Dr. Okubo received the B. Eng., M. Eng., and Ph. D. degrees from the Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo, Japan, in 1985, 1987, and 1990, respectively. His current research interests are nonthermal plasma applications for air pollution control, material surface modification, and numerical simulations of plasmas, aerosols and multiphase fluid flows in environmental engineering. Dr. Okubo is the author of more than 130 peer-reviewed papers in scientific journals and seven books. Now, he is a chairman of Electrostatics Process committee of the IEEE Industry Applications Society, and the fellow of Japan Society of Mechanical Engineers. Dr. Kuwahara received the B. Eng., M. Eng., and Ph.D. degrees in engineering from the Department of Mechanical Engineering, Doshisha University, Kyoto, Japan, in 2002, 2004, and 2008, respectively. He also received a Mastere Specialise degree from Ecole Centrale de Lille, Villeneuve d'Ascq, France, in 2003, and the Ph.D. degree in applied mathematics from Ecole Centrale Paris, Chatenay-Malabry, France, in 2008.