Acknowledgment
The author would like to thank The Royal Golden Jubilee Ph.D.
Program, Thailand Research Found (RGJ-TRF), University of Hawaii
at Manoa (UHM), East-West Center (EWC), Associate Professor Rasmi
Choosongdej (the RGJ advisor), Professor M.R.Suriyavudh Sukhasvasti
and Associate Professor Thanik Lertcharnrit for supporting this research.