Search Constraints

Start Over
Filtering by: Creator Van Atta, Robert O. Remove constraint Creator: Van Atta, Robert O. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering Rights Statement Copyright Not Evaluated Remove constraint Rights Statement: Copyright Not Evaluated

Search Results

  • 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:
    AN ABSTRACT OF THE THESIS OF Robert J. Davies-Colley for the degree of Doctor of Philosophy in

  • Factors affecting the adsorption of heavy metals by activated sludge bacteria

    Creator:
    Conlin, Mary F.
    Resource Type:
    Masters Thesis
    Full Text:
    Metals by Activated Sludge Bacteria Abstract approved: Redacted for privacyPeter O. Nelson, M.S., Ph.D

  • 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:
    0 02- 00- O. 1.0 X I04M b. 1.0x10 -3M c. 60 x 10-3M I. HCr04- 2. CrO4a 3. H2Cr04 4. Cr2072 10

  • Application of quality function deployment in the conceptual design of a construction project

    Creator:
    Hinkle, Verda O.
    Abstract:
    Quality Function Deployment (QFD) is a product development process that assures the needs and desires of the customer are heard and heeded during the design, development and production of a product. Though it has been used successfully in other industries, only a few companies in the U. S. Engineering and...
    Resource Type:
    Masters Thesis
    Full Text:
    1977. "Between January 1977 and April 1984, Toyota Autobody introduced four new van-type vehicles

  • Biodegradability and oxygen uptake studies on resuspended estuarine bottom sediments

    Creator:
    Touhey, Robert James
    Abstract:
    A study was conducted to determine the oxygen uptake rate of resuspended estuarine bottom sediments and the biodegradability of the organic matter released during resuspension. Oxygen uptake was measured on a Gilson Differential Respirometer and the percent biodegradability was calculated by determining the soluble organic carbon on a Beckman Carbonaceous...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF ROBERT JAMES TOUHEY for the MASTER

  • Nonlinear diffraction theory by an eigenfunction expansion of the Green's function

    Creator:
    Chen, Min-Chu
    Abstract:
    A second-order nonlinear diffraction theory is developed for a large diameter circular cylinder under the action of surface gravity waves of finite amplitude in water of-finite depth. Boundary value problems are derived by using a perturbation expansion and the solutions for the diffracted waves are given in terms of Fredholm...
    Resource Type:
    Dissertation
    Full Text:
    EIGENFUNCTION EXPANSION OF THE GREEN'S FUNCTION Abstract approved: Redacted for Privacy V Dr. Robert T

  • 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:
    OF PROTEINACEOUS PARTICLES DURING FLOW THROUGH POROUS MEDIA Abstract approved: for Privacy Robert-W

  • The static and dynamic analysis of discretely represented moorings and cables by numerical means

    Creator:
    Dominguez, Richard Frank
    Abstract:
    Computer oriented techniques and procedures are presented for the analysis of single and multiple cable systems. Application is made to a two-point mooring system influenced by surface and subsurface hydrodynamic loading. The effects of the various parameters are presented and the numerical method is compared to exact solutions obtained from...
    Resource Type:
    Dissertation
    Full Text:
    MEANS Abstract approved: Redacted for privacy Robert W. Fliskier Computer oriented techniques and

  • Evaluation of alternate surfacing systems for temporary and intermittent use roads

    Creator:
    Takallou, Mojtaba B.
    Abstract:
    The purpose of this study was to provide the USDA-Forest Service, Bureau of Land Management (BLM), and other agencies or industries that may deal with temporary and intermittent use roads with the necessary background information for the identification, economic evaluation, and selection of the alternate surfacing systems and to determine...
    Resource Type:
    Dissertation
    Full Text:
    Surfacing Systems for Temporary and Intermittent Use Roads. Abstract approved: Robert D. Lay The purpose

  • Dynamic response of an offshore structure to measured and simulated stochastic wave forces

    Creator:
    Grecco, Michael G.
    Abstract:
    The dynamic response of an offshore structure to measured and simulated stochastic wave forces is investigated. The theoretical nondeterministic analysis is performed in the frequency domain for a two-dimensional model. The ocean wave system is assumed to be a zero mean, stationary, ergodic Gaussian process described by a one-dimensional wave...
    Resource Type:
    Masters Thesis
    Full Text:
    ' and dimensionless fetch Q' results in where S' (w) = F"(w-,Q-) n n P P g 3 S' (w) = S (o') rl P P

