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카본우븐패브릭 기반 2D 구조의 Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> 배터리음극소재
남상희 ( Sanghee Nam ),시마엄라오 ( Sima Umrao ),오세웅 ( Saewoong Oh ),오일권 ( Il-kwon Oh ) 한국복합재료학회 2019 Composites research Vol.32 No.5
Two dimensional transition metal carbides and/or nitrides, known as MXenes, are a promising electrode material in energy storage due to their excellent electrical conductivity, outstanding electrochemical performance, and abundant functional groups on the surface. Use of Ti<sub>3</sub>C<sub>2</sub> as electrode material has significantly enhanced electrochemical performance by providing more chemically active interfaces, short ion-diffusion lengths, and improved charge transport kinetics. Here, we reports the efficient method to synthesize Ti<sub>3</sub>C<sub>2</sub> from MAX phase, and opens new avenues for developing MXene based electrode materials for Lithium-Ion batteries.
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공직문화 혁신 방안이 MZ세대 공무원의 조직문화 인식에 미치는 영향: 공직문화 혁신 순환모형의 인사제도지원역량, 조직관리역량, 개인역량을 중심으로
오상희(Sanghee Oh),오정록(Jeong Rok Oh) 한국공공사회학회 2025 공공사회연구 Vol.15 No.3
This study examines the factors influencing perceptions of organizational culture among 4,010 public servants from the MZ generation (born after 1981), based on data from the 2023 Public Service Life Survey. The analysis revealed that promotion, welfare, organizational performance, organizational goals, work performance, and leadership had significant positive effects on organizational culture perception. In contrast, recruitment, decision-making, change management, communication, performance management, and training were not statistically significant, while compensation had a significant negative effect. These findings underscore the importance of prioritizing organizational culture factors from the perspective of the MZ generation and suggest the need for policy approaches that reflect generational characteristics. Notably, traditionally emphasized elements such as compensation and communication may have less direct impact on this cohort
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Oh, Keunhee,Kim, Sanghee,Park, Se-Ho,Gu, Hua,Roopenian, Derry,Chung, Doo Hyun,Kim, Yon Su,Lee, Dong-Sup Williams Wilkins 2005 JOURNAL OF IMMUNOLOGY Vol.174 No.4
<P>The role of NKT cells during immune responses is diverse, ranging from antiviral and antitumor activity to the regulation of autoimmune diseases; however, the regulatory function of CD1d-dependent NKT cells in rejection responses against allogeneic graft is uncertain. In this study, we demonstrated the direct regulatory effects of CD1d-dependent NKT cells using an allogeneic skin transplantation model. H-Y-mismatched skin graft survival was shortened in CD1d-/- recipients compared with wild-type recipients. Adoptive transfer of syngeneic NKT cells via splenocytes or hepatic mononuclear cells into CD1d-/- recipients restored graft survival times to those of wild-type recipients. alpha-Galactosylceramide, a specific activator of NKT cells, further prolonged graft survival. Although CD1d-dependent NKT cells did not extend skin graft survival in either major or complete minor histocompatibility-mismatched models, these cells affected graft survival in minor Ag mismatch models according to the magnitude of the antigenic difference. The afferent arm of NKT cell activation during transplantation required CD1d molecules expressed on host APCs and the migration of CD1d-dependent NKT cells into grafts. Moreover, the regulatory effects of CD1d-dependent NKT cells against alloantigen were primarily IL-10 dependent. Taken together, we concluded that CD1d-dependent NKT cells may directly affect the outcome of allogeneic skin graft through an IL-10-dependent regulatory mechanism.</P>
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朴祥希,吳明淑 弘益大學校 科學技術硏究所 2004 科學技術硏究論文集 Vol.15 No.-
As the number of coal fired power plant in the domestic power industry increases, amount of fly ash produced from coal power plant is also increasing. Sintered fly ash aggregates were investigated as a area of reutilization of this fly ash. This study was done to investigate the combustion of carbon during the production of sintered fly ash aggregates. Fly ash powders and pellets were used in the experiments. For combustion experiments, the apparatus equipped with an O₂flow/concentration controller, a temperature controller and a recorder was set up. The rate of weight loss and the temperature were measured under various O₂ partial pressures and heating rates. The combustion experiments using fly ash powders showed that the combustion rate was very low at low temperatures, and then rapidly increased once a certain temperature was reached. Both the reaction initiation temperature and the reaction temperature range became lower at higher O₂ partial pressure, and lower heating rates. The combustion rate of the pellets were lower than that of the powders, showing the mass and heat transfer resistances. The effects of O₂ partial pressure and the heating rate on the pellet weight loss were similar to that of the powders.
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