Research Publications

Academic theses and dissertations are regularly published and widely disseminated in YUOE Journal, Monographs, Universities Research Journal (URJ), Myanmar Academy of Arts and Science (MAAS) Journal, AsTEN Research Journal and International online Journals for sharing knowledge and contributing to the development of our education.

Myanmar Academy of Art & Science List of Research

No. Researcher Title Abstract Year
931 Nay Myo Tun THE CHARACTERIZATION OF TiO2 AND ZnO THIN FILMS BY SPIN COATING TECHNIQUE VIA SOL-GEL METHOD Nowadays, the nano-materials have gained great interest all over the world due to high their surface area to mass or volume ratios. In the present study, Titanium Dioxide (TiO2) and Zinc Oxide (ZnO) thin films were investigated. Zinc acetate dehydrate , potassium hydroxide, methanol (CH3OH), Titanium isopropoxide and 2- methoxy ethanol were used as the starting materials for Titanium Dioxide (TiO2) and Zinc Oxide (ZnO) sol-gel to enhance the thin films. Non-electrolytic glass was also used as the substrate for both thin films. Spin coating technique was mainly applied for fabrication of the TiO2 and ZnO thin films. X-ray Diffraction (XRD) analysis was used to compare the characterization of the crystal nature and crystallite sizes of those obtained thin films. Scanning Electron Microscopy (SEM) analysis was also mentioned to monitor the morphology of both thin films. LCR meter was finally used to characterize the electrical properties of TiO2 and ZnO thin films. 2020
932 Khin Nwe Zin Tun SEPARATION OF MICROPARTICLES USING ULTRASONIC STANDING WAVE Acoustic particle separation in millimeter scale channel is becoming a useful technology for microfluidics to control micro sized particles or cells. Particle separation methods have widely used in medical, chemical, biological and life science. In this paper, modern method of particle separation focuses on acoustic method. This technology is based on inducing an ultrasonic standing wave inside a millimeter scale channel. Ultrasonic standing wave is generated across a microfluidic channel by piezoelectric transducer integrated in one of the channel wall. This standing wave enables particles to aggregate its pressure node or anti-node lines due to acoustic radiation force. Acoustic radiation force is a function of the density and compressibility of the particles and fluid. In this study, 10 ?m particles will be concentrated in water by using ultrasonic standing wave at 2.2 MHz. The objectives of this study are to obtain the fundamental understanding of particle manipulation in millimetre scale rectangular channel at resonance frequency. And then, two-dimensional theoretical model is developed for particle position calculations. The acoustic field numerical models will be constructed using the finite element methods in COMSOL Multiphysics to estimated number of separation lines and acoustic radiation force. The results of this acoustic based COMSOL simulation approach will be compared with the theoretical results. 2020
933 Mya Thet Hnin IDENTIFICATION OF DYNAMICS CHARACTERISTICS IN A ROTOR BEARING SYSTEM Vibrations are found almost everywhere in rotating machines. The most common rotating machinery fault is mass unbalance, which is caused by uneven distribution of the mass. In this study, dynamics characteristics of rotor bearing system has been investigated and verified by numerical simulation and experimental measurements. A simple rotor model is considered in the present work. The purposes of this paper are to identify the natural frequencies of rotor bearing system and study the vibration responses due to rotor unbalance. This numerical simulation is done using COMSOL Multiphysics FEM Software Package. The simulation results are verified by rotor bearing test rig for unbalance and residual unbalance conditions. 2020
934 Mar Mar Htay ANALYSIS OF SINGLE-PARTICLE ENERGY LEVELS OF A NEUTRON IN Pb 208 AND LAMBDA IN Pb 209 ^ We calculated single-particle energy of a neutron in 208Pb and single-particle energy of a lambda in Pb 209 ^ with harmonic oscillator, Woods-Saxon without spin-orbit and with spin-orbit potentials. In these models, We solved by using Numerove's method to obtain single-particle energy levels in 208Pb and Pb 209 ^ . This model can also be extended to include the more complex configurations that arise for the nuclei with nucleon numbers that are in between the magic numbers. The lambda single-energies for 1s,1p,1d,1f states in Pb 209 ^ and neutron single-energies for various states in 208Pb are calculated by using Woods-Saxon with spin-orbit potentials. The results of our theoretical calculation for Pb 209 ^ are compared with experimental data and with the previous theoretical work. It is observed that our results are nearly agreement with experimental results. Therefore, Numerov's method is suitable to search single particle energy levels. 2020
