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Filtering by: Subject Space and time Remove constraint Subject: Space and time Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

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  • Automatic time correction for interconnected power system operation

    Creator:
    Thurein, Ingo Paul
    Abstract:
    The North American interconnected power systems continuously attempt to hold power system time as close to standard time as possible. All inherent problems associated with normal power system operation make this a difficult task. System time is presently allowed to deviate from standard time by up to two seconds before...
    Resource Type:
    Masters Thesis
    Full Text:
    . Present correction methods are manual, time consuming and add to existing operating problems which leads

  • Preliminary design and analysis of a rotating bubble membrane radiator for space-based nuclear power systems

    Creator:
    Webb, Brent Jonathan
    Abstract:
    The development of a novel high temperature space radiator is described. A Rotating Bubble Membrane Radiator (RBMR) combines the best features of heat pipes and droplet radiators while avoiding their negative attributes. The RBMR offers light weight, self deployment, ease of startup and its performance is less affected by acceleration....
    Resource Type:
    Masters Thesis
    Full Text:
    : PRELIMINARY DESIGN AND ANALYSIS OF A ROTATING BUBBLE MEMBRANE RADIATOR FOR SPACE-BASED NUCLEAR POWER SYSTEMS

  • Ultralight fabric reflux tube thermal vacuum testing

    Creator:
    Pauley, Keith Alan
    Abstract:
    Five Ultra light Fabric Reflux Tubes (UFRTs) were tested in a thermal vacuum chamber at the National Aeronautics and Space Administration's Johnson Space Center in September 1994. These test articles were design and fabricated by staff at the Pacific Northwest Laboratory, operated by Battelle Memorial Institute for the United States...
    Resource Type:
    Masters Thesis
    Full Text:
    National Aeronautics and Space Administration's Johnson Space Center in September 1994. These test

  • An analysis of the time spent by home management house students

    Creator:
    Horning, Pearl
    Resource Type:
    Masters Thesis
    Full Text:
    devoted to each house duty, and how the three home management houses compared as to amount of time

  • Nuclear design analysis of low-power (1-30 KWe) space nuclear reactor systems

    Creator:
    Gedeon, Stephen R.
    Abstract:
    Preliminary nuclear design studies have been completed on ten configurations of nuclear reactors for low power (1-30 kWe) space applications utilizing thermionic energy conversion. Additional design studies have been conducted on the TRICE multimegawatt in-core thermionic reactor configuration. In each of the cases, a reactor configuration has been determined which...
    Resource Type:
    Masters Thesis
    Full Text:
    Research Center, National Aeronautics and Space Administration. Finally, I would like to acknowledge the

  • Modeling phosphor space charge in alternating-current thin-film electroluminescent devices

    Creator:
    Keir, Paul D.
    Abstract:
    The accomplishments presented in this thesis are the development of three models for simulation of space charge generation in the phosphor layer of alternating current thin-film electroluminescent (ACTFEL) devices and the results from simulation of these models. First, a single sheet charge model is developed and simulated. The single sheet...
    Resource Type:
    Masters Thesis
    Full Text:
    model and all subsequent models, space charge creation is assumed to occur by field emission from bulk

  • System modeling and reactor design study of an advanced incore thermionic space reactor

    Creator:
    Lee, Hsing Hui
    Abstract:
    Incore thermionic space reactor design concepts which operate at a nominal power output range of 20 to 50 kWe are described. Details of the neutronic, thermionic, thermal hydraulics and shielding performance are presented. Due to the strong absorption of thermal neutrons by natural tungsten, and the large amount of that...
    Resource Type:
    Masters Thesis
    Full Text:
    nuclear reactor systems for space applications. The code modules include neutronics and core criticality

  • Development of systems analysis program for space reactor studies

    Creator:
    Lewis, Bryan R.
    Abstract:
    An overall systems design code was developed to model an advanced in-core thermionic energy conversion based nuclear reactor system for space applications at power levels of 10 to 50 kWe. The purpose of this work was to provide the overall shell for the systems code and to also provide the...
    Resource Type:
    Masters Thesis
    Full Text:
    ] has been highly successful in developing a feasible and reliable system for use in high power space

  • Preschooler's perceptions of a patio garden

    Creator:
    Upington, Deborah A.
    Abstract:
    This study sought to fill a void in research literature supporting Attention Restoration Theory (ART) and the beneficial effects of exposure to natural, green spaces. The literature predominantly discusses studies with adult and older child participants, finding that exposure to natural environments often produces an attention-restoring effect. ART has been...
    Resource Type:
    Masters Thesis
    Full Text:
    perceptions and reactions to the garden space. Children were randomly selected to begin their interviews in

  • Amorphous oxide semiconductor thin-film transistor ring oscillators and material assessment

    Creator:
    Sundholm, Eric Steven
    Abstract:
    Amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) constitute the central theme of this thesis. Within this theme, three primary areas of focus are pursued. The first focus is the realization of a transparent three-stage ring oscillator with buffered output and an output frequency in the megahertz range. This leads to...
    Resource Type:
    Masters Thesis
    Full Text:
    fastest oxide electronics ring oscillator reported, with an output frequency of 2.16 MHz, and a time