
    Beschreibung: The effects of mean and combined stresses on the fatigue limit of metals are critically reexamined. Data are presented which contradict the widely used fatigue limit analyses.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 51-65
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  • 36
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    Macroscopic aspects of interfacial reactions (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-08-09
    Beschreibung: The extent of interdiffusion and formation of new phases is determined by the constitution diagram of the alloy system, the interdiffusion coefficients of the phases present, and the thermal conditions (temperature and time) associated with the bonding process and/or subsequent use of the bonded structure. In many instance, the kinetics of interdiffusion and phase formation can be predicted from known parameters using numerical methods and computer techniques. Predictions are compared with experimentally determined parameters for a variety of metallurgical alloy systems.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 15-35
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  • 37
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    Microscopic aspects of interfacial reactions in diffusion bonding processes (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-08-09
    Beschreibung: Microscopic aspects of interfacial reactions are discussed, such as interdiffusion, formation of intermetallic phases, generation and annihilation of lattice defects, effect of temperature, grain size, etc., which normally occur in diffusion bonding processes. Relationships between properties and microstructure in thin film couples are examined utilizing a unique combination of contact resistance measurements and characterization by transmission electron microscopy.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 3-35
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  • 38
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    Gamma rays, cosmic rays and galactic structure (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: Working primarily from the recent SAS-2 observations of galactic gamma rays, the relation of these observations to the large scale distribution of cosmic rays and interstellar gas in the galaxy is reviewed and reexamined. Starting with a discussion of production rates, the case for pion decay being the predominant production mechanism in the galactic disk above 100 MeV is reestablished and it is also pointed out that Compton gamma rays can be a significant source. To facilitate discussion, the concepts of four distinct galactic regions are defined, viz. the nebulodisk, ectodisk, radiodisk and exodisk. Bremsstrahlung and pion decay gamma rays are associated with the first two (primarily the first) regions, and Compton gamma rays and synchrotron radiation are associated with the latter two regions. On a large scale, the cosmic rays, interstellar gas (primarily H2 clouds in the inner galaxy) and gamma ray emissivity all peak in a region between 5 and 6 kpc from the galactic center. This correlation is related to correlation with other population I phenomena and is discussed in terms of the density wave concept of galactic structure. The singular nature of the HI distribution appears to follow the supernova remnant and pulsar distributions in the galaxy.
    Schlagwort(e): SPACE RADIATION
    Materialart: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 357-391
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    NASA TECHNICAL REPORTS
  • 39
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    The non-thermal radiation in the galaxy (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The distribution of nonthermal emissivity with height z above the galactic plane is examined. The main result is that recent observations of the distribution of brightness at intermediate latitudes in the galaxy and of the edge-on spiral galaxy NGC 891 indicate that the emissivity extends to heights of several kpc perpendicular to the plane. The relationship between the nonthermal emissivity and the neutral gas is also studied. In several galaxies the angular distributions of neutral hydrogen and nonthermal emission are roughly coextensive and show similar features such as spiral structure. If radio galaxies and normal galaxies with strong nuclear radio sources are excluded, there appears to be a proportionality between their total HI content and their nonthermal radio luminosity.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 206-221
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  • 40
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    Gamma rays and supernova explosions (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The detection of gamma rays from supernovae will provide interesting tests of current theory. Some current ideas on the expected gamma ray flux, as modified by recent theoretical results are reviewed.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 289-298
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  • 41
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    COS-B observations of localised sources of gamma-ray emission (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: In October 1975 the high energy gamma ray flux from the Vela pulsar was measured by COS-B to be 1.6 to 2.1 times higher than the flux measured by SAS-2 in 1973. The existence is confirmed of a second region of enhanced radiation in the galactic anticenter in addition to that from the Crab pulsar.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 45A-51
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  • 42
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    SAS-2 galactic gamma ray results, 1 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: Continuing analysis of the data from the SAS-2 high energy gamma-ray experiment has produced an improved picture of the sky at photon energies above 35 MeV. On a large scale, the diffuse emission from the galactic plane is the dominant feature observed by SAS-2. This galactic plane emission is most intense between galactic longitude 310 and 45 deg, corresponding to a region within 7kpc of the galactic center. Within the high-intensity region, SAS-2 observes peaks around galactic longitudes 315 deg, 330 deg, 345 deg, 0 deg, and 35 deg. These peaks appear to be correlated with such galactic features and components as molecular hydrogen, atomic hydrogen, magnetic fields, cosmic ray concentrations, and photon fields.
    Schlagwort(e): SPACE RADIATION
    Materialart: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 1-11C
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  • 43
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    Extreme ultraviolet survey experiment MA-083 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: A grazing incidence telescope sensitive to radiation in the 5- to 100-nanometer band was flown in the Apollo service module. On 10 nighttime revolutions, the command and service module was maneuvered to point the instrument at 30 different stellar targets for periods of 1 to 20 minutes, thus constituting the first sensitive search for extreme ultraviolet radiation from nonsolar sources. Several hours of supplementary data were also obtained during nighttime orbits when other experiments in the scientific instrument module bay were operating. Preliminary analysis of a small fraction of the total data indicates the definite detection of a strong source of extreme ultraviolet radiation during observations made during revolution 109. The source is located in Coma Berencies. The suggested optical identification is the white dwarf HZ 43. If this association is correct, the star has the highest temperature of any known white dwarf. Regardless of the optical identification, however, this object is the first nonsolar source to be detected in the extreme ultraviolet band.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Lyndon B. Johnson Space Center Apollo-Soyuz Test Project; 16 p
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  • 44
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    Cosmic X-ray observations with OSO-8 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The GSFC Cosmic X-ray Spectroscopy experiment aboard OSO-8 has operated successfully since launch providing spectral and temporal data on X-ray sources in tha energy range 2-60 keV. Analysis of quick look data shows a variety of spectral features, some stable, others variable, which will increase understanding of the nature of individual sources. In particular, observed emission and absorption features that can be attributed to iron will result in abundance measures of this important element in sources such as some X-ray binaries, the supernova remnant Cas A, and the nucleus of the galaxy Cen A.