  • FATE group decision support system in transportation decision making

    Creator:
    Taekratok, Thaweesak
    Abstract:
    Two interesting challenges have been created in the traditional transportation planning process through recent adoption of more interactive roles by Federal, State and local transportation agencies and of those representing the communities being impacted by proposed transportation projects. First, the decision-making groups that formerly included solely transportation and related professionals...
    Resource Type:
    Dissertation

  • An evaluation of variables affecting the virus removal capabilities of the coagulation-filtration process

    Creator:
    Chapman, Robert Lyle
    Abstract:
    The capabilities of the coagulation-filtration process for virus removal were evaluated by constructing and operating a one step, 2 gpm coagulation-filtration pilot plant. Multi-media filters were used without pre-coagulation and sedimentation. A T2 bacteriophage was used as the indicator organism. The plant was operated under a variety of conditions in...
    Resource Type:
    Masters Thesis
    Full Text:
    Capabilities of the Coagulation-Filtration Process AN ABSTRACT OF THE THESIS OF Robert Lyle Chapman for the

  • Evaluation of finite element techniques for soil reinforcement applications

    Creator:
    Berg, Ryan Robert
    Abstract:
    A literature review and a computer study are conducted to identify the requirements of finite element programs for the specific use of discrete analyses of reinforced soil structures. The utility of six commercially available programs are appraised with respect to the identified requirements. The results of the study are directed...
    Resource Type:
    Masters Thesis
    Full Text:
    reinforcement applications AN ABSTRACT OF THE THESIS OF Ryan Robert Berg for the degree of Master of Science

  • An eigenvalue wave analysis of a fixed semi-immersed rectangular structure

    Creator:
    Steimer, Robert Bruce
    Abstract:
    The problem of a fixed rectangular structure of unit width in a train of simple harmonic normally-incident waves is modeled. The solution allows for variable (1) length and draft of structure, (2) differing depths in the three (fore, aft, and beneath the structure) distinct regions, and (3) wave period. The...
    Resource Type:
    Masters Thesis
    Full Text:
    rectangular structure AN ABSTRACT OF THE THESIS OF Robert Bruce Steimer for the degree Master of Ocean

  • Finite amplitude deep water waves : a comparison of theoretical and experimental kinematics and dynamics

    Creator:
    Jensen, Robert E.
    Abstract:
    Problems associated with quantification of deep water wave kinematics and dynamics are examined. Summaries of Stokes' theory and Dean's stream function theory are reported. A computer algorithm is developed to solve the hydrodynamic characteristics for Stokes' fifth and third order and linear theories. Tests are initiated to verify the results...
    Resource Type:
    Masters Thesis
    Full Text:
    theoretical and experimental kinematics and dynamics AN ABSTRACT OF THE THESIS OF Robert Edward Jensen for

  • Curriculum synthesis and amelioration : a case study of undergraduate civil engineering

    Creator:
    Hamernik, Robert E.
    Abstract:
    The dynamic philosophy of education as applied to the undergraduate Civil Engineering program has been influenced by such factors as the introduction of new theories, the demands and needs of our society and the personnel responsible for teaching. These changes are reflected in the curriculum as witnessed by a historical...
    Resource Type:
    Dissertation
    Full Text:
    undergraduate civil engineering AN ABSTRACT OF THE THESIS OF Name: ROBERT E. HANERNIK for the DOCTOR OF

  • Evaluation of porous pavements used in Oregon

    Creator:
    Younger, Krey
    Resource Type:
    Masters Thesis
    Full Text:
    thank the rest of the members of my graduate committee, Professor Robert Layton and Dr. Rita Leahy for

  • 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

  • Finite element analysis of wave interference effects between large structures

    Creator:
    Huang, Min-chih
    Abstract:
    A numerical calculation procedure for the hydrodynamic interference effects between large multiple structures interacting with linear ocean waves is presented in this study. Viscous effects are neglected and the hydrodynamic pressure forces are assumed to be inertially dominated. A finite element method which incorporates radiation boundary dampers is adopted to...
    Resource Type:
    Dissertation
    Full Text:
    research. Acknowledgements must be made to other members of the thesis committe; including Dr. Robert T

  • Modeling sediment transport, channel morphology and gravel mining in river bends

    Creator:
    Nam, Ilgi
    Abstract:
    A technique is developed and tested to analyze the interaction of flowing water, bed topography, and bedload sediment transport in meandering channels where gravel bars are removed. The method relates the local velocity distribution, bed shear stress and sediment transport conditions to the local bed configuration in river bends before...
    Resource Type:
    Dissertation
    Full Text:
    the members of my graduate committee, Professors David A. Bella, Jonathan D. Istok, Robert E. Wilson

