1. Professor, School of Naval Architecture and Marine Engineering, National Technical Univ. of Athens, 9 Heroön Polytechniou Ave., Zografos Campus, Athens 15773, Greece (corresponding author).
2. Ph.D. Candidate, Dept. of Civil Engineering, Univ. of Thessaly, Volos 38334, Greece.
3. Postdoctoral Research Fellow, School of Naval Architecture and Marine Engineering, National Technical Univ. of Athens, 9 Heroön Polytechniou Ave., Zografos Campus, Athens 15773, Greece.