    Schlagwort(e): SPACE RADIATION
    Materialart: X-ray Binaries; p 67-79
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  • 45
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    Monotectic and syntectic alloys experiment MA-044 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The flight test furnace run of the monotectic and syntectic alloys experiment was successfully performed during the Apollo Soyuz Test Project mission. All three experiment cartridges were returned intact. A second ground based test was conducted after the mission to provide one g samples with an equivalent thermal history. The examinations of all flight and ground based cartridges and ampoules have been completed. Encouraging results have been obtained in the preliminary analysis of one flight aluminum antimonide sample as compared to ground based and prototype test counterparts. In terms of reduction of the unwanted second phase, the low g sample shows a homogeneity improvement by a factor of 5 to 20. Preliminary examination of one lead zinc flight sample shows a dispersion of lead in the zinc matrix. However, complete homogenization of the material did not occur. A thermal analysis of flight data shows that the average soak temperature for the head zinc ampoules was 20 C lower than planned but 35 C above the published consolute temperature..
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Apollo-Soyuz Test Project; 25 p
    Format: text
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  • 46
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    Cosmic ray propagation and containment (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The cosmic rays, an active gaseous component of the disk of the galaxy, are considered along with their propagation and containment as a part of the general dynamics of the disk. The sources of cosmic rays are a matter of speculation. The disk is inflated by the cosmic ray gas pressure comparable to the magnetic pressure, but the rate of inflation is unknown. The time spent by the individual cosmic ray particles in the disk is inversely proportional to the cosmic ray production rate. It is evident from the decay of Be(1c) that the cosmic rays circulate through a volume of space perhaps ten times the thickness of the gaseous disk, suggesting a magnetic halo extending out approximately 1 kpc from either face of the disk. The cosmic rays may be responsible for the halo by inflating the magnetic fields of the disk. Extension of the fields to 1 kpc would imply a high production rate and short life of cosmic rays in the dense gaseous disk of the galaxy.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 320-340
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  • 47
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    Low and medium energy galactic gamma-ray observations (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: Observation of 0.2-100 MeV diffuse gamma radiation emitted from the Galaxy can provide information on the intensities of 5-50 MeV/nucleon cosmic-rays and 50 MeV electrons in interstellar space. Recent measurements of gamma-rays emitted from the galactic center region provide evidence for a diffuse continuum between 10 and 100 MeV. The intensities of the recently reported nuclear line gamma rays, also observed in the direction of the galactic center, require the presence of intense fluxes of low-energy cosmic-rays in the inner Galaxy if the gamma-rays are produced on a galactic scale. Current detection techniques for 0.1-100 MeV gamma-ray measurements are summarized and their capabilities for measuring the diffuse galactic emission are evaluated.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center. The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 65-83
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  • 48
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    Crystal activation experiment MA-151 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The crystal activation experiment consisted of two sample packages that were flown in the command module and returned to earth for analysis of the radioactivity induced in them during the flight. The objective of the experiment was to define the background caused by detector activation that interferes when gamma radiation is measured in the 0.02- to 10-megaelectronvolt range from earth orbit. Preliminary results show that the activation of the NaI(Tl) crystal was a factor of 3 below that from a similar measurement on Apollo 17. The identification of certain species and the level of activation observed show an important contribution from the interactions of thermal and energetic neutrons produced as secondaries in the spacecraft. That the activation was reduced by only a factor of 3 compared with the Apollo 17 experiment, despite the geomagnetically shielded orbit, possibly indicates more efficient secondary neutron production by the more energetic cosmic rays.
    Schlagwort(e): SPACE RADIATION
    Materialart: Apollo-Soyuz Test Project; 10 p
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  • 49
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    Gamma rays and large scale galactic structure (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: Many theoretical models were developed in an attempt to explain the spatial structure in the observed emission which results from interactions of energetic cosmic rays with the interstellar gas. The peaks in the observed distribution are remarkably well correlated with longitudes corresponding to tangential directions to known spiral arm features. Based on theoretical and experimental arguments, it is assumed that on the scale of galactic arms the cosmic rays are more intense where the mass of the gas to which they are coupled is greatest. Refining this model with the results of recent surveys of the interstellar gas, a good fit to the observations is obtained whether the cosmic rays are confined to the spiral arms in the disk or are more evenly confined as in a flat halo model.
