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  • 1
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    ISO observations of Titan with SWS/grating (1997)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: The observations of Titan performed by the Infrared Space Observatory (ISO) short wavelength spectrometer (SWS), in the 2 micrometer to 45 micrometer region using the grating mode, are reported on. Special attention is given to data from Titan concerning 7 micrometer to 45 micrometer spectral resolution. Future work for improving Titan's spectra investigation is suggested.
    Keywords: Astrophysics
    Type: Proceedings of the 1st ISO Workshop on Analytical Spectroscopy; 255-258; ESA-SP-419
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Optimum shell design. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Comparison of two methods, namely Nedler and Mead's (1965) simplex method and Davidon's (1959) variable metric method, for achieving optimum design in terms of minimum weight for rotational shells under certain constraints. The superiority of one of the methods over the other is shown to depend, among other things, upon the form of the function to be minimized, and whether or not it is continuous everywhere in values and derivatives.
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA Journal; 11; Mar. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    On the dynamic stability of multilayer sandwich plates (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Study of the dynamic stability of plates which are constructed of several alternating soft and hard layers and are subjected to time-dependent periodic in-plane loads. A theory that accounts for all of these effects is presented for multilayer sandwich plates. The plate thickness consists of (k - 1) orthotropic soft core layers sandwiched between k hard isotropic membrane layers, each of which may have a different thickness and elastic properties. It is assumed that the core layers carry only the transverse shear stresses, while the hard membrane layers carry the in-plane normal and shear stresses. The complementary variational principle for dynamics is used to derive the governing differential equations and the necessary boundary conditions for the dynamic stability of the sandwich plate. The equations governing the vibration of the plate and those governing its static stability are deduced from the more general equations for dynamic stability.
    Keywords: STRUCTURAL MECHANICS
    Type: Journal of Structural Mechanics; 2; 4, 19; 1973
    Format: text
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    NASA TECHNICAL REPORTS
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