935 Hlaing Zin Myint DISTRIBUTION SYSTEM RELIABILITY IN SHWE SAR YAN PRIMARY SUBSTATION This paper is intended to find the most reliable method in distribution by using protective devices because high reliability power system is urgently needed in Myanmar. Approximately 80% load interruptions are due to breakdown in distribution system and insufficient supply. Therefore, it is important to understand the impact of the outages on the customer’s outage costs, system adequacy and security. In this research, the impacts of protective devices installation on distribution system reliability were analyzed using analytical method and evaluation techniques. Load data on the feeders were collected from Shwe Sar Yan primary distribution substation from December 2017 to December 2018 and system data were calculated on monthly basis for one year. In this research, fuses were used in every lateral line for lateral protection and it could be seen that the energy not supplied (ENS) in feeder 1 was decreased from 448.92 MWh/yr to 32.91 MWh/yr. By using fuses, total ENS were reduced from 17207.11 MWh/yr to 4451.65 MWh/yr in all feeders besides it was abated from 17207.11 MWh/yr to 4377.14 MWh/yr because of disconnecting switch and also depleted from 17207.11 MWh/yr to 4416.71 MWh/yr by 90% protection failure. In this research, reliability improvement scheme was tested as lateral protection with fuse, feeder protection with disconnecting switches and effect of protection failure rate and then the amount of total ENS were reduced too much during one year. In this research, using disconnecting switches method is the best. By studying this research, it could be chosen the most reliable method in distribution system. 2020
936 Pwint Hlaing Ni STRUCTURAL ANALYSIS AND PHASE FORMATION OF PbO - MnO2 SOLID SOLUTIONS (Pb2MnO4 STRUCTURE) PbO - MnO2 solid solutions (Pb2MnO4 structure) are prepared by using starting materials, PbO and MnO2 with equal molar ratio and solid state reaction method. The mixed samples are heat treated at 600 oC, 650 oC, 700 oC, 750 oC and 800 oC for 3 hrs, respectively. After heat treatment schedule, structural properties and phase formation of the samples are characterized by using XRD. From the XRD investigation, structural properties, such as, lattice parameters, lattice micro strain and crystallite size are evaluated. Furthermore, variation of sintering temperature with structural properties are also examined. 2020
937 Myint Myint Kyi OPPORTUNITIES AND CHALLENGES TO RURAL ENTREPRENEURSHIP IN BILU ISLAND, MON STATE, MYANMAR* This paper intends to explore opportunities and challenges to do business in Bilu Island, Mon State, Myanmar. There are 78 villages on this island. This paper focuses on three villages where entrepreneurs are doing home businesses and each village has at least 15 businesses. The observation was first conducted. By observation, the distinct contexts of three villages are found out. After observation for general review, the focus group discussion method is applied to explore opportunities and challenges to do business in these villages. Four focus group discussions (discussions of 48 entrepreneurs) are conducted. From these focus group discussions, the common factors (either opportunities and challenges) emerged. Then, the structured questionnaire is developed by focusing on findings from focus group discussions. The personal interview method is applied by using this questionnaire. The data are collected from 191 entrepreneurs from these three villages. Only 126 entrepreneurs responded to survey. From descriptive analysis, it is found that challenges are more in Ywalutt and Mudoon villages. The challenges of these two villages are financial literacy, market assess, availability of raw materials, skills needed, economies of scale, and transportation. Their opportunities are credit assess, innovation, visits of tourists and visits of local people. However, the visits of tourist have no impact on entrepreneurs of Mudoon village. Kawt Dyut village is distinct from other two villages. Its opportunities are credit assess, financial literacy, market assess, skills needed, availability of raw materials, and economies of scale. Innovation, transportation, visits of tourists, and visits of local people are not impacting on entrepreneurs in this village. Entrepreneurs are not facing challenges to run their businesses. On the Bilu Island, the eco-system (raw materials, workers, market needs, and finance) of a village should collaboratively support to major businesses of this village. Project of one village one product should be implemented in Bilu Island because villages have distinct opportunities and challenges. 2020
