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Filtering by: Creator Edwards, Daniel K. Remove constraint Creator: Edwards, Daniel K. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Tsunami propagation in large rivers : idealized cases and the Columbia River Estuary

    Creator:
    Kalmbacher, Kirk D.
    Abstract:
    The hazards associated with tsunamis are well known and have been studied for decades. The majority of research is, however, focused on open coastlines which bear the brunt of a tsunamis force. Other regions that can be strongly impacted by a tsunami are large estuaries. Here, the tsunami encounters a...
    Resource Type:
    Masters Thesis
    Full Text:
    thank the members of my committee, Dr. Dan Cox, Dr. Edward Dever, and Dr. Peter Ruggiero who have

  • Cross-section fatal crash type prediction models

    Creator:
    Zhu, Hong
    Abstract:
    The rural two-lane highway in the southeastern United States is frequently associated with a disproportionate number of serious and fatal crashes. The major research objectives are to investigate the relations between probabilities of fatal crash type occurrence and potential contributing factors from road geometric design characteristics and roadside, environmental features....
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: ________________________________________________________ Karen K. Dixon

  • Hybrid Survey Networks : Combining Real-time and Static GNSS Observations for Optimizing Height Modernization

    Creator:
    Weaver, Brian Jerald
    Abstract:
    To derive ellipsoid heights on passive marks with cm-level accuracy, many current specifications require the collection and adjustment of long-duration, static Global Navigation Satellite System (GNSS) sessions. To increase efficiency, a survey procedure that includes real-time kinematic vectors from a real-time GNSS network (RTN) was evaluated. Thirty different “hybrid” networks...
    Resource Type:
    Masters Thesis
    Full Text:
    : __________________________________________________________________ Daniel T. Gillins To derive ellipsoid heights on passive marks with cm-level accuracy, many

  • A calculation of the suction requirements to prevent boundary layer separation on a circular cyclinder

    Creator:
    Corsiglia, Victor R.
    Abstract:
    An investigation was made to test the method of Head on the flow about a circular cylinder with suction. The method of Head is an approximate method of obtaining solutions to the boundary layer equations. The method was adapted to the digital computer to facilitate performing the calculations, and a...
    Resource Type:
    Masters Thesis

  • On the Imaging of Rip Currents in X-band Radar

    Creator:
    Kloster, Rebecca
    Abstract:
    Rip currents pose a serious danger to visitors of bathing beaches; they are also an important process in surf zone circulation. Haller et al. [2014] demonstrated that shore-based X-band radar can be used to compliment in situ measurements of rip currents. However, little is known of the underlying radar imaging...
    Resource Type:
    Masters Thesis
    Full Text:
    , it can be written as ≥≥No ≥≥NoN ( , , k, <) = T No {au [cos≥(<) a ≥k − sin(<) cos(<) a Æ +ax a

  • Bridge Damage State Detection Based on Strain-Based Wireless Structural Health Monitoring

    Creator:
    Slaven, Kelli R.
    Abstract:
    The Pacific Northwest is at risk for significant seismic and tsunami events, which are capable of severely damaging lifeline transportation infrastructure, particularly bridges. As the bridges in the United States age and begin to show signs of fatigue, the risk for severe damage increases. Proper monitoring and inspection of bridges...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Daniel J. Borello The Pacific Northwest is at risk for significant seismic and tsunami

  • Height Modernization from Static GPS Networks in Oregon: Evaluating NGS Guidelines and OPUS-Projects

    Creator:
    Kerr, Darren J.
    Abstract:
    Determining accurate elevations is important for many engineering and scientific applications, and finding these heights via GNSS increases efficiency and significantly reduces the costs as compared to precise geodetic leveling. The National Geodetic Survey (NGS) has published guidelines for determining both ellipsoidal and orthometric heights with GPS to within 2...
    Resource Type:
    Masters Thesis
    Full Text:
    : Evaluating NGS Guidelines and OPUS-Projects Abstract approved: Daniel T. Gillins Determining accurate

  • Laboratory observations and numerical modeling of inner surf and swash zone hydrodynamics on a steep slope

    Creator:
    Shin, Sungwon
    Abstract:
    Laboratory data of free surface elevations and fluid velocities were obtained using a laser-Doppler velocimeter for the case of a periodic wave plunging over an impermeable, steep (1:10) slope with a fixed bottom roughness. The measurements were conducted over 15 cross-shore locations from the outer surf zone to the swash...
    Resource Type:
    Dissertation
    Full Text:
    approved: Daniel T. Cox Laboratory data of free surface elevations and fluid velocities were obtained

  • 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:
    SPECTRA FROM CURRENT AND PRESSURE MEASUREMENTS Redacted for Privacy ABSTRACT APPROVED: Dr. Charles K

  • Effectiveness of curve advisory speed signs : a characterization of road operations in western Oregon

    Creator:
    Avelar Morán, Raúl Eduardo
    Abstract:
    Posting advisory speed signs at sharp horizontal curve locations is a common practice in the U.S. These signs recommend drivers safe speeds to negotiate such curves. Literature indicates that adherence to advisory speeds is, in general, poor. Moreover, limited research is available that quantifies safety implications of these signs. This...
    Resource Type:
    Masters Thesis
    Full Text:
    Operations in Western Oregon. Abstract approved: ___________________________ Karen K. Dixon