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  • Studies of the radiance of metal grinding sparks

    Creator:
    Kelley, John E.
    Abstract:
    A method for measuring the spark-shower radiance of metals when abraded on an abrasive grinding wheel was developed for evaluating their sparking tendency. One hundred metals were tested and rated relative to commercially pure iron. The radiance was measured in units of energy per solid angle per area of the...
    Resource Type:
    Masters Thesis
    Full Text:
    Institute, 22nd Annual Meeting, San Francisco, 1941. p. 54-56. 3. Blickensderfer, R. , J. E. Kelley, D. K

  • 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:
    . John P. Kelley for his helpful guidance during this study. Thanks are expressed to Dr. E. D. Trout for

  • 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:
    strips (c) BNC connector (d) Copper wire extension of BNC (e) Base plate (f) Chamber mount (spray-can lid

  • 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:
    kvp x-rays. Radiology 74: 743-752. 1960. 11. Cormack, D. V. and H. E. Johns. Spectral distribution of

  • 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:
    during this study. Dr. E. D. Trout deserves a special word of thanks for his guidance and helpful

  • 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

  • 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

  • Using a single-well push-pull test to estimate mass transfer rate parameters

    Creator:
    Kelley, Michael John
    Abstract:
    More efficient methods are needed for the in-situ evaluation of mass transfer parameters which describe the movement of solutes through aquifer material. The objective of this study was to develop a method for estimating diffusion rate and capacity coefficients using a single-well, "push-pull" tracer test. The method consists of the...
    Resource Type:
    Masters Thesis
    Full Text:
    rate parameters AN ABSTRACT OF THE THESIS OF Michael John Kelley for the degree of Master of Science

  • Multipartner Planning for Sustainability: The Pittsburgh Urban Forest

    Creator:
    Kelley, Michael Patrick
    Abstract:
    The City of Pittsburgh, formerly the capital of the American steel industry, suffered economic and social collapse in the late 1980s and 1990s. Since then, it has experienced an economic renaissance supported by the tech and medical care industries. However, despite the surprising recovery of the city, collapsed tax bases...
    Resource Type:
    Capstone Project
    Full Text:
    urban forest Michael Kelley MULTIPARTNER PLANNING FOR SUSTAINABILITY: THE PITTSBURGH

  • 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