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Student Defenses
MS Plan B Defense: Using Differential Pressure sensor arrays to identify wake structures created by a heaving and pitching foil
zoom See link in announcementGary Glass Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa This defense will be held via zoom Meeting ID: 936 1860 0974 Passcode: GaryMS https://hawaii.zoom.us/j/93618600974 Inspired by the lateral line sensory system of fish, sensor arrays distributed over the surface of underwater vehicles can be used to sense the fluid surroundings. While previous studies have used such a system to compensate for fluid forces acting on a vehicle, here the goal is to use the distributed pressure sensors to detect nearby fin wake patterns, as is done by schooling fish. This study aims to design
MS Plan B Defense: Analysis of XBeach non-hydrostatic model capability in processing SWAN spectral input
POST 723 1680 East-West Road, Honolulu, HI, United StatesMalia Selman Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 918 3466 1004 Passcode: MaliaMS https://hawaii.zoom.us/j/91834661004 Numerical models have become an industry staple for identifying and predicting coastal conditions. These models are used in engineering design and hazard mitigation with implication for public and infrastructure safety. Open-sourced model packages are attractive options as they promote collaboration between academics and working professionals in the development and improvement of the source code. Developed by the Delft University of Technology, the nearshore model
MS Plan A Defense: Using Nonhydrostatic XBeach to Simulate Wave Transformations in Fringing Reef Environment
POST 723 1680 East-West Road, Honolulu, HI, United StatesJonathan Chase Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 947 3961 2246 Passcode: ORE https://hawaii.zoom.us/j/94739612246 The scope of this study is to assess the feasibility and limitations of using the Nonhydrostatic version of XBeach (NonhXB, a two-dimensional (2D), phase resolved, depth integrated numerical model) to study the effects of nearshore wave transformations in a fringing reef environment. This study focused on finding the optimal grid size to simulate the breaker zone characteristics in a fringing reef environment by comparing
PhD Defense: Enhanced Fully Nonlinear Boussinesq-type Equations in Conserved Variable Form and Linear Analytical Properties with Compact Finite Difference Schemes
POST 723 1680 East-West Road, Honolulu, HI, United StatesTroy W. Heitmann PhD Candidate Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 974 2551 3125 Passcode: ORE https://hawaii.zoom.us/j/97425513125 In coastal engineering applications, Boussinesq-type models are limited by orders of approximation originating in both the governing equations and numerical schemes employed. Dispersive model solutions reflect a composition of approximations dependent upon finite sampling intervals. This study aims to improve understanding of both theoretical and numerical facets, with the end goal of strengthening practitioner awareness in model applicability. A modern approach to parameterize
MS Plan A Defense: Fluid-Structure Interaction Analysis of an Oscillating Wave Surge Energy Converter using LS-Dyna
POST 723 1680 East-West Road, Honolulu, HI, United StatesKyle Pappas Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 936 1681 5822 Passcode: KyleMS https://hawaii.zoom.us/j/93616815822 Three-Dimensional two-way coupled fluid structure interaction (FSI) analysis requires a complex strategy utilizing the finite element method (FEM) for large matrix computations. Two FEM solvers in LS Dyna are utilized to conduct a structural analysis of the Hawai’i Wave Surge Energy Converter (HAWSEC) for a particular wave condition case study that is directly compared with experimental results. The HAWSEC is a hollow, surface piercing,
MS Plan B Defense: Feasibility of Retrofitting Tinian Breakwater in CNMI
POST 723 1680 East-West Road, Honolulu, HI, United StatesZachary Niezgodski Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 917 8926 7508 Passcode: ZachMS https://hawaii.zoom.us/j/91789267508 Since construction of the Tinian Harbor in 1945, there have only been minor repairs to the original facilities, resulting in many becoming damaged and degraded. Looking to the future, the U.S. Department of Defense, specifically the Department of the Navy, has plans to upgrade logistics capacity on Tinian for offload operations, and thus is most interested in projects that will improve the port facilities.
