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김창윤(Kim Chang-Yoon),김형관(Kim Hyoung-Kwan),김창완(Kim Chang-Wan),한승헌(Han Seung-Heon),김문겸(Kim Moon-Kyum) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.12
Diverse research efforts that have been conducted are reflected in the patent information. Patent analysis facilitates the understanding of the major technological area and how the technologies change. It provides the essential data for strategy development of research and development. In this paper, based on literature analysis and expert review, 40 keywords had been selected for searching advanced construction patents. 737 patents of US, EU, and Japan during January 1991 and May 2006 are analyzed. Technology trends of each phase of construction lifecycle are derived through the patent data and patent map analysis. Construction research and development strategies are deduced based on the patent analysis. This research effort suggests a systematic methodology for how patent information is incorporated into new construction research and development plans.
김동찬,김호겸,민창기,김태현,김용욱 경희대학교 디자인연구원 2003 예술· 디자인학연구 Vol.6 No.1
The purpose of this study is to design a basic draft of a monumental inscription with a poem of a peace for stirring up a peaceful mind. The inscription is expected to be a place for arousing a peaceful mind to visitors. Moreover, this place can be a place for culture and rest, which uplifts the image and phase of Kyunghee University to both.
텅스텐(Ⅴ)-티오시안산 置換 피리딘錯物의 合成과 그 性質
김창진,양겸석 대구대학교 산업기술연구소 1982 産業技術硏究 Vol.2 No.1
Two types of thiocyanato-tungsten(Ⅴ)-substituted pyridine complexes, such as WO NCS)₃(x-py)₂(x-py)(x-py were pyridine, 2-amino pyridine, 3.5- lutidine and 2- amino-4-picoline) and WO(OH)(NCS)₂(x-py)(x-py were pyridine, α-picoline, 2-amino pyridine and 4-acetylpridine) have been prepared. The physical properties such as conductances, magnetic moment and spectroscopy of the thiocyanato-tungsten(Ⅴ)-substituted pyridine complexes have been studied. From the results the complexes are paramagnetism and none-ionic complexes. It is found that the these tungsten(Ⅴ) complexes are insoluble in water, alcohol, acetone or dimethyl formamide, etc. and unstable in air atomosphere. From the assignment of the infrared spectra of the thiocyanato-tungsten(Ⅴ)-substituted pyridine complexes, it was shown that tungsten was combined with nitrogen of thiocyanate ligand.
여러 경계조건을 가진 평판의 스프라인 유한대판법에 의한 해석
서창범,김문겸,황학주 연세대학교 산업기술연구소 1985 논문집 Vol.17 No.2
Finite strip method, developed by Cheung to improve the finite element method, uses trigonometric series as longitudinal interpolation functions. Although this method is useful and highly accurate for simple structures, it cannot be used for structures with complex boundary conditions. The objective of this study is to get rid of this effect of finite strip method using B-spline functions as displacement functions in analyzing plates. Stiffness matrices are derived using principle of minimum total potential energy for a plate element. An algorithm is developed and applied to plate with various boundary conditions. To demonstrate the accuracy and versatility of developed method, the results of the method were compared with those from the closed-from solution and the finite element method. As a result, the presented method is proved to be more accurate and economical than the finite element method, and applicable to plates with complex boundary conditions.
盧泰完,金昌謙 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-
We developed a numerical method for the problem of dissipating pore-water in hydraulic fills. The Dufort-Frankel's finite difference algorithms were applied to the problem with remodeled boundary conditions. The result showed that the horizontal drain with the vacuum consolidation is more efficient than self-weight or horizontal drain without vacuum in consolidating hydraulic fills.
