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Filtering by: Creator Yasuda, Dean D. Remove constraint Creator: Yasuda, Dean D. Committee Member Jansen, Henri Remove constraint Committee Member: Jansen, Henri Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • Scanning photocurrent microscopy study of photovoltaic and thermoelectric effects in individual single-walled carbon nanotubes

    Creator:
    DeBorde, Tristan
    Abstract:
    Carbon Nanotubes are a unique family of nanostructures that have shown remarkable promise for mechanical, electrical, and optical applications. Fundamentally similar to the earlier discovered Buckminsterfullerene (C₆₀), carbon nanotubes are hollow cylinders formed from a single sheet of carbon atoms. The research presented in this dissertation investigates several carbon nanotube...
    Resource Type:
    Dissertation
    Full Text:
    : __________________________________________________ Ethan D. Minot Carbon Nanotubes are a unique family of nanostructures that have shown

  • Use of BC-523a liquid scintillator for simultaneous neutron spectroscopy and gamma counting with the implementation of a neutron history reconstruction algorithm

    Creator:
    Frey, Wesley D.
    Abstract:
    Real-time, high efficiency neutron spectroscopy has, historically, been a persistent challenge in the field of radiation detection and, for the most part, has gone unsolved. The most promising method to resolve this challenge, is the boron-capture technique using an organic scintillation system (BC-523a). Detectors that utilize this method possess an...
    Resource Type:
    Dissertation
    Full Text:
    ABSTRACT OF THE DISSERTATION OF Wesley D. Frey for the degree of Doctor of Philosophy in Radiation

  • Experimental Investigation of the Transition to Natural Convection in HTGR Applications using the Oregon State SFSETF

    Creator:
    Fishler, Joshua D.
    Abstract:
    High Temperature Gas Reactors (HTGRs) are positioned to disrupt local and global markets via their unique ability to produce carbon-free process heat, high efficiency power generation, and passively safe operational features. However, significant impediments still exist to delay deployment of this particular technology, including a lack of experimental data, verified...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Joshua D. Fishler

  • Community Colleges Creating Academic Programming for Rural Areas

    Creator:
    Garcia-Chitwood, Jean
    Abstract:
    Community colleges serve various populations as part of their missions. Many community colleges serve the people who live in rural communities and are challenged with fewer financial resources. The term rural is not easily defined, and many variables need to be considered when creating academic programming for rural populations. There...
    Resource Type:
    Dissertation
    Full Text:
    instruction/student services provost, division dean, director, and department chair within the college

  • Nonlinear terahertz spectroscopy of carbon nanomaterials and semiconductor nanostructures

    Creator:
    Paul, Michael Jason
    Abstract:
    This thesis will cover my work relating to the developing field of terahertz (THz) science and technology. It will present experimental and theoretical studies investigating the optical and electrical properties of various material systems using novel THz imaging and spectroscopy techniques. Due to its low photon energy, THz imaging and...
    Resource Type:
    Dissertation
    Full Text:
    : Major Professor, representing Physics Chair of the Department of Physics Dean of the Graduate School

  • Simultaneous beta/gamma digital spectroscopy

    Creator:
    Farsoni, Abdollah T.
    Abstract:
    A state-of-the-art radiation detection system for simultaneous spectroscopy of beta-particles and gamma-rays has been developed. The system utilizes a triplelayer phoswich detector and a customized Digital Pulse Processor (DPP) built in our laboratory. The DPP board was designed to digitally capture the analog signal pulses and, following several digital preprocessing...
    Resource Type:
    Dissertation
    Full Text:
    Nuclear Engineering and Radiation Health Physics Dean of the Graduate School I

  • Modeling Flow and Transport at Pore Scale with Obstructions

    Creator:
    Umhoefer, Joseph G.
    Abstract:
    In this thesis we study mathematical and computational models for phenomena of flow and transport in porous media in the presence of changing pore scale geometries. The differential equations for the flow and transport models at Darcy scale involve the coefficients of permeability, porosity, and tortuosity which depend on the...
    Resource Type:
    Dissertation
    Full Text:
    Mathematics Dean of the Graduate School I understand that my thesis will become part of the permanent

  • Ocean surface wind divergence and vorticity co-variability and statistical differences between QuikSCAT and ERA5

    Creator:
    Jacobs, Robert
    Abstract:
    I examine the strong co-variability between the surface divergence and vorticity and how it varies with latitude in the Pacific Ocean using surface vector winds from reanalysis and satellite scatterometer observations. This analysis was motivated in part by a significant correlation between divergence and vorticity over the global oceans that...
    Resource Type:
    Dissertation
    Full Text:
    Head of the Department of Physics Dean of the Graduate School I

  • Nonlinear Terahertz Spectroscopy and imaging of Carbon Nanomaterials

    Creator:
    Lee, Byounghwak
    Abstract:
    This dissertation presents nonlinear terahertz (THz) properties of carbon nanomaterials investigated by time-resolved high-field THz spectroscopy. In order to determine THz characteristics of nanomaterials, we performed THz power spectrum measurement, THz raster imaging, THz time-domain spectroscopy (THz-TDS) and time-resolved pump-probe experiment on two different types of single layer graphene and...
    Resource Type:
    Dissertation
    Full Text:
    , representing Physics Chair of the Department of Physics Dean of the Graduate

  • Optoelectronic properties of organic semiconductor materials : from bulk to single molecule

    Creator:
    Shepherd, Whitney E. B.
    Abstract:
    The behavior and application of organic semiconductor materials depend strongly on their molecular structure, and molecular interactions. Several studies of intermolecular interactions in functionalized polyacene materials are presented. The degree and onset of aggregation of a functionalized anthradithiophene derivative was studied as a function of concentration in two different host...
    Resource Type:
    Dissertation
    Full Text:
    Physics Chair of the Department of Physics Dean of the Graduate School I understand that my