Search Constraints

Start Over
Filtering by: Creator Poplawsky, Jonathan D Remove constraint Creator: Poplawsky, Jonathan D Committee Member Istok, Jonathan D. Remove constraint Committee Member: Istok, Jonathan D.

Search Results

  • 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:
    presented on August 16, 2012. Title: Removal of E. coli with Alternative Media Biosand Filters. Brian D

  • 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:
    Ellipsoid long axis length (m) Cd Drag coefficient d Sphere diameter (μm) g Gravitational

  • 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

  • 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:
    State Highway and Transportation Officials; 2019, pp. 7. 5. Robertson J. B., Ley M. T., Cook M. D

  • Bacterial hydrophobicity : assessment techniques, applications and extension to colloids

    Creator:
    Saini, Gaurav
    Abstract:
    This research details laboratory assessment of bacterial hydrophobicity, variations in bacterial adhesion properties with growth and extended starvation as well as extension of this assay to colloidal hydrophobicity measurement. Hydrophobicity is an integral component of surface interactions and has been studied extensively for its role in a number of engineering...
    Resource Type:
    Dissertation
    Full Text:
    , Applications and Extension to Colloids Abstract approved: Brian D. Wood This research

  • 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

  • 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

  • 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

  • An Experimental Study on Violent Geysers in Vertical Shafts

    Creator:
    Elayeb, Ibrahem S.
    Abstract:
    A Geyser in a stormwater (SW) and combined sewer system (CSS) is an oscillatory and violent release of a mixture of air and water through vertical shafts. Violent geysers are highly destructive. In the case of combined sewer systems, many municipalities operate their systems at a fraction of their maximum...
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.2 Geyser data for NR experiments (d = 6′′, d/D = 1, (No retrofitting)) . . . . . . 14 2.3

  • Transformation of Carbon Tetrachloride and Chloroform by Trichloroethene Respiring Anaerobic Mixed Cultures and Supernatant

    Creator:
    Vickstrom, Kyle E.
    Abstract:
    Carbon tetrachloride (CT) and chloroform (CF) were transformed in batch reactor experiments conducted with anaerobic dechlorinating cultures and supernatant (ADC+S) harvested from continuous flow reactors. The Evanite (EV-5L) and Victoria/Stanford (VS-5L) cultures capable of respiring trichloroethene (TCE), 1,2-cis-dichloroethene (cDCE), and vinyl chloride (VC) to ethene (ETH) were grown in continuous...
    Resource Type:
    Masters Thesis
    Full Text:
    anaerobic dechlorinating mixed culture enriched in D. mccartyi strains (Behrens et al., 2008; Marshall et