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입구 유동 가진이 있는 충돌 제트의 난류 열전달 특성 해석
권동호(Dong Ho Kwon),박태선(Tae Seon Park) 대한기계학회 2020 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.8 No.2
입구 가진이 있는 충돌 제트에 대해 비정상 난류 모델을 이용한 난류 열전달 특성이 해석되었다. 입구는 시간에 대한 삼각 함수 형태의 가진이 주어졌다. 레이놀즈수가 23,000일 때 St=0.1-0.5 범위에서 5개의 주기와 세 종류의 가진 진폭을 변화시켰다. 유동의 변화는 St=0.4일 때 크게 변하였고 그에 따른 열전달 증가가 확인되었다. Turbulent flows and heat transfers for an impinging jet with the perturbed inlet are numerically analyzed by URANS (unsteady Reynolds averaged Navier-Stocks equation) models. The inlet has a sinusoidal variation of time. When the Reynolds number is 23000, five frequencies of St=0.1-0.5 and three amplitudes are selected. The flow structure is severely changed at St=0.4 and the enhancement of wall heat transfer is confirmed for that condition.
김범수(Bum Soo Kim),권동호(Dong Ho Kwon) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.43
The purpose of this study was to examine the structural relationship among passion, health belief and intention to continue exercise in participants of life sport. For this study was carried out among the participants of life sport in Seoul areas. Researched material was analyzed using SPSS 15.0 and AMOS 6.0 programs to draw exploratory-confirmatory factor analysis, structure model analysis, correlation analysis and reliability analysis. The analyzed facts were as following. First, the study showed that the obsessive passion of life sport participants influenced negatively(-) on perceived barrier except for perceived susceptibility, perceived severity and perceived benefit. Second, the study showed that the harmonious passion of life sport participants influenced positively(+) on perceived susceptibility, perceived severity, perceived benefit and perceived barrier. Third, the study showed that perceived susceptibility and perceived benefit except for perceived severity, perceived barrier influenced positively on intention to continue exercise of life sport participants.
중장년 신체활동 참여자의 건강신념, 자기효능감과 건강실천행위
김범수(Bum Soo Kim),권동호(Dong Ho Kwon) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.42
The purpose of this research was to identify the relationship among health belief, self-efficacy and health promotion behavior in physical activity participants. To process the data, this research conducted exploratory-confirmatory factor analysis, correlation analysis, reliability analysis and structure model with SPSS 15.0 and AMOS 7.0 program. The results were as follows. First, physical activity participants` health belief had significantly positive influence on self-efficacy. Second, physical activity participants` health belief had not significant influence on health promotion behavior. Third, physical activity participants` self-efficacy had significantly positive influence on health promotion behavior.