    Schlagwort(e): SPACE RADIATION
    Materialart: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 341-354
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  • 50
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    The time structure of the gamma-ray emission from the Crab and Vela pulsars (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: High resolution data on the pulsed gamma ray emission from the Crab and Vela pulsars are presented. The light curves of these two pulsars at gamma ray energies show striking similarities.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 52-64
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  • 51
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    Preliminary Results from the European Space Agency's COS-B satellite for gamma-ray astronomy (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The COS-B satellite carries a single experiment, capable of detecting gamma rays with energies greater than 30 MeV. Its objectives are to study the spatial, energy, and time characteristics of high energy radiation of galactic and extragalactic origin. The capability to search for gamma ray pulsations is enhanced by the inclusion in the payload of a proportional counter sensitive to X-rays of 2-12 Kev. The experiment was calibrated using particle accelerators. The results of these measurements are presented and the performance of the system in orbit is discussed.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 23-38
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  • 52
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    Soft X-ray observation experiment MA-048 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The Apollo Soyuz Test Project Soft X-ray Experiment was designed to observe celestial X-ray sources in the energy range from 0.1 to 10 kiloelectronvolts. The instrument that was used in the experiment obtained energy and fast timing data to characterize both the spectrum and the variability of known X-ray sources. Data were obtained on approximately 12 sources. During the mission, the instrument developed an intermittent high voltage discharge problem that resulted in the loss of approximately 75 percent of the anticipated data, including the scans intended for mapping of the low energy diffuse X-ray background.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Lyndon B. Johnson Space Center Apollo-Soyuz Test Project; 11 p
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  • 53
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    SAS-2 galactic gamma ray results. 2. Localized sources (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: Gamma-ray emission was detected from the radio pulsars PSR1818-04 and PSR1747-46, in addition to the previously reported gamma-ray emission from the Crab and Vela pulsars. Since the Crab pulsar is the only one observed in the optical and X-ray bands, these gamma-ray observations suggest a uniquely gamma-ray phenomenon occurring in a fraction of the radio pulsars. Using distance estimates it is found that PSR1818-04 has a gamma-ray luminosity comparable to that of the Crab pulsar, while the luminosities of PSR1747-46 and the Vela pulsar are approximately an order of magnitude lower. This survey of SAS-2 data for pulsar correlations has also yielded upper limits to gamma-ray luminosity for 71 other radio pulsars.
    Schlagwort(e): SPACE RADIATION
    Materialart: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 12-22
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  • 54
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    COS-B observations of the high energy gamma radiation from the galactic disc (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: During the first months of operation, COS-B has observed galactic high energy gamma rays from the galactic disc. In the galactic center and Vela regions the disc emission distribution was measured. From these data the existence of a local ( 1 kpc) and a distant ( 3 kpc) emitting region is apparent in the general direction of the inner galaxy.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center The Galaxy and Galactic Gamma Rays; p 39-44
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  • 55
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    Interstellar helium flow experiment MA-088 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The Apollo Soyuz Test Project Interstellar Helium Glow Experiment (MA-088) studied the motion of helium in the local interstellar medium as that medium passed through the solar system to determine several poorly known properties of the local interstellar gas. The instrument used was a photometer sensitive to two solar extreme ultraviolet spectral lines that are resonantly scattered by helium gas. The instrument surveyed the entire celestial sphere during a series of slow, rolling maneuvers by the Apollo spacecraft. The equipment operated properly, and usable data were obtained.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Lyndon B. Johnson Space Center Apollo-Soyuz Test Project; 15 p
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  • 56
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    Trends in aircraft noise control (1975)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-11
    Beschreibung: Flight vehicles are characterized according to their manner of operation and type of propulsion system; and their associated sources of noise are identified. Available noise reduction technology as it relates to engine cycle design and to powerplant component design is summarized. Such components as exhaust jets, fans, propellers, rotors, blown flaps, and reciprocating-engine exhausts are discussed, along with their noise reduction potentials. Significant aircraft noise reductions are noted to have been accomplished by the application of available technology in support of noise certification rules. Further noise reductions to meet more stringent future noise regulations will require substantial additional technology developments. Improved analytical prediction methods, and well-controlled validation experiments supported by advanced-design aeroacoustic facilities, are required as a basis for an effective integrated systems approach to aircraft noise control.
