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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 ...
A computational approach to the quantification of animal camouflage
(Massachusetts Institute of Technology, 2014)
Evolutionary pressures have led to some astonishing camouflage strategies in the animal kingdom. Cephalopods like cuttlefish and octopus mastered a rather unique skill: they can rapidly adapt the way their skin looks in ...
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 ...
Estimation and tracking of rapidly time-varying broadband acoustic communication channels
(Massachusetts Institute of Technology, 2006)
This thesis develops methods for estimating wideband shallow-water acoustic communication channels. The very shallow water wideband channel has three distinct features: large dimension caused by extensive delay spread; ...
Internal tide generation by tall ocean ridges
(Massachusetts Institute of Technology, 2009)
Internal tides are internal waves of tidal period generated by tidal currents flowing over submarine topography. Tall ridges that are nominally two-dimensional (2-D) are sites of particularly strong generation. The subsequent ...
Three-dimensional acoustic propagation through shallow water internal, surface gravity and bottom sediment waves
(Massachusetts Institute of Technology, 2011)
This thesis describes the physics of fully three-dimensional low frequency acoustic interaction with internal waves, bottom sediment waves and surface swell waves that are often observed in shallow waters and on continental ...
Autonomous & adaptive oceanographic feature tracking on board autonomous underwater vehicles
(Massachusetts Institute of Technology, 2015)
The capabilities of autonomous underwater vehicles (AUVs) and their ability to perform tasks both autonomously and adaptively are rapidly improving, and the desire to quickly and efficiently sample the ocean environment ...
Uncertainty Quantification in ocean state estimation
(Massachusetts Institute of Technology, 2013)
Quantifying uncertainty and error bounds is a key outstanding challenge in ocean state estimation and climate research. It is particularly difficult due to the large dimensionality of this nonlinear estimation problem and ...