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Filtering by: Alternative title ssim Report no. 74-16 Remove constraint Alternative title ssim: Report no. 74-16 Decade 1980-1989 Remove constraint Decade: 1980-1989 Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Chromium (VI) sorption in soils : chemical behavior and solute transport modeling

    Creator:
    Schroth, Martin Herbert
    Abstract:
    Chromium spills on soils are causing severe groundwater contamination problems. To increase the performance of cleanup methods, the chemical behavior of chromium in soils and its transport through soils have to be understood. The objectives of this research were to investigate the sorption characteristics of chromium(VI) in soil and to...
    Resource Type:
    Masters Thesis
    Full Text:
    Pore volume Initial pH Extractant no ml conc. mg/1 4 24.3 14.6 7.00 Distilled water 16 Analytical

  • Random wave forces on cylinders

    Creator:
    Hsu, Ming-kuang
    Abstract:
    The in-line force power spectrum is predicted by the frequency domain maximum force coefficient [C[subscript μn](z,f[subscript n])] vs. Keulegan-Carpenter number [K[subscript n] (z,f[subscript n])] relationship. The frequency domain Keulegan- Carpenter number is defined as the velocity from the amplitude spectrum at f divided by the respective frequency and diameter of...
    Resource Type:
    Dissertation
    Full Text:
    16, 1986. Title: Random Wave Forces on Cylinders Abstract approved: Redacted for Privacy John H

  • Analysis of dichotomous response models for low-dose carcinogenic risk estimation

    Creator:
    Tabesh, Taraneh
    Abstract:
    Several dichotomous-response models of carcinogenesis are discussed and their implications for low-dose risk estimation are examined. In addition, a pharmacokinetic model incorporating non-linear kinetics is studied and the results are investigated with respect to multiple-pollutant exposures. None of these models appears to suggest the existence of "thresholds". The analysis of...
    Resource Type:
    Masters Thesis
    Full Text:
    in Civil Engineering presented on August 16, 1983. Title: ANALYSIS OF DICHOTOMOUS RESPONSE MODELS

  • Finite element analysis of wave-structure interactions in the time domain

    Creator:
    Lee, Jaw-fang
    Abstract:
    The time-domain simulation of wave-structure interactions using the finite element method is presented in this study. Combined initial and boundary value problems for diffraction and radiation of waves by large structures are posed. Linearized free surface boundary conditions are used, but motions of the structural boundaries compared to the wave...
    Resource Type:
    Dissertation
    Full Text:
    Philosophy in Civil Engineering presented on December 16, 1986. Title: FINITE ELEMENT ANALYSIS OF WAVE

  • Adsorption of hexavalent and trivalent chromium to a clayey silt soil : batch kinetic and equilibrium studies

    Creator:
    Bean, Gregory R.
    Abstract:
    Chromium, an element of widespread use, is toxic in some forms. Improper disposal of waste chromium products has resulted in contamination of many sites throughout the United States, including the United Chrome Products Superfund site in Corvallis, Oregon. A better understanding of chromium chemistry is needed to facilitate the remediation...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Chemistry 9 2.3 Cr(III) Chemistry 16 2.4 Oxidation/Reduction Chemistry 21 2.5 Adsorption Models 22 3

  • The analysis of directional wave spectra from current and pressure measurements

    Creator:
    Lin, Li-hwa
    Abstract:
    Directional wave spectra have been estimated in this study based upon simultaneous subsurface measurements of current and pressure. Two previously developed methods, the stochastic and deterministic approaches, have been reviewed and restudied. It is demonstrated by means of the Correlation Theorem that the stochastic and deterministic approaches are, under certain...
    Resource Type:
    Masters Thesis
    Full Text:
    Engineering in Civil Engineering presented on December 16, 1983 Title: THE ANALYSIS OF DIRECTIONAL WAVE

  • Evaluation of selected marginal aggregates stabilized with cement

    Creator:
    Chang, Chen
    Abstract:
    Coastal Oregon is deficient in quality construction aggregate. There is, however, an abundance of lower quality, or marginal aggregate available for construction purposes. The purpose of this report is to develop techniques for upgrading marginal aggregates with portland cement and methods for evaluating the relative performance of these stabilized materials...
    Resource Type:
    Masters Thesis
    Full Text:
    aggre- gate available for construction purposes. The purpose of this report is to develop techniques

  • Properties of marginal aggregates treated with asphalt emulsion

    Creator:
    Evans, Gary L.
    Abstract:
    The purpose of this report is to address the problem of supplying construction aggregates to Oregon's coastal areas that are currently, or will in the near future, be deficient of good quality materials. This is done primarily by studying methods of utilizing marginal aggregates that are abundantly available in the...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract Approved: Redacted for Privacy Dr. R. pary Hicks The purpose of this report is to address the

  • Bacterial toxicity and metabolism of three hydrazine fuels

    Creator:
    Kane, Donald A.
    Abstract:
    Hydrazine based fuels are used by the Air Force for the Titan II and Minuteman III missiles and the F-16 aircraft and by the National Aeronautics and Space Administration for propulsion systems and the Space Shuttle Program. These uses represent significant production, transportation and storage of these fuels, and, as...
    Resource Type:
    Dissertation
    Full Text:
    II and Minuteman III missiles and the F-16 aircraft and by the National Aeronautics and Space

  • Development of a method to elucidate biodegradation pathways of chlorinated one and two carbon compounds using a gas-permeable-membrane-supported methylotrophic biofilm

    Creator:
    Ryan, Kelly M.
    Abstract:
    A gas-permeable-membrane-supported (GPMS) biofilm consisting of methylotrophic bacteria was effective in degrading chlorinated methanes, ethanes, and ethenes. The biofilm was developed on a gas-permeable fabric (Goretex, W.L.Gore & Associates, Elkton, Maryland) that divided a reactor vessel into a liquid compartment and a gas compartment. Goretex is a nylon-backed teflon mesh...
    Resource Type:
    Masters Thesis
    Full Text:
    reactors. No metabolic products were detected, but it is apparent that the degradation rates of any