1. Department of Basic Science and Mathematics, Faculty of Science, Thaksin University, Songkhla Campus, Songkhla 90000, Thailand
2. Department of Teaching Science and Mathematics, Faculty of Education, Thaksin University, Songkhla 90000, Thailand
3. Giant Dielectric and Computational Design Research Group (GD−CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand