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
811 Nyunt Nyunt Htay ANALYSIS OF ELEMENTAL CONCENTRATION OF THE HOT SPRING SAMPLES FROM PEDAT, KLONEHTAR AND MAUNGMAGAN IN TANINTHARYI REGION BY USING EDXRF AND AAS METHODS Hot spring samples were collected from Pedat, Klonehtar and Maungmagan in Tanintharyi Region. These samples were quantitative analysed of the concentration of elements by using Energy Dispersive X-Ray Fluorescence (EDXRF) and the Atomic Absorption Spectroscopy (AAS) Methods. It was found that the content of the concentration of elements in these samples are S, Ca, Na, K, Mg, Si, Al and Fe. These elements are not toxic for human. It was observed that extend of elements categorized in above three locations are different by using EDXRF and AAS methods. 2020
812 Lwin Lwin Nwe SYNTHESIS AND ANALYSIS OF CALCIUM COPPER TITANATE CERAMICS Calcium copper titanate ceramics were synthesized by solid-state reaction method. The structural and microstructural properties of sample powder were examined by X-ray diffraction (XRD) and scanning electron microscope (SEM). The capacitance, resistance and dissipated factor of ceramics were measured at frequency range 1 kHz to 25 kHz by LCR meter. The average dielectric constant, of ceramics ( at 850?C for 5h different heat treatment four times) were found to be 94.4,99.4,112.7 and 133.7 in the frequency range from 1kHz to 25kHz. The values of the dielectric loss and conductivity of samples were calculated. 2020
813 Sint Ohnmar INFLUENCE OF NaOH IN THERMAL REDUCTION OF WOLFRAMITE IN ORE MINERAL The annealing process of ore mineral which is important for designing scientific and economic schedule. The samples were collected from Pharchaung Mine in Tanintharyi Region. The 70% wolframite sample (Fe,Mn)WO4 was prepared by magnetic separation method and ore mineral of (Fe,Mn)WO4 were collected in this mine. In this research work, to emphasize the value of considering wolframite as thermal reactions and chemical reactions methods. The behavior of structural tile were investigated using thermal analysis techniques. The weight loss of 70% wolframite sample (Fe,Mn)WO4 was observed from TG curve and the phase transition occurred from DTA curve. The crystal structure of 70% (Fe,Mn)WO4 powder and ore mineral of (Fe,Mn)WO4 were observed by XRD and also the phase changes of this powder were investigated at 450?C and 500?C in three hour. And also demonstrated its application to provide a better understanding of the occurrence and origin of wolframite minerals. Aqueous solution containing sodium hydroxide (NaOH) was used as the alkaline leaching media and it was the most beneficial agent stabilizing the solid phase in the aqueous environment. 2020
814 Wut Hmone Oo EFFECTIVE CONTROL OF SOLAR POWER SYSTEM BY AUTOMATIC TRACKER The research paper presents the design of automatic solar tracking control system based on microcontroller. It consists of the optimize hardware design, which is controlled by a firmware. The source code for the project is written in Mikro C Pro programming language. The main objective of this paper is to provide the maximum energy from solar panel and gives higher efficiency for the solar cells. This designed system is to control the solar panel to remain aligned with direction of the sun. The microcontroller based control circuit drives the DC motor. Microcontroller PIC16F887 is used for controlling the movement of the solar panel. DC motor is controlled by the microcontroller that receives the signals from the transistor driver of light dependent resistor (LDR). The light sensor (LDR) tracks the path of the sun by detecting the light intensity. The design of automatic solar tracker can be categorized into three sections. These are sensor unit, control unit and motor driving unit. For demonstration simplicity, the LED indicators are used to show the rotation of DC motor. 2020
815 Aye Thandar EFFECTIVE OF BAMBOO-CEMENT CONCRETE IN WASTE ENVIRONMENT Bamboo is the common term applied to a broad group (1250 species) of large woody grasses, ranging from 10 cm to 40 m in height. The use of waste materials with pozzolanic properties in concrete production is becoming a worldwide practice. This paper presents investigates the strength performance of concrete using partial blends of cement and bamboo wastes ash. Elemental analysis was conducted on bamboo ash and ordinary portland cement, OPC by EDXRF (Energy Dispersive X-ray Fluorescence) technique to evaluate its percentage composition. Bamboo ash shows pozzolanic activity and it was used as supplementary cementitious material. Bamboo ash was then used to replace OPC by weight in ratio of 0%, 5%, 10%, 15%, 20% and 25% in concrete grade M-20. Based upon the quantities of ingredients of the mixes M-20, (it means the weight ratio of cement : sand :coarse aggregate) grade concretes were prepared. Twelve pieces of 150 mm concrete cubes were prepared. These cubes were tested at 7 days and 56 days of curing ages and then maximum load and compressive strength of cubes were determined respectively. To investigate the pozzolanic behavior of bamboo ash, concrete crushes were analyzed by XRD analysis. It shows the very high concrete strength values could be obtained with (ordinary portland cement and bamboo waste ash) OPC–BWA blended cement concrete when high control measure was applied and at longer days of hydration. Therefore, OPC/BWS blended cement concrete could be used in civil engineering and building works, thereby reducing the cost of production. 2020