  • 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:
    . Robert E. Wilson and Dr. Edward H. Piepmeier for their participation as Graduate Committee. Financial

  • Determination of structural layer properties of aggregate and asphalt surfaced roads

    Creator:
    Rwebangira, T.
    Abstract:
    This study involved the determination of the structural layer properties of aggregate and asphalt surfaced pavements for use in the evaluation of pavement load carrying capacity and the seasonal effects of moisture. This was achieved by the use of Nondestructive Testing Methods (NDT) and backcalculation techniques. Pavement surface deflection measurements...
    Resource Type:
    Dissertation
    Full Text:
    members of my graduate committee, Professors Chris Bell, Robert Layton, David Thomas and Phil Humphrey

  • Development of a mechanistic overlay design procedure for flexible pavements

    Creator:
    Zhou, Haiping
    Abstract:
    This dissertation describes the development of a mechanistic overlay design procedure. The mechanistic analysis represents a new trend in both new pavement and overlay design. The greatest advantage of the mechanistic pavement analysis is that it considers the fundamental characteristics of materials to be used, is capable of considering changes...
    Resource Type:
    Dissertation
    Full Text:
    . My appreciation is also expressed to the members of my graduate committee, Professors Robert Layton

  • Performance-based seismic design of light-frame shearwalls

    Creator:
    Kim, Jun Hee
    Abstract:
    Performance-based design has gained interest in recent years among structural designers and researchers. Performance-based design includes selection of appropriate building sites, structural systems and configurations, as well as analytical procedures used in the design process, to confirm that the structure has adequate strength, stiffness and energy dissipation capacity to respond...
    Resource Type:
    Dissertation
    Full Text:
    thank my graduate committee members: Dr. Solomon Yim, Dr. Robert Leichti, Dr. Thomas Miller, and Dr

  • Incipient motion and particle transport in gravel-bed streams

    Creator:
    Matin, Habib
    Abstract:
    The incipient motion of sediment particles in gravel-bed rivers is a very important process. It represents the difference between bed stability and bed mobility. A field study was conducted in Oak Creek, Oregon to investigate incipient motion of individual particles in gravel-bed streams. Investigation was also made of the incipient...
    Resource Type:
    Dissertation
    Full Text:
    extended to Dr. David Bella, Dr. Johnatan Istok, Dr. Robert Beschta, and Dr. Benno Warkentin for

  • Smooth and roughened horizontal cylinders in periodic waves and current

    Creator:
    Teng, Chung-chu
    Resource Type:
    Dissertation
    Full Text:
    due to the members of the Graduate Committee: Dr. Robert T. Hudspeth; Dr. William G. McDougal; Dr

  • Nonlinear oscillations, bifurcations and chaos in ocean mooring systems

    Creator:
    Gottlieb, Oded
    Abstract:
    Complex nonlinear and chaotic responses have been recently observed in various compliant ocean systems. These systems are characterized by a nonlinear mooring restoring force and a coupled fluid-structure interaction exciting force. A general class of ocean mooring system models is formulated by incorporating a variable mooring configuration and the exact...
    Resource Type:
    Dissertation
    Full Text:
    committee: Dr. Ron B. Guenther, Dr. Robert T. Hudspeth, Dr. John W. Leonard and Dr. George W. Brown, for

  • Deterministic and stochastic behaviors of a piecewise-linear system

    Creator:
    Mha, Ho-Seong
    Abstract:
    The (nonlinear) response behavior of a piecewise-linear system is investigated under both deterministic and stochastic excitations in this study. A semi-analytical procedure is developed to predict the system behavior by evaluating the joint probability density functions of the Fokker-Planck equations of the stochastic piecewise-linear system under random excitations via a...
    Resource Type:
    Dissertation
    Full Text:
    . John Peterson, Prof. Robert E Wilson, and Prof. Stephen E Binney for their interest and thoughtful

  • Stochastic analysis of a nonlinear ocean structural system

    Creator:
    Lin, Huan
    Abstract:
    Stochastic analysis procedures have been recently applied to analyze nonlinear dynamical systems. In this study, nonlinear responses, stochastic and/or chaotic, are examined and interpreted from a probabilistic perspective. A multi-point-moored ocean structural system under regular and irregular wave excitations is analytically examined via a generalized stochastic Melnikov function and Markov...
    Resource Type:
    Dissertation
    Full Text:
    . Appreciation is also given to other members of my committee: Prof. Robert M. Burton, Prof. John W. Leonard

