[1] TENNESSEE TECHNOL UNIV,CTR ELECT POWER,POB 5032,COOKEVILLE,TN 38505
[2] UNIV ZARAGOZA,ETSII,DEPT MECH ENGN,E-50015 ZARAGOZA,SPAIN
[3] NATL TECH UNIV ATHENS,DEPT NAVAL ARCHITECTURE & MARINE ENGN,GR-15710 ZOGRAFOS,GREECE
[4] ECOLE POLYTECH FED LAUSANNE,LENI,CH-1015 LAUSANNE,SWITZERLAND