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학생운동선수의 외과수술에 대한 지각된 위험과 의료기관 선택의 관계
박병학(Park, Byung-Hak),김기섭(Kim, Ki-Sup) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.5
The purpose of this study is to investigate a relationship between perceived risks of surgical operation and choices over medical clinic of student athletes. To secure the preliminary data of this study, this study surveyed 400 1st, 2nd, 3rd, and 4th grade physical education major students of K, Y, and D University located in metropolitan area. Among 400 students, survey data of 312 students excluding inappropriate or incomplete answer sheets were adopted. The collected questionnaire was analyzed using a statistics program, the SPSS Version 18.0 Program. This study conducted correlation analysis and multiple regression analysis to investigate a relationship between perceived risks of surgical operation and choices over medical clinic of student athletes. Specific research results obtained through the research process are as follows. Perceived risks made significant effect partly on subfactors of choices over medical clinic as reputation, internal physical environment, service quality, and external physical environment. It was identified that reputation of choices over medical clinic makes negative effect on psychological risk and financial risk, and service quality makes negative effect on psychological risk and performance risk and positive effect on financial risk. External physical environment made negative effect on financial risk.
유한요소법에 의한 소형선박용 엔진의 피스톤에 대한 온도해석
김옥삼(Ok Sam KIM),박병학(Byung Hak PARK) 전남대학교 수산과학연구소 1994 수산과학연구소논문집 Vol.3 No.-
The analysis of temperature distribution is substantilly important in optimal design of engine. In this study, temperature analysis of the aluminum alloy piston of small sized ship during high speed driving (3000rpm) is analyzed the two-dimensional heat conduction problem using finite element method(FEM). Formulation of FEM based weighted residural method were presented for the analysis of the two dimentional axis symmetric conditions. And the pre and post-processor are composed for the easy decision of result and the exact analysis, and outcomes are plotted by using AutoCAD and AutoLISP. The consequence obtained in this study are summurrized as follows. In temperature distribution analysis, maximum temperature was shown in the centre of the crown, and the great temperature gradient was occurred on the wall of the piston.
Young-Woong Song(송영웅),Jehong Im(임제홍),Min-Young Kim(김민영),Ho-Sung Kim(김호성),Youngsun Hong(홍영선),Byung Hak Park(박병학),Dong Yoon Lee(이동윤),Jae Heon Lee(이재헌),Jaekook Kim(김재국),Jinsub Lim(임진섭) 한국전지학회 2022 한국전지학회지 Vol.2 No.1
최근, 기후변화의 영향으로 재생가능 자원 개발 문제가 큰 주목을 받고 있다. 리튬이온배터리(LIBs)는 화석 연료의 대안으로 제공되어 자동차 산업에서 특히 주목을 받고 있다. 그러나 LIB가 보여주는 배터리 수명과 해당 주행거리에 한계가 있다. LIB 내의 열 관리는 배터리 수명을 결정하는 중요한 요소이다. 본 연구에서는 수동적 열 관리 시스템을 제공하는 상변이 물질(PCM)을 다양한 조건에서 분석하였다. PCM으로 덮인 LIB에서 얻은 결과는 덮지 않은 참조 셀에서 얻은 결과와 비교하였다. PCM은 온도를 조절하여 셀에 의해 나타나는 열화를 감소시킬 수 있는 것으로 나타났다. 따라서 PCM은 LIB 성능의 개선을 촉진할 수 있음을 보여준다. At present, the issue of renewable resource development has attracted significant attention owing to the effects of climate change. Lithium-ion batteries (LIBs) have received particular attention within the automotive industry as they provide a viable fossil fuel alternative. However, the commercialization of electric vehicles is currently limited by the battery life, and corresponding mileage, exhibited by LIBs. Thermal management within the LIB is a significant factor in determining the lifetime of the battery. In this study, a phase change material (PCM), which provides a passive thermal management system, was analyzed under various conditions. The results obtained from the PCM-covered LIB were compared with those obtained from a reference cell without the PCM covering. It was shown that the PCM can regulate the cell temperature, thereby reducing the deterioration exhibited by the cell. This PCM characteristic can, therefore, facilitate an improvement in the LIB performance.
한방병원에 입원한 요통 환자의 요추 전만각, 요천각 변화의 심각도에 따른 예후 분석 연구
한수빈 ( Su-bin Han ),김은산 ( Eun-san Kim ),김효준 ( Hyo-jun Kim ),조후인 ( Hoo-in Jo ),김미혜 ( Mi-hye Kim ),이남우 ( Nam-woo Lee ),한정훈 ( Jeong-hun Han ),박병학 ( Byung-hak Park ),손재민 ( Jae-min Son ),강도현 ( Do-hyeon Kang 한방재활의학과학회 2020 한방재활의학과학회지 Vol.30 No.4
Objectives To analyze the prognosis of patients with low back pain according to the severity of abnormal lumbar lordotic angle and Ferguson's angle. Methods Data from electronic medical record of a total of 199 patients hospitalized in Korean medicine hospital were analyzed. With the sagittal view of lumbar spine X-ray, lumbar lordotic angle was defined as the angle between the superior endplate of L1 with the inferior endplate of L5. Ferguson’s angle was defined as the angle between the superior surfaces of the sacral with a horizontal line. ‘Measure Cobb’s Angle Tool’ of ‘INFINITT PACS’ was used to measure both angles. Lumbar lordotic angle and Ferguson's angle were subdivided into five sections. The number of days from onset and the duration of hospitalization were analyzed in each section. Results Severe hypolordotic lumbar lordotic angle group were found to have longer medical history and hospitalization duration than the control group. The ratio of long-term hospitalization (over 15 days) and chronic medical history (over 180 days) of patients with severe hypolordotic Ferguson’s angle were significantly higher than the control group. The ratio of patients with chronic medical history (over 180 days) was significantly higher in severe hyperlordotic Ferguson's angle group than the control group. Conclusions Severe hypolordotic lumbar lordotic angle was related to patient’s prognosis. Both severe hyperlordotic and severe hypolordotic Ferguson’s angle were found to be related to patient’s prognosis. However, a moderate loss of lumbar lordotic angle and Ferguson’s angle was not related to prognosis of low back pain patients. (J Korean Med Rehabil 2020;30(4):143-154)