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
871 San San Oo STRUCTURAL AND ELECTRICAL PROPERTIES OF Ba DOPED CaTiO3 THIN FILMS Calcium titanate and barium doped calcium titanate, Ca1-xBaxTiO3 (x = 0.1, 0.2, 0.3) thin films deposited onto silicon substrates were prepared by spin coating technique. The prepared undoped and Ba doped CaTiO3 thin films were studied by various characterization techniques aimed at understanding the structural and electrical properties of the samples. These films were characterized by a smooth surface with uniform, crack-free microstructure and densely packed, which is in agreement with the scanning electron microscopy (SEM) analysis. The effect of composition on the phase formation of these samples was investigated by recording X-ray diffraction patterns (XRD) and it was observed that the lattice parameter varied with increasing the dopant concentration of barium. The dielectric constants of all the films were determined by a capacitance-voltage measurement using a LCR meter in the frequencies range of (0.1 kHz to 100 kHz). 2020
872 Zar Zar Myint Aung DERIVATIONS AND VISUALIZATIONS OF COSMOLOGICAL FLUID EQUATIONS The fundamental notion of fluid cosmology has been briefly studied. In order to derive various physical and geometrical aspects of mass, momentum, density and equation of state, it is essentially needed to make use of the governing equation frequently used in astrophysics and cosmology. Then, it has been known clearly in this research. Some interesting and informative visualization of the results are done with the help of Mathematica Software. 2020
873 Htun Htun Oo THE MICROSCOPIC CALCULATION OF THREE-NUCLEON SYSTEM In this research, the Faddeev technique is applied to compute the ground state binding energy of three-nucleon system. Yukawa type malflit-Tjon potential is used for nucleon-nucleon interaction. The three-nucleon binding energy for s wave ( ) interaction is 7.538 MeV and for the binding energy becomes 7.550 MeV. 2020
874 Han Win Than EVOLUTION OF DYNAMICAL FIFTH DIMENSION IN BRANEWORLD COSMOLOGY Evolutions of the dynamical system in braneworld cosmology are of main issues on astrophysics and cosmology alike. One can think of extra dimension as important contributor of spacetimes evolution and gives the some interesting cosmological solutions. The solutions are in the form of travelling wave-like nature and visualizations of the solutions are given. 2020
875 Hnin Yu Wai FABRICATION AND CHARACTERIZATION OF STRONTIUM DOPED CALCIUM TITANATE THIN FILMS Strontium doped calcium titanate, Ca1-xSrxTiO3 (x = 0.1, 0.2, 0.3, 0.4) thin films deposited onto silicon substrates were prepared by sol-gel method and heated at 700°C for 1 hr. The sol-gel method offers numerous advantages such as good homogeneity of the powders and low processing temperature. Microstructural observation of the Ca1-xSrxTiO3 thin films was investigated from scanning electron microscopy (SEM) images and it was found that the grain sizes varied with increase in concentration of strontium. The structural identification with different dopant concentrations of the films examined using X-ray diffraction (XRD) analysis showed the complete crystallization in the perovskite structure. Capacitance-voltage (C-V) measurements were carried out by using a LCR meter for various frequencies (0.1 kHz to 100 kHz) and the values of dielectric constant for all the films were also determined. 2020
876 Shwe Sin Aung SYNTHESIS AND CHARACTERIZATION OF CALCIUM TITANATE (CaTiO3) POWDER FOR PHOTOVOLTAIC APPLICATION Calcium titanate (CaTiO3) powders with perovskite structure were synthesized by a co-precipitation method by using CaCO3, TiO2 and NaOH as the starting materials. The effect of calcinations temperature in phase formation, morphology and particle size distribution of proposed powders were examined. The dried gels were calcined at 500°C, 600°C and 700 °C respectively. The Structural analysis was calculated by using X-ray Diffraction Method (XRD). The functional groups were examined by using Fourier Transformed Infrared Spectrophotometer (FTIR). The surface morphology was examined by Scanning Electron Microscopy (SEM). The crystallite phase and the morphology of CaTiO3 were highly influence by the calcinations temperature. 2020
877 Khin Nyein Chan COMPARISON OF NEUTRON ELASTIC DIFFERENTIAL CROSSSECTIONS FOR 60Ni WITH INCIDENT ENERGIES 4.34 MeV, 4.92 MeV, 6.44 MeV AND 7.54 MeV The neutron elastic differential cross-sections for 60Ni with incident energies 4.34 MeV, 4.92 MeV, 6.44 MeV and 7.54 MeV are calculated by using SCAT2 computer code. Five optical model potential parameter sets for neutron reactions, Wilmore Hodgson, Bechetti Grenless, Ferer Rapaport, Bersillon Cindro and Madland are used to calculate the require elastic differential crosssections. Experimental elastic differential cross-section data are obtained from EXFOR experimental nuclear reaction data Library. Comparisons of calculated and experimental elastic differential cross-sections for different optical model potential parameter sets are made in each incident neutron energy. The best fit optical model potential parameter sets for the reactions in accordance with experimental results are also discussed. 2020
878 Thu Thu Thaw Myint ELEMENTAL ANALYSIS OF LAYERS OF ONION The individual layers of an onion have been analysed using EDX-7000 to study the elements contained in each layer and the change in concentrations of elements according to layer positions. The major elements found in each layer are potassium, sulphur and copper. 2020
879 Su Su Hlaing STUDY ON THE ANTIMICROBIAL PROPERTIES OF TiO2 NANOPARTICLESBY POUR PLATE CULTURE METHOD FOR APPLICATION IN WATER TREATMENT TiO2 nanoparticles were synthesized by the sol-gel combustion hybrid method using acetylene black as a fuel. The starting materials were: titanium isopropoxide, isopropanol and acetylene black which was obtained by the decomposition of acetylene and ammonium hydroxide. The obtained TiO2nanopowderswere examined by X-ray Diffraction (XRD). The sizes of the particles were estimated by using Scherrer’s equation. The as-prepared TiO2nanoparticles synthesized at 500.C were applied to study the antimicrobial behaviour. The activity of TiO2 nanoparticle against Escherichia coli (E.coli) using a serial dilution and pour plate culture method were investigated for application in water treatment. 2020
880 Ni Ni War STUDY ON SHAZAUNG-LET-PAT (Aloe vera Linn.) HYDROGEL BY RADIATION AND THEIR PHYSICAL PROPERTIES The films forming composed of polyvinyl alcohol (PVA) and Aloe vera(AV) gel were prepared and characterized by different ratios of PVA/AV hydrogel films 1:1, 1:2 and 1:3 variations in the Aloe vera contentsby using the solvent casting technique. The physical parameters like the effect of the actual dose rate, measured dose rate and specific heat capacity of the Aloe vera leaf, natural gel and hydrogel were analyzed and compared with geometrical 0modificationby gamma radiation of a 137Cs source at room temperature. The specific heat capacity of Aloevera composite hydrogel was found to be 4.33 kJ/kgK, which was higher than that of liquid water4.20 kJ/kgK. The standard value of the total mass absorption coefficient (µm) with weighing factors of constituted elements in hydrogelby using Energy Dispersive X-Ray Fluorescence (EDXRF) analysis was calculated to be 0.069 cm2 /g. From the experimental results showed that the comparative analysis with the mass absorption coefficient (µm)value of film 3, used as absorber was obtained to be 0.065 cm2 /gby using Sodium Iodide Scintillation Detector [NaI(Tl)] STX-x64software ST 360 counter and approximately equal to the standard value.After studying the microstructure characterizations of all the composite films were performed by Scanning Electron Microscopy (SEM) analysis. 2020