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

Buntoeng Srikarun
School of Engineering and Technology, Walailak University, Nakhon Si Thammarat
Thailand

Prapas Muangjunburee
Department of Mining and Materials Engineering, Faculty of Engineering, Price of Songkla University, Songkhla
Thailand