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  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (3)
  • Condensed Matter: Electronic Properties, etc.  (1)
  • 1
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    Consequences of Broken Translational Symmetry in FeSexTe1−x (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-02-26
    Description: Author(s): L. Moreschini, P.-H. Lin, C.-H. Lin, W. Ku, D. Innocenti, Y. J. Chang, A. L. Walter, K. S. Kim, V. Brouet, K.-W. Yeh, M.-K. Wu, E. Rotenberg, A. Bostwick, and M. Grioni We investigate the consequences of broken translational symmetry in the superconductor FeSexTe1−x using angle-resolved photoemission spectroscopy. We find that the intensity does not follow the periodicity dictated by the crystal structure, owing to the form of the perturbing potential and the symme... [Phys. Rev. Lett. 112, 087602] Published Tue Feb 25, 2014
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 2
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    Adsorbent testing and mathematical modeling of a solid amine regenerative CO2 and H2O removal system (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The paper examines the design and the construction details of the test bed built for testing a solid-amine-based Regenerable CO2 Removal System (RCRS) built at the NASA/Johnson Space Center for the extended Orbiter missions. The results of tests are presented, including those for the adsorption breakthrough and the adsorption and desorption of CO2 and H2O vapor. A model for predicting the performance of regenerative CO2 and H2O vapor adsorption of the solid amine system under various operating conditions was developed in parallel with the testing of the test stand, using the coefficient of mass transfer calculated from test results. The results of simulations are shown to predict the adsorption performance of the Extended Duration Orbiter test bed fairly well. For the application to the RCRS at various operating conditions the model has to be modified.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 911364
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Performance and endurance testing of a prototype carbon dioxide and humidity control system for Space Shuttle extended mission capability (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: An advanced flight prototype regenerable CO2 and humidity control system was delivered to NASA-JSC in February 1980. It is pointed out that this system offers substantial weight savings compared with the Shuttle Orbiter expendable lithium hydroxide CO2 removal system for extended duration missions. The present paper provides a brief description of the 4- to 10-man regenerable CO2 and humidity control system. The potential advantages which can be realized for an extended duration Shuttle mission are considered along with the results of extensive testing conducted at JSC. The performance evaluation and endurance tests show that the system is capable of long-term operation (up to 60 days) without maintenance.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 851374
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Systems engineering aspects of a preliminary conceptual design of the space station environmental control and life support system (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The systems engineering aspects of developing a conceptual design of the Space Station Environmental Control and Life Support System (ECLSS) are discussed. Topics covered include defining system requirements and groundrules for approach, formulating possible cycle closure options, and establishing a system-level mass balance on the essential materials processed in oxygen and water cycles. Consideration is also given to the performance of a system trade-off study to determine the best degree of cycle closure for the ECLSS, and the construction of a conceptual design of the ECLSS with subsystem performance specifications and candidate concepts. For the optimum balance between development costs, technological risks, and resupply penalties, a partially closed cycle ECLSS option is suggested.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 831109
    Format: text
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    NASA TECHNICAL REPORTS
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