    Schlagwort(e): AIRCRAFT PROPULSION AND POWER
    Materialart: NASA/Univ. Conf. on Aeron.; p 103-130
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  • 57
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    On onsagers principle, dislocation motion and hydrogen embrittlement (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-08-09
    Beschreibung: Onsager's reciprocal relationships from the linear theory of irreversible thermodynamics are applied to hydrogen - dislocation interactions. Existing experimental evidence shows that dislocation motion causes localized hydrogen accumulation; thus, from the Onsager principle, localized hydrogen accumulations will affect dislocation motion and therefore the properties of metals and alloys exposed to hydrogen environments.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 77-84
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  • 58
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    Nonlinear hyperbolic theory of thermal waves in metals (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: A closed-form solution for cylindrical thermal waves in metals is given based on the nonlinear hyperbolic system of energy-conservation and heat-flux relaxation equations. It is shown that heat released from a line source propagates radially outward with finite speed in the form of a thermal wave which exhibits a discontinuous wave front. Unique nonlinear thermal-wave solutions exist up to a critical amount of driving energy, i.e., for larger energy releases, the thermal flow becomes multivalued (occurrence of shock waves). By comparison, it is demonstrated that the parabolic thermal-wave theory gives, in general, a misleading picture of the profile and propagation of thermal waves and leads to physical (infinite speed of heat propagation) and mathematical (divergent energy integrals) difficulties. Attention is drawn to the importance of temporal heat-flux relaxation for the physical understanding of fast transient processes such as thermal waves and more general explosions and implosions.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of Chemical Physics; 63; Sept. 1
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  • 59
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    Comparison of isothermal and cyclic oxidation behavior of twenty-five commercial sheet alloys at 1150 C (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Twenty-five commercial nickel-, iron-, and cobalt-base sheet alloys incorporating chromium or chromium and aluminum additions for oxidation resistance were tested at 1150 C in air for 100 hr in both isothermal and 1-hr cyclic furnace exposures. The alloys were evaluated by sample specific weight change, by type of scale formed, by amount and type of spall, and by sample thickness change and microstructure.-
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Oxidation of Metals; 9; Aug. 197
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  • 60
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    Fatigue failure of hydrogen embrittled high strength steels (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Results of an experimental investigation are presented concerning the fracture behavior of cathodically charged, quenched and tempered martensitic steels under cyclic load conditions. Introduction of H2 by cathodic charging reduced fatigue life by as much as 60%. It is proposed that subsurface transverse fatigue cracks nucleate simultaneously at multiple sites, such as at microcracks, voids, or inclusions. Fatigue crack growth then occurs on planes perpendicular to the major applied stress axis in the presence of the critical combination of applied external stress and hydrogen.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Metallurgical Transactions A - Physical Metallurgy and Materials Science; 6A; July 197
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  • 61
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    Origin of cosmic rays (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Based on recent observations of the galactic gas and gamma ray distributions, the galactic cosmic ray distribution is deduced. This distribution is identical to that of supernova remnants (within experimental error), strongly supporting the hypothesis that most observed cosmic rays are produced by supernovas in our own galaxy. The average age of the cosmic ray sources is suggested, from the character of their distribution, to be about 30 million years.
    Schlagwort(e): SPACE RADIATION
    Materialart: Physical Review Letters; 35; July 21
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  • 62
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    High-energy galactic gamma radiation from cosmic rays concentrated in spiral arms (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: A model for the emission of high-energy (exceeding 100 Mev) gamma-rays from the galactic disk has been developed and compared with recent SAS-2 observations. In the calculation, it is assumed that (1) the high energy galactic gamma-rays result primarily from the interaction of cosmic rays with galactic matter, (2) the cosmic-ray density is proportional to the matter density on the scale of galactic arms, and (3) the matter in the Galaxy is distributed in a spiral pattern consistent with density-wave theory and experimental data on the matter distribution that is available, including the 21-cm H I line emission, continuum emission from H II regions, and data currently being used to estimate the H2 density. The calculated galactic-longitude distribution of gamma rays is in good agreement with the SAS-2 observations in relative shape and absolute flux. As a corollary, the nonuniform cosmic-ray distribution of this model tends to support the galactic origin of the fraction of cosmic rays which is important in the production of high-energy photons. Modifications of the basic model show that the gamma-ray flux is relatively sensitive to large variations of the assumed distribution of molecular hydrogen in the Galaxy.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astrophysical Journal; 199; July 1
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  • 63
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    The role of electron concentration in softening and hardening of ternary molybdenum alloys (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: An investigation was conducted to determine softening and hardening behavior in ternary Mo alloys and to correlate these effects with electron concentration. Results showed that the hardness behavior of ternary Mo alloys could be correlated with results anticipated from binary data based upon expressions involving the number of s + d electrons contributed by the solute elements. It was further shown that combining alloying elements at concentrations that produce the maximum amount of softening in Mo does not result in additive softening in ternary Mo alloys. Once a critical electron concentration is exceeded, only alloy hardening is observed. A comparison of hardness behavior with literature data on Hall coefficient and magnetic susceptibility for W-Re alloys showed that hardness minima occur at Re concentrations where minima are observed for the physical property measurements. These observations, and the correlation of hardness with electron concentration, support the hypothesis that alloy softening in Group VI metals is an intrinsic characteristic of these metals and that electron concentration plays the dominant role in controlling hardness.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of the Less-Common Metals; 41; July 197
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  • 64
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    Observations of cosmic gamma-ray bursts with IMP-7 - Evidence for a single spectrum (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Spectral observations of nine recent cosmic gamma-ray bursts are reported. The average photon number spectra of all nine events are each consistent with a 150-keV exponential from 100 keV to about 400 keV, and a power law of index -2.5 from 400 keV to 1100 keV. The observations also indicate an event rate of 16 in 1972 and 1973, or 8 plus or minus 2 per year, higher than the 5 plus or minus 1 per year initially reported. This corresponds to an approximately 40 percent lower effective intensity threshold, attained by using more sensitive detectors in multiple-satellite coincidence.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astrophysical Journal; 196; Feb. 15
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  • 65
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    Whence cometh /and goeth/ Jupiter's high energy electrons (1976)
    In:  Other Sources
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    Publikationsdatum: 2011-08-17
    Beschreibung: Jupiter's decimetric emission is universally identified as synchrotron radiation from about 10 MeV electrons. These electrons radiate away their energy in a few months and hence must be continuously replaced. A theory in which electrons are injected at Jupiter's magnetopause and radially diffuse toward the planetary surface, gaining energy in the process is summarized. The radial diffusion coefficient in the inner magnetosphere is determined. This diffusion coefficient, which also holds for protons, is sufficiently small that the inner Galilean satellites can wipe out large fractions of the incoming proton and electron fluxes. The reduction of the proton flux is extremely important to the survival of the Pioneer experimental payloads.