김창겸(Chang Kyum Kim),이호진(Ho Jin Lee),김성덕(Sung Duk Kim),오병철(Byung Cheol Oh),최지은(Ji Eun Choi) 한국방재안전학회 2023 한국방재안전학회 논문집 Vol.16 No.4
미래 기후 시나리오에 따르면 우리나라 자연재해의 주요 요인인 태풍의 강도는 강해질 것으로 전망된다. 태풍 강도 증가는 내습 파고 상승으로 이어져 주거, 산업, 관광 등의 용도로 인구 및 건물 밀집도가 높은 연안 지역의 대규모 피해발생 가능성이 높은 상황이다. 따라서 본 연구에서는 동해 해양기상부이 관측자료를 분석하여 최대 유의파고가 나타난 태풍 마이삭(202009) 내습 기간에 대해 파랑추산 수치모형 실험을 수행하였다. 파랑추산실험 경계조건은 JMA-MSM의 바람장과 SSP5-8.5 미래 기후 시나리오의 태풍 중심기압 감소율을 적용한 바람장을 사용하였다. 파랑추산실험 결과 SSP5-8.5 시나리오에서 속초항 방파제 전면에서의 파고는 4.06 m에서 4.68 m로 15.27% 증가하였다. 또한, 심해설계파 147-2 격자점 위치에서의 재현빈도는 최소 2배 이상 증가하는 것으로 산출되어, 현재 해안구조물 설계 시 관행적으로 적용하는 50년 재현빈도 심해설계파에 대한 제고가 필요하다. According to the climate change scenarios, the intensity of typhoons, a major factor in Korea’s natural disaster, is expected to increase. The increase in typhoon intensity leads to a rise in wave heights, which is likely to cause large-scale disasters in coastal regions with high populations and building density for dwelling, industry, and tourism. This study, therefore, analyzed observation data of the Donghae ocean data buoy and conducted a numerical model simulation for wave estimations for the typhoon MAYSAK (202009) period, which showed the maximum significant wave height. The boundary conditions for wave simulations were a JMA-MSM wind field and a wind field applying the typhoon central pressure reduction rate in the SSP5-8.5 climate change scenario. As a result of the wave simulations, the wave height in front of the breakwater at Sokcho port was increased by 15.27% from 4.06 m to 4.68 m in the SSP5-8.5 scenario. Furthermore, the return period at the location of 147-2 grid point of deep-sea design wave was calculated to increase at least twice, it is necessary to improve the deep-sea design wave of return period of 50-year, which is prescriptively applied when designing coastal structures.
양창휴(Chang-Hyu Yang),류철현(Chul-Hyun Yoo),정지호(Ji-Ho Jung),김병수(Byeong-Su Kim),박우균(Woo-Kyun Park),유진희(Jin-Hee Ryu),김택겸(Taek-kyum Kim),김재덕(Jae-Duk Kim),김성조(Seong-Jo Kim),백승화(Seung-Hwa Baek) 한국토양비료학회 2008 한국토양비료학회지 Vol.41 No.2
The physico-chemical properties of ten reclaimed saline soils in five soil series of west-south Korea were analyzed according to the years past after reclamation. The soil samples were collected at the same sites two times in 2000 and 2004. The physico-chemical properties in 2000 had been changed in 2004 as follows. Soil salinity was the highest in Podu and desalinization period was the shortest in Munpo and Yeompo. Seasonal ground water level were above 100 cm in all regions that were 30 years old reclaimed tidal land, which was the same results of normal paddy field. In the case of soil physical changes, bulk density increased in fine textured soil (Poseung and Podu) but decreased in coarse textured soil (Gwanghwal, Munpo, and Yeompo). Porosity decreased in fine textured soil(Poseung and Podu) but increased in coarse textured soil. These reason were as follows. Fine textured soil were increased in solid phase but decreased in liquid and gaseous phase. Coarse textured soil, Gwanghwal and Munpo except for Yempo, were increased in gaseous phase but decreased in solid and liquid phase. Yempo that have low water table level were increased in liquid phase but decreased in solid and gaseous phase. Soil hardness increased in 4 soil series except for Munpo. In the case of chemical property changes, although there were more or less difference, it showed decreasing tendencies. Soil pH, the content of organic matter, available phosphate, and available silicate of five soil series were decreased during the four years. The content of exchangeable cation also decreased except for magnesium.