Home | Projects | Publications | Experiments

Faculty

Prof. Purnima Ratilal

Postdoctoral Associate

Dr. Elizabeth Thorp Küsel

Graduate Students

Mark Andrews

Zheng Gong, Roger

Duong Tran

Undergraduate Students

Saumitro Dasgupta


 

 

Projects

  • A remote acoustic sensing system for rapidly imaging and localizing schools of fish and other biology over wide areas, spanning thousands of square kilometers, in near real time, including rapid-at-sea navigation, charting and registration.

  • An Extinction Theorem for object scattering in a dispersive waveguide. This theorem will be used to design an acoustic ''burglar alarm'' or ''trip-wire'' system for detecting submerged objects.

  • Physics-based model for the statistics (mean and spatial covariance) of the forward propagated acoustic field in a dispersive ocean waveguide containing random inhomogeneities. Model applied to analyze long range acoustic propagation through internal waves, oceanic bubble clouds, fish schools and seabottom surface and volume inhomogeneities.

  • Unified full-field computational model for 3-D acoustic target scattering and reverberation in a range-varying ocean waveguide. The model has been applied to show that densely concentrated fish schools can be imaged remotely from tens of kilometers range in continental shelf environments.

  • Long-range Synthetic Aperture Sonar (SAS) system for localizing objects with acoustics in highly dispersive shallow water waveguides.

  • Fully coherent nonlinear wave and object scattering model. Applied to analyze mechanisms for nonlinear wave generation in medical ultrasonic imaging.

  • Full-field model to simulate the performance of a scanning ultrasound vibrometer. Applied in landmine confirmation research to investigate ultrasound measurement of ground displacement and velocity.

  • Low frequency instantaneous wide-area active seismic imaging of shallow buried tunnels.

 

 

 

Image of waves adapted from "Lines of Waves II" by _somebody (on Flickr). Published Under a Creative Commons License.
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