    Schlagwort(e): SPACE RADIATION
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  • 66
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    Stress rupture resistance (1976)
    In:  Other Sources
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    Publikationsdatum: 2011-08-17
    Beschreibung: Principles underlying the design of metallic systems for stress rupture resistance are outlined by considering the specific case studies of cobalt- and nickel-base superalloys. Ways in which superalloys can be designed for high stress rupture resistance are discussed. In describing the alloying procedures, the strengthening mechanisms involved and methods of avoiding phases detrimental to stress rupture resistance are identified. New processing techniques such as controlled solidification, prealloyed powder processing, and autoclave heat treatments are described as further means of achieving increased stress rupture resistance in superalloy and other systems.
    Schlagwort(e): METALLIC MATERIALS
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  • 67
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    Metal powder reactions in ball milling (1976)
    In:  Other Sources
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    Publikationsdatum: 2011-08-17
    Beschreibung: On milling chromium powder in three metal chlorides and either chromium or nickel powders in ten organic liquids representative of nine different functional groups, the powders always reacted with the liquids and became contaminated with elements from them. The milled powders had specific surface areas ranging from 0.14 to 37 sq m/g, and the total contamination with elements from the milling liquid ranged from 0.01 to 56 wt%. In most milling runs, compounds resulting from substitution, addition, or elimination reactions formed in or from the milling liquid, and in most runs with organic liquids H2, CH4, and CO2 were generated.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: I & EC - Industrial and Engineering Chemistry; vol. 15
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  • 68
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    Scintillating plastic fibers as light pipes for a cosmic ray hodoscope: Feasibility calculations and measured attenuation characteristics (1976)
    In:  Other Sources
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    Publikationsdatum: 2011-08-17
    Beschreibung: A candidate hodoscope uses arrays of scintillator fibers, followed by an image intensifier and imaging system such as that proposed for the X-ray shadowgraph. A literature search was performed to ascertain the experience of other workers with hodoscopes using this or similar principles. Calculations were performed to determine the feasibility of candidate systems and some laboratory experiments were performed to attempt to check these numbers.
    Schlagwort(e): SPACE RADIATION
    Materialart: The Specific Light Output of Cesium Iodide Crystals; p 45-58
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  • 69
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    Scanning electron microscope investigation of the structural growth in thick sputtered coatings (1975)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Sputtered S-Monel, silver, and 304 stainless steel coatings and molybdenum disulfide coatings were deposited on mica and metal substrates with various surface finishes to investigate the structural growth of the coating by scanning electron microscopy. The geometry and the surface morphology of the nodules are characterized. Compositional changes within the coating were analyzed by energy dispersive X-ray analysis. Defects in the surface finish act as preferential nucleation sites and form isolated overlapping and complex nodules and various unusual surface overgrowths on the coating. The nodule boundaries are very vulnerable to chemical etching and these nodules do not disappear after full annealing. Further, they have undesirable effects on mechanical properties; cracks are initiated at the nodules when the coating is stressed by mechanical forces.
    Schlagwort(e): METALLIC MATERIALS
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  • 70
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    Structure and elevated temperature properties of carbon-free ferritic alloys strengthened by a Laves phase (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: A Laves phase, Fe2Ta, was utilized to obtain good elevated temperature properties in a carbon-free iron alloy containing 1 at. pct Ta and 7 at. pct Cr. Room temperature embrittlement resulting from the precipitation of the Laves phase at grain boundaries was overcome by spheroidizing the precipitate. This was accomplished by thermally cycling the alloys through the alpha to gamma transformation. The short-time yield strength of the alloys decreased very slowly with increase in test temperature up to 600 C, but above this temperature, the strength decreased rapidly. Results of constant load creep and stress rupture tests conducted at several temperatures and stresses indicated that the rupture and creep strengths of spheroidized 1 Ta-7 Cr alloy were higher than those of several commercial steels containing chromium and/or molybdenum carbides but lower than those of steels containing substantial amounts of tungsten and vanadium. When molybdenum was added to the base Fe-Ta-Cr alloy, the rupture and creep strengths were considerably increased.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Metallurgical Transactions A - Physical Metallurgy and Materials Science; 6A; June 197
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  • 71
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    Note on performance of tapered grip tensile loading devices (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Alignment results are presented in terms of percent bending for a quick release, tapered grip, tensile loading device that has been proposed for testing sharply notched specimens of aluminum and magnesium alloys by a Task Group of the ASTM Committee E-24 on Fracture Testing of Metals. The results show that the bending introduced by the fixtures is strongly dependent on their relative rotational positions in respect to the loading rods which adapt them, to the tensile machine. For one set of tapered grips the highest bending was about 15%. Recommendations are made for improvement in the design of the tapered grips which should reduce the bending stresses substantially.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of Testing and Evaluation; 3; May 1975
