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무인선박을 이용한 저수심 간출암 지역의 수심측량 적용성 연구
현종훈(Hyun, Jong Hoon),황석훈(Hwang, Seog Hoon),이동하(Lee, Dong Ha),최경환(Choi, Kyung Hwan) 대한공간정보학회 2024 대한공간정보학회지 Vol.32 No.2
한반도의 해수면 상승 속도가 가속화되면서 기후 위기 우려가 증가하고 있다. 이로 인해 조석과 파동 변화, 해안침식, 연안 해저 지형 및 퇴적상 변화 등의 영향이 더 커지고 있다. 이러한 문제를 해결하기 위해 침식 대책공 수요가 늘어나고 있으며, 특히 연안 저수심 노출암, 간출암, 그리고 쇄파대의 해저 공간정보에 대한 양질의 데이터 수집이 급하게 필요한 시점이다. 기존의 수심측량 방법의 경제적, 기술적 한계를 보완하기 위해 본 연구에서는 Autonomous Surface Vehicles(ASV)를 활용하여 저수심 간출암 지역의 수심 측정을 수행했다. 이를 통해 연구 대상지역의 평균 수심이 2.0m 이하인 간출암 지역에서 국제수로기구(IHO) 1a 등급을 요구하는 수심 측정 성과를 달성할 수 있었다. 이러한 결과는 ASV을 활용한 수심 측정 방법이 연안 지역의 해양 환경 모니터링 및 관리에 유용하게 활용될 수 있음을 입증하였다. As sea levels on the Korean Peninsula continue to rise, concerns about the climate crisis are intensifying. This rise is leading to more noticeable effects, including changes in tidal patterns, wave dynamics, coastal erosion, and shifts in coastal submarine topography and sedimentation. To combat these issues, there is an urgent need for erosion control measures and high-quality data collection on submarine features such as coastal ridges, shoals, and reefs. Overcoming the economic and technological constraints of traditional depth measurement techniques, this study employed Autonomous Surface Vehicles (ASVs) to perform depth measurements in areas with submerged rocks and shallow depths. The results met the IHO 1a standard, achieving accurate depth measurements in areas with an average depth of less than 2.0 meters. These findings demonstrate that ASVs can be effectively used for marine environmental monitoring and management in coastal regions.
전이성 간세포 암종과 감별이 필요했던 굴모양 혈관 확장증 2예
현종훈 ( Jong Hoon Hyun ),조유경 ( Yoo Kyung Cho ),송현주 ( Hyun Joo Song ),최은광 ( Eun Kwang Choi ),현창림 ( Chang Lim Hyun ),권정미 ( Jung Mi Kwon ),김봉수 ( Bong Soo Kim ),송병철 ( Byung Cheol Song ) 대한소화기학회 2014 대한소화기학회지 Vol.64 No.4
Hepatic sinusoidal dilatation is a rare benign vascular disorder characterized by focal dilatation of the sinusoidal spaces. In most cases, the underlying etiology is unclear but it may be related to the impairment of venous outflow or sinusoidal infiltration by diverse causes. Diagnosing hepatic sinusoidal dilatation based soley on imaging study is not easy since there are no pathognomonic radiologic findings indicative of this condition. Recently, the authors experience two cases of hepatic sinusoidal infiltration. The first patient was a 53-year-old man detected to have multiple hepatic nodules on ultrasonography (US) during a routine medical check-up. The second patient was an 82-year-old woman with abdominal discomfort who was referred from local clinic with high suspicion of hepatic metastases on US. In both cases, CT scan demonstrated multiple nodules with rim enhancement on arterial phase that became iso-dense to adjacent liver parenchyma on delayed phase. On MRI, these nodules showed rim enhancement on arterial phase, had high signal intensity on T2 weighted images, and became iso-intense with partial defect on hepatobiliary phase. Because imaging studies could not exclude the presence of hepatic metastases, liver biopsy was performed and it demonstrated hepatic sinusoidal dilatation with well preserved reticulin fiber without any evidence of malignancy. Herein, we report two cases of idiopathic hepatic sinusoidal dilatation mimicking hepatic metastases. (Korean J Gastroenterol 2014;64:239-245)
윤용상(Yoon, Yong-Sang),윤재훈(Yoon, Jae-Hoon),현종훈(Hyun, Jong-Hoon),황우진(Hwang, Woo-Jin),신재규(Shin, Jae-Gue),최원기(Choi, Won-Ki),문선혜(Mun, Sun-Hye) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.10
