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The International Journal of the Royal Society of Thailand
Volume XII, 2020

The Journal of the Royal Society of Thailand

Issue Editor Prof. Kittikhun Dr. phil Pornsan Watanangura, FRS (T)
Co-Issue Editor Prof. Dr. Pasuk Phongpaichit, FRS (T)
Advisor Professor Dr. Surapol Issaragrisil, FRS (T),
President, The Royal Society of Thailand

Language Editors Ms. Doris Wibunsin
Mr. Scott Humphries
Mr. Adam C. Reekie
Editorial Assistant Mr. Nadh Wisidhwatchara

Editorial Board
Associate Prof. Dr. Kris Chatamara, FRS (T), Academy of Science
Professor Narattapholl Charoenphandhu, AFRS (T),
Prof. Dr. Pasuk Phongpaichit, FRS (T), Academy of Moral and Politics
Prof. Kittikhun Dr. phil Pornsan Watanangura, FRS (T), Academy of Arts
Prof. Dr. Prinya Chindaprasert, AFRS (T), Academy of Science
Professor Sasithon Pukrittayakamee, FRS (T), Academy of Science
Professor Srisurang Poolthupya, FRS (T), Academy of Arts
Ms. Duangta Tancho, Secretary-General
Ms. Saengchant Sansupa, Former Deputy Secretary-General
Miss Piyaratt Inorn, Director of Science Division
Miss Kanokporn Chuenjaidee, Literateur, Professional Level
Mr. Nadh Wisidhwatchara, Literateur, Practitioner Level
Opinions expressed in the Journal are those of the authors. They do not represent
the views of the editors or of the Royal Society. Articles are subject to peer-review and
approval by the editors.
ISSN 1906-7879
Printing Tana Press Co., Ltd.
e-mail address: tanapress@gmail.com

Distributor The Royal Society of Thailand
Office The Royal Society of Thailand
Sanam Suea Pa, Khet Dusit
Bangkok 10300, Thailand
Tel. (66) 2 356 0466-70
http://www.royalsociety.go.th
e-mail address: ripub@orst.go.th
© The Royal Society of Thailand 2020

Cover Design : Prof. Eakachat Joneurairatana, AFRS (T), Academy of Arts
Back Cover : Emeritus Professor Pishnu Supanimit, AFRS (T), Academy of Arts

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