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분리형 코어를 이용한 초고층 구조 시스템의 횡력저항 성능 분석
김재요(Kim Jae-Yo),김필구(Kim Pil-Goo),엄태성(Eom Tae-Sung) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.8
With competitions for the building height at all parts of the world, the necessity for new structural system efficiently-resisting lateral loads is being increased. Especially, for super high-rise building, new considerations for lateral load resisting system is required to control lateral displacement which is increased by 4-square of building height. In this study, split cores are applied as a lateral load resisting system, and structural behaviors are studied by 3-D finite element analyses. The point load is laterally applied to top of 3-D model of building structures with single or dual cores and mega columns, and then the structural efficiencies are analyzed with the lateral displacements of top of buildings. The structural capabilities of single and dual core systems are compared, and the effects of various parameters - number of outriggers in a building, number of stories of a outrigger, sectional area ratios of columns and walls, and building height - on structural behaviors of high-rise building are analyzed. Also, through simple examples of lateral load resisting designs, the material quantities are compared. Finally, based on analysis results with various parameters, the guidelines for the efficient structural system with dual cores are presented.
김재준(Jae Joon Kim),이경수(Kyung Soo Lee),김재홍(Jae Hong Kim),노병인(Byung In Ro),장진요(Chin Yo Chang) 대한피부과학회 1984 대한피부과학회지 Vol.22 No.1
Bacteriological study, including antibiotic sensitivity tests, of 145 patients with pyodermas such as impetigo, superficial folliculltis, deep folliculitis, ecthyma, paronychia, cellulitis and secondary skin infections, was carried out during the period from June, 1981 to September, 1982 at the Department of Dermatology, Han II hospital. (countinued..)
김요식(Yo-Sik Kim),이광재(Kwang-Jae Lee),김건우(Kun-Woo Kim),오경현(Kyung-Hyun Oh),이택경(Taek-Kyung Lee),이재욱(Jae-Wook Lee) 한국전자파학회 2008 한국전자파학회논문지 Vol.19 No.2
본 논문에서는 FMM(Fast Multipole Method)을 적용하여 평면형 다층 구조인 마이크로스트립 프랙탈 안테나 구조에 대한 고속 해석을 구현하였다. 우선 FMM 알고리즘에 이용되는 적분식인 MPIE(Mixed Potential Integral Equation)을 풀기 위해서 실수축 적분 방법(RAIM: Real-Axis Integration Method)으로부터 정확한 공간 영역 그린 함수를 구한다. 구해진 그린함수를 MoM(Method of Moment)을 이용하여 계산할 경우, 연산과 메모리 요구량 O(N²)이 소요되는데, 이를 거대 구조의 해석에 대해 적용할 때나 높은 정확성을 위한 셀(미지수 N) 수의 증가하는 경우 계산량이 기하급수적으로 증가하여 구조 해석에 문제가 된다. FMM은 이와 같은 연산과 메모리 요구량의 문제점을 해결하기 위하여 개발되었다. FMM은 그린함수의 가법 정리(addition theorem)를 이용하여 행렬-벡터 곱의 복잡성을 줄여 연산과 메모리 요구량을 O(N<SUP>1.5</SUP>)으로 줄인다. 시어핀스키(sierpinski) 프랙탈 안테나의 구조에 대해 MoM과 FMM를 적용, 상용 툴과 계산 결과의 정확성, 계산 시 메모리 크기, 해석 시간 등을 비교하여 효율성을 보여주었다. In this paper, we present a fast analysis of multilayer microstrip fractal structure by using the fast multipole method (FMM). In the analysis, accurate spatial green’s functions from the real-axis integration method(RAIM) are employed to solve the mixed potential integral equation(MPIE) with FMM algorithm. MoM's iteration and memory requirement is O(N²) in case of calculation using the green function. the problem is the unknown number N can be extremely large for calculation of large scale objects and high accuracy. To improve these problem is fast algorithm FMM. FMM use the addition theorem of green function. So, it reduce the complexity of a matrix-vector multiplication and reduce the cost of calculation to the order of O(N<SUP>1.5</SUP>). The efficiency is proved from comparing calculation results of the moment method and Fast algorithm.
엘리트스포츠 지도자들의 대뇌 네트워킹과 직무 스트레스, 직무탈진의 관계 : 브레인 맵핑 분석
김재요(Kim, Jae-Yo) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.3
The purpose of this study is to investigate the relationship between cerebral networking, job stress and job exhaustion in elite sports leaders using brain mapping analysis. For this purpose, 60 elite sports leaders were analyzed. For this purpose, 60 elite sports leaders were analyzed. The results were as follows. First, the high-beta wave networking activities of the left frontal lobe and the right frontal lobe of elite sports leaders were positively related to occupational overload (.370, p<.01), security problems (.288, p<.05), working conditions (p<.05) were found to have a statistically significant effect on stress. In addition, high-beta wave networking activity between the right frontal and right occipital lobes was found to have a statistically significant effect on working conditions (.264, p<.05). Second, the high-beta wave networking activity of the left frontal lobe and the right frontal lobe of elite sports leaders has a statistically significant effect on post-personality burnout (.256, p<.05) and emotional exhaustion(.308, p<.05). Finally, the overloading factors of job stress of elite sports leaders showed a statistically significant effect on de-personification(.443, p<.001) and mental exhaustion(.357, p<.01). Also, role ambiguity factors showed a statistically significant effect on mental exhaustion(.137, p<.001).
김재선(Jae Sun Kim),김종민(Jong Min Kim),이일수(Eil Soo Lee),강신광(Shin Kwang Khang),노병인(Byung In Ro),장진요(Chin Yo Chang) 대한피부과학회 1986 대한피부과학회지 Vol.24 No.1
We observed the histopathologic findings of 21 biopsed materials those initial clinical impression was suspected as granuloma pyogenicum. Also we compared the cange in the number of mast cells in the lesion of the granuloma pyogenicum with those in the normal appearing skin by Giemsa stain, and the stainability of mucopolysaccharides in the stromal edema of granuloma pyogenicum lesion with that in the normal appearing skin by Alcian blue-PAS stain. The results were as fallows: The various microscopic diagnoses made in 8 cases, which was clinically granuloma pyogenicurn. These 8 cases were granulation tissue(3), subungual exostosis(1), dermatofibrorna(1), sebaceous epithelioma(l), liporna with granulation tissue(1), and malignant melanoma(1). 2. The number of mast cells in the granuloma pyogenicum lesion were increased (p<0.01), especially in the lesion which showed marked capillary endothelial proliferation, and the amount of mucopolysaccharides was increased in the stromal edema of the granuloma pyogenicum lesion.