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

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  • Optimization of feeding schedules for coho salmon in the hatchery environment

    Creator:
    Corey, Philip David
    Abstract:
    A growth model is developed for coho salmon which accounts for temperatures and feeding rates typically encountered in fish hatchery operation. Feeding rates utilized by the model ranged from maintenance to maximum utilizable rations. The model is derived from an empirical equation for maximum growth rate, and a theoretical equation...
    Resource Type:
    Dissertation
    Full Text:
    Salmon in the Hatchery Environment Redacted for privacy Abstract approved: David A. Bella A growth

  • Nitrate and pesticide transport under pear production in clay and sandy soil

    Creator:
    Cao, Weidong
    Abstract:
    Groundwater contamination on irrigated land is of concern in this nation and around the world. In order to reduce the potential of groundwater contamination by agricultural practices such as irrigation, fertilizer and pesticide application, vadose-zone monitoring and sampling are needed. The main objective of this study was to evaluate impacts...
    Resource Type:
    Masters Thesis
    Full Text:
    my other committee members Dr. Marshall English and Dr. Clayton Paulson for their valuable advice

  • Local scour at isolated obstacles on river beds

    Creator:
    Huang, Cheng-Chang
    Abstract:
    Maximum equilibrium scour depths, equilibrium scour volumes, and induced equilibrium movements at isolated obstacles on river beds were investigated in clear-water scour. The research was achieved by a systematic flume study based on the results of dimensional analysis of local scour. The main tested obstacles for local scour were cubes....
    Resource Type:
    Dissertation
    Full Text:
    appreciation is also expressed to the members of my graduate committee, Professor David A. Bella, Charles K

  • Mass transport in laboratory water wave flumes

    Creator:
    Kim, Tae In
    Abstract:
    A complete solution, exact to second-order, for wave motion forced by a hinged-wavemaker of variable-draft is presented. A solution for a piston type wavemaker is also obtained as a special case of a hinged-wavemaker with negative infinite draft. The existing Stokes inviscid theories for mass transport is extended to include...
    Resource Type:
    Dissertation
    Full Text:
    : Dr. Charles K. Sollitt; Dr. John W. Leonard; Dr. Larry S. Slotta; and Dr. Marshall J. English, for

  • Impact of Bicycle Rolling Stop Laws on Safety-Relevant Behaviors in the Pacific Northwest

    Creator:
    Woodside, Jasmin Barnes
    Abstract:
    Previous research has found some bicyclists disregard circular red indications and stop signs. Possible justifications include a desire to increase safety, save energy, save time, and increase visibility. Because of this, many bicyclists feel as though stopping at stop signs, especially in the absence of conflicting vehicular traffic, is an...
    Resource Type:
    Masters Thesis
    Full Text:
    Pacific Northwest Abstract approved: ____________________________________________ David S

  • Evaluation of Cycling Behavior: Factors that Influence Bicyclists’ Comprehension, Comfort, and Stress

    Creator:
    Cobb, Douglas P.
    Abstract:
    Travel demand has increased due to population growth, increase of vehicle ownership, and development patterns resulting in greater levels of congestion, pollution, and crash frequency. One approach to demand management is to increase the share of trips made by bicycles. With the increase in bicycling rates, there is a critical...
    Resource Type:
    Dissertation
    Full Text:
    David Hurwitz Travel demand has increased due to population growth, increase of vehicle ownership

  • Transportation Infrastructure to Support Bicycling in Dense Urban Environments : Design and Operational Considerations for Bicycle Lanes in Proximity to Commercial Vehicle Loading Zones

    Creator:
    Ghodrat Abadi, Masoud
    Abstract:
    While sophisticated plans have been adopted nationally and globally to increase bicycling’s share of daily commutes, safety concerns have negatively impacted targeted bicycling growth. Specifically, truck traffic plays a pivotal role in bicyclists’ perceptions of safety and comfort, because of the severe consequences of bicycle-truck collisions. Several types of engineering...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ David S. Hurwitz While sophisticated plans have been adopted nationally and globally to

  • Evaluating Driver Response to the Onset of Circular Yellow Indication in the Presence of a Following Vehicle at Isolated High-Speed Signalized Intersections

    Creator:
    Mohammed, Hameed A.
    Abstract:
    Dilemma zones on the approach to high-speed signalized intersections have been identified as a safety problem that can contribute to rear–end and right–angle crashes. However, in situations when a pair of vehicles is caught in the dilemma zone, it is not well understood how the following vehicle’s headway and classification...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ David S. Hurwitz Dilemma zones on the approach to high-speed signalized intersections have

  • Groundwater flow model for the lower Malheur Basin near Ontario, Oregon

    Creator:
    Walker, David S.
    Abstract:
    The shallow, poorly-confined, sand and gravel aquifer underlying the lower Malheur River basin is contaminated by nitrate and metabolites of the herbicide dimethyl tetrachloroterephthalate (DCPA), first detected in 1983 and 1985, respectively. The aquifer supplies water for the Ontario municipal water system, domestic and industrial uses, and irrigation. In response...
    Resource Type:
    Masters Thesis
    Full Text:
    Ontario, Oregon AN ABSTRACT OF THE THESIS OF David S. Walker for the degree of Master of Science in

  • 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:
    graded asphalt emulsion mixes AN ABSTRACT OF THE THESIS OF David Russell Hatch for the degree of