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
861 Amy Than STURCTURE IDENTIFICATIOIN AND OPTICAL PROPERTIES OF SPIN COATED Cu DOPED CdO THIN FILMS Pure CdO and Cu (1 mol%, 2 mol%, 3 mol% & 4 mol%) doped CdO thin films on glass substrate were successfully fabricated by using the spin coating technique. The samples were annealed at 500?C for 1 hour. The films structures were studied by X-ray diffraction (XRD). From the XRD analysis, lattice parameters, unit cell volume and crystallite size of the samples are calculated. Also XRD studies reveal that pure CdO and Cu doped CdO thin films are showed cubic structure with maximum peak (111) planes. Furthermore, the XRD data, dislocation density and microstrain are also evaluated. From the optical properties, absorption coefficient and the band gap energy of the samples are calculated. 2020
862 Lwin Mg MICROBIAL ELECTRIC ENERGY HARVESTING FROM THE LIVING PLANT MICROBIAL FUEL CELL (P-MFC) Living Plant Microbial Fuel Cell (P-MFC) is the kind of bio volt-photo galvanic cell which converts solar energy into green electricity. The plant synthesized Rhizo-deposit, mostly in the form of carbohydrate, at the sphere of the root through the photo-synthesis process. The microbes of the Rhizo sphere decompose the Rhizo-deposit and converts into electric energy via the Microbial Fuel Cell. The carbon blocks were used as the electrode of the microbial fuel cell. Hsin ngou Grass (Eleusine indica) was used to examine the performance of the plant microbial fuel cell and achieved the maximum electric power is 13.86mWm-2 , open circuit voltage is 0.35V and short circuit current density is 162.5mAm-2 as prepared cell. The open circuit voltage is fluctuated with the life time of the microbial fuel cell and the maximum open circuit voltage, 0.8V was observed at the 10th day of the fabrication of the microbial fuel cell. 2020
863 Ni Ni Tin EFFECT OF SAMARIUM SUBSTITUTION ON THE TRUCTURAL AND DIELECTRIC PROPERTIES OF ZINC FERRITE Samarium substituted Zinc ferrites, ZnFe2-2xSm2xO4 (x= 0.0000, 0.0125, 0.0250, 0.0375, 0.0500) have been synthesized by Conventional Ceramic Method. The structural properties have been investigated by the X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and dielectric measurements. The XRD analysis has confirmed the single cubic spinel phase of ZnFe2-2xSm2xO4with various compositions. The surface morphology has been observed from SEM micrographs. The average grain size has become smaller due to the substitution of Sm ion with larger ionic radius compared to that of Fe ion. FTIR analysis indicates the specific molecular vibrations at the spinel lattice in the wavelength range of 400 - 4000cm-1 . The dielectric constant was measured in the frequency range of 1kHz to 1MHz. 2020
864 Chan Myae Hlaing INVESTIGATION ON PROTON AND LEPTON CONCENTRATION IN SUPERNOVA EXPLOSIONS SIMULATIONS This research describes the effective chiral mean field model to construct the relativistic equation of state (EOS) of nuclear matter at finite temperature and density with various proton fractions and lepton fractions for the use in the supernova simulations. This model is based on chiral symmetry and we have adopted the RMF theory with the non-linear terms, which was a success in describing the properties of both stable and unstable nuclei. In supernovae, the EOS determines the non-linear the dynamics of the collapse and the outgoing shock, and determines whether the remnant ends up as a neutron star or black hole. The various properties of supernova matter are investigated within the effective chiral mean field model. The outcome is demonstrated at zero entropy (neglecting thermal effect), the various proton fractions ranging from (Yp=0.1~0.5) and various lepton fractions ranging from (Ye=0.13~0.5) to be used for the simulations. 2020
865 Aye Aye Soe INVESTIGATION OF RADON CONCENTRATION AND ANNUAL EFFECTIVE DOSE OF FIVE DIFFERENT TILE SAMPLES Radon is a colourless and odourless inert gas and its isotopes can be found in the uranium and thorium decay sequences occurring in the nature. An alpha particle is emitted during its decay. Its progeny elements are formed as a result of series of decays which are also radioactive. A study of radon concentration has been carried out in the five different tile samples, using LR-II5 type II Solid State Nuclear Track Detectors (SSNTDs). According to the present measurement, it was found that, the value of radon ranges from 219.05 ± 11.90 Bqm-3 to 441.90 ± 32.86 Bqm-3 with an average value 337.86 ± 23.24Bqm-3 . The annual effective dose ranges from 3.76 ± 0.20 mSvyr-1 to 7.6 ± 0.57 mSvyr-1 with an average value of 5.81 ± 0.40 mSvyr-1 . 2020
