1. Assistant Professor, Dept. of Civil Engineering, National Yang Ming Chiao Tung Univ., Taiwan.
2. Assistant Professor, Dept. of Civil Engineering, Pontificia Universidad Católica De Chile, Chile.
3. Professor, Dept. of Civil Engineering, National Taiwan Univ., Taiwan.
4. Adjunct Professor, Dept. of Civil Engineering, National Taiwan Univ. of Science and Technology, Taiwan.