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  • Other Sources  (4)
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  • 1
    Publication Date: 2017-06-27
    Description: Propagation of Love waves in layers with irregular boundaries studied by earth model in which half space is elastic
    Keywords: GEOPHYSICS
    Type: S-68-1 , NASA-CR-94362
    Format: application/pdf
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  • 2
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    In:  Other Sources
    Publication Date: 2011-08-16
    Description: Love wave propagation in layers with irregular boundaries, investigating scattered field to determine reflection from triangular notch
    Keywords: GEOPHYSICS
    Type: ; RNIER-POST (
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  • 3
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    Publication Date: 2019-01-25
    Description: Approach trajectories and guidance concepts for space shuttle approach and landing
    Keywords: NAVIGATION
    Type: SPACE SHUTTLE TRAJECTORY MANAGEMENT, NAVIGATION, GUIDANCE, AND CONTROL DURING APPROACH AND LANDING MAY 1970 (SEE N70-34829 19-21)
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  • 4
    Publication Date: 2014-09-16
    Description: The discovery of broad P Cygni profiles in early type stars and the detection of X-rays emitted from the envelopes of these stars made it clear, that a considerable amount of mechanical energy has to be present in massive stars. An attack on the problem, which has proven successful when applied to late type stars is proposed. It is possible that acoustic waves form out of random fluctuations, amplify by absorbing momentum from stellar radiation field, steepen into shock waves and dissipate. A stellar atmosphere was constructed, and sinusoidal small amplitude perturbations of specified Mach number and period at the inner boundary was introduced. The partial differential equations of hydrodynamics and the equations of radiation transfer for grey matter were solved numerically. The equation of motion was augmented by a term which describes the absorption of momentum from the radiation field in the continuum and in lines, including the Doppler effect and allows for the treatment of a large number of lines in the radiative acceleration term.
    Keywords: ASTROPHYSICS
    Type: NASA. Goddard Space Flight Center The Origin of Nonradiative Heating(Momentum in Hot Stars; p 233-235
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