1. Department of Physics and Astronomy and National Center for Physical AcousticsUniversity of MississippiOxford Mississippi USA
2. Division of Marine ScienceStennis Space Center, University of Southern MississippiHancock Mississippi USA
3. Department of MathematicsUniversity of Southern MississippiHattiesburg Mississippi USA
4. Department of PhysicsCenter for Nonlinear Dynamics, University of Texas at Austin Texas USA