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  • 1970-1974  (5)
  • 1
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] During February 1971, R/V Chain revisited the brine area. Although it will be several months before the chemical data are complete, the hydrographic data gathered are of immediate interest. The most unusual observation is that the temperature of the Atlantis II brine has risen 2.7 C from 56.5 C to ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 245-246 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A method of detecting galactic supernova remnants, using a radio telescope at a single frequency, would be to examine a large number of radio sources and then select those sources from the sample which do not exhibit radio recombination lines. Because of the weakness of the recombination lines (the ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 24 (1973), S. 755-767 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Es werden Lösungen dargestellt für die Antwort einer elektromagnetischen Katheterspitzen-Flussmessprobe auf den stationären Fluss einer inkompressiblen Newton'schen Flüssigkeit in einem kreiszylindrischen, starren Rohr. Die Messprobe ist ebenfalls von kreiszylindrischer Form und konzentrisch im Strömungsfeld positioniert. Ferner basieren die angegebenen Lösungen auf den Annahmen, dass die Messprobe eine isolierte Oberfläche besitzt und die Innenwand des Rohres entweder isoliert oder leitend ist. In dimensionsloser Darstellung kann das Flussmeterpotential als eine rein geometrische Funktion dargestellt werden, die stark von den geometrischen Parametern und den Randbedingungen des Rohres abhängt. Demzufolge müssen bei Verwendung der Probe in Gefässen mit verschiedenen Durchmessern eine individuelle Kalibration durchgeführt oder entsprechende Korrekturen gemacht werden.
    Notes: Abstract Solutions were obtained for the signal sensed by a catheter tip electromagnetic flowmeter probe including the effect of the velocity profile. The analytical model assumes steady, axial flow of an incompressible, Newtonian fluid between concentric cylindrical surfaces, which represent the probe within the vessel. The flowmeter equation was solved for insulated probe surface and two vessel boundary conditions, insulated or conducting inner surface of a rigid vessel. The resulting solutions were nondimensionalized yielding purely geometrical functions. These solutions indicate strong dependence of signal upon the geometry and vessel boundary conditions. Consequently, signals for perfusion of the larger arteries in the cardiovascular system may be sensitive to the geometry requiring individual calibration or corrections.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 248 (1974), S. 125-127 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Study of the isohaline patterns and of drifter movements shows that there is a residual flow of water from south to north in the Irish Sea system. It is, however, difficult to arrive at an accurate mean value for this flow because of the effects of turbulent mixing in modifying the isohaline ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 12 (1974), S. 1607-1618 
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dynamic mechanical properties have been determined and the β relaxation temperatures Tβ have been located for a series of copolymers of ethylene with norbornene, methylnorbornene, dicyclopentadiene, and octahydrodimethanonaphthalene. The Tβ values show discontinuous changes with changing comonomer content. The several levels of Tβ observed apparently can be associated with the sequence of close multiplets of norbornane moieties ranging from isolated units through pairs to triads and higher. For isolated norbornane units Tβ is around 10°C, while for pairs of these units, probably separated by a C2H4 unit, it is 55°C. The size of the norbornene-type comonomer has a small but measurable effect on these values of Tβ. The bearing of these results on the problem of defining a value of Tg for polyethylene is discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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