Dr. Serm Janjai Department of Physics Silpakorn University Nokorn Pathom 73000,THAILAND Tel: +663-427-0761 Fax:+663-427-1179 E-mail: serm.janjai@gmail.com
Mr.Somjet Pattarapanitchai Department of Physics Silpakorn University Nakon Phatom 73000,Thailand Tel: +663-427-0761 Fax:+663-427-1189 E-mail: pan30826@gmail.com