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Geoacoustic inversion by mode amplitude perturbation
(Massachusetts Institute of Technology, 2007)
This thesis introduces an algorithm for inverting for the geoacoustic properties of the seafloor in shallow water. The input data required by the algorithm are estimates of the amplitudes of the normal modes excited by a ...
A parallel hypothesis method of autonomous underwater vehicle navigation
(Massachusetts Institute of Technology, 2009)
This research presents a parallel hypothesis method for autonomous underwater vehicle navigation that enables a vehicle to expand the operating envelope of existing long baseline acoustic navigation systems by incorporating ...
Adaptive sampling in autonomous marine sensor networks
(Massachusetts Institute of Technology, 2006)
In this thesis, an innovative architecture for real-time adaptive and cooperative control of autonomous sensor platforms in a marine sensor network is described in the context of the autonomous oceanographic network scenario. ...
Quantifying hurricane wind speed with undersea sound
(Massachusetts Institute of Technology, 2006)
Hurricanes, powerful storms with wind speeds that can exceed 80 m/s, are one of the most destructive natural disasters known to man. While current satellite technology has made it possible to effectively detect and track ...
Stochastic mapping for chemical plume source localization with application to autonomous hydrothermal vent discovery
(Massachusetts Institute of Technology, 2006)
This thesis presents a stochastic mapping framework for autonomous robotic chemical plume source localization in environments with multiple sources. Potential applications for robotic chemical plume source localization ...
Forward sound propagation around seamounts : application of acoustic models to the Kermit-Roosevelt and Elivs seamounts
(Massachusetts Institute of Technology, 2009)
The Basin Acoustic Seamount Scattering Experiment (BASSEX) of 2004 was conducted to measure forward-scattering around the Kermit-Roosevelt Seamount Complex in the Northeast Pacific. The BASSEX experiment was focused on the ...
Three-dimensional propagation and scattering around a conical seamount
(Massachusetts Institute of Technology, 2007)
In this thesis, a numerically effcient three-dimensional propagation and scattering model is developed based on the three-dimensional coupled mode theory for axisymmetric bathymetry. The three-dimensional coupled mode ...
CFD study of hydrodynamic signal perception by fish using the lateral line system
(Massachusetts Institute of Technology, 2009)
The lateral line system on fish has been found to aid in schooling behavior, courtship communication, active and passive hydrodynamic imaging, and prey detection. The most widely used artificial prey stimulus has been the ...
Application of statistical learning theory to plankton image analysis
(Massachusetts Institute of Technology, 2006)
A fundamental problem in limnology and oceanography is the inability to quickly identify and map distributions of plankton. This thesis addresses the problem by applying statistical machine learning to video images collected ...
Cooperative localization for autonomous underwater vehicles
(Massachusetts Institute of Technology, 2009)
Self-localization of an underwater vehicle is particularly challenging due to the absence of Global Positioning System (GPS) reception or features at known positions that could otherwise have been used for position ...