Professor. Y. L. Xuis Chair Professor and Dean of the Faculty of Construction and Environment of the University at The Hong Kong Polytechnic University. He is also author of : "Structural Health Monitoring of Long-Span Suspension Bridges" also published by CRC Press. Dr. J. Heis a postdoctoral fellow at the Department of Civil and Environmental Engineering of The Hong Kong Polytechnic University, focusing on smart civil structures through the synthesis of structural health monitoring, vibration control, energy harvesting and self-repairing.