Acknowledgments
WewishtothanktheThailandResearchFund(TRF)
for providingfinancialsupportthroughtheRoyalGolden
JubileePh.D.ProgramandtheTRFResearchGrant
BRG5380020,andtheThailand’sOfficeoftheHigher
EducationCommissionthroughtheNationalResearch
UniversityProject,includingtheGraduateSchoolof
Chiang MaiUniversitythroughthegeneralsupport.