Professor Keun Hwa Chae received his B.Sc. Physics in 1986 and M.Sc. Physics in 1988 from Yonsei University, Seoul, Korea. In 1994, he received his Ph.D. Degree in Physics from Yonsei University, Seoul, Korea. He was a post-doctoral fellow from 1995 to 1997 at Rutgers -The State University of New Jersey, USA. He is currently working as a principal research scientist at the Korea Institute of Science and Technology, Korea (since 2000). His research fields include ion beam modification of materials and characterization of materials using synchrotron radiation with special emphasis on ferrite research.