This study focuses on thermal performance variations according to insulating glazing units and the set point temperature. We used the EnergyPlus rating, which is validated by the U.S. DOE. The results are as follows: In the case of a non-extended-type household: (1) The influence of SHGC rather than that of U-factor was found to be relatively high. Therefore the composition of glazing that may maintain SHGC at 0.5 or greater is deemed to be more desirable for energy savings. (2) When the manufacturing method of Low-e glass varies, the influence on the building energy consumption can change. Therefore, the designer is required to understand the composition of glazing in advance at the planning stages of the building. (3) In the case of Low-e insulating glass and Low-e triple glass, almost no difference exists between the influences of such on the energy demands of the building; however, Low-e insulating glass is deemed to be more reasonable from the economical aspect. In the case of an extended-type household: (1) The entire energy consumption increases in this case as compared with a non-extended-type household (2) In the case where a window faces the outdoor air, unlike a non-extended-type household, the U-factor and SHGC all have great influence on the building energy consumption, and therefore the construction of glazing in consideration of this is desirable. Lastly, as the set point temperature increases/decreases by 1℃, cooling/heating loads were found to increase/decrease by approximately 16% representing that the change in living patterns greatly influences on the reduction of building energy consumption. Further comprehensive studies on the influence of change in set point temperatures on the consumption of building energy should be conducted based on the expanded scope such as a block, unit complex, or district unit in order to recommend the method for reducing energy in apartment type housing.
커튼월 건물에 있어 창면적/바닥면적비와 건물에너지와의 상관관계 연구
윤용상(Yoon, Yong-Sang),문선혜(Mun, Sun-Hye),윤재훈(Yoon, Jae-Hoon),현종훈(Hyun, Jong-Hoon),최무혁(Choi, Moo-Hyuck),황우진(Hwang, Woo-Jin),신재규(Shin, Jae-Gue),최원기(Choi, Won-Ki) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.3
Recently, it has been concerned about overconsumption of the energy use of the newly-built curtain wall buildings with a large WWR(Window to Wall Ratio). However it is estimated that the influence of the window area on energy is changed according to the building size, preferably, WFR(Window to Floor Ratio) is correlated with building energy. EnergyPlus is used for a building energy simulation in this study. The results of the simulations show a building energy is relative to WWR, but there is a limitation to use for the index because of the building size. However, building energy is mostly relative to WFR, the correlation of this can be expressed a linear equation. Therefore, developing synthetic index according to WFR is acutely needed. And, in case of the solar gains according to a window area, the correlation can be expressed a logarithmic function, the more WWR become the more solar energy gains. The solar gains are about 5.04~5.40 times as large as an annual horizontal global radiation. If the synthetic index is developed through analysis of glazing performances(U-factor, SHGC, VLT), the index should be used for the window design of buildings.
미사일 발사체 포드의 진동 및 충격 안전성 검증에 관한 연구
김만달(Man-Dal Kim),홍성욱(Seong-Wook Hong),현종훈(Jong-Hoon Hyun),김동국(Dong-Kook Kim),이승준(Seung-Jun Lee) 한국생산제조학회 2015 한국생산제조학회지 Vol.24 No.3
The launcher pod for missiles capable of carrying a range of different warheads has been designed to be mounted on the tracked vehicle of the hybrid weapon system (HWS). In the development of this launcher pod, its structure was designed to be resilient to damage caused by shock and vibration, as well as preventing assembly errors due to the spring-back of the main composite cover and interfacing parts. This study investigated the design of the newly developed launcher pod, with its hybrid composite?metal structure, through simulation and experiment. Both simulation and actual experiments showed that the structure of the launcher is resilient to vibration and shock. The launcher pod was also subjected to vibration and shock tests to verify its performance.