Doctor of Philosophy 1.Dr.Amnart Khongmanee 2.Dr.Phornphan Sornchuer 3.Dr.Pronrumpa Ngamsiri 4.Dr.Sakkarin Bhubhanil 5.Dr.Suthat Chottanapund Master of Science 1.Ms.Lampet Wongsaroj 2.Ms.Rudeemars Janthadee 3.Mr.Sorayut Chattrakarn 4.Ms.Suparat Giengkam