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Filtering by: Creator Kelley, Deborah S. Remove constraint Creator: Kelley, Deborah S. Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • The design, construction and calibration of a low-energy, low exposure-rate ionization chamber

    Creator:
    Clarke, Arthur Porter
    Abstract:
    A low-energy, low-exposure-rate, guarded-field ionization chamber system with a sensitive volume of approximately 1040 cm³ and an exposure-rate range from 60 mR/h to less than 0.5 mR/h was designed, constructed and calibrated. The calibration was effected by constructing and calibrating a 60 cm³ volume transfer chamber of similar design against...
    Resource Type:
    Masters Thesis
    Full Text:
    IONIZATION CHAMBER Abstract approved: Redacted for Privacy John P. Kelley 3 A low-energy, low-exposure

  • The design and construction of an ionization chamber to measure background radiation

    Creator:
    Weaver, Kenneth Earl
    Abstract:
    An ionization chamber was constructed, using a fiberglass wall sphere, for the purpose of measuring background radiation. The system consists of the fiberglass wall chamber, 38.85 liters in volume, air filled, not sealed, used in conjunction with a precision capacitor, nulling voltage supply and electrometer. It was calibrated against a...
    Resource Type:
    Masters Thesis
    Full Text:
    RADIATION Abstract approved: Redacted for privacy John P. Kelley An ionization chamber was constructed

  • The distribution of leakage radiation from an unshielded diagnostic-type x-ray tube housing

    Creator:
    Gragg, Royce Lynn
    Abstract:
    The objective of this study was to determine the distribution of leakage radiation from two unshielded diagnostic-type X-ray tube housings. This information was used to determine the shielding required in the housings to bring them into compliance with the definition of a diagnostic-type protective tube housing, as set forth by...
    Resource Type:
    Masters Thesis
    Full Text:
    TUBE HOUSING Abstract approved: Redacted for Privacy John P. Kelley The objective of this study was

  • Pulse reader for ionization chambers

    Creator:
    Boothe, Gary F.
    Abstract:
    A pulse reader for ionization chambers has been developed, tested, and calibrated. An insulated gate field effect transistor (IGFET) was used to detect the pulses and Victoreen Model 362 Pocket Chambers were used as ionization chambers. The energy dependence of the Victoreen Model 362 Pocket Chamber was determined to be...
    Resource Type:
    Masters Thesis
    Full Text:
    for Ionization Chambers Redacted for PrivacyAbstract approved: John P. kelley /1 A pulse reader for

  • A study of the thermal characteristics of x-ray tube housings

    Creator:
    Stovall, John Walter
    Abstract:
    The relationship of x-ray tube housing temperature to duty cycle was studied for a superficial therapy x-ray installation, a dental radiographic installation, and a rotating-anode medical diagnostic installation. Thermistors were used to measure the tube housing temperature at points selected to be representative of thermal conditions on the surface of...
    Resource Type:
    Masters Thesis
    Full Text:
    ACKNOWLEDGMENT The author wishes to express his sincere appreciation to Mr. John P. Kelley for his guidance

  • Scattered radiation from bedside radiographic examinations

    Creator:
    Kellner, JoEllen Gretzinger
    Abstract:
    The purpose of this study was to investigate the distribution and magnitude of scattered radiation from a typical mobile radiographic examination as an aid in evaluating the potential health hazards of the scattered radiation. Also discussed are current radiation protection standards and recommendations for mobile radiography. A Manonite phantom represented...
    Resource Type:
    Masters Thesis
    Full Text:
    RADIATiUN FROM Bt D5IDE RADIOGRAPHIC EXAMINATIONS Abstract approved, Redacted for Privacy I. -Kelley The

  • Hemicellulose utilization by yeast for ethanol production- adaptation, effect of inhibitors and a flux balance based analysis

    Creator:
    Avanasi Narasimhan, Ragothaman
    Abstract:
    A major challenge in ethanol production using lignocellulosic feed stock is inefficient utilization of hemicellulose, which accounts for 30-40% of lignocellulosic biomass. Xylose, comprising >60% of recoverable sugars from hemicellulose is a major product of the hemicellulose hydrolysis. Utilization of this carbon source would significantly increase the ethanol yield from...
    Resource Type:
    Masters Thesis
    Full Text:
    guidance of Ganti S. Murthy, Frank W.R. Chaplen, Christine Kelley, Christopher Beatty and fellow graduate

  • The experience of alienation for males ages 16 - 19 from high school in the Pacific Northwest : A phenomenological inquiry

    Creator:
    Schulz, Lisa L.
    Abstract:
    This qualitative study examined the experiences and perceptions of males aged 16 – 19 who did not complete a traditional high school diploma program because of feeling alienated from the school system. Five participants described their school experiences from elementary school through the point in high school when they decided...
    Resource Type:
    Dissertation
    Full Text:
    approved: ___________________________________________________________ Deborah J. Rubel This

  • Stream channel stability and sensitivity to landscape history and land use changes in Kelley Creek, Portland, Oregon

    Creator:
    Murphy, Yarrow M.
    Abstract:
    This study examines stream channel erosion processes in a small urbanizing watershed influenced by deposits of the Columbia Basin catastrophic floods: Kelley Creek, a 12-km² tributary of Johnson Creek, located just east of Portland, Oregon. Information on landscape history, stream channels, and sediment dynamics was compiled. The effects of future...
    Resource Type:
    Masters Thesis
    Full Text:
    Landscape History and Land Use Changes in Kelley Creek, Portland, Oregon. Abstract approved

  • Dechlorination of p-chlorophenol on palladium based metal support catalyst

    Creator:
    Moore, Kelley A.
    Abstract:
    Disposal of chlorinated hydrocarbons is a major environmental concern due to the lack of a satisfactory means of safe remediation at all contaminated locations. Current technologies rely primarily on incineration, a process that can lead to dangerous byproducts such as dioxin. If the chlorine substituent can be removed prior to...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Kelley A. Moore for the degree of