866 Lay Thi TarOo DETERMINATION OF RADIOLOGICAL HAZARDS WITH THE RADIOACTIVITY LEVELS OF SOIL IN THE INDUSTRIAL AREA, MANDALAY The activities of naturally occurring radionuclides in five soil samples from the industrial area of Mandalay were calculated from experimental results which were obtained by using a NaI(Tl) detector. From these results, the percentage contribution of the radioactivity in the soil samples was shown with the greater percentage K-40 (81.08%), Ra-226 (10.29%) and Th-232 (8.63%). The calculated amounts of radionuclides were compared with their maximum admissible limits of UNSCEAR (2000). In order to assess the radiological hazards of the radioactivity in soil, radium equivalent activity, absorbed dose rate, external and internal hazard indices were calculated and the computed hazards were shown with average values of 228.33 Bq/kg, 106.26 nGy/h, 0.62 and 0.84 respectively. The present result was shown that the mean external and internal hazard indices value was less than 1.0, as recommended for safety globally (EC, 1999). 2020
867 Khin Maung Htwe ASSESSMENT OF HEAVY METALS CONTAMINATION IN SOILS AND HEALTH RISK IN RICE Environmental pollution with excess content of heavy metals can lead to the possible contamination of the rice and associated soil. Rice is mainly food and nutrient for people in Myanmar. Eating rice is the most important route for accumulation most chemical elements. The purposes of this study were to assess heavy metal contamination and the potential risk in some soil and rice samples by using EDXRF techniques. Eight rice samples and associated eight soils are collected from Kyaukse, Sinkaing, Amarapura, Patheingyi and Madaya. The mean levels of selected metals concentrations in soil samples and rice samples were found to be less than safe limit but Hg’s concentration values for soil and rice are 2.85 mg/kg and 1.25 mg/kg respectively. The values of Hg are above the safe limit values 1.3 mg/kg for soil and 0.03 mg/kg for rice by USEPA (1997), FAO/WHO (1992). The mean transfer values of selected metals are less than one but Hg’s transfer factor value is the highest value of all the elements. EDIM value 0.007 (mg/kg day) of Pb was found higher than the permissible value 0.001 (mg/kg day) but the rest metals of EDIM values were lower. The potential health risk has been evaluated for the local adults. The risk assessment results of 2017 showed that health risk associated with these elements through consumption of rice were not present. However, regular monitoring of accumulation of heavy metals in rice and soil has been conducted by using more precise and modern techniques. 2020
868 Myint Myint Maw ELEMENTAL ANALYSIS OF PARTS OF CHILI Different parts of raw green and ripe red chilies have been analysed using EDX-7000 to study the elements contained in each parts and the change in concentrations of elements due to varying parts, such as seed, skin or stalk. The major elements found in each part are potassium, sulphur, copper and iron. 2020
869 Wint Shwe War Hlaing CONSTRUCTION AND DATA ACQUISITION OF UV RADIATION METER The ML8511 UV sensor detects 280 nm – 390 nm light, this wavelength is categorized as part of the UVB-burning rays spectrum and most of the UVA-tanning rays spectrum. The sensor ML8511 has a UV photodiode and internal amplifier which will converts photo current to voltage output depending on the UV light intensity. UV intensity is directly proportional to output voltage so that the program is written according to their relation. The UV intensity in mW/cm^2 is displayed on LCD which is processed by Arduino microcontroller. At the same time, data are sent to the Microsoft (MS) excel spreadsheet via parallex data acquisition (PLX-DAQ) software. Data accompanying with current date and time are uploaded directly from Arduino to MS excel spreadsheet. 2020
870 May Kalayar Kyaing PREPARATION AND CAPACITANCE PROPERTIES OF BARIUM, CALCIUM AND TIN DOPED STRONTIUM TITANATE THIN FILMS Sol-gel method was used in this study to prepare barium, calcium and tin doped strontium titanate thin films deposited onto silicon substrates by spin-coating technique. The effects of the dopant materials on the structural and capacitance properties of the films were examined by various characterization procedures. Morphological analysis of the samples was performed using scanning electron microscopy and all the films were found to be well grown and homogeneous structure. The structural modification was investigated by X-ray diffraction and the crystalline phases of the films were observed to be cubic perovskite structure. Measurements of capacitance-voltage characteristics were carried out by using LCR meter in the frequency range of 1 kHz to 100 kHz with the various applied voltages. From Mott-Schottky analysis, built in potential “Vbi”, effective dopant concentration “ND” and depletion layer width “W” of the films were also evaluated. 2020