Dr. H. S. Kim, Ph.D. is a professor with the Department of Materials Science and Engineering, POSTECH, in the Republic of Korea. He is a distinguished professor who has published more than 400 journal paper in the field and is considered one of the top researchers in the area of severe plastic deformation. Dr. Kim is a Fellow of the Korean Academy of Science and Technology and sits on the editorial board of Metals and Materials International and Materials Science and Engineering, as well being the Editorial Director of Korean Powder Metallurgy Institute, the Korean Society for Tech. of Plasticity, and the Korean Institute of Metals and Materials.