Professor Dr. Edouard B. Manoukian did his graduate studies at McGill and at the University of Toronto in Canada, receiving his M.Sc. and Ph.D. degrees in 1968 and 1971, respectively. He carried out research at the Theoretical Physics Institute of the University of Alberta, the Dublin Institute for Advanced Studies, and the Centre de Recherches Mathématiques Appliquées of the University of Montreal. In 1978 he joined the staff of the Department of National Defence of the Royal Military College of Canada and was appointed as a full professor in 1985. Presently E.B. Manoukian is a professor in the School of Physics of the Suranaree University of Technology. He has authored several books including the one entitled "Renormalization" (ISBN: 0124694500, New York: Academic Press, 1983) which may be of interest to readers of the present book, and he has published over 160 research papers on most aspects of theoretical physics.