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  • 72
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    Texturing in metals as a result of sliding (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Sliding friction experiments were conducted with copper, nickel, iron and cobalt sliding on themselves in air and argon. The resulting wear surfaces were examined by X-ray analysis to determine if surface texturing had occurred as a result of sliding. Results of the investigation indicate that, for the face-centered-cubic metals copper and nickel, a (111) texture develops with the (111) planes tilted 10 deg in the direction of sliding. The body-centered-cubic metal iron exhibited a (110) texture with the (111) direction oriented in the direction of sliding. It also exhibited a 10 deg tilt in the direction of sliding. The environment influenced the results in that the degree of texture observed in argon was less than that seen in air for iron. No texturing was observed for the close-packed-hexagonal metal cobalt. Recrystallization was observed with copper as a result of sliding.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Wear; 33; June 197
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  • 73
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    Corrosion and fatigue of surgical implants (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Implants for the treatment of femoral fractures, mechanisms leading to the failure or degradation of such structures, and current perspectives on surgical implants are discussed. Under the first heading, general usage, materials and procedures, environmental conditions, and laboratory analyses of implants after service are considered. Corrosion, crevice corrosion, stress corrosion cracking, intergranular corrosion, pitting corrosion, fatigue, and corrosion fatigue are the principal degradation mechanisms described. The need for improvement in the reliability of implants is emphasized.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: ASTM Standardization News; 3; May 1975
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  • 74
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    New evidence of the mechanisms of noise generation and radiation of a subsonic jet (1975)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): AIRCRAFT PROPULSION AND POWER
    Materialart: Acoustical Society of America; vol. 57
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  • 75
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    Defect structure of NiO and rates and mechanisms of formation from atomic oxygen and nickel (1975)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Oxidation of Metals; 9; Feb. 197
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  • 76
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    Studies on the Al2O3-Ti-Mo-Au metallization system (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The behavior of Ti-Mo-Au metallization on Al2O3 and C has been investigated by backscattering spectrometry. Results show that Mo-Au bimetal films typically mix during deposition. Diffusion of Ti in Mo film occurs at 600 C, but is inhibited by the presence of oxygen in the Ti film. Even 1000 A of Mo is not a barrier against interdiffusion of Ti and Au during 20-min anneals at 600 C. The amount of mixing observed also depends on the nature of the substrate which supports the Ti-Mo-Au metallization.
    Schlagwort(e): METALLIC MATERIALS
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  • 77
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    Hardness behavior of binary and ternary niobium alloys at 77 and 300 K (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: An investigation was conducted to determine the effects of alloy additions of zirconium, hafnium, molybdenum, tungsten, rhenium, ruthenium, osmium, rhodium, and iridium on the hardness of niobium. Both binary and ternary alloys were investigated by means of hardness tests at 77 and 300 K. Results showed that atomic size misfit plays a dominant role in controlling the hardness of binary niobium alloys. Alloy softening, which occurred at dilute solute additions, is most likely due to an extrinsic mechanism involving interaction between solute elements and interstitial impurities.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of the Less-Common Metals; 40; Apr. 197
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  • 78
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    Mirroring in the Fokker-Planck coefficient for cosmic-ray pitch-angle scattering in homogeneous magnetic turbulence (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The Fokker-Planck coefficient for pitch-angle scattering, appropriate for cosmic rays in homogeneous stationary magnetic turbulence is computed without making any specific assumptions concerning the statistical symmetries of the random field. The Fokker-Planck coefficient obtained can be used to compute the parallel diffusion coefficient for high-energy cosmic rays propagating in the presence of strong turbulence, or for low-energy cosmic rays in the presence of weak turbulence. Because of the generality of magnetic turbulence allowed for in the analysis, special interplanetary magnetic field features, such as discontinuities or particular wave modes, can be included rigorously.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astrophysical Journal; 195; Feb. 1
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  • 79
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    Primary gamma-rays (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Within our Galaxy, cosmic rays can reveal their presence in interstellar space and probably in source regions by their interactions with interstellar matter which lead to gamma-rays with a very characteristic energy spectrum. From the study of the intensity of the high energy gamma radiation as a function of galactic longitude, it is already clear that cosmic rays are almost certainly not uniformly distributed in the Galaxy and are not concentrated in the center of the Galaxy. The galactic cosmic rays appear to be tied to galactic structural features, presumably by the galactic magnetic fields which are in turn held by the matter in the arm segments and the clouds. On the extra-galactic scale, it is now possible to say that cosmic rays are probably not at the density seen near the earth.
