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
881 Myint Kyaw Soe DISCOVERY OF DOUBLE STRANGENESS NUCLEAR SYSTEM BY EMULSION COUNTER-HYBRID EXPERIMENT E07 emulsion-counter hybrid experiment has been carried out at J-PARC to discover double strangeness nuclei. The scanning work is performed by establishing automatic track following system which has been successfully developed. More than 100 double hypernuclear events are expected from this experiment. 2020
882 Hla Hla Win STRUCTURE CALCULATION OF O 16 ? NUCLEUS The purpose of this research is to investigate the structure of ?-mesic oxygen nucleus theoretically which is a bound system of ?-meson and Oxygen core nucleus. Since original functional form of ?-N interaction cannot be analytically solved, we have transformed the functional form into Gaussian form by applying the Gauss elimination method. The transformed ?-N potentials are equivalent to that of original potential by using the optimum sets, ?1 =0.05 fm,? N =20 fm and N=20. The ?-nucleus interaction is obtained by folding the ?-N interaction with Oxygen nucleus nuclear density. By applying the ?-nucleus folding potential we have computed the binding energy of O 16 ? system which is 3.2814 MeV and its level width is 0.3704 MeV. 2020
883 Thinzar Lwin ANALYSIS OF PHYSICAL AND CHEMICAL PROPERTIES FOR BIOCHAR FROM RICE HUSK BIOMASS Biomass play significant roles in the production of eco-friendly biochar and as substitutes for renewable sources of energy. In this study, investigations were carried out on physical and chemical analysis of rice husk biochar (RHBs) from rice husk. The rice husk biomass was heated at 300?C for 1h and sieved to the average particle size. The physical and chemical properties of RHBs were determined by direct measurements and calculations. Rice husk biochar (RHBs) were characterized for biochar yield, pH and Bulk Density. The biochar chemical analysis gave the following results; biochar yield of 73% for RHB-HT and 68% for RHB-PT, the pH values of 7.14% and 7.49%, Bulk density of 0.42% and 0.43% for RHBs. RHBs were characterized by analyzing the chemical composition mainly based on X-ray diffraction (XRD), Energy Dispersive X-ray Fluorescence (EDXRF), Fourier transform infrared spectroscopy (FTIR) and surface morphology from Field emission SEM (FE-SEM) and energy dispersive X-ray micro-analysis (EDXA). The XRD showed the carbon amorphous structure of rice husk biochar (RHBs), which consists of surface morphology from FE-SEM. The carbon (C), oxygen (O) and silica (Si) were observed by Energy Dispersive X-ray spectroscopy (EDX). Fourier transform infrared spectroscopy (FTIR) analysis showed the presence of a variety of functional groups for RHBs. The results of the physical and chemical properties of the rice husk biochar provide the prominent source of useful energy. 2020
884 Tin Tin Phyo Lwin DETERMINATION OF RADON CONCENTRATION IN SOME WATER SAMPLES COLLECTED FROM THREE VILLAGES IN SALINGYI TOWNSHIP WITH SSNTDs Water is the most abundant substance on earth, and it is the principal constituent of all living things. Radon dissolved in water can cause to significant health problems for humans through inhalation and ingestion. In the present work, a total of eleven water samples from the three villages near the Mine area in Salingyi Township were analyzed for dissolved radon by using solid state nuclear track detection technique. The principle of this technique/e is based on the production of track in the detector due to alpha particles emitted from radon and its progeny. To detect the alpha track, LR-115 plastic track detectors were used for an exposure time of 100 days. After exposure, the tracks are made visible by chemical etching and counted manually under the binocular microscope. The measurement track density is converted into radon concentration. The concentration of radon has been found to be varying from 0.36±0.02 pCil-1 to 0.61±0.04 pCil-1 . The present results show that the radon concentrations in all water samples are below the allowed limit from International Commission on Radiological Protection agency which is 27 pCil-1 (ICRP 2009). In addition to the radon concentrations, the annual effective dose has been calculated. 2020
885 Zin Min Tun CHARACTERIZATION OF ACTIVATED CARBONS FROM COCONUT AND PEANUT SHELLS BIOMASS Biomass is organic material that comes from plants and animals, and it is a renewable source of energy. The coconut and peanut shells biochar were produced by heat decomposition of these biomasses. These biomasses were heated in a muffle furnace at 300 °C, 400 °C and 500 °C for 2 h respectively. The aim of this study was to use coconut and peanut shells in the preparation of activated carbon. The elemental compositions of these samples were analyzed by X-ray fluorescence (XRF). The surface morphology of these biomasses was determined by Scanning Electron Microscopy (SEM). Phase formation and structural properties of samples were characterized by X-ray Diffraction (XRD). Fourier Transform Infrared Spectroscopy (FTIR) was used to determine the chemical properties of the coconut and peanut shells biomass. In this research, the physicochemical characteristics of coconut and peanut shells biomass with activated carbons (ACs) were reported and discussed rapid deployment of renewable energy and energy efficiency and technological diversification of energy sources would result in significant energy security and economic benefits. 2020