  • The effect of dissolved oxygen concentration on the activated sludge process

    Creator:
    Swanson, Gregory R.
    Abstract:
    Since the introduction of pure oxygen activated sludge systems in the late 1960's, proponents have claimed several advantages resulting from the elevated dissolved oxygen (DO) levels maintained. However, numerous comparative studies have failed to produce a consensus of professional opinion regarding the validity of these claimed advantages. The purpose of...
    Resource Type:
    Dissertation
    Full Text:
    for C o 0.5 ranged up to about 1.0 mg/1 and for Co up to about 10 mg/1 for culture samples with

  • An evaluation of coastal Oregon's marginal aggregates

    Creator:
    Clemmons, Gregory H.
    Abstract:
    Coastal Oregon is deficient in quality construction aggregates. There is, however, an abundance of lower quality, or marginal, aggregate available for construction purposes. An evaluation of these marginal aggregates is the purpose of this paper. There are four classes of marginal rocks found on the Oregon Coast. Basalts, high in...
    Resource Type:
    Masters Thesis
    Full Text:
    ). However, Van Atta and Ludowise (4,5) suggest that such a generalization should not be made. The reason

  • Petroleum refinery residuals : a recycling feasibility study

    Creator:
    Hoffman, Andrew J.
    Abstract:
    Large quantities of unused heavy oil and residual waste products from the petroleum refining industry were deposited in on-site landfills, pits, and lagoons, prior to the promulgation of regulations governing their disposal and technology development that would further utilize and/or recycle these materials. Contacting petroleum products with sulfuric acid for...
    Resource Type:
    Masters Thesis
    Full Text:
    phenomena occurring in the PRR-lime 15 .27 C C 0 -1 111+11 f Zn01-1 I 2 Zn2 I 3 4 5 -6 -7 8 O

  • The mechanics of gas transfer in oxidation lagoons

    Creator:
    Mausshardt, Donald Bruce
    Resource Type:
    Masters Thesis
    Full Text:
    Verria Van Loan TAFLE OF CONTENTS P agø INTRODUCTIO , . , , , , , , . . . i Object cf this

  • The degradation of kraft pulping wastes in estuarine waters

    Creator:
    O'Neal, Gary Lewis, 1938-
    Abstract:
    The degradation of kraft pulping wastes in estuarine waters was measured in terms of the following parameters: five-day 20°C B.O.D., the Pearl-Benson Index, and toxicity to the bay mussel (Mytilus edulis L.). The waste tested was the total effluent from a combined pulp and paper mill producing 430 tons of...
    Resource Type:
    Dissertation
    Full Text:
    B. O. D. , the Pearl- Benson Index, and toxicity to the bay mussel (Mytilus edulis L. ). The waste

  • Design criteria for waste water lagoons in Oregon

    Creator:
    Putnicki, George John
    Abstract:
    Waste water lagoons have been used as a satisfactory means of treating domestic and certain industrial wastes in many parts of the country. Many of the parameters that govern the applicability of this type of treatment process are climatic in nature, and critical evaluation of local climatic conditions, as well...
    Resource Type:
    Masters Thesis
    Full Text:
    I I ó d 12 I I I - - 12 where D is oxygen deficit at the observed temperature or

  • A study of the coagulation of kraft effluent by sea water

    Creator:
    Andrews, Ben Neal
    Abstract:
    The coagulation of effluent from the kraft pulping and papermaking process was investigated. The amount of material coagulated from saline mixtures of the effluent is determined as a function of time, salinity, kraft effluent concentration, and mixture pH. Individual sources of salinity include sea water and several different solutions of...
    Resource Type:
    Masters Thesis
    Full Text:
    APPROVED: Dean o? Graduate School Date thesis is presented - f / ° c d . .... .,.. ..._ ... Typed by

  • Removal of dieldrin from water by granular-activated carbon

    Creator:
    Hardman, Michael Harvey
    Abstract:
    A 9.0 ppb solution of dieldrin in water was passed through a granular-activated carbon bed at the rate of 4 gpm/sq. ft. The performance of the carbon was monitored from sampling ports at bed depths of 2-1/4 and 8-1/4 inches. Isotherm tests were also run with a 9.0 ppb dieldrin...
    Resource Type:
    Masters Thesis
    Full Text:
    OF DIELDRIN FROM WATER BY GRANULAR - ACTIVATED gARBON Abstract approved A 9. O ppb solution of