    Schlagwort(e): SPACE RADIATION
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  • 80
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    Theory of fluctuations of extended air showers (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The Monte Carlo method was used to calculate the probability distribution functions of shower characteristics for primary protons at sea level. The calculation was based on the following model of the elementary event: the interaction paths are 90 g/sq cm for nucleons and 120 g/sq cm for pions. The nonelasticity coefficient for nucleons is uniformly distributed between 0.1 and 0.9, and for pions it is equal to 1. Isobaric pions are taken into account. The spectra of secondary particles were determined using Cocconi's approximation formula. The calculation for the nuclei was carried out on the assumption of a breakup of the nucleus into component nucleons. The mean number of particles and the variances of the distributions for electrons when the number of muons was fixed, and for muons when the number of electrons was fixed, were calculated.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (NASA-TT-F-807); p 394-397
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  • 81
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    Determination of coupling coefficients at various zenith angles of the basis of the cosmic ray azimuth effect (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The value of EW asymmetry and coupling coefficients at different zenith angles were measured by means of a double coincidence crossed telescope which gives an opportunity to measure simultaneously the intensity of the cosmic ray hard component at zenith angles from 0 to 84 deg in opposite azimuths. The advantages of determining the coupling coefficients by the cosmic ray azimuth effect as compared to their measurement by the latitudinal effect are discussed.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (NASA-TT-F-807); p 380-384
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  • 82
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    Study of cosmic ray motion in cosmic space near the earth (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Data are presented on experimental installations developed in the cosmic ray variations laboratory in Kazgu (Alma-Ata). Various experiments on modelling the interaction of plasma with the geomagnetic field as well as the plasma distribution in quiet and disturbed fields are described. The characteristics of the meson supertelescope using scintillators (effective area, 10 sq m) for vertical alignments designed to study microvariations of the cosmic rays and their interrelation with magnetospheric fluctuations and the study of solar wind parameters are given.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (NASA-TT-F-807); p 372-379
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  • 83
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    Distortion of the altitude dependence and energy spectrum of the neutron component near the earth's surface (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The results of the altitude distribution of slow (cadmium difference) and fast (supercadmium) neutrons from 2000 m down to sea level are given. The neutron energy spectrum is calculated by the cadmium ratio.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (NASA-TT-F-807); p 361-365
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  • 84
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    Measurement of spectra and neutron fluxes on artificial earth satellites from the Cosmos series (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: In 1966-1967 measurements were carried out at the altitudes of 200 to 400 km to determine the spectra and fluxes of fast neutrons inside the hermetically sealed artificial earth satellites of the Cosmos series. The detectors used were nuclear emulsions of the B9 and BR types and an emulsion of the P9 type, filled with Li and P. Spectra and fluxes of neutrons in the range of energies from thermal energies to 10 MeV are presented. Neutron doses are also estimated.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 252-255
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  • 85
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    The possibility of using superconductive systems in the analysis of the composition of cosmic rays (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The experimental results on the use of superconductive systems onboard of spacecraft are described. To ensure low temperatures in the cryostat under weightlessness, helium was used at a pressure above the critical pressure. In flight, the temperature was controlled at six points, while the pressure and intensity of the magnetic field were controlled in the solenoids. The methodical test proved it possible to mount special installations on satellites, with extensive magnetic fields based on superconductive alloys, and particularly, low weights and low power consumption magnetic analyzers.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 256-260
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  • 86
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    Measurement of proton spectra on satellites from the Cosmos series of artificial satellites (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: In 1966-1967 measurements were performed at altitudes from 200 to 400 km to determine the fluxes and spectra of protons by means of nuclear emulsions of the BR-2 and Ya-2 types. The proton spectra within the range up to 8 BeV are presented. The spectra obtained are the basis for estimating radiation hazards.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 247-251
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  • 87
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    The study of cosmic rays on the proton artificial earth satellite (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Investigations were carried out with the space stations of the Proton series to study the physics of cosmic rays. The SEZ-13 device for the search of particles with a fractional electrical charge and the SEZ-11 device for the measurement of high energy electrons were mounted on the Proton-3 satellite. The mode of action of the SEZ-11 device differed from that of the SEZ-12 device used in the Proton-1 and Proton-2 satellites for similar purposes. Some of the results that were obtained are presented.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 227-246
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  • 88
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    A study of cosmic rays on the artificial moon satellites Luna-11 and Luna-12 (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: In the period from the end of August 1966 to January 1967 the primary cosmic radiation fluxes beyond the terrestrial magnetosphere were measured by means of the equipment mounted on the satellites Luna-11 and Luna-12. The altitude dependence of cosmic rays near the lunar surface as well as the intensity of protons and electrons of solar origin in the moon's vicinity were determined. The correlation of proton intensity with the parameters characterizing the solar and geomagnetic activities and the specific features of the angular distribution of the proton flux as revealed during measurements are given. Data on electron fluxes studied on September 1 and 8, 1966, when short term increases in the electron intensity were observed are included.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 206-226
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  • 89
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    Calculations of the cosmic ray modulation in interplanetary space taking into account the possible dependence of the transport travel for the scattering of the particles and of the velocity of the solar winds on the angles they make with the helioequator plane: The case of isotropic diffusion (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The modulation of galactic cosmic rays is studied by the magnetic heterogeneities stream on the assumption that the diffusion coefficient is reduced whereas the solar wind velocity is increased with the growth of the angle between the sun's rotation axis and the direction of solar plasma motion. The stationary plane problem of isotropic diffusion is solved as it applies to two cases: (1) with due account of particle retardation by the antiphermium mechanism; and (2) without an account of the above mechanism. This problem is solved by the grid method in the polar coordinate system. The results of the calculations are followed by a discussion of the method of solution and of the errors.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 170-205
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  • 90
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    Comparison of the results of simultaneous cosmic ray measurements in the stratosphere at the Olenia and Apatity stations (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The results of regular measurements of the cosmic ray intensity in the stratosphere obtained by high latitudinal stations during September-December 1966 are compared. The present paper estimates the agreement between the results obtained by closely located stations by means of various radiosondes. The assumption about the substantial contribution of auroral X-ray radiation to the fluctuation of the radiosonde counting rate at high altitudes is confirmed.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 138-141
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  • 91
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    The cosmic ray burst on 28 January 1967 (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The solar cosmic ray flare which took place on January 28, 1967, is analyzed. Energy responses and the diffusion coefficient are determined. Periodic variations of the cosmic rays with an amplitude of 0.10 to 0.20% and a period of 35 to 40 min are discovered during the decrease phase of the flare.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 120-124
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  • 92
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    Solar activity and cosmic rays in the period 1963-1965 (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The interrelation between the intensity of cosmic rays and various indices of solar activity during January 1963 to June 1965 is studied.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 112-119
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  • 93
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    The relation between the chemical composition of solar cosmic rays and the duration spectrum of radiosplashes (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The comparison of durations of the centimeter and meter components of the radiosplashes corresponding to the chromospheric flares with the known chemical composition of the radiated nuclei has shown a greater duration of the centimeter component for the splashes wherein protons are dominating, and vice versa. A conclusion is made about the interrelation of heavy nucleus emission and the processes which occur in the upper layers of the solar corona.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 106-111
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  • 94
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    Energy spectrum of galactic electrons in the energy range 2 x 10 to the 10 power - 2 x 10 to the 11th power eV (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: New experimental data on the energy spectrum of galactic electrons up to the energies approximately 2 x 10 to the 11th power eV were obtained in the summer of 1967 by a scintillation telescope lifted to the stratosphere at 32 km. The geometrical factor of the telescope was 1200 sq cm steradians, i.e., three times as great as the geometrical factor of previously employed installations. The results confirm previous measurements.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (; p 102-105
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  • 95
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    Theory of cosmic ray variations (1975)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The initial anisotropic and isotropic spaces of solar cosmic ray spreading in interplanetary space are compared with the results of direct observations in the region adjacent to the earth's orbit and with the results of explorations of the eleven-year and twenty-seven-day variations of the cosmic rays in more distant regions.
