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Filtering by: Creator Rogers, David C, Remove constraint Creator: Rogers, David C, Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Effects of substrate interactions, toxicity, and bacterial response during cometabolism of chlorinted solvents by nitrifying bacteria

    Creator:
    Ely, Roger L.
    Abstract:
    Cometabolic biodegradation processes, important for bioremediation of hazardous waste sites, are not well understood and have not been modeled thoroughly. Toxic effects and bacterial responses to toxicity may change intracellular enzyme levels, rendering traditional enzyme kinetics models inappropriate. This document presents a novel cometabolic enzyme kinetics model that incorporates enzyme...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Roger L. Ely for the degree of Doctor of Philosophy in Civil Engineering presented on January

  • Transport and adsorption of proteinanceous particles during flow through porous media

    Creator:
    Yamamoto, Tokuo
    Abstract:
    This is a fundamental study of the mechanism of protein particle removal during flow through sandy soil. Mathematical models for diffusion-adsorption and diffusion-convection-adsorption processes were developed and compared with experimental data. An attempt was made to calculate the distance over which the adsorption forces act. The differential equation for the...
    Resource Type:
    Dissertation
    Full Text:
    , Dr. David A. Bella for his helpful advice in selecting courses relevant to this study, Dr. Roger D

  • Climate Change Impacts to Estuarine Hydrodynamics: Tools, Methodologies, and Predictions

    Creator:
    Parker, Kai A.
    Abstract:
    Coastal communities in the U.S. Pacific Northwest (PNW) are rapidly engaging with the idea that hazards and environmental pressures are changing and may be characteristically different in the near future. This has led to a need for scientific knowledge and tools that can help coastal communities prepare and build resilience...
    Resource Type:
    Dissertation
    Full Text:
    David F. Hill Coastal communities in the U.S. Pacific Northwest (PNW) are rapidly engaging with

  • Dynamic analysis of three-dimensional frames

    Creator:
    Scholl, Roger Edwin
    Abstract:
    The response of three-dimensional frames subjected to an arbitrary dynamic force is studied. The method of mode superposition is used to obtain the frame response solution. Two different modeling systems are used to idealize the frame. These are the "discrete mass system" and the "continuous mass system." For an example...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE THESIS OF ROGER EDWIN SCHOLL for the

  • Startup and performance of a gas-permeable-membrane-supported (GPMS) biofilm system using a mixed culture of methylotrophs to degrade methylene chloride, chloroform, and carbon tetrachloride

    Creator:
    Ely, Roger L.
    Abstract:
    The methane monooxygenase (MMO) enzyme, used by methylotrophs to oxidize methane, has been shown to possess quite broad substrate specificity, being able to oxidize many organic compounds including n-alkanes, n-alkenes, ethers, and aromatic, alicyclic, and heterocyclic compounds. In this research, it was sought to determine whether a gas-permeable-membrane-supported (GPMS) biofilm...
    Resource Type:
    Masters Thesis
    Full Text:
    , chloroform, and carbon tetrachloride AN ABSTRACT OF THE THESIS OF Roger L. Ely for the degree of Master of

  • Depth estimation and frontal imaging via X-band marine radar

    Creator:
    Honegger, David Andrew
    Abstract:
    This dissertation focuses on two core aspects of remote sensing: (a) interpretation of the remotely sensed data to identify and characterize sea surface features of interest, and (b) the quantitative analysis of previously characterized features to produce robust estimates of geophysical variables. Specifically, these aspects are addressed in the context...
    Resource Type:
    Dissertation
    Full Text:
    quasi-continuous marine radar image time series. c®Copyright by David Andrew Honegger March 12

  • Aircraft washrack wastes : their characteristics and treatment

    Creator:
    Evans, David Roland
    Abstract:
    Oils, greases, and grit which collect on an aircraft during flight are removed on the U. S. Air Force washracks using an alkaline, water-base cleaner. Waste-flows from these washracks may include in addition to free oils, emulsified oils, and alkaline, water-base cleaners several other constituents such as acid skin brightners,...
    Resource Type:
    Masters Thesis
    Full Text:
    treatment AN ABSTRACT OF THE THESIS OF DAVID ROLAND EVANSL 2ND LT., USAF for the Master of Science

  • Assessing the seismic performance of corroding RC bridge columns

    Creator:
    Guo, Yisen
    Abstract:
    Corrosion of reinforcement is recognized as the predominant factor that limits the service life of reinforced concrete (RC) structures exposed to aggressive environments. This corrosion deterioration can lead to damage resulting in capacity loss or even failure. For structures exposed to coastal marine environments or deicing or anti-icing applications, this...
    Resource Type:
    Masters Thesis
    Full Text:
    : ________________________________________________________ David Trejo

  • In situ measurement of the benthal oxygen requirements of tidal flat deposits

    Creator:
    Crook, Gene Ray
    Abstract:
    In situ light and dark planktonic and benthal respirometers were used to measure the oxygen requirements of Yaquina estuary water and benthal deposits. Respirometer devices were constructed so that actual conditions of mixing could be simulated and benthal deposit disturbance would be minimized. A mathematical model of a benthal respirometer...
    Resource Type:
    Masters Thesis
    Full Text:
    THE BENTHAL OXYGEN REQUIREMENTS OF TIDAL FLAT DEPOSITS Abstract approved: Dr. David A. Bella In

  • Spatial, diel and seasonal variations in dissolved oxygen and temperature within a stratified lake

    Creator:
    Smith, Stanley Allan
    Abstract:
    Spatial, diel and seasonal variations in dissolved oxygen and temperature were measured in Triangle Lake, Oregon. Spatial dissolved oxygen and temperature variations measured in the stratified lake are presented to illustrate the horizontal uniformity of the lake and to demonstrate the applicability of the one dimensional assumption for sampling and...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for Privacy Dr. David A. Bella Spatial, diel and seasonal variations in dissolved