Empirical mode decomposition (EMD) is a signal processing method that produces data-driven time-frequency representation suited to characterize time-varying and nonlinear phenomena. In EMD, intrinsic functions (IMF) are sequentially estimated from the of interest represent different oscilation modes produce an orthogonal original information. Different algorithms have been proposed for EMD esti...

The long term goal of this work is to develop a fundamental understanding and predictive capability of the underlying physics of the interaction of nonlinear internal waves (NLIWs) with the continental shelf seafloor over a broad range of environmental conditions. We are particularly interested in how such interactions impact underwater optics and acoustics and shelf energetics and ecology by s...

SONAR is the acronym for SOund Navigation And Ranging. Sonar techology is similar to other technologies such as: RADAR = RAdio Detection And Ranging; ultrasound, which typically is used with higher frequencies in medical applications; seismics, which typically uses lower frequencies in the sediments. The knowledge and understanding of underwater sound is not new. Leonardo Da Vinci discovered in...

Underwater Wireless Sensor Network (UWSN) communication at high frequencies is extremely challenging. The intricacies presented by the underwater environment are far more compared to the terrestrial environment. The prime reason for such intricacies are the physical characteristics of the underwater environment that have a big impact on electromagnetic (EM) signals. Acoustics signals are by far...

The Finite Element Discretization for Stream-Function Problems on Multiply Connected Domains M. B. van Gijzen,∗ C. B. Vreugdenhil,† and H. Oksuzoglu‡ ∗TNO Physics and Electronics Laboratory, Department of Underwater Acoustics, P.O. Box 96.864, 2509 JG Den Haag, The Netherlands; †Faculty of Technology & Management, Twente University, P.O. Box 217, 7500 AE Enschede, The Netherlands; ‡Department o...

1Research Department for Underwater Acoustics and Marine Geophysics, Bundeswehr Technical Centre for Ships and Naval Weapons, Naval Technology and Research (WTD 71), Klausdorfer Weg 2, 24148 Kiel, Germany 2Navy Center for Applied Research in Artificial Intelligence, Naval Research Laboratory, 4555 Overlook Avenue S.W., Washington, DC 20375, USA 3Acoustic Research Laboratory, National University...