  • Computer evaluation of binary vapor-liquid equilibrium data

    Creator:
    Macan, John Warren
    Resource Type:
    Masters Thesis
    Full Text:
    c the oser of such data. Consequently, O. ed1lch and A. r. Kiater (7), (6) have proposed two

  • Multiphase flow in homogeneous and bedded porous media

    Creator:
    Schroth, Martin H.
    Resource Type:
    Dissertation
    Full Text:
    Chair o partment of Civi Engineering Dean of Gra te School I understand that my dissertation will

  • Random wave velocity field from periodic theory

    Creator:
    Kobune, Koji
    Abstract:
    Random waves are often expressed as a mathematical superposition of an infinite number of sinusoidal components. The mean square spectral density of the water surface elevation is often called the wave spectrum. The zero upcrossing wave heights usually have a Rayleigh probability distribution. However, the design wave concept is still...
    Resource Type:
    Masters Thesis
    Full Text:
    hertfelt thanks to Dr. Tokuo Yamamoto, Dr. Robert T. Hudspeth and Dr. Charles K. Sollitt, Professors of

  • The characterization and physical-chemical treatability of log pond waters

    Creator:
    Blanton, Guy Ivan
    Abstract:
    The treatability of waters from four log ponds in Oregon by physical and chemical treatment methods was investigated. Treatment processes included sand filtration, activated carbon contact and coagulation with aluminum sulfate. Preliminary studies were made at each log pond to determine the homogeneity of the pond water for sampling purposes...
    Resource Type:
    Masters Thesis
    Full Text:
    (Laboratory Evaluation of... , 1966). 100 o -2 (-1c)m cC o 0 0 E COI. b0 ,, 0) 10 t u ..E. 0 -6) co

  • Dynamic response of steel structures with semirigid connections

    Creator:
    Grant, Joseph Edward
    Abstract:
    The nonlinear response of a ten-story steel structure with semirigid girder connections is studied under conditions of dynamic loading. The dynamic loading used in this study is the North-South component of the May 18, 1940 El Centro, California earthquake. To deal with the complexity of the problem the structure is...
    Resource Type:
    Dissertation
    Full Text:
    previous static tests published by J. F. Baker (1). C o n n e c t i o n M M w -=w c cn 11

  • Hydrodynamic forces on a horizontal cylinder under waves and current

    Creator:
    Teng, Chung-chu
    Abstract:
    By assuming the linear superposition principle to be valid, the hydrodynamic forces on a horizontal cylinder under waves and current are examined. In this study, towing a cylinder in waves is used to simulate a cylinder under waves and current. The experimental technique is proved valid through theoretical considerations and...
    Resource Type:
    Masters Thesis
    Full Text:
    . Acknowledgements must be made to Dr. Robert T. Hudspeth and Dr. Charles K. Sollitt for their review and advice on

  • A torsional investigation of a concrete I grider

    Creator:
    Martin, Roy Charles
    Abstract:
    This paper investigates a particular bridge construction technique which could result in a significant torsional moment. The structural member under consideration is a prestressed concrete girder for which no torsional consideration is made. Torsional shear stresses can be adequately approximated for an I-shaped girder. Laboratory model tests were performed to...
    Resource Type:
    Masters Thesis
    Full Text:
    assistance and guidance. I would also like to thank Mr. Robert Hafstad, employee of the California Bridge

  • Aerobic cometabolism of chlorinated aliphatic hydrocarbons by subsurface microbes grown on methane, propane and butane from the McCellan Air Force Base

    Creator:
    Tovanabootr, Adisorn
    Resource Type:
    Masters Thesis
    Full Text:
    by Van Hylckama Vlieg et al., 1996. The detection of unstable epoxides of chlorinated ethenes was

  • 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:
    experiments (Goltz and Roberts, 1986; Curtis et al., 1986; Robert et al., 1986). Valocchi (1985) introduced

  • Hydrology studies applicable to Oregon

    Creator:
    Johnson, Arthur Fayette
    Resource Type:
    Masters Thesis
    Full Text:
    States Weather Bureau; to Major Oscar o. Keuntz, and the engineering staff of the Portland office of

  • Consolidation characteristics of calcareous deep sea-floor sediments from the Panama Basin

