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스페이서댐퍼 클램프의 선로방향 관절부와 서브스판진동과의 관계 실험적 고찰
이형권(Hyung-Kwon Lee) 대한전기학회 2009 전기학회논문지 P Vol.58 No.4
In order to protect conductors from oscillations or vibrations due to winds, spacer dampers are installed on overhead transmission lines. Generally the spacer damper clamp can move slightly according to oscillation directions, namely in longitudinal, vertical & horizontal directions. This is for reducing fatigue phenomena of the conductor. But the high longitudinal- displacement of the clamp raises a doubt for its necessity. Then this paper carried out oscillation tests by using 4 bundle test lines, to know the relation between longitudinal displacement and oscillation. and suggests design necessity of the longitudinal articulation part for spacer damper clamps.
4도체 가공선로에서 복도체 스페이서를 이용한 진동저감 대책 연구
이형권(Hyung-Kwon Lee),한형주(Hyeong-Ju Han) 대한전기학회 2009 전기학회논문지 P Vol.58 No.3
The oscillation is very dangerous in bundled transmission lines, besides 4 bundle transmission lines are very weak for subspan oscillations. In some cases, subspan oscillations are continuously occurred in the same subspan. In order to develop the control method of the above subspan oscillation, this paper suggests a method of applying twin spacers to the subspans. We have carried out some tests to analyze the oscillation phenomena after installing twin spacers on 4 bundle overhead lines, and we got a good effect for controling subspan oscillations by installing twin spacers
흉부 X선을 통한 우폐의 종횡비와 체질, 체성분분석 및 변증설문검사와의 상관성에 관한 연구
신선미,이형권,고흥,Sin, Sun-Mi,Lee, Hyung-Kwon,Ko, Heung 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.2
Objective : The purpose of this study was to evaluate the Sasang constitution and body composition of the two groups devided by chest PA. Method : This study was carried out on 60 students of Semyung University. The students were selected according to the aspect ratio of rt. lung from chest PA. They were divided into two groups(length group and width group) and administered QSCCII & body composition analysis. Result : The 30 students of the length group were classified as Soumin(15), Soyangin(9), and Taeumin(6). The 30 students of the width group were classified as Taeumin(20), Soyangin(9), and Soumin(1). In the width group, weight, total body water, amount of total body fat, muscles, viceral fat area(VFA), waist hip ratio(WHR), were significantly higher than in the length group. Conclusion : There were significant relationships between the shape of lung and constitution and body composition. These findings indicate that actual organ condition could be expressed in body shape.
고연소도 사용후 핵연료의 가열산화와 고온가열을 통한 미세조직 변화고찰
김대호,방제건,양용식,송근우,이형권,권형문,Kim Dae Ho,Bang Jae Geun,Yang Yong Sik,Song Keun Woo,Lee Hyung Kwon,Kwon Hyung Moon 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.4
The morphology of the high burnup $UO_2$ spent fuel, which was oxidized and annealed in a PIA (Post Irradiation Annealing) apparatus, has been observed. The high burnup fuel irradiated in Ulchin Unit 2, average rod burnup 57,000 MWd/tU, was transported to the KAERI's PIEF. The test specimen was used with about 200 mg of the spent $UO_2$ fuel fragment of the local burnup 65,000 MWd/tU. This specimen was annealed at $1400^{\circ}C$ for 4hrs after the oxidation for 3hrs to grain boundary using the PIA apparatus in a hot-cell. In order to oxidize the grain boundary, the oxidation temperature increased up to $500^{\circ}C$ and held for 3hrs in the mixed gas (60 ml He and 100 ml STD-air) atmosphere. The amount of 85Kr during the whole test process was measured to know the fission gas release behavior using the online system of a beta counter and a gamma counter. The detailed micro-structure was observed by a SEM to confirm the change of the fuel morphology after this test. As the annealing temperature increased, the fission products were observed to move to the grain surface and grain boundary of the $UO_2$ matrix. This specimen was re-structured through the reduction process, and the grain sizes were distributed from 5 to $10\;{\mu}m$.