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  • Other Sources  (7)
  • 1
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    Layer tracking, asymptotics, and domain decomposition (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: A preliminary report is presented on the work on the tracking of internal layers in a singularly-perturbed convection-diffusion equation. It is shown why such tracking may be desirable, and it is also shown how to do it using domain decomposition based on asymptotic analysis.
    Keywords: NUMERICAL ANALYSIS
    Type: ICASE, Proceedings for the ICASE Workshop on Heterogeneous Boundary Conditions; p 28-43
    Format: application/pdf
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  • 2
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    Performance of an electrochemical device for simultaneous carbon dioxide removal and oxygen generation. (1966)
    In:  Other Sources
    Details
    Publication Date: 2019-05-30
    Description: Continuous flow, solid state electrochemical device for simultaneous carbon dioxide removal and oxygen generation
    Keywords: BIOTECHNOLOGY
    Type: AICE PREPRINT 47E , /AMERICAN INST. OF CHEMICAL ENGINEERS
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  • 3
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    Curved focal plane arrays (2003)
    In:  Other Sources
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    Publication Date: 2018-06-08
    Type: 2003 IEEE Workshop on CCDS and Advanced Image Sensors; Schlous; Germany
    Format: text
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  • 4
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    Amino acids in a Fischer Tropsch type synthesis (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: One postulation is described for the presence of organic compounds in meteorites which states that they were formed during the condensation of the solar nebula. A viable laboratory simulation of these conditions can be modeled after the industrial Fischer Tropsch reaction, which is known to produce organic compounds called hydrocarbons. In this simulation, a mixture of carbon monoxide, hydrogen and ammonia is heated in the presence of iron meteorite. The reaction products for amino acids, a class of organic compounds important to life, were examined. A large number of these compounds is found in meteorites and other chemical evolution experiments, but only small quantities of a few amino acids were found in the present simulation work. These results are at odds with the existing literature in which many amino acids were reported.
    Keywords: SPACE BIOLOGY
    Type: NASA-TM-X-62411 , A-5909
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  • 5
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    Direct system parameter identification of mechanical structures with application to modal analysis (1982)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: In this paper a method is described to estimate mechanical structure characteristics in terms of mass, stiffness and damping matrices using measured force input and response data. The estimated matrices can be used to calculate a consistent set of damped natural frequencies and damping values, mode shapes and modal scale factors for the structure. The proposed technique is attractive as an experimental modal analysis method since the estimation of the matrices does not require previous estimation of frequency responses and since the method can be used, without any additional complications, for multiple force input structure testing.
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA PAPER 82-0767 , In: Structures, Structural Dynamics and Materials Conference; May 10, 1982 - May 12, 1982; New Orleans, LA
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  • 6
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    A mass additive technique for modal testing as applied to the Space Shuttle ASTRO-1 payload (1988)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Traditionally, a fixed base modal test has been performed as a means of verifying the coupled loads math model for Space Shuttle flight payloads. An alternate method, a free-free configured payload using mass loaded boundary conditions, is presented as a means of verifying the coupled loads model of the ASTRO-1 flight payload. This method allows evaluation of the influence of local load paths into the frequency range of the free-free test. The method is cost effective and does not contaminate the modal test results with fixture coupled modes or boundary condition uncertainties. This paper describes the mass additive modal test technique as applied to the Space Shuttle ASTRO-1 flight payload.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: International Modal Analysis Conference; Feb 01, 1988 - Feb 04, 1988; Kissimmee, FL; United States
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  • 7
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    Multiple-input experimental modal analysis (1985)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: The development of experimental modal analysis techniques is reviewed. System and excitation assumptions are discussed. The methods examined include the forced normal mode excitation method, the frequency response function method, the damped complex exponential response method, the Ibrahim time domain approach, the polyreference approach, and mathematical input-output model methods. The current trend toward multiple input utilization in the estimation of system parameters is noted.
    Keywords: STRUCTURAL MECHANICS
    Type: Experimental Techniques (ISSN 0732-8818); 9; 16s-23s
    Format: text
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