    Creator:
    Kao, Yeoung Ting
    Abstract:
    Calcareous sediments containing a large percentage of foraminiferal microskeletal tests were taken from sites in the Panama Basin and subjected to an investigation to determine the consolidation characteristics of this type of soil. The consolidation-stress curves and the time rate of consolidation curves in particular were investigated in this study....
    Resource Type:
    Masters Thesis
    Full Text:
    to Dr. Ted Moore for providing the microphotographs and to Dr. T. H. van Andel, who provided the

  • Pressure distribution around a circular cylinder resting on a flat boundary in an oscillating fluid

    Creator:
    Johnson, Ronald Ernest
    Abstract:
    This study was undertaken to provide information needed in the design of ocean outfalls. A review of past investigations concerning forces on submerged objects is presented. Objects independent of any boundary and cylinders in boundary contact are considered. A solution for pressure distribution about a circular cylinder resting on a...
    Resource Type:
    Masters Thesis
    Full Text:
    of this study and to Jayne Tichenor and Phyllis Van Zyl for their assistance in data processing and

  • A determination of ultimate pile capacity in clayey silt

    Creator:
    Thompson, Duane Melvin
    Abstract:
    Predetermining the ultimate capacity of piles driven into purely cohesive soils and purely cohesionless soils involves, respectively, the consideration of soil shear strength in a completely undrained and a completely drained condition. For the intermediate cases concerning soils that possess both cohesion and internal friction (silts, clayey silts, sandy clays,...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Title: A DETERMINATION O' ULTIMATE PILE CAPACITY IN CLAYEY SILT a /ii) Abstract approved: Redacted for

  • Vertical jet diffusion in non linear density stratified fluid

    Creator:
    Baumgartner, D. J. (Donald John), 1933-
    Abstract:
    The simplified equations of motion proposed by Morton to determine the extent of vertical travel of a forced plume in a linear density stratified environment were re-written and solved in a way which allowed them to be applied to any non linear profile of density. For application to any specific...
    Resource Type:
    Dissertation
    Full Text:
    is presented May 11, 1967 ----------~--~--~~----------------- Typed by C 1 o ve r R e dfe r n f o r

  • Modeling estuary pollution by computer simulation

    Creator:
    Grenney, William J.
    Abstract:
    A digital computer model was developed to simulate the time and space distribution of a dissolved pollutant in an estuary. The program is basically a one-dimensional finite-difference model, but two dimensions can be represented by attaching together several one-dimensional channels. The influence of convection, dispersion and decay are included in...
    Resource Type:
    Masters Thesis
    Full Text:
    weighting factor for obtaining the average value. Soiv- ing Equation 4 for C(N T+T) gives: 11-KT(1-O)1 (5

  • Breaking wave problems and probabilities

    Creator:
    Yeh, Rong-chuen
    Resource Type:
    Dissertation
    Full Text:
    guidance, support and invaluable help with this research. Deep appreciation is extended to Dr. Robert T

  • Development of structural layer coefficients for open graded asphalt emulsion mixes

    Creator:
    Hatch, David Russell
    Abstract:
    This paper describes the development of structural layer coefficients for open graded asphalt emulsion surfacing layers which can be used with the AASHO pavement design method, as modified by the U. S. Forest Service, Region 6. A field survey conducted to document the history, performance and material characteristics of in-service...
    Resource Type:
    Masters Thesis
    Full Text:
    Highway Department 13 Soil Support Correlations Developed by Van Til, et al. 44 14 Illustration of the

  • Fractal solutions to the long wave equations

    Creator:
    Ajiwibowo, Harman
    Abstract:
    The fractal dimension of measured ocean wave profiles is found to be in the range of 1.5-1.8. This non-integer dimension indicates the fractal nature of the waves. Standard formulations to analyze waves are based on a differential approach. Since fractals are non-differentiable, this formulation fails for waves with fractal characteristics....
    Resource Type:
    Dissertation
    Full Text:
    grateful to him for this and for giving so freely of his time. I should also thank Professor Robert

  • In-plane stability of truss chords with application to wood trusses

    Creator:
    Kasal, Bohumil
    Abstract:
    Stability analysis of truss chords loaded by a combination of axial and lateral forces is studied. A simple model based on beam-column theory is proposed and analyzed. The continuous truss chord is replaced by a beam column loaded by end moments replacing the effect of adjacent members. The solution yields...
    Resource Type:
    Masters Thesis
    Full Text:
    June 1994 APPROVED: Assistant Professor f Civil Engineering in charge of major Chair o Department

