Ministry of Education

Department of Higher Education

Dagon University

Dagon University

Research Journal

April, 2020 Vol. 11 Dagon University

Research Journal Volume 11

Editorial Board Executive Editor Prof. Dr. Nu Nu Yi, Pro-Rector, Dagon University Editor in Chief Prof. Dr. Nay Thwe Kyi, Pro-Rector, Dagon University Editors (, Earth Science and Life Science) Prof. Dr. Cho Cho Win, Head of Department of , Dagon University Prof. Dr. May Myint Si, Head of Department of , Dagon University Prof. Dr. Hla Hla Kyi, Head of Department of Mathematics, Dagon University Prof. Dr. Lu Lu Aung, Head of Department of Zoology, Dagon University Prof. Dr. Myat Myat Moe, Head of Department of , Dagon University Prof. Dr. Kyi Kyi Maw, Head of Department of Geology, Dagon University Prof. Dr. Khin Hla Mon, Head of Department of Industrial Chemistry, Dagon University Dr. Yi Mon Win, Associate Professor, Head of Department of Computer Studies, Dagon University Editors (Humanity, Social Science and Environment Science) Prof. Dr. Htate Tin Han, Head of Department of , Dagon University Prof. Dr. Thi Thi Tun, Head of Department of English, Dagon University Prof. Dr. Kyi Lint, Head of Department of , Dagon University Prof. Dr. Phyu Su Aung, Head of Department of , Dagon University Prof. Dr. Myint Myint Sein, Head of Department of , Dagon University Prof. Dr. Than Aung Htwe, Head of Department of , Dagon University Prof. Dr. Mi Khin Saw Aung, Head of Department of , Dagon University Prof. Dr. Tin Than Myint, Head of Department of Oriental Studies, Dagon University Prof. Dr. Nge Nge, Head of Department of International Relations, Dagon University Prof. Dr. Nyut Nyut Win, Head of Department of , Dagon University Prof. Dr. Kyawt Hmu Aung, Head of Department of , Dagon University

Ministry of Education Department of Higher Education Dagon University

Dagon University Research Journal

Published by Research Development Committee, Dagon University, Republic of the Union of Myanmar

Vol. 11 April, 2020

FOREWORD We are very pleased that “Dagon University Research Journal” is presenting its 11st volume. This issue contains thirty eight outstanding articles which shed light on contemporary research questions in social science, natural science, law, computing, and language and literature fields. We are also delighted that the researches from variable fields demonstrate an interest to share their research with the readers of this journal. This research journal is a collection of the best papers submitted by different departments of Dagon University.

Researchers must publish. It is said that a good research work is not really finished until it has been written and published. Results must be communicated and discussed with the rest of the researches to be validated or refuted. Moreover, they need to be shared with the rest of society. However, useful research is often locked inside institutions, published as internal reports only. Other interesting results lie in libraries as thesis and monographs, out of the reach of the academic community. Recently education reform has been launched in our country. At the same time, we suffer increasing pressure from Departments of Higher Education, Scientific Committees, Research Councils, Education Ministries, etc., to publish regularly and, preferably, in widely diffused, high standard journals. Thus, researchers might try to find a subject which is very new, cutting edge or of “global” in order to get their articles easily accepted in a major international journal. As we were aware at the first issue, a journal needs commitment, not only from editors but also from editorial boards and the contributors. Without the support of our editorial boards we would not dare to start and continue. Special thanks, also, go to the contributions of the journal for their trust, patience and timely revisions. We continue welcome article submissions in all fields of arts and science.

Professor Dr. Nu Nu Yi Pro-Rector Dagon University