대학신입생들이 교양체육수업에서 인식한 교수자의 사회적지지 행동이 자기효능감에 미치는 영향

최진훈(Choi, Jin-Hun),양재영(Yang, Jae-Young) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.1

The purpose of this study was to investigate the influence of social supportive behaviors defined as autonomy, competence and relatedness support provided by physical educators on self-efficacy among university freshmen in physical education classes. 309 students took part in university physical education classes for one semester and completed two well-validated questionnaires. A multiple linear regression analysis was used to examine the relationships between three social supportive behaviors and students’ self-efficacy. The results of this study indicated competence support significantly influenced students’ self-efficacy during their physical education classes. The findings imply that competence supportive behaviors such as effective feedback, praise, and encouragement provided by teachers can promote students’ self-efficacy to draw confidence and efficiency on their performance, which in turn leads to enhanced performances during their physical education classes.

생활체육지도자의 코칭역량이 지도자신뢰 및 운동몰입에 미치는 영향

최진훈(Choi, Jin-Hoon),이도희(Lee, Do-Heui) 한국사회체육학회 2015 한국사회체육학회지 Vol.0 No.59

This study aims providing fundamental data and information on leisure sport industry by studying what effects of leisure sport instructors’ coaching ability on instructor trust and exercise commitment. The survey was done through 400 members in 4 sport center in Seoul and Gyeonggi and excluding 22 copies ran an analysis on the remaining 378(94.5%) copies. After question investigating the data which is collected used SPSS 18.0 and AMOS 18 program, frequency analysis, Exploratory factor analysis, confirmatory factor analysis, correlation analysis, path analysis through Structural Equation Model(SEM). The result of this study were as follows. First, professional in leisure sport instructor’s coaching ability showed (+) effects on instructor trust. Second, teaching belief in leisure sport instructor’s coaching ability showed (+) effects on instructor trust. Third, self-control in leisure sport instructor’s coaching ability showed (+) effects on instructor trust. Fourth, social network in leisure sport instructor’s coaching ability showed (+) effects on instructor trust. Fifth, instructor trust showed (+) effects on exercise commitment.

한국전통 누룩에서 분리한 Wickerhamomyces anomalus SC-1의 양조특성

최진훈 ( Jin Hoon Choi ),김계원 ( Gye Won Kim ),이희윤 ( Hee Yoon Lee ),박천석 ( Cheon Seok Park ),심재용 ( Jae-yong Shim ) 한국산업식품공학회 2019 산업 식품공학 Vol.23 No.3

본 연구에서는 산업 현장에서 병행복발효 술덧 양조에 사용되는 입국과 개량누룩을 전분 당화용 발효제로 사용하고, 대한민국 강원도 삼척 지역에서 수집한 누룩에서 분리·동정한 W. anomalus SC-1을 사용하여 양조를 실시한 결과, 산업용 알코올 발효 효모 S. cerevisiae 대비 동등한 알코올 생성능을 보였고 유기산은 두 효모 모두 입국을 사용한 경우 citric acid, 개량누룩을 사용한 경우 lactic acid가 가장 많이 생성되었다. W. anomalus를 적용한 와인 및 중국 백주 제조를 위한 술덧의 품질 개선을 위한 다양한 연구 결과가 보고되고 있으므로 우리나라 고유의 전통주류 양조 기전의 규명과 주질 다양성 확보 및 이를 통한 차별화된 품질의 전통주 제조를 위하여 전통누룩 중 주요 알코올 발효 미생물로 분리되는 S. cerevisiae 외 야생효모의 알코올 발효 특성과 S. cerevisiae와의 상호작용에 대한 심화 연구의 필요성에 대한 단서를 제공할 수 있었다. The brewing and sensory properties of Korean traditional alcohol beverage are greatly influenced by yeast acting as alcohol fermentation microorganism. Therefore, this study investigated the brewing characteristics of Wickerharmomyces anomalus SC-1, non-Saccharomyces cerevisiae isolated from Korean traditional Nuruk. Ipguk and Nuruