1. Associate Prof., C. E. Dept., Hokkaido Institute of Technology, Sapporo Japan
2. Professor, Civil Engineering, Hokkaido University, Sapporo, Japan
3. Assistant Prof., Mine R & D Engineering, Hokkaido University, Sapporo, Japan
4. Senior Researcher, R & D Division, Nettetsu Cement Co., Ltd, Muroran, Japan
5. President, Lintek International, Inc., Chicago