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Analysis of Bulk Concentration on Double-Layer Structure for Electrochemical Capacitors
Khaing Nee Nee Khaing,Tin Tin Hla 한국재료학회 2022 한국재료학회지 Vol.32 No.7
Double-layer capacitors (DLCs) are developed with high surface electrodes to achieve a high capacitance value. In the present work, the initial bulk concentration of 1 mol/m3 and 3 mol /m3 are selected to show the consequential effects on the performance of a double-layer capacitor. A 1D model of COMSOL Multiphysics has been developed to analyze the electric field and potential in cell voltage, the electric displacement field and polarization induced by the field, and energy density in a double-layer structure. The electrostatics and the electric circuit modes in COMSOL are used to simulate the electrochemical processes in the double-layer structure. The analytical analysis of a double-layer capacitor with different initial bulk concentrations is investigated by using Poisson-Nernst-Plank equations. From the simulation results, the differential capacitance changes as a function of compact layer thickness and initial bulk concentration. The energy density varies with the differential capacitance and voltage window. The values of energy density are dominated by the interaction of ions in the solution and electrode surface.
한국어와 미얀마어의 공간형용사 ‘높다’에 대한 의미 대응연구
카잉카잉툰 ( Khaing Khaing Htun ) 한국외국어대학교 외국어교육연구소 2022 외국어교육연구 Vol.36 No.4
This paper examines the original and extended meanings of spatial adjectives ‘to be high’ in Korean and Myanmar Languages correspondingly. It presents the connection between these two adjectives including their characteristics (typical features), distinctness and usage. This corresponding study highlights the similarities and differences between the uses of spatial adjectives in these languages. As a result of comparing the basic meanings of Korean ‘높다’(to be high) and Myanmar ‘□’[mjiṉ](high) are almost the same, but there is a difference in expression of human height. In Myanmar, it is used as ‘□’[mjiṉ](high) and ‘□’[ja](long) for people's height. But in Korean, it does not match because ‘크다’(big) is used for people's height. According to the results of the corresponding study of the extended meaning of ‘높다’(to be high) in Korean and ‘□’[mjiṉ](high) in Myanmar, 5 correspondences, 6 non-correspondences, and 1 correspondence/ non-correspondence were derived out of 12. For this study, the primary data are collected from Lexicons, Korean Grammar, Myanmar Grammar, dictionaries, novels and articles. The principle of spatial adjectives are described and the similarities and differences of the two languages are also analyzed. ‘to be high’ and ‘□’[mjiṉ](high) are studied intensely in this study. It observes that the Korean ‘높다’(to be high)is not used to express a person’s height, but in Myanmar language ‘□’[mjiṉ](high) indicates a person’s height which convey the same meaning of ‘to be high’. The result shows that there are many similarities even while the different types of change from extension to abstractness. This study will help the students who learn Korean and Myanmar languages to understand the adjectives ‘to be high’ easily. It will also contribute to the study of the Korean spatial adjectives.
TINMOE KHAING,심재경,이경열 한국곤충학회 2015 Entomological Research Vol.45 No.6
Four species of the genus Panonychus are identified in Korea including two previously known species P. citri (McGregor) and P. ulmi (Koch) and two newly identified species P. mori Yokoyama and P. caglei Mellot. Morphological diagnostics were observed among the four species in the color of dorsal tubercles and in the shape of male aedeagus. The dorsal tubercles of P. citri, P. ulmi, P. mori and P. caglei are red, white, whitish red and light red, respectively. The aedeagi of male adults are diagnostic in sigmoid‐shaped at the distal end and its shape and length was different among four species. Molecular comparison of the internal transcribed spacer 2 (ITS2) sequence of nuclear DNA and cytochrome‐c oxidase subunit I (COI) nucleotide sequence of mitochondrial DNA among the four species showed divergences 8–12% and 9–12%, respectively. Molecular analysis of the ITS2 and COI sequences revealed their divergences were slightly different among four species. In addition, species‐specific primer sets were designed at the base on ITS2 sequences to precisely diagnose these four species at the molecular level.
TINMOE KHAING,심재경,이경열 한국곤충학회 2014 Entomological Research Vol.44 No.6
Molecular diagnosis is highly valuable for the species identification of microscopic mites. Here, we collected some economically important mites of the superfamily Acaroidea from various stored products in Korea. Those nucleotide sequences of ribosomal second internal transcribed spacer (ITS2) and the mitochondrial cytochrome oxidase subunit I (COI) regions were determined by PCR using universial primers. In nucleotide sequence comparison at GenBank database, seven species including Rhizoglyphus robini, R. echinopus, Sancassania sp. Acarus siro, Tyrophagus putrescentiae, T. similis in Acaridae and Suidasia medanensis in Suidasiidae were identified. Particularly, COI sequences of R. robini, R. echinopus, Sancassania sp. and T. similis were firstly determined. Our results suggest that the phylogenetic relationships inferred from the ITS2 region, rather than COI region, were similar to those derived based on their morphological classification. Our study provides molecular information for the identification and phylogenetic relationship of acaroid mites in Korea.