938 Sanda Win JOB SATISFACTION AND ORGANIZATIONAL COMMITMENT OF ACADEMIC STAFF OF PUBLIC UNIVERSITIES IN YANGON The main objective of the study is to analyze the job satisfaction and organizational commitment of academic staff of public universities in Yangon. The descriptive and analytical research methods are used to meet the objectives of the study. A total of 365 academic staff from three selected public universities in Yangon is surveyed by using two-stage random sampling method. The academic staff perceptions on selected workplace characteristics, and job characteristics are explored in this study. According to the results, two demographics variable (position, and working experience), and four workplace characteristics variables (relationship with co-workers and supervisors, adequacy of facilities and resources, training opportunities, and promotion), and five job characteristics variables (skill variety, task identity, task significance, autonomy, and feedback) have positive significant relationship with job satisfaction, and one workplace characteristic variable (workload) has a negative significant relationship with job satisfaction. Two demographics variables (position, and working experience), and three workplace characteristics variables (relationship with co-workers and supervisors, adequacy of facilities and resources, training opportunities), and four job characteristics variables (skill variety, task identity, task significance, and autonomy) have a positive significant relationship with organizational commitment. From the analysis, job satisfaction also has a positive significant relationship with organizational commitment. Accordingly, job satisfaction and organizational commitment have a positive significant impact on intention to stay. Therefore the study highlights a more comprehensive understanding of academic staff job satisfaction and organizational commitment based on demographic characteristics, workplace characteristics, and job characteristics of public universities in Yangon. The results of this study are encouraging for policy makers in higher education, and management of public universities as it suggests opportunities for increasing job satisfaction, and organizational commitment of public universities. 2020
939 Kyi Kyi Thant ENTREPRENEURIAL COMPETENCIES OF GARMENT MANUFACTURERS IN WUNDWUN TOWNSHIP This study emphasizes on identifying entrepreneurial competencies of garment manufacturers located in Thaphan Village, Wundwin Township and analyzing the effects of entrepreneurial competencies on firm performance. Entrepreneurial competencies are of vital importance for sustaining, maintaining, and improving firm performance in an intensely competitive market because garment manufacturing firms are solely owned businesses. In March 2019, primary data was collected from forty garment manufacturers selected by using stratified random sampling method and the sample represents forty percent of each firm group. Structured questionnaires based on strategic, commitment, technical, conceptual, opportunity, communication, learning, and personal competencies, and firm performance were constructed by using five-point Likert scale. Secondary data concerning with the number and types of garment manufacturing firms was collected from Administration Office in Thaphan Village. Multiple regression analysis is applied as the major analysis method and SPSS 22 is used as the main analytical tool. According to the findings, commitment, technical, and communication competencies have significant and positive effects on performance of garment manufacturing firms. On the contrary, strategic and personal competencies have significant and negative effects on firm performance. Among eight entrepreneurial competencies included in this study, it is found that the communication competence has the largest effect on performance of garment manufacturing firms in Thaphan Village, Wundwin Township. 2020
940 Nwe Ni Aung BUDGETING HABIT BEHAVIOR OF UNDERGRADUATE STUDENTS IN YANGON UNIVERSITY OF ECONOMICS Budgeting habits are important for every person. By the time students are in universities, at least they are in charge of their own finances. How well they manage their personal budget may indicate how well they will manage their company’s budget on the job. This study intends to analyze budgeting habits of undergraduate students in Yangon University of Economics. The study used descriptive and analytical methods and conducted a questionnaire survey on a sample of 375 undergraduate students. It was found that the budgeting habits of students are different based on gender. The study also showed that the significant portions of their budget are used to spend on shopping, eating out, mobile phone expenditures, attending training for their career progress, travelling on short trip with their friends and transportation. It can be seen that the majority of students lack proper budgeting habits. The study suggested that the students should know how much they can spend and how they can improve their budgeting habits. 2020