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 30 for “"significant wave height"”.
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PREDICTIONS OF SIGNIFICANT WAVE HEIGHT IN LAKE OKEECHOBEE, FLORIDA USING APPROACHES RELATED TO SIMPLIFIED STOCHASTIC PROCEDURE AND WAVE ENERGY SPECTRUM
Prediction of significant wave height is critically important to the physical and environmental impact study of coastal, estuarine or large lake environments. In this study, development of predictive models for the determination of time varying significant wave heights in Lake Okeechobee, Florida …
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Analysing modelled nearshore wave climate variability and change as relevant to the traditional handline fishery of the South African South Coast
… have been the subject of recent research, the wave climate aspect of the nearshore sea state has not. In a recent project conducted by the Department of Environmental Affairs and the Council for Scientific and Industrial Research, Simulating WAves Nearshore model outputs spanning 17 years (from …
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Hydrodynamic modeling of towed buoyant submarine antenna's in multidirectional seas
… diameter, density, etc.), sea conditions (significant wave height, development of sea), tow angle, and tow speed. The model then simulates the antenna-sea interaction for the desired duration to collect statistics relating to antenna performance. The model provides design engineers with a …
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Hydrodynamic modeling of towed buoyant submarine antenna's in multidirectional seas
… diameter, density, etc.), sea conditions (significant wave height, development of sea), tow angle, and tow speed. The model then simulates the antenna-sea interaction for the desired duration to collect statistics relating to antenna performance. The model provides design engineers with a …
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Hydrodynamic modeling of towed buoyant submarine antenna's [sic] in multidirectional seas
… diameter, density, etc.), sea conditions (significant wave height, development of sea), tow angle, and tow speed. The model then simulates the antenna-sea interaction for the desired duration to collect statistics relating to antenna performance. The model provides design engineers with a …
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Computer model for a towed submarine communication antenna
… diameter, density, etc.), sea conditions ( significant wave height, development of sea), and tow speed. The model then simulates the antenna-sea interaction for the desired duration to collect statistics relating to antenna performance. The model provides design engineers with a tool to …
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Improving Electromagnetic Bias Estimates
… TOPEX/Poseidon and Jason-1 satellite sea surface height (SSH) estimates. Due to incomplete understanding of the physical processes which cause the bias, current operational models are based on empirical relationships between the bias wind speed and significant wave height. These models reduce RMS …
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Neural network based simulation of sea-state sequences
… annealing, and statistics to simulate the significant wave height (Hs) and mean zero-up-crossing period ( ) of 3-hourly sea-states of a location in the North East Pacific using a proposed distribution called hepta-parameter spline distribution for the conditional distribution of Hs or given …
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Modified inverse first-order reliability method (I-FORM) for predicting extreme sea states
… contours are characterized by combinations of significant wave height (Hs) and energy period (Te) or peak period (Tp) values calculated for a given recurrence interval using a set of data based on hindcast simulations or buoy observations over a sufficient period of record. The use of the …
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Estudo sobre a ocorrência de ressonâncias paramétricas numa plataforma TLWP próxima a um FPSO em ondas irregulares
… presents excessive amplifications for a band of wave periods and heights in the yaw direction. These phenomena were studied by Cruz (2010) and Rivera (2012). Rivera showed that the unstable behavior is caused by internal system excitations of the TLWP-FPSO induced by sway movement. A test was …
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Statistics of amplitude and fluid velocity of large and rare waves in the ocean
The understanding of large and rare waves in the ocean is becoming more important as these rare events are turning into more common observances. In order to design a marine structure or vehicle to withstand such a potentially devastating phenomenon, the designer must have knowledge of extreme waves …
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Study of the Origins of the Sigma-0 Blooms
… are accompanied by an increase in noise in the significant wave height (SWH) and altitude measurements. Since approximately 5% of all data recorded by the satellite contains sigma-0 blooms, it is important to understand their causes so that corrective measures can be taken by NASA. This thesis …
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Studies to Improve Estimation of the Electromagnetic Bias in Radar Altimetry
… the backscattered power versus the phase of the wave. Its purpose is to determine why the normalized EM bias stops increasing and levels out at high wind speeds (about 11 m/s) and then decreases at higher wind speeds. Two possible causes are investigated. First, it could be due to a shift in the …
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OSCILLATING SURGE WAVE ENERGY CONVERTER GEOMETRY OPTIMIZATION FOR DIRECT SEAWATER DESALINATION
… process that is expensive to maintain. Wave energy can be utilized to increase the efficiency of seawater desalination using a wave energy converter (WEC) to lower the external energy requirement. This thesis presents an analysis of scaled down flap-type oscillating surge wave energy …
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Structural analysis and design of floating wind turbine systems
… geometry and loading of the MIT TLP-1 for a 10m significant wave height. The design is based on similar system analysis, classic linear structural theory, American Bureau of Shipping rules and American Petroleum Institute recommended practices. The design is verified using Finite Element Analysis …
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"Performance-based damage survivability of passenger ships and design implications"
… can actually be related to survivability in waves. In order to achieve this, established concepts like the critical significant wave height have been revised. Moreover, the proposed modifications of the s-factor can link it directly to performance-based standards such as Safe-Return-to-Port. …
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Innovative hull design for servicing offshore wind turbines
… an offshore wind farm. Currently there is a 1.5m significant wave height (Hs) limit for the standard “step over” method of transferring personnel to an offshore wind turbine, though this varies with, vessel type, wave period and direction, as well as wind, and current conditions. The thesis aims …
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Measurement and parameterisation of the air-sea CO2 flux in high winds
… mean wind speed was 25 m.s-1. The maximum significant wave height was 11 m.<br/><br/>The initial CO2 flux results were subject to a large, commonly observed humidity cross-sensitivity error. A novel iterative correction procedure was developed, tested against an independent data set and …
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Subaqueous, hurricane-initiated shelf failure morphodynamics along the Mississippi River Delta Front, north-central Gulf of Mexico
… These conditions were characterized by large waves, long wave periods and wave-induced turbulence in the bottom boundary layer and throughout the water column. An evaluation of local and regional MRDF bathymetry data revealed substantial changes in seafloor elevation and the immediate …
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Design and implementation of an ocean observing system: WAVCIS (Wave-Current-Surge Information System) and its application to the Louisiana coast
WAVCIS (Wave-Current-Surge Information System for Coastal Louisiana) was designed to measure meteorological and hydrodynamic phenomena along the Louisiana coast. The information measured includes waves, currents, water depth, surge, turbidity, salinity and meteorological conditions. WAVCIS collects …
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