1. Assistant, Ghent Univ., Division of Maritime Technology, Technologiepark Zwijnaarde 904, Gent B9052, Belgium.
2. Professor, Ghent Univ., Division of Maritime Technology, Technologiepark Zwijnaarde 904, Gent B9052, Belgium.
3. Formerly, Research Assistant, Ghent Univ., Division of Maritime Technology, c/o Flanders Hydraulics Research, Berchemlei 115, Antwerpen B2140, Belgium.
4. Researcher, Flanders Hydraulics Research, Berchemlei 115, Antwerpen B2140, Belgium.