Optimization of efficient protocorm-like body (PLB) formation of Phalaenopsis and Dendrobium hybrids
Soe, Khaing Wah,Myint, Khin Thida,Naing, Aung Htay,Kim, Chang Kil Institute of Agricultural Science and Technology 2014 慶北大農學誌 Vol.32 No.4
Optimization of the protocorm-like body (PLB) formation of Phalaenopsis and Dendrobium hybrids was performed by determining the effects of plant growth regulators (PGRs) and different parts and division sizes of the PLB. For both genera, the base part was the best for the proliferation of PLBs, yielding the highest number of PLBs on a PGR-free medium for Phalaenopsis and medium containing $0.1{\mu}M$ NAA and $10.0{\mu}M$ BAP for Dendrobium. As regards the division size, four-division sections resulted in a higher PLB formation efficiency for Phalaenopsis, while two-division sections produced a higher PLB formation efficiency for Dendrobium. It is expected that these findings will be applicable to efficient PLB formation of other Phalaenopsis and Dendrobium orchids.
Electrical transport properties of GaSb: Te films grown by Molecular Beam Epitaxy
Aung Khaing Nyi,김시영(Si Young Kim),이웅(Woong Lee),오승준(Seungiun Oh),정미나(Mina Jung),박승환(Seunghwan Park),오동철(Dong-cheol Oh),이상태(Sang Tae Lee),조영래(Young Rae Cho),장지호(Ji Ho Chang),이홍찬(Hng Chan Lee) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
The electrical properties of GaSb films were investigated. Electrical properties were measured by Hall measurements with Van der Pauw configuration and performed in the temperature range from 10 to 300k. Te doped GaSb layers (wit/without ZnTe buffer) were grown by molecular beam epitaxy. The experimental results are compared to the theory, Brooks-Herring scattering theory, based on the two-layer Hall effect model. We considered the four major scattering mechanisms effects. The role of ZnTe buffer to the electrical properties is discussed.
분자선 에피탁시법으로 성장한 Te 도핑된 GaSb 박막의 전기적 특성
Aung Khaing Nyi,김시영(Si Young Kim),이웅(Woong Lee),오승준(Seungjun Oh),정미나(Mina Jung),박승환(Seunghwan Park),오동철(Dong-cheol Oh),이상태(Sang Tae Lee),조영래(Young Rae Cho),장지호(Ji Ho Chang),이홍찬(Hong Chan Lee) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
The electrical properties of GaSb films were investigated. Electrical properties were measured by Hal1 measurements with Van der Pauw configuration and performed in the temperature range from 10 to 300K. Te doped GaSb layers (with/without ZnTe buffer) were grown by molecular beam epitaxy. The experimental results are compared to the theory, Brooks-Herring scattering theory, based on the two-layer Hal1 effect model. We considered the four major scattering mechanisms effects. The role of ZnTe buffer to the electrical properties is discussed.
Optimization of efficient protocorm-like body (PLB) formation of Phalaenopsis and Dendrobium hybrids
Soe, Khaing Wah,Myint, Khin Thida,Naing, Aung Htay,Kim, Chang Kil 경북대학교 농업생명과학대학 2014 Current Research on Agriculture and Life Sciences Vol.32 No.4
Optimization of the protocorm-like body (PLB) formation of Phalaenopsis and Dendrobium hybrids was performed by determining the effects of plant growth regulators (PGRs) and different parts and division sizes of the PLB. For both genera, the base part was the best for the proliferation of PLBs, yielding the highest number of PLBs on a PGR-free medium for Phalaenopsis and medium containing 0.1μM NAA and 10.0μM BAP for Dendrobium. As regards the division size, four-division sections resulted in a higher PLB formation efficiency for Phalaenopsis, while two-division sections produced a higher PLB formation efficiency for Dendrobium. It is expected that these findings will be applicable to efficient PLB formation of other Phalaenopsis and Dendrobium orchids.
May Thinn Khaing,Hyo Jin Jung,Tae-Ho Han 한국화훼학회 2018 화훼연구 Vol.26 No.3
Micropropagation studies of two Hydrangea. macrophylla cultivars, ‘Blaumeise’ and ‘Vanilla Sky’, were performed by tissue culture. The results showed that supplementing B5 medium with different concentrations of 6-Benzylaminopurine (BA) (0.0, 0.5, 1.0, 1.5, and 2.0 mgL-1) significantly increased the number of shoots and leaves per explant compared with the control in both cultivars. In ‘Blaumeise’, 1.0 mgL-1 of BA was the concentration that achieved the highest number of shoots and leaves, i.e., 12.5 and 93.25, respectively. In ‘Vanilla Sky’ 1.5 mgL-1 of BA resulted in the highest numbers of shoots (4.25) and leaves (29). The longest shoot in both ‘Blaumeise’ (2.10 cm) and ‘Vanilla Sky’ (1.18 cm) was obtained at 0.0 mg·L-1 of BA. The highest number of roots in both ‘Blaumeise’ (11) and ‘Vanilla Sky’ (6.5) were obtained with indole-3-butyric acid (IBA) 1.0 mgL-1 of IBA.