  • Evaluation of estuarine channel conditions in Coos Bay, Oregon using side-scan sonar

    Creator:
    Hartman, Gregory L.
    Abstract:
    Side-scan sonar records in Oregon's Coos Bay estuary navigation channels were obtained at intervals of two to three months during the November 1974 - October 1975 time period from Coos Bay Channel Mile 11+50 to 15+20, and from a reach in the Marshfield Channel. A limited side-scan survey effort was...
    Resource Type:
    Masters Thesis
    Full Text:
    Privacy .kOf4.--s-o. of Civil Engineering in charge of major Redacted for Privacy Head Department of

  • Storm runoff response from roadbuilding and logging on small watersheds in the Oregon Coast Range

    Creator:
    Hsieh, Frederic Shu-kong
    Abstract:
    The effects of roadbuilding, logging and burning upon stream runoff responses to individual storms are evaluated for the Alsea experimental watersheds, located in the Oregon Coast Range, The parameters analyzed are peak discharge, induced peak discharge, time-to-peak, and storm-runoff volume. The volume parameter is further sub-divided into total, quick, delayed,...
    Resource Type:
    Masters Thesis
    Full Text:
    Professors Robert Filmer, Department of Civil Engineering and Charles Land, Statistics Department, and to Mr

  • Bench-scale study for the bioremediation of chlorinated ethylenes at Point Mugu Naval Air Weapons Station, Point Mugu California, IRP Site 24

    Creator:
    Keeling, Matthew Thomas
    Abstract:
    Laboratory scale microcosm studies were conducted using site specific groundwater and aquifer solids to assess the feasibility of stimulating indigenous microorganisms in-situ to biologically transform Trichloroethylene (TCE) and its lesser chlorinated daughter products dichloroethylene (DCE) and vinyl chloride (VC). Three different treatments were conducted to determine the best approach for...
    Resource Type:
    Masters Thesis
    Full Text:
    (reduced transition metal ion complex) CI /CI C -=C NCl/ CI- -Mn-Enz "'--o- CI- M" +1 -Enz Cr, Mn

  • Evaluation of emulsified asphalt for use in Saudi Arabia

    Creator:
    Al-abdulwahhab, Hamad I.
    Abstract:
    Saudi Arabia currently contains 31000 km (18600 mi) of paved roads and 42000 km (25200 mi) of agricultural roads, with the prospect of more roads to be constructed. The low population (6 million) compared to the large area of the country (2,253,300 km², 900,000 mi²) coupled with the high cost...
    Resource Type:
    Dissertation
    Full Text:
    Literature Review (Chapter 2 and Appendix A) Manufacture o Emulsion (Chapter 3) Mix Design (Chapter 4

  • Evaluation of polymer modified asphalt in hot mix pavements

    Creator:
    Ifft, Charles
    Abstract:
    Polymer modified asphalts have recently been the focus of much attention in the U.S. due to claims that polymer additives will lengthen the life of an asphalt pavement. Much of the published research on this topic has been concentrated on the effects of polymer modifiers on binder and mixture properties....
    Resource Type:
    Masters Thesis
    Full Text:
    AC-5 Modified with 3X Styreif 103 O 102 (5 U 5 101 -40 -30-20-10 0 10 20 30 40 30 60 70 00 90

  • 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

  • Numerical and physical modeling of wave forces on A-Jacks units

    Creator:
    Wise, Larry
    Abstract:
    A numerical model is developed to estimate wave forces on A-Jacks armor units. The forces include drag, inertia, buoyancy, and slamming as the unit penetrates the free surface. The wave force model is used to determine the rigid body motions of the units. Bulk forces on a matrix of units...
    Resource Type:
    Masters Thesis
    Full Text:
    made to improve upon Hudson's equation. The reformulation perhaps gaining the most support being Van

  • The wastewater treatment characteristics of a rotating flighted cylinder

    Creator:
    Hansen, Larry Bruce
    Abstract:
    The rotating flighted cylinder (RFC) was investigated as a potential wastewater treatment deVice. A RFC is a rigid tube with a helically-wound fin attached to the interior surface and operates by flowing wastewater through the tube as it rotates. An 8-inch and 24-inch diameter RFC was tested for solids-liquid separation,...
    Resource Type:
    Masters Thesis
    Full Text:
    Angle to horizontal Fin thickness Volume of water Rotational speed Surface area* 13.3 o 1/16 in

  • The effect of mixing moisture, oxidative aging and tire pressures on the performance of asphalt mixes

