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Filtering by: Creator Özkan-Haller, H. Tuba Remove constraint Creator: Özkan-Haller, H. Tuba Committee Member Haller, Merrick Remove constraint Committee Member: Haller, Merrick Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

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  • Data Assimilation using Synthetic-Aperture Radar Imagery for Bathymetry Inversion at the Mouth of the Columbia River

    Creator:
    Harper, Spencer H.
    Abstract:
    Synthetic-aperture radar (SAR) imagery can provide wavenumber and frequency data to generate bathymetry estimates for locations where limited access or extreme ocean conditions can make standard bathymetry survey techniques difficult or impossible. The availability of SAR data could allow for regular bathymetry estimates of navigational channels providing insight into dredging...
    Resource Type:
    Masters Thesis
    Full Text:
    River. Abstract approved:_____________________________________________________ H. Tuba Özkan

  • Power Output Calculations for an Array of Point-absorber Wave Energy Converters

    Creator:
    García-Castaño, Manuel
    Abstract:
    This study presents a methodology for power take off (PTO) forecasting for an array of heave wave energy converters (WECs). Based on spectral data obtained directly from the National Data Buoy Center, representative realistic sea states are generated at the location of the WECs, and by using two wave-structure interaction...
    Resource Type:
    Masters Thesis
    Full Text:
    : ____________________________________________________________________ H. Tuba Özkan-Haller This study presents a methodology for power take off (PTO) forecasting

  • Weather and large waves along the Oregon coast: atmospheric controls on a numerical wave model

    Creator:
    Ellenson, Ashley N.
    Abstract:
    In this study, the effects of implementing different wind input or physics packages in a numerical wave model to recreate large wave conditions are explored. Three large wave events are simulated with WaveWatch III. The wind inputs which are compared are NCEP's Global Forecasting System (GFS) with 0.5 degree resolution...
    Resource Type:
    Masters Thesis
    Full Text:
    acknowledge my committee members, H. Tuba Özkan-Haller, Jim Thomson, and Merrick Haller for their guidance

  • Remote sensing of radiation stress gradients from optical imagery

    Creator:
    Killian, Jason R.
    Abstract:
    Wave-induced circulation is the defining characteristic of the nearshore. Within this region, the constant feedback cycle between incoming waves, wave-generated currents, and the mobile sediment bed is responsible for the evolution of complex patterns in nearshore and beach morphology. Central to our understanding of this system is knowledge of the...
    Resource Type:
    Masters Thesis
    Full Text:
    help me finish this project, and my committee members, Mick Haller and Tuba Özkan-Haller, for their

  • Observations on the evolution of shoaling nonlinear internal waves in Massachusetts Bay using shipboard X-band radar

    Creator:
    Nelson, Brian G.
    Abstract:
    During four cruises in July and September of 2008 and 2009, the shipboard X-band radar was tuned to detect the modulated bands of surface roughness caused by converging and diverging currents associated with high-frequency nonlinear internal wave (NLIW) packets. The data collected was used to quantify the propagation direction (ϴp),...
    Resource Type:
    Masters Thesis
    Full Text:
    Beam Width (H): 1.23 dgrs Frequency: 9.410gHz ± 0.030 gHz Beam Width (V): 20 dgrs TR Unit: RTR-079

  • Evaluation of Stereoscopic Camera Systems for Non-Intrusive Spatial Free Surface Measurement in Coastal Research Laboratories

    Creator:
    O'Day, Christopher S.
    Abstract:
    Physical modelling is instrumental to the progression of coastal engineering research and our understanding of the offshore and nearshore environments. Scaled models are designed and built to be tested in coastal research laboratories, where a wave basin or flume generates the desired wave conditions for experimentation. The surrounding hydrodynamics of...
    Resource Type:
    Masters Thesis
    Full Text:
    ............................................................................................................... 87 6.1.1 Shore Normal (H = 0.5 m, T = 1.8 s, θ = 0 deg, h= 1m

  • Numerical and Analytical Modeling of Temperature Evolution in Laser Processing of Materials

    Creator:
    Ball, Stefan R.
    Abstract:
    The ultimate goal of this work is to analyze and compare two predictive models of thermal profile in laser processing of materials. An analytical method that uses closed-form equations to represent a geometric model of a laser heat source will be contrasted with a commercial computational fluid dynamics code that...
    Resource Type:
    Masters Thesis
    Full Text:
    speed of the heat source to the medium, 𝑇 is temperature, 𝜌 is density, 𝑘 is conductivity, ℎ is

  • Contact and impact dynamic modeling capabilities of LS-DYNA for fluid-structure interaction 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 plays a pivotal role in many different types of real-world situations and practical engineering applications involving large structural deformation and material or geometric...
    Resource Type:
    Masters Thesis
    Full Text:
    thankful to Prof. Harry Yeh and Prof. Merrick Haller for imparting the basic principles in ocean

  • Predicting deep water breaking wave severity

    Creator:
    Hovland, Justin
    Abstract:
    Ocean Wave Energy Converters (WECs) operating on the water surface are subject to storms and other extreme events. In particular, high and steep waves, especially breaking waves, are likely the most dangerous to WECs. A method for quantifying the breaking severity of waves is presented and applied to wave data...
    Resource Type:
    Masters Thesis
    Full Text:
    of gravity (m/s2) h Water depth (m) H Wave height (m) Hm0 Spectrally derived significant wave

  • Wave Resource Assessments: Spacio-Temporal Effect of Wave Energy Converter Scale and Blue Economy Opportunities

    Creator:
    Dunkle, Gabrielle R.
    Abstract:
    Wave energy has the potential to power large and small factions of economies around the world alike. Current methods for determining the amount of wave energy resource available to wave energy converter (WEC) devices entail capturing the look of the sea state at large by presenting characteristic wave heights, periods,...
    Resource Type:
    Masters Thesis
    Full Text:
    thank my committee members Dr. Meagan Wengrove, Dr. Merrick Haller, and Dr. Edward Dever for their