Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 106 for “"Buoy"”.
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Design of a mobile coastal communications buoy
… type of telemetry instrumentation was to be a buoy which could not only withstand the often harsh conditions off the northeastern coast of America (specifically, Cape Ann), but do so while exhibiting an exceptionally small response in heave and roll. A spar type buoy was designed and built at …
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Self-sustaining power supply for a low-power sea buoy
… for projects based on smaller electronics. Sea buoys are used for all manner ofoceanic research and often use low-powered electronics to achieve their tasks. This thesisfocuses on the creation of a self-sustaining power supply for such a buoy and looks into theviability of such a device. …
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Dynamic response analysis of spar buoy floating wind turbine systems
… design of a synthetic mooring system for spar buoy floating wind turbines functioning in shallow water depths. Nacelle acceleration, static and dynamic tensions on catenaries, the maximum tension acting on the anchors are considered as design performances, and a stochastic analysis method has …
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Interpretation of force vector recorder data describing buoy system dynamics
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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The feasibility of sodar wind profile measurements from an oceanographic buoy
… wind speed measurements from an oceanographic buoy using a Doppler sodar. In the fall of 2005, we deployed a Scintec SFAS sodar on an ASIS buoy. Roughly one week of buoy motion data and one day of sodar observations were collected. Data from both this deployment, and the Martha's Vineyard …
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A survey of internal tides as seen in moored buoy records
… decomposing current records from the WHOI moored buoy archive. Estimates are made of the barotropic and baroclinic modes 1-4 for multiple locations, primarily in the North Atlantic and North Pacific. Estimates are also made for energy flux rates at some locations. The implied global dissipation …
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The feasibility of sodar wind profile measurements from an oceanographic buoy
… speed profile measurements from an oceanographic buoy using a Doppler sodar. In the fall of 2005, we deployed a Scintec SFAS sodar on an ASIS buoy. Roughly one week of buoy motion data and one day of sodar observations were collected. Data from both this deployment, and the Martha's Vineyard …
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The Study of Weddell Sea Ice using passive microwave and buoy data
… pressure) from 4 Nimbus-tracked drifting buoys. Ice concentrations are retrieved from the SMMR data by applying a cluster analysis algorithm developed by J. Comiso of NASA. Analyses of computed differential kinematic parameters (DKP)s of the buoy array offer insight into the complex …
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UCT SHARC Buoy V3.0: Waves-in-ice measurement in the Antarctic MIZ
… and seasonal sea ice cycles. The UCT SHARC Buoy has been developed to collect and measure in situ wave data that characterises the interaction between ocean waves and sea ice. It aims to do this accurately and with a platform that is cost-effective enough to deploy at scale. To achieve this, …
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Energy harvesting using ocean data acquisition system (ODAS) buoy for coral reef monitoring
… is by using Ocean Data Acquisition System (ODAS) Buoys. Generally, the buoy is a system that used to monitor and collect data for oceanographic and meteorological research purposes. The long-term environmental anomalies study will have required lots of energy due to the usage of sensors and …
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Reconstructing 3D ocean temperature fields from real-time satellite and buoy surface measurements
… Physical sensors (such as satellites, AUVs, or buoys) can collect data at specific points or regions, but are often scarce or inaccurate. Here, we present a framework to build improved spatiotemporal models that combine dynamics inferred from high-fidelity numerical models with measurements from …
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Studies of Arctic Tropospheric Ozone Depletion Events Through Buoy-Borne Observations and Laboratory Studies
… observations from several ice-tethered buoys deployed around the Arctic Ocean. These observations include detection of ozone, bromine monoxide, and measurements of temperature, relative humidity, atmospheric pressure, wind speed, and wind direction. To assess whether the O-Buoys were …
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Experimental analysis of an energy self sufficient ocean buoy utilizing a bi-directional turbine
… Hole Oceanographic Institute offshore monitoring buoy using a unique gumby hose mooring system. The buoy's mission is to monitor the Massachusetts Bay for Right whale vocalizations. The turbine needed to convert a suitable amount of energy without interfering with the buoy's overall survivability …
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Analysis of an axisymmetric pneumatic buoy by reciprocity relations and a ring-source method
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1984.
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Boat-shaped Buoy Optimization of an Ocean Wave Energy Converter Using Neural Networks and Genetic Algorithms
… blue economy. The shape of the floating body, or buoy, of the point absorber type WEC is important for the wave energy capture ratio and for the current drag force. In this work, a new approach to optimize the shape of the point absorber buoy is developed to reduce the ocean current drag force on …
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An investigation of wind- and wave-driven dynamics in Antarctic sea ice from multiple types of buoy arrays
… ice cover. This was done using multiple types of buoy arrays, which were operational in different regions around Antarctica and during different seasons and years. The thesis demonstrated that atmospheric (wind) forcing has a dominant physical control on ice drift. The transfer of momentum from …
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Systems-Theoretic Accident Model and Processes (STAMP) Applied to a U.S. Coast Guard Buoy Tender Integrated Control System
… control system used on U.S. Coast Guard buoy tenders. The legacy system installed on the Service's 16 sea-going buoy tenders experienced numerous incidents that had potential to be hazardous to the ships and their crews. Faced with the dual needs of ensuring safety of mission execution …
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Fluid-Structure Interaction Modeling of a Flexible-Inflatable Heaving Wave Energy Converter Through Generalized Modes
… (WEC), usually consists of a rigid body buoy that can be efficiently modeled using existing WEC simulation tools. However, new wave energy technologies have looked to utilize flexible buoy structures to decrease costs, improve power generation, and increase portability. In addition to …
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Recording, in-situ processing and near real-time satellite transmission of acoustic data from a low-cost marine drifter buoy
… a low-cost, satellite-linked acoustic drifter buoy system capable of real-time underwater noise assessment. The thesis begins with a general introduction to marine soundscapes and underwater radiated noise (URN), covering how anthropogenic sound overlaps with biological sound and the respective …
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