The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Suding Kaday
Division of Physical Sciences, Faculty of Science, Prince of Songkla University, Songkhla
Thailand

Rattanawadee Hedthong
Division of Physical Sciences, Faculty of Science, Prince of Songkla University, Songkhla
Thailand

Thorsak Kittikorn
Division of Physical Sciences, Faculty of Science, Prince of Songkla University, Songkhla
Thailand