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Filtering by: Creator Churchill, David J. Remove constraint Creator: Churchill, David J. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Driving simulation : a mechanism for understanding driver response to mobile barriers in work zones

    Creator:
    Swake, Joshua
    Abstract:
    Highway construction projects require temporary changes in roadway characteristics, such as the number of operational lanes, lane path, lane width, shoulder width, and posted speed limit. These modifications which are often temporary in nature have the potential to impact driving performance. Many research efforts have focused on developing standards to...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ David S. Hurwitz Highway construction projects require temporary changes in roadway

  • 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

  • Mathematical model of a phytoplankton community in a nitrate limited environment

    Creator:
    Grenney, William J.
    Abstract:
    Mathematical modeling of phytoplankton populations based on laboratory observations provides increased understanding of the interaction among the environmental and biological mechanisms. influencing growth dynamics. Such fundamental understanding is necessary to estimate the impact of man-made perturbations on natural population. A three-compartment mathematical model was developed to represent a phytoplankton population...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: 'David A. Bella Mathematical modeling of phytoplankton populations based on laboratory

  • 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:
    : MODELING ESTUARY POLLUTION BY COMPUTER SIMULATION Abstract approved: Dr. David A. Belia A digital

  • Innovative Applications of Real-World Vehicle Trajectories Collected with a Radar Vehicle Detection System

    Creator:
    Simpson, Ellen J.
    Abstract:
    Left turn movements are considered to be the highest risk movements through an intersection, and can result in head on, angle, or side impact crashes. The flashing yellow arrow (FYA) for use as a permissive left turn phasing indication is relatively recent, first appearing in the 2009 edition Manual on...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: _____________________________________________________ David S. Hurwitz Left turn

  • Evaluation of Oregon Tack Coat Performance to Reduce Tracking and Increase Interlayer Shear Strength of Asphalt Pavements

    Creator:
    Covey, David J.
    Abstract:
    CSS-1H is the most commonly used slow-setting emulsion grade in Oregon. “New” engineered emulsions were recently developed in Oregon to reduce tracking, the pick-up of tack coats by construction vehicle tires during construction activities, and increase interlayer shear strength (ISS), the amount of adhesive bond present between layers of asphalt...
    Resource Type:
    Masters Thesis
    Full Text:
    David J. Covey for the degree of Master of Science in Civil Engineering presented on August 3, 2016

  • Moisture effects on properties of wood-composite assemblies

    Creator:
    King, David
    Abstract:
    Engineered wood composites are used in many structural applications and are intended for dry use. However, these materials may encounter significant amounts of wetting while in service, which can lead to structural failures. This study combined aspects of wood science, mechanics, structural engineering, and mycology to assess changes in material...
    Resource Type:
    Masters Thesis
    Full Text:
    David King for the degree of Master of Science in Wood Science and Civil Engineering presented on March

  • The effect of hold-down misplacement on the strength and stiffness of wood shear walls

    Creator:
    Lebeda, Dana J.
    Abstract:
    The objective of this study was to determine the effect of misplaced hold-downs on the static and cyclic behavior of wood shear walls. Three shear wall configurations were considered in this study. The first configuration (control) had hold-downs at the ends of the wall (wall type 1), the second configuration...
    Resource Type:
    Masters Thesis
    Full Text:
    Dana J. Lebeda for the degree of Master of Science in Civil

  • Evaluation of Dynamic Passive Pedestrian Detection with a Framework for Future Applications

    Creator:
    Larson, Travis O.
    Abstract:
    Intersections pose unique transportation challenges regarding safety and operational efficiency. When pedestrians currently want to cross at intersection, they need to use a push button to issue a call for service. The call is static and cannot be altered or changed. But by implementing dynamic passive pedestrian detection sensors, intersections...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: _____________________________________________________________ David Hurwitz

  • Measurement of the rates of reductive dechlorination of chlorinated phenols

    Creator:
    Nicholson, David K.
    Abstract:
    Knowledge of a compound's degradation pathway is crucial to the assessment of risk at contaminated sites. Pentachlorophenol and its metabolic products can serve as model compounds to study the fate and transport of halogenated aromatic compounds in the environment. Acclimation of anaerobic sewage sludge to pentachlorophenol produced a microbial consortium...
    Resource Type:
    Masters Thesis
    Full Text:
    chlorinated phenols AN ABSTRACT OF THE THESIS OF David K. Nicholson for the degree of Master of Science in