1. Assistant Professor (Contract), Dept. of Materials Science and Engineering, Univ. of Ioannina, Ioannina 45110, Greece (corresponding author).
2. Associate Professor, Dept. of Urban Management, Graduate School of Engineering, Kyoto Univ., C1-2-236, Kyoto-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan.
3. Project Manager, Civil Engineering Headquarters, Tobishima Corp., 2-Banchi, Sanbancho, Chiyoda-ku, Tokyo 102-8332, Japan.