816 Aye Hsu Pan INVESTIGATION ON LITHIUM BIS TRIFLUORO METHANE SULPHONYL IMIDE SALT BASED POLYMER ELECTROLYTE FILMS Solid polymer electrolyte films with different weight percent ratios of lithium bis (trifluoro methane sulphonyl) imide (LTFSI) salt were prepared using solution casting method. The conductivity and dielectric response of the solid polymer electrolyte systems were studied within the frequency range of 120Hz and 1kHz at room temperature. The conductivity of an electrolyte depends on the ability of the polymer host to solvate the (LTFSI) salt. Polymers with higher dielectric constant will serve the purpose better. The dielectric constant and electrical conductivity follow the same trend with (LTFSI) salt concentration. It was observed that the magnitude of conductivity had increased with the increase in salt concentration. FTIR and XRD techniques were used in the complexed studies. The values of dielectric constant were decreased with increasing frequency. 2020
817 Mi Aye Aye Mon Hlaing COMPARISON OF CHARACTERIZATION OF BaSnO3 POWDER AND BaSnO3 FILM Barium stannate was prepared from Barium Carbonate and Tin (IV) Oxide by using solid state reaction method had been grown on glass substrate by using spin coating method. Barium Stannate powder and Barium Stannate film were characterized by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD). The crystallite size was investigated from XRD result and the grain size was investigated from SEM result. From calculation, compare the value of crystallite size and grain size of powder sample and film of Barium Stannate. 2020
818 Aye Aye Lwin CHARACTERIZATION OF COPPER-COBALT FERRITES FOR HUMIDITY SENSOR APPLICATION Nanosized Copper-Cobalt ferrites with the general formula CuxCo1-xFe2O4 (where x = 0.00 – 1.00 with the step of 0.25) were prepared by auto-combustion method using Analytical Reagent (AR) grade Copper Nitrate, Cu(NO3)2, Cobalt Nitrate Hexahydrate, Co(NO3)2.6H2O and Ferric Nitrate Nonahydrate, Fe(NO3)3.9H2O. The samples were firstly characterized by X-ray diffraction to examine the crystal structure. The average crystallite sizes were estimated from line broadening of the collected XRD patterns to determine the nanosized ferrites. Microstructural characteristics of grain shape, grain size and homogeneity of the samples were examined by Scanning Electron Microscopy (SEM). It was found that the grain shapes of the samples varied from block shape to stone-like shape with the contents x of Cu. The grain size, generally, of x = 0.50 was the largest one among the investigated samples. For the applications of humidity sensors, the samples were made into circular shape pellets and the variations of the electrical resistance with the corresponding humidity range were studied in this work. 2020
819 KhinMarWin SCATTERING PARAMETERS FOR PROTON-NEUTRON SCATTERING WITH YUKAWA POTENTIAL The purpose of the research work is to calculate the scattering parameters for two-nucleon system with Yukawa potential. We have calculated the scattering phase shift, effective range and scattering length. To calculate the phase shift, the transition matrix (T-matrix) is formulated from Lippmann-Schwinger equation for two-body scattering state. The Lippmann-Schwinger equation is the Schrödinger equation with boundary condition. The numerical values of T-matrix are obtained by using Gauss elimination Method with FORTRAN code. And then, the effective range and scattering length are calculated by using the phase shift. 2020
820 Nan Kyi Kyi Thein PHOTOVOLTAIC PERFORMANCE OF SOLID-STATE DYE-SENSITIZED SOLAR CELLS (SSDSSCS) USING NATURAL DYES EXTRACT The natural dye solutions were extracted from henna leave, red Dragon fruit flesh and red Spinach leave as photosensitizer for solid-state dye-sensitized solar cells (ssDSSCs). In this work, the ssDSSCs were fabricated using these natural dye extracts and their photovoltaic performance was examined against dye extracting temperature and relative ratio of co-solvents (dimethylformamide (DMF) and ethanol (EtOH)). It is found that the device efficiencies are almost insensitive to the extracting temperature for all dye extracts being studied. The efficiency of red Spinach devices decreased with increasing DMF concentration in ethanol whiles those of Henna and red Dragon fruit devices were almost invariant. Thus co-solvent effect would differ system to system. Among all, the efficiency of red Spinach device (extracted at 45 .C in EtOH) is as high as 0.11 %. 2020