Dr. Vladimir E. Ostashev is a government expert for the U.S. Army Engineer Research and Development Center. He earned a PhD in physics from the Moscow Physics and Technology Institute, Russia in 1979. His undergraduate and graduate advisor was Prof. Valerian Tatarskii. In 1992, Dr. Ostashev earned a degree of Doctor of physical and mathematical sciences from the Acoustics Institute, Moscow, which is similar to Habilitation in Western Europe. Since 1979, Dr. Ostashev worked at the Obukhov Institute of Atmospheric Physics (Moscow, Russia), New Mexico State University (Las Cruces, New Mexico), and until recently, CIRES/CU. Dr. Ostashev has also held visiting positions at the University of Oldenburg (Germany), Ecole Centrale de Lyon (France), and Open University (UK). He is a fellow of the Acoustical Society of America, and an associate editor of the Journal of the Acoustical Society of America and JASA Express Letters.