MS Plan B Defense: Infrastructure for a Dataset to Improve Tagging and Mapping of Low-Flying Aircraft via Acoustic and Radio Broadcast Data
Wyatt Burkley Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held remotely over Google Meet** Google Meet Link: meet.google.com/wor-pdyq-eos Since construction of the Tinian Harbor in 1945, there have only been minor repairs to the original facilities, resulting in many becoming damaged and degraded. Looking to the future, the U.S. Department of Defense, specifically the Department of the Navy, has plans to upgrade logistics capacity on Tinian for offload operations, and thus is most interested in projects that will improve the port facilities. This study focuses on a potential upgrade of
MS Plan A Defense: An in-situ autonomous sampler system for vertical benthic biogeochemical fluxes detection
POST 723 1680 East-West Road, Honolulu, HI, United StatesJomphol Lamoonkit Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 958 6184 4769 Passcode: JomMS https://hawaii.zoom.us/j/95861844769 Benthic environments in the coastal ocean, such as seagrass meadows, have gained attention for their capacity to store organic carbon in their tissues. Nevertheless, there is still room to study their influence on vertical biogeochemical fluxes between pore water beneath the sediment layer and the overlying seawater. The ability to monitor the vertical biogeochemical fluxes of seawater in the vegetated sedimentary environment could improve
MS Plan B Defense: Viscous Damping Determination For Dynamic Modelling Improvement Of A Floating Oscillating Surge Wave Energy Converter (FOSWEC)
Holmes 287 2540 Dole Street, Honolulu, HI, United StatesJesse Gray Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (Holmes 287) and over Zoom** Meeting ID: 941 6465 8935 Passcode: JesseMS https://hawaii.zoom.us/j/94164658935 Wave energy converters (WEC) have not yet converged on an optimal archetype due to varying and unsteady design challenges of the ocean environment. Computational Fluid Dynamics (CFD) can provide necessary characterization of hydrodynamic parameters for WEC devices, but different CFD methods can vary in accuracy and required computational capacity. OrcaFlex, a dynamic analysis software for offshore marine systems, utilizes the Boundary Element Method (BEM)
MS Plan B Defense: Feasibility of Fiber-Reinforced Polymer Piles for Marine Fender Systems at Coast Guard Base Kodiak, Alaska
POST 723 1680 East-West Road, Honolulu, HI, United StatesBethany Stafford Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 940 4010 1446 Passcode: BethMS https://hawaii.zoom.us/j/94040101446 Coast Guard Civil Engineering Unit Juneau contracts a project approximately biennially to replace damaged fender piles at Base Kodiak’s waterfront. Traditionally, this has been a replace-in-kind project that replaces damaged fender piles with the same type of marine-grade Douglas fir as originally installed. This project evaluates the feasibility of using Fiber Reinforced Polymer (FRP) piles, which have a higher material cost, but more favorable
MS Plan B Defense: Performance Assessment of Wave Models for Cold Front Events in Hawai’i
POST 723 1680 East-West Road, Honolulu, HI, United StatesLiz (Elizabeth) Hauschild Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held both in person (POST 723) and over Zoom** Meeting ID: 969 2180 7582 Passcode: LizMS https://hawaii.zoom.us/j/96921807582 The University of Hawai’i actively supports the United States’ first Wave Energy Test Site (WETS), situated on the east side of Oahu. The site’s location is exposed to a diverse array of wave energy resulting from persistent trade winds, seasonal extratropical storms, and subtropical and tropical systems. If not well understood, the activity and complexity of the wave climate may pose challenges for
MS Plan B Defense: Micro-pHAT: A re-envisioned sensor design for measuring seawater pH and Total Alkalinity in situ.
Guilhereme Fernandes Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held over Zoom** Meeting ID: 916 5866 2086 Passcode: GuilMS https://hawaii.zoom.us/j/91658662086 The overall impact of the Anthropocene era on the oceans has several branches including over fishing, warming, deoxygenation, and acidification. One of the main sources of perturbation is increased emissions of CO2 to the atmosphere. The oceans play a key role in global carbon cycle and absorb and store a fraction of this excess CO2. (Gale Hoare, 2012). One of the greatest challenges in quantifying the oceanic component of the