886 Khin Khin Hlaing EFFECT OF MOLAR RATIO IN FORMATION OF BIPHASIC HYDROXYAPATITE/?-TRICALCIUM PHOSPHATE BIOCERAMICS Biphasic Hydroxyapatite/?-Tricalcium Phosphate (HAP/?-TCP) with three Ca : P molar ratios of 1.60 : 1, 1.57 : 1 and 1.54 : 1 were prepared by precipitation method. The filtrated white paste samples were analysed by Thermogravimetric and Differential Thermal Analysis (TG / DTA)) to determine the weight loss %, and to enable the qualification of endothermic energy changes. After heat-treatment at 1200?C for biphasic HAP /?-TCP, the powder samples were characterized by X-ray Diffraction (XRD) and the lattice parameters, volume of the unit cell, the crystallite sizes, and weight percent ratios were evaluated. The morphology of biphasic HAP/?-TCP powder was studied by using the Scanning Electron Microscopy (SEM). 2020
887 Swe Swe Win STUDY ON STRUCTURAL AND ELECTRICAL PROPERTIES OF MAGNESIUM FERRITE PREPARED BY CO-PRECIPITATION METHOD Ferrite materials with tunable electrical and magnetic properties are potential candidates for modern technological applications. The magnesium ferrites; MgFe2O4 having excellent combination of magnetic and dielectric properties can particularly be used for high-frequency applications. The synthesis conditions such as sintering and composition can manage the properties of these materials. On this background, the magnesium ferrite has been prepared by employing the co-precipitation method. The X-ray diffraction (XRD) patterns of prepared samples confirm the formation of a single phase cubic spinel structure. The crystallite size and lattice parameters of the sample have been calculated from XRD data. The FTIR study has been confirmed the presence of the functional group of O-H band and Fe-O band. Scanning Electron Microscopy (SEM) has been employed to observe the morphological features of MgFe2O4. Response of capacitance has been studied and the dielectric constants show the variation at relatively low frequency and both become stable at relatively higher frequency ranges. 2020
888 Aye Aye Myint ELEMENTAL ANALYSIS OF DIFFERENT ETHYLENE TREATMENTS ON MUSA Ethylene is a naturally occurring plant growth substance that has numerous effects on the growth, development and storage life of many fruits, vegetables. Harvested fruits and vegetables may be intentionally or unintentionally expose to biologically active levels of ethylene and both endogenous and exogenous sources of ethylene contribute to its biological activity. In this paper the concentration of elements contained in the musa samples were analyzed by using EDXRF method and discussed the effects of different ethylene treatments on the musa. 2020
889 Thida Pyone MEAN-MULTI THRESHOLDING BASED LIVER LESION DETECTION FROM CT SCAN IMAGES The objective of this research is the liver lesion regions detection and extraction for diagnostics. It involves four stages in this work such as pre-processing, extraction of liver, detection of liver, segmentation of liver and estimation of lesion regions. The outputs of lesion regions are analyzed from segmented livers. Lesion regions detection stage is used with mean-multi thresholding method and implemented with Matlab Programming language. Hundred data sets of CT abnormal liver images (256 ? 256 pixel, 2D liver slices) are tested and lesion regions are calculated from the criteria that the number of gray pixels which are greater than mean value of that block is greater than one-third time of total pixels. The comparative results in this research can be shown with mean value of lesion regions of benign liver CT images is in the range 149-167 and malignant liver CT images is in the range 125-135. 2020
890 Nang Htoo STUDY ON THE VARIOUS ANNEALING PROCESSES OF CUO-MNO2-ZNO ELECTROLYTE FOR LOW-TEMPERATURE SOLID OXIDE FUEL CELLS CuO-MnO2-ZnO (CMZO) mixed oxide was prepared by solid state reaction for the purpose of low temperature solid oxide fuel cell (LTSOFC) applications. Solid-oxide fuel cells (SOFCs) promise high efficiencies in a range of fuels. CuO–MnO2–ZnO mixed oxides with different Cu : Mn : Zn atomic ratios were obtained at 200oC, 300oC, 400oC and 500oC in 1 h. The change in the annealing temperature had a significant influence on the structural, surface morphology and optical properties. Powder X-ray diffraction and scanning electron microscopy with energy dispersive X-ray diffraction spectroscopy confirm the phase purity and the particle size of CMZO mixed oxide. Based on optical absorbance measurements, it was shown that CMZO with higher annealing temperature were characterized by a higher cut-off wavelength and lower optical band gap energy. 2020