Problems and Puzzles in Electric Fields

Tadasu Takuma was born in Mie prefecture, Japan, on 30 September 1938. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from the University of Tokyo in 1961, 1963, and 1966, respectively. He worked for the Central Research Institute of Electric Power Industry (CRIEPI) from 1967.to 1995 as a Professor in the Department of Electrical Engineering, Kyoto University from 1995 to 2002 and as a Professor at the Tokyo Denki University from 2004 to 2009. He stayed in Technical University Braunschweig, Germany, from 1973 to 1975. He has been engaged mainly in the study of SF6 gas insulation, gas discharges, environmental problems of transmission lines, numerical field calculation. He is an author of "Electric Fields in Composite Dielectrics and their Applications" (Springer, 2010) and an author/editor of about ten Japanese books.Dr. Takuma received the Maxwell Premium from the Institution of Electrical Engineers, Great Britain in 1974, and three times the book prize from the IEE (the Institute of Electrical Engineers), Japan in 1981, 1991 and 2011, and Commendation from the Minister of State for Science and Technology, Japan in 1992. He is a Fellow of IEEE.
Takatoshi Shindo was born in Tokyo, Japan on November 21, 1953. He received the B. S. degree and M. E. degree in electrical engineering and Ph. D. degree in engineering from the University of Tokyo, Tokyo, Japan in 1976, 1978, and 1992, respectively. He joined the Central Research Institute of Electric Power Industry(CRIEPI),Tokyo, Japan, in 1978. He has been engaged in the study of external insulation of power apparatus, particularly with regard to lightning protection, physics of discharge in long air gaps. From 1987 to 1988, he was a Research Associate in the Department of Electrical Engineering, University of Florida. He is now a Research Advisor Emeritus of CRIEPI. Dr. Shindo is a Fellow of the Institute of Electrical Engineers of Japan and a Fellow of IEEE.