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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.
위장관 ; 장폐쇄를 동반한 크론병 환자에서 내과적 치료에 대한 반응 예측 인자
김은 ( Eun Kim ),윤세효 ( She Yo Yune ),하정민 ( Jung Min Ha ),이우주 ( Woo Joo Lee ),황지원 ( Ji Won Hwang ),민신영 ( Sin Young Min ),홍성노 ( Sung Noh Hong ),장동경 ( Dong Kyung Chang ),이풍렬 ( Poong Lyul Rhee ),김재준 ( Jae J 대한소화기학회 2013 대한소화기학회지 Vol.62 No.4
Background/Aims: Crohn`s disease is a chronic inflammatory bowel disease. Stricture is a very important indication for surgical intervention as strictures can lead to intestinal obstruction. Strictures can be divided into inflammatory and fibrous strictures. Intestinal obstruction due to inflammatory stricture is expected to be resolved with medical treatment. However, factors that can predict the response to medical treatments are unknown. In the present study, we aimed to identify the factors that can predict the response to medical treatments in Crohn`s disease patients with intestinal obstruction. Methods: Data were collected by retrospectively reviewing the medical records of patients with Crohn`s disease who visited the emergency department at Samsung Medical Center in Seoul from January 1, 2000 to December 31, 2010 because of intestinal obstruction. Based on the response to medical treatments, we classified the patients as responders and non-responders and compared the clinical, biochemical, and radiological findings of the two groups. Results: A total of 39 patients were enrolled. Twenty-nine patients responded to medical treatments whereas 10 patients did not. Significant differences were observed between the two groups in terms of vomiting and duration of disease before the development of obstruction. Conclusions: Patients who responded to the medical treatments exhibited a higher incidence of vomiting and longer duration of disease before the development of obstruction. However, further prospective studies are needed to identify the factors that can predict the response to medical treatments. (Korean J Gastroenterol 2013;62:213-218)
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..)
청소년 태권도 수련생의 참가동기와 수련만족 및 학교생활만족의 구조적관계
김재요(Kim, Jae-Yo),백정민(Baek, Jung-Min) 한국사회체육학회 2017 한국사회체육학회지 Vol.0 No.69
The purpose of this study is to construct a hypothetical research model and to verify its validity in order to analyze the causal relationship among participation motivation, training satisfaction and school life satisfaction of adolescent Taekwondo practitioners. In order to achieve this, 250 of middle and high school students who are taking Taekwondo lessons were selected as subjects by objective sampling method. The data were analyzed by frequency analysis, exploratory validity analysis, confirmatory factor analysis, reliability analysis, correlation analysis and structural equation modeling analysis using SPSS 21.0 and the AMOS 18.0. The results of this study are as follows. First, the achievement of participation motivation for teenage Taekwondo practitioners showed a statistically significant effect on the psychological satisfaction. The psychological satisfaction had a positive effect on the school life satisfaction. Also, psychological satisfaction showed a significant mediating effect on the achievement of participation motivation and school life satisfaction. Second, the physical fitness of teenagers in Taekwondo practice showed a statistically significant effect on social satisfaction. Social satisfaction had a positive effect on school life satisfaction. Also, Social satisfaction showed a significant mediating effect on the relationship between motivational motivation and school life satisfaction.
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.