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Filtering by: Creator Baarda, Benjamin I. Remove constraint Creator: Baarda, Benjamin I. Academic Affiliation Civil Engineering Remove constraint Academic Affiliation: Civil Engineering

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  • Stability of elastically restrained framed structures by matrix analysis

    Creator:
    Albertson, Oran Lester
    Abstract:
    It has been undertaken here to use the matrix method of structural analysis for the determination of the stability of elastically restrained, simple portal frames. This involves the formulation of the stiffness matrix of the structure in terms of the axial force in the members. The stability criterion, when applied...
    Resource Type:
    Masters Thesis
    Full Text:
    their suggestions and assistance on the computer program. Special thanks to Dr. H. I, Laursen for his

  • Preparation and laboratory evaluation of stationary-phase iron-oxide-based adsorbents for removal of metals from waste waters

    Creator:
    May, Michael Lee
    Abstract:
    Several potential sorbent materials containing iron oxides were prepared and evaluated for potential to remove divalent metals from waste waters. These included a ferrihydrite-coated sand, maghemite incorporated in Dowex[Trademark] ion exchange resin, gothite and two thermally activated ferrihydrites. Attempts to prepare sorbents from steel shot by coating with ferrihydrite or...
    Resource Type:
    Masters Thesis
    Full Text:
    Engineering Head of Department of Civil, Construction and Environmental Engineering Dean ofiradate Sch I

  • A numerical model for the fate and transport of chlorinated phenols in groundwater

    Creator:
    Lee, Sang Bong
    Abstract:
    The objective of this study was to develop a numerical model for the movement and fate of chlorinated phenols in groundwater. In the first part, a numerical model for several different equilibrium and nonequilibrium sorption processes under isothermal conditions is developed for one-dimensional, steady-state water flow in soil columns. The...
    Resource Type:
    Dissertation
    Full Text:
    EDGEMENTS I would like to express my sincere gratitude to my advisor, Dr. Jonathan D. Istok. Throughout

  • Application of the generalized Melnikov method to weakly damped parametrically excited cross waves with surface tension

    Creator:
    Fadel, Suzan M.
    Abstract:
    The Wiggins-Holmes extension of the generalized Melnikov method (GMM) is applied to weakly damped parametrically excited cross waves with surface tension in a long rectangular wave channel in order to determine if these cross waves are chaotic. The Lagrangian density function for surface waves with surface tension is simplified by...
    Resource Type:
    Dissertation
    Full Text:
    of G duate School I understand that my thesis will become part of the permanent collection of Oregon

  • Biodegradation of chlorinated methanes using a methylotrophic/anaerobic biofilm reactor

    Creator:
    Celeste, Stephen J.
    Abstract:
    Chlorinated low molecular weight solvents have been discovered in a number of the nation's groundwater supplies. Remediation of these aquifers will require some form of treatment. Presently, the dominant treatment method is air stripping which results in transfer of the solvent from the aqueous phase into the atmosphere. Biodegradation is...
    Resource Type:
    Masters Thesis
    Full Text:
    Professor of Civil Engir4ring in charge of major I y Redacted for Privacy !lead of department of Civil -11

  • Cometabolic degradation of chlorophenolic compounds

    Creator:
    Wang, Gongming
    Resource Type:
    Dissertation
    Full Text:
    Engineering Dean of Gradu chool I understand that my thesis will become part of the permanent collection of

  • Estuarine sediment controls on trace metal distributions

    Creator:
    Davies-Colley, Robert J.
    Abstract:
    Sediments are the major compartment in aquatic environments for many materials of toxic or nutrient concern. The lack of knowledge of the phase associations of toxic metals in sediments is the largest deficiency in our understanding of the environmental hazard posed by metal contamination. This study examined the sedimentary partitioning...
    Resource Type:
    Dissertation
    Full Text:
    Systems 22 3.2 Cadmium Speciation in Artificial Seawater (35°/oo salinity, I = 0.67 M) 33 3.3 Cadmium

  • Sand waves in a pristine estuary

    Creator:
    Baliga, B. R. (B. Ravindranath)
    Abstract:
    The stochastic and the Fourier theories for sand waves developed by Lee(11) and Hino(6), respectively, for unidirectional flows are extended in order to estimate the rate of sediment turnover (RST) under oscillatory flows in the South Slough estuary, Coos Bay, Oregon. Data were collected by a mechanical and a sonic...
    Resource Type:
    Masters Thesis
    Full Text:
    Stochastic Analysis 36 6.2 Fourier Analysis 38 REFERENCES 41 APPENDICES I Derivation of "-3 power law

  • 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:
    ) ] -.)- (1'1 i[da(t)ei(it-s'.1.-°t)+da*(t)e-i(k. S1 -at) s2 ] (2.1) where n is water surface elevation, t is

  • A model for the prediction of biologically mediated reductive dechlorination pathways

    Creator:
    Cozza, Cynthia L.
    Abstract:
    The environment has been exposed to a number of hazardous chlorinated organic compounds. These compounds may be anaerobically biotransformed by sequential reductive dechlorination reactions in which the chlorine atoms are replaced with hydrogen atoms. Because reductive dechlorination processes may occur very slowly in the environment and chlorine position affects the...
    Resource Type:
    Masters Thesis
    Full Text:
    is presented March 16, 1990 ACKNOWLEDGEMENTS I would like to thank Duncan Mac Laren for sharing