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유엔 OPSP의 UNIFIL 방문을 통해 본 평화활동 주요정책과 발전방안
김세하 ( Seha Kim ) 국방대학교 PKO센터 2023 PKO저널 Vol.26 No.-
The purpose of this study is to enhance readers' understanding of the OPSP team inspection conducted by the United Nations for each mission. At the same time, the focus of the OPSP team’s inspection is to confirm the recent major U.N. policies and provide implications for the deployment policy to the Republic of Korea. OPSP is a DPO subordinate department that directly assists USG (Under Secretary General), checks whether UN policies are being implemented well in the field mission, identifies and reports systematic problems, and seeks ways to develop them. From March 2022 to February 2023, I was deployed as a planning officer at the UNIFIL HQ and had the opportunity to accompany the OPSP team’ visit for about 10 days to inspect UNIFIL for participant observation. Observation results. As a result of the Observation, The OPSP team mainly identified the following. First, it is about the Protection of Civilians (POC) mandate. Second, it is a procedure for Casualty Evacuation (CASEVAC). Third, it is the increase of Female Peacekeepers and the creation of working conditions. Fourth, it is related to command control and work efficiency between the UNIFIL Liaison Group (LB) and the UNTSO Observer Group (OGL). Fifth, it is a matter of denial of freedom of movement during operational activities. The following implications were derived in consideration of the inspection focus. First, it is necessary to strengthen training on how to act at the tactical level to implement UN policy. There is a large gap between the U.N. policy and the degree of understanding of accepting the policy in TCCs. Second, we need to increase the women's peacekeepers. It has to be broken away from the existing staff-centered organization for them and form a female special forces team or infantry non-commissioned officers teams to dramatically enhance the organization rate while performing active peacekeeping missions such as patrols.
리튬 디실리케이트 크라운의 제작방법이 적합도에 미치는 영향
최수연(Su-Yeon Choi),김세하(Seha Kim),지정희(Jeong-Hui Ji),이민호(Min-Ho Lee),배태성(Tae-Sung Bae) 대한치과재료학회 2020 대한치과재료학회지 Vol.47 No.3
The purpose of this study was to evaluate the influence of fabrication methods of lithium disilicate reinforced glass-ceramic crown on marginal and internal fit. Lithium disilicate reinforced glass-ceramic crowns were fabricated using ingots for heat press forming and blocks for CAD/CAM milling manufactured by Hass and Ivoclar/Vivadent. Dentiform of maxillary central incisor was prepared with a 6°taper and 1 mm deep chamfer margin and duplicated with silicone. Then the polyurethane resin was poured at silicone mold to produce working model. Marginal and internal fit were measured by the silicone replica technique. Each silicon replica was cut into labio-lingual and mesio-distal sections and the thickness of the light body silicon was measured. Fourteen reference points were determined and measured using a microscope. As a result of calculating and comparing the average value of 14 points in all groups, the measured value was within 120 μm, the clinically acceptable range suggested by previous literatures. In all groups, the marginal fit was smaller than the internal fit. At the margin area, significant differences were identified only between the ECM group and the EPM group, and there was no statistically significant difference between the remaining groups. At the deep chamfer area, the ECM and ABM group produced by the CAD system had excellent compatibility. In the axial wall and incisal area, ECM was superior to both EPC and EPM. Also, both ABM and APC groups were statistically significantly superior than APM.
열가압성형 지르코니아 코어의 굴곡강도에 대한 매몰재의 영향
김태연(Tae-Yeon Kim),김세하(Seha Kim),지정희(Jeong-Hui Ji),임병구(Byoung gu Lim),오성근(Sung Geun Oh),신재우(Jaewoo Shin),이정환(Junghwan Lee),이민호(Min-Ho Lee),배태성(Tae-Sung Bae) 대한치과재료학회 2020 대한치과재료학회지 Vol.47 No.4
The purpose of this study was to evaluate the effect of the reaction between investment material and zirconia on the strength of zirconia in the application of heat-pressing method. Sixty specimens were cut (24 mm×4 mm×0.5 mm) into plates from Zirtooth™ Multi O-9814 block (∅98×14T, HASS, Gangwondo, Korea) and sintered at 1450℃. Specimens were divided into 6 subgroups according to the depending on the investement material; (a) UN group (Control), (b) PH group (Prime vest HS), (c) CP group (Calibra-press), (d) BV group (BC-Vest), (e) MH group (Microstar-HS), (f) F1 group (Formula 1). Five investment materials were buried according to the procedure recommended by the manufacturer and left at room temperature for 30 minutes. The investment mold was dried and maintained at an elevated temperature of 850℃ for 50 minutes. Then, Amber Lisi-POZ LT (HASS) was placed in a thermoformed electric furnace (Programat EP3000/G2, Ivoclar Vivadent, Schaan, Liechtenstein) together with the mold, heated to 915℃ at an elevation temperature of 45℃/min, and moored for 15 minutes. The specimens were loaded to fracture in a universal testing machine and the fracture surface was examined by a field-emission scanning electron microscopy (FE-SEM). The surface of the zirconia specimen with the investment material was analyzed by energy dispersive X-ray spectroscopy (EDS). The 3-point flexural strength test showed the highest value (1265.5 MPa) in the UN group and the lowest value (756.1 MPa) in the F1 group. As a result of EDS analysis, the largest amount of Si was detected in the F1 group, and the most interfacial changes occurred as a result of FE-SEM analysis. It was concluded that when the zirconia is buried with the investment material and the heat press molding is performed, the state of the interface is changed due to the investment material at the bonding interface while the strength is lowered.
E. coli 과량발현을 통한 B형 간염 바이러스 preS1 유도체의 안정한 동위원소 N의 치환
박병관,김세하,한규훈,김선영,홍요정,이시형,한동설,김순종,박진구 木浦大學校基礎科學硏究所 1997 基礎科學硏究誌 Vol.15 No.-
We have used molecular biology technique to label the side chains and backbone of HBV preS1(1-56) with stable isotope (??) during E. coli over-expression and purified the protein to near homogeneity. The expression level of ?? labelled preS1(1-56) seems to be ∼15% of the total protein. to characterize the secondary structure of the labelled protein, circular dichroism was used. In different buffer conditions including pH 3.3 and pH 7.4 the protein seems to be devoid of any stable secondary structure probably suggesting that the N-terminal portion (preS1(1-56)) of HBV preS1 might be unstructured before binding to its target cells.