    Creator:
    Kim, Ok-kee
    Abstract:
    The research undertaken consisted of the study of three topics affecting the performance of asphalt concrete mixtures, that is, mixing moisture, oxidative aging and higher tire pressures and axle loads. This thesis presents the findings of the research comprising these three topics. In the first study, the effects of mixing...
    Resource Type:
    Dissertation
    Full Text:
    conduct of these projects. The author also gratefully acknowledges to Dr. R.G. Hicks, Dr. Robert Layton

  • A mathematical model for adsorptive bubble-separation processes

    Creator:
    T'ang, Li
    Abstract:
    Adsorptive bubble-separation processes are used to remove adsorptive contaminants from wastewater. A mathematical model was developed for the adsorptive bubble separation processes in a countercurrent column. The model included an assumption that linear adsorption of the solute occurred on the gas bubbles. Predictions indicated that aqueous column height has less...
    Resource Type:
    Dissertation
    Full Text:
    per unit column volume. At steady state, dCL/dt = 0. By solving Equation 2 for Z, it becomes z o

  • Experimental analysis of a nonlinear moored structure

    Creator:
    Narayanan, Suchithra
    Resource Type:
    Dissertation
    Full Text:
    to thank Dr. Robert Hudspeth for his expertise and invaluable advice during my course of study. I

  • Load sharing and system factors for light-frame wall systems

    Creator:
    Yu, Guangren
    Abstract:
    A considerable amount of research has focused on load-sharing and system effects in repetitive-member wood floor systems subject to transverse loading. However, relatively few studies have been conducted to investigate load-sharing and system effects in repetitive-member wall systems which may be subject to combined transverse and gravity (vertical) loading, and...
    Resource Type:
    Dissertation
    Full Text:
    throughout this research. The author also extends his sincere thanks to Drs. Robert Leichti, Thomas H

  • Aerobic cometabolism of trichloroethylene and cis-dichloroethylene in propane-fed microcosms from the McClellan Air Force Base

    Creator:
    Timmins, Brian
    Abstract:
    This thesis focused on using microcosms to better understand the aerobic cometabolic processes of TCE and cis-DCE transformation that occurred during a Cometabolic Air Sparging (CAS) demonstration at McClellan Air Force Base. The microcosms were created with groundwater and aquifer materials from the demonstration site. Concentrations of compounds in the...
    Resource Type:
    Masters Thesis
    Full Text:
    there in a sea of misguided religions. Thomas Paine, Benjamin Franklin, Robert Ingersoll, Albert

  • Influence of expansive soils on structures in the Eugene area

    Creator:
    Bonell, John Alexander
    Abstract:
    Expansive soils in Eugene, Oregon present a problem to residents, consultants, contractors, and the city government. During the years 1977 to 1979, the nature and extent of the problem was identified, including an outline of the local occurrence of expansive soils and possible engineering solutions to the most often encountered...
    Resource Type:
    Masters Thesis
    Full Text:
    . Jerry Diethelm, Mr. Ted Dietz, Mr. John Doran, Mr. Don Gilman, Mr. John Herrick, Mr. Robert Hill, Mr

  • Analysis of thermal fatigue distress of asphalt concrete pavements

    Creator:
    Jackson, N. Mike (Nathaniel Michael)
    Abstract:
    Thermal cracking of asphalt concrete pavements is responsible for millions of dollars in annual maintenance and rehabilitation costs in the United States and Canada. Thermal cracking is typically associated with low temperatures in northern climates and at high elevations. However, another form of thermal cracking, known as thermal fatigue cracking,...
    Resource Type:
    Dissertation
    Full Text:
    , Shanmugham, and Garrett model, the program VISCO utilizes Van der Poel's nomograph, as computerized by de

  • Evaluation of the torsion test for determining the shear strength of structural lumber

    Creator:
    Heck, Leanne Renee
    Abstract:
    The torsion test was evaluated as a method for determining the shear strength of full-size structural lumber. The evaluation involved an experimental length study, an experimental depth study, and a finite element study. The length study consisted of fifty nominal 2x4 specimens, ten specimens for each length, and ten American...
    Resource Type:
    Masters Thesis
    Full Text:
    Dr. Willie Rochefort for his participation as the graduate school representative, and Dr. Robert

  • A lagrangian philosophy for plume modeling

    Creator:
    Frick, Walter Eugen
    Resource Type:
    Dissertation
    Full Text:
    publication in a split review in which the editor made the decision to publish (van der Zee, 1994). It