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  • Extreme Wave Runup and Runup Variability on Beaches

    Creator:
    Li, Chuan
    Abstract:
    Wave runup is an important physical process that affects nearshore sediment transport, coastal erosion, and flooding. Large and unexpected runup events can also be dangerous to beach goers. Extreme runup statistics are essential parameters used in engineering design of marine structures and in coastal management. Although the study of runup...
    Resource Type:
    Dissertation
    Full Text:
    Research Laboratory staff, Harry Yeh, Jonathan D. Nash, and two anonymous reviewers. This thesis is

  • Effects of Wave Nonlinearity and Vertical Variation of Vegetation Density on Wave Attenuation

    Creator:
    Wu, Wei-Cheng
    Abstract:
    The understanding and prediction how coastal wetland vegetation attenuates wave action has received renewed attention with global climate change impacts and increasing populations on coastlines. Conventional attenuation models utilize empirical drag coefficients, but these coefficients exhibit a wide range of values, and there is some uncertainty in the relative importance...
    Resource Type:
    Dissertation
    Full Text:
    the working of NHWAVE modeling. I am grateful with my committee members, Dr. Harry Yeh, Dr. Tuba

  • The contribution of morphologic slope on wave, current, and combined wave-current driven sediment flux and ripple geometry on an idealized sand mound

    Creator:
    Lee, Seok-Bong
    Abstract:
    Sediment convergence and divergence zones create subaqueous morphological features that range from ripples O (cm) to coastlines O (km). However, there is a gap in knowledge associated with quantifying the contribution of small-scale ripple mobility to the evolution of large-scale morphology. To address this gap, we investigate how small-scale ripples...
    Resource Type:
    Dissertation
    Full Text:
    . Harry Yeh, Dr. Greg Wilson, and Dr. Edward Dever. They provided excellent graduate classes and offered

  • Radar and Optical Remote Sensing of Submesoscale Frontal Features

    Creator:
    Simpson, Alexandra J.
    Abstract:
    The coastal region is home to many types of surface fronts that exist on a submesoscale (1-10 $km$). While in situ observations capture point or transect observations of frontal behavior subsurface, their complex spatial patterns can be well-captured using remote sensing techniques, which provide synoptic views of the ocean surface...
    Resource Type:
    Dissertation
    Full Text:
    phenomenal graduate program. Thank you to my committee, Jim Lerczak, Meagan Wengrove, Harry Yeh, and

  • A Linear Mixed Model Framework for Spatio-Temporal Random Processes using the Separable and Product-Sum Covariance Structures

    Creator:
    Dumelle, Michael J.
    Abstract:
    We describe spatio-temporal random processes using linear mixed models and discuss estimation, inference, and prediction under this formulation. We show how many commonly used covariances are special cases of this more general framework and pay special attention to the separable and product-sum covariances. The linear mixed model formulation facilitates straightforward...
    Resource Type:
    Dissertation
    Full Text:
    Kowalewski and Harry Yeh, for the insightful feedback, encouragement, and positivity. I want to thank the

  • Tsunami Loading on Coastal Infrastructure

    Creator:
    Xie, Zhongliang
    Abstract:
    The safety of coastal infrastructure has been a concern after the Indian Ocean Tsunami in 2004 and the Great East Japan Tsunami in 2011. The western coast of the United States is also exposed to tsunami hazards due to the Cascadia subduction zone. Therefore, it is critical to design coastal...
    Resource Type:
    Dissertation
    Full Text:
    . Andre Barbosa, Dr. Harry Yeh and Dr. Solomon Yim for the help they have provided. I would also thank Dr

  • Numerical Investigations on Sewer Geysers

    Creator:
    Choi, YunJi
    Abstract:
    A sewer geyser is a series of ejecting air-water mixture eruptions through vertical shafts of drainage systems. In field observed geyser incidents, manhole covers were blown into the air and they were followed by ejecting air-water mixture eruptions that lasted for several seconds at a time. Trapped air in sewer...
    Resource Type:
    Dissertation
    Full Text:
    . John Sessions, Dr. Harry Yeh, and Dr. Solomon Yim. Thank you for your comments and time. The School of

  • 3D Voronoi Subdivision for Simulating Destructible and Granular Materials

    Creator:
    Clothier, Matthew M.
    Abstract:
    In many traditional computer graphics applications, rendered scenes typically utilize 3D meshes to represent objects within an environment. As the demand to further improve the realism of graphics applications increases, such as for movies and games, it is becoming more important to represent the inner volumes of object meshes. In...
    Resource Type:
    Dissertation
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    (GIS) world, Voronoi diagrams are called Thiessen polygons after American meteorologist Alfred H

  • Improving automated email tagging with implicit feedback

    Creator:
    Sorower, Mohammad Shahed
    Abstract:
    Machine learning systems are generally trained offline using ground truth data that has been labeled by experts. However, these batch training methods are not a good fit for many applications, especially in the cases where complete ground truth data is not available for offline training. In addition, batch methods do...
    Resource Type:
    Dissertation
    Full Text:
    committee members: Prof. Prasad Tadepalli, Prof. Alan Fern, Prof. Xiaoli Fern and Prof. Harry Yeh, for

  • Hydrodynamic contact/impact modeling and application to ocean engineering problems

    Creator:
    Challa, Ravi
    Abstract:
    Fluid-structure interaction (FSI) is a very interesting and challenging multi-disciplinary field involving interaction of a movable or deformable structure with an internal or surrounding fluid flow. FSI has several practical engineering applications such as the determination of the hydrodynamic forces on a structure or the dynamics of motion of bodies...
    Resource Type:
    Dissertation
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    . Harry Yeh, Prof. Michael Scott and Prof. William McDougal for their inputs, advice and suggestions