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Filtering by: Creator Hornung, Jonathan P. Remove constraint Creator: Hornung, Jonathan P. Committee Member Istok, Jonathan D. Remove constraint Committee Member: Istok, Jonathan D.

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  • Measuring and Correcting the Electrical Resistivity of Concrete Pore Solution in Fresh Mixtures

    Creator:
    Biever, Joseph H.
    Abstract:
    A vital aspect of concrete construction is quality assurance and control (QA/QC). Engineered structures must meet pre-determined and agreed-upon strength and durability requirements. Concrete falls into a specific category of infrastructure material because in most cases, these strength and durability requirements cannot be found until the material has at least...
    Resource Type:
    Masters Thesis
    Full Text:
    (") is the volume fraction, and 𝛽(") is the connectivity parameter of each phase (p). Each phase of a

  • Simulation of drag reduction due to multi-aligned spheres

    Creator:
    Lindqvist, Varna
    Abstract:
    A method was sought to predict the flight paths and collisions for closely spaced ink droplets of various sizes as a design aid for ink-jet printing development. Computational fluid dynamics models of two rigid aligned spheres, as a proxy for ink droplets, were initiated in atmospheric pressure air at constant...
    Resource Type:
    Masters Thesis
    Full Text:
    Mass (kg) M Slope in equation for Φ ng Nanograms p Pressure (Pa) Re Reynolds number  Ud

  • Hydraulic influences on pool morphology : a laboratory investigation

    Creator:
    Frizenschaf, Jacqueline
    Abstract:
    A flume study was conducted to investigate the influences of changing hydraulic conditions on the bed morphology of a scoured pool. During a simulated storm runoff event, responses of the pool were tested under different conditions: clearwater flow, sediment supply at steady rates, and two different sediment mixtures of the...
    Resource Type:
    Masters Thesis
    Full Text:
    examination committee members Dr. Robert L. Beschta and Dr. Jonathan D. Istok, who both helped me to further

  • Removal of E. coli with alternative media Biosand filters

    Creator:
    Fulton, Nathan J.
    Abstract:
    When Biosand filters cannot be constructed with crushed quarry rock due to resource limitations, a suitable alternative filter media is needed. In this research, two crushed quarry rock alternatives were examined. Three bench-scale Biosand filters with crushed rock, beach sand, and heat-treated beach sand media were simultaneously dosed with Willamette...
    Resource Type:
    Masters Thesis
    Full Text:
    than beach sand (P < 0.001) and heat-treated beach sand (P < 0.001) Abstract approved

  • Measurement of the rates of reductive dechlorination of chlorinated phenols

    Creator:
    Nicholson, David K.
    Abstract:
    Knowledge of a compound's degradation pathway is crucial to the assessment of risk at contaminated sites. Pentachlorophenol and its metabolic products can serve as model compounds to study the fate and transport of halogenated aromatic compounds in the environment. Acclimation of anaerobic sewage sludge to pentachlorophenol produced a microbial consortium...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members Drs. Jonathan D. Istok, Kenneth J. Williamson, and Philip E. Humphrey. Funding for this

  • Development of a personal computer-based reactivity meter for a research reactor

    Creator:
    Bakir, Alla J. M.
    Abstract:
    A personal computer with a Data Acquisition and Control Adapter interface has been used to monitor the power of the Oregon State University TRIGA Reactor, and from the time behavior of the reactor power the reactivity has been computed using the point kinetics equations and displayed on a digital read-out...
    Resource Type:
    Masters Thesis
    Full Text:
    thankful to my committee, Dr. Andrew C. Klein, professor Donald L. Amort, and Dr. Jonathan D. Istok. A

  • Evaluation of copper removal from stormwater runoff using compost and Apatite II™

    Creator:
    Silvertooth, Jason R.
    Abstract:
    Low concentrations of dissolved copper have proven to be harmful to a number of aquatic organisms, with recent research highlighting detrimental effects to endangered salmonid species. Stormwater runoff can represent a significant source of copper to surface waters, necessitating cost-effective alternatives to current stormwater best management practices (BMPs). This study...
    Resource Type:
    Masters Thesis

  • Interactive Genetic Algorithms for watershed planning : an investigation of usability and human-centered design

    Creator:
    Piemonti, Adriana Debora
    Abstract:
    Degradation of watersheds is a major concern in areas where adverse climate effects and unsustainable use of the natural resources have caused extensive stresses to watershed systems (e.g., increased floods, increased droughts, worsened in-stream water quality) through the years. While considerable efforts are being made to generate technical solutions that...
    Resource Type:
    Dissertation
    Full Text:
    of my own cool version of uncles :P. Love u guys, and THANKS for all the memories

  • Elemental analysis of zircon samples from Pacific northwest beaches by INAA

    Creator:
    Azim, Bilqees
    Abstract:
    Fifteen sand samples from beaches along the Pacific North were analyzed for their elemental content by the method of instrumental neutron activation analysis (INAA). A separation technique was employed to separate the zircon (a heavy non-magnetic mineral with a specific gravity of 4.67) from the rest of the sample. This...
    Resource Type:
    Masters Thesis
    Full Text:
    . I am very thankful to my committee, Dr Roman A. Schmitt, Dr. Andrew C.Klein, and Dr. Jonathan D

  • Copper Speciation in Wastewater-Impacted Surface Waters

    Creator:
    Mosbrucker, Ariel M.
    Abstract:
    This study investigates the relationship between total and ionic copper in samples taken from the Tualatin River and wastewater treatment facilities (WWTFs) that discharge into the Tualatin River. Copper speciation was analyzed by determining conditional stability constants and densities of copper binding ligands on the dissolved organic matter (DOM) in...
    Resource Type:
    Masters Thesis