    Schlagwort(e): SPACE RADIATION
    Materialart: Cosmic Rays (NA; p 1-101
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  • 96
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    Discussion of 'Unusual potential drop during the application of the electrical potential method in a fracture mechanics test' by V. Bachmann and D. Munz (1976)
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    Publikationsdatum: 2011-08-17
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of Testing and Evaluation; 4; Nov. 197
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  • 97
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    Dissolution kinetics of small amounts of oxygen in tantalum alloy T-111 and internal oxide displacement reactions during annealing (1976)
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    Publikationsdatum: 2011-08-17
    Beschreibung: Oxygen was added to T-111 (Ta-8W-2Hf, wt. %) at 820 and 990 C at an oxygen pressure of about 0.0003 torr. The technique employed permitted predetermined and reproducible doping of T-111 up to 3.0 at. % oxygen. Based on the temperature dependence of the doping reaction, it is concluded that the initial rates of oxygen pickup are probably controlled by solution of oxygen into the T-111 lattice. Although hafnium oxides are more stable than those of tantalum or tungsten, analyses of extracted residues indicate that the latter oxides predominate in the as-doped specimens, presumably because of the higher concentrations of tantalum and tungsten in the alloy. However, high-temperature annealing promotes gettering of dissolved oxygen and of other oxides to form hafnium oxides. Small amounts of tantalum and tungsten oxides were still present after high-temperature annealing. Tungsten oxide (WO3) volatilizes slightly from the surface of T-111 at 990 C. The vaporization of WO3 has no apparent affect on the doping reaction.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Oxidation of Metals; 10; Oct. 197
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  • 98
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    Monitoring crack extension in fracture toughness tests by ultrasonics (1976)
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    Publikationsdatum: 2011-08-17
    Beschreibung: An ultrasonic method was used to observe the onset of crack extension and to monitor continued crack growth in fracture toughness specimens during three-point bend tests. A 20-MHz transducer was used with commercially available equipment to detect average crack extension less than 0.09 mm. The material tested was a 300-grade maraging steel in the annealed condition. A crack extension resistance curve was developed to demonstrate the usefulness of the ultrasonic method for minimizing the number of tests required to generate such curves.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of Testing and Evaluation; 4; Nov. 197
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  • 99
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    Alloy softening in binary iron solid solutions (1976)
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    Publikationsdatum: 2011-08-16
    Beschreibung: An experimental study was conducted to determine whether alloy softening in Fe alloys is dependent on electron concentration and to provide a direct comparison of alloy softening and hardening in several binary Fe alloy systems having the same processing history. Alloy additions to Fe included the elements in the Periods 4-6 and the Groups IV-VIII with the exception of technetium. A total of 19 alloy systems was investigated, and hardness testing was the primary means of evaluation. Testing was carried out at four temperatures over a homologous temperature range of 0.043-0.227 times the absolute melting temperature of unalloyed Fe. Major conclusions are that the atomic radius ratio of solute-to-Fe is the key factor in controlling low-temperature hardness of the binary Fe alloys and that alloy softening rates at 77 K and alloy hardening rates at 411 K are correlated with this atomic radius ratio for 15 of the binary alloy systems. Mechanisms of alloy softening and hardening are proposed.
    Schlagwort(e): METALLIC MATERIALS
    Materialart: Journal of the Less-Common Metals; 48; Aug. 197
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  • 100
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    Local and large scale galactic gamma-ray emission (1976)
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    Publikationsdatum: 2011-08-16
    Beschreibung: A study of the gas-to-dust ratio suggests that interstellar reddening may provide an accurate way of assessing column densities in various directions in the Galaxy. A gamma ray intensity of 7.25 x 10 to the -5th E sub B-V photon/sq cm/s/sterad is predicted for regions of the Galaxy where the medium cosmic ray density is equal to that observed close to the sun. It is found that in the longitude range of about 0-180 degrees, the large scale cosmic ray distribution producing the gamma rays follows that of extreme population I stars put in evidence by giant H II regions, and that of molecular hydrogen traced by carbon monoxide emission. The gamma-ray production exhibits a maximum at R roughly equal to 5 kpc, and practically vanishes at R not less than 11 kpc, beyond the location of the outermost H II regions.
    Schlagwort(e): SPACE RADIATION
    Materialart: Astronomy and Astrophysics; 50; 2, Ju; July 197
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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