ISSN 1905-7873 © 2012 - Maejo International Journal of Science ...

MAEJO INTERNATIONAL JOURNAL
OF SCIENCE AND TECHNOLOGY
Editor
Duang Buddhasukh, Maejo University, Thailand.
Associate Editors
Jatuphong Varith, Maejo University, Thailand.
Wasin Charerntantanakul, Maejo University, Thailand.
Morakot Sukchotiratana, Chiang Mai University, Thailand.
Nakorn Tippayawong, Chiang Mai University, Thailand.
Editorial Assistants
James F. Maxwell, Chiang Mai University, Thailand.
Jirawan Banditpuritat, Maejo University, Thailand.
Prof. Dallas E. Alston
Dr. Pei-Yi Chu
Asst. Prof. Ekachai Chukeatirote
Prof. Richard L. Deming
Prof. Cynthia C. Divina
Prof. Mary Garson
Prof. Kate Grudpan
Assoc. Prof. Duangrat Inthorn
Prof. Minoru Isobe
Prof. Kunimitsu Kaya
Assoc. Prof. Margaret E. Kerr
Dr. Ignacy Kitowski
Asst. Prof. Andrzej Komosa
Asst. Prof. Pradeep Kumar
Asst. Prof. Ma. Elizabeth C. Leoveras
Dr. Subhash C. Mandal
Prof. Amarendra N. Misra
Dr. Robert Molloy
Prof. Mohammad A. Mottaleb
Prof. Stephen G. Pyne
Prof. Renato G. Reyes
Dr. Waya Sengpracha
Dr. Settha Siripin
Prof. Paisarn Sithigorngul
Prof. Anupam Srivastav
Prof. Maitree Suttajit
Assoc. Prof. Chatchai Tayapiwatana
Emeritus Prof. Bela Ternai
Asst. Prof. Narin Tongwittaya
Asst. Prof. Jatuphong Varith
Assoc. Prof. Niwoot Whangchai
Editorial Board
University of Puerto Rico, USA.
Changhua Christian Hospital, Taiwan, R.O.C.
Mae Fah Luang University, Thailand.
California State University Fullerton, Fullerton CA
Central Luzon State University, Philippines.
The University of Queensland, Australia.
Chiang Mai University, Thailand.
Mahidol University, Thailand.
Nagoya University, Japan.
Tohoku University, Japan.
Worcester State College, Worcester,MA
University of Maria-Curie Sklodowska, Poland.
University of Maria-Curie Sklodowska, Poland.
Jaypee University of Information Technology, India.
Central Luzon State University, Philippines.
Jadavpur University, India.
Fakir Mohan University, Orissa, India.
Chiang Mai University, Thailand.
Northwest Missouri State University, USA.
University of Wollongong, Australia.
Central Luzon State University, Philippines.
Silpakorn University, Thailand.
Maejo University, Thailand.
Srinakharinwirot University, Thailand.
College of Engineering and Technology, India.
Naresuan University (Payao Campus), Thailand.
Chiang Mai University, Thailand.
La Trobe University, Australia.
Maejo University, Thailand.
Maejo University, Thailand.
Maejo University,Thailand.
Consultants
Asst. Prof. Chamnian Yosraj, Ph.D., President of Maejo University
Assoc. Prof. Thep Phongparnich, Ed. D., Former President of Maejo University
Assoc. Prof. Chalermchai Panyadee, Ph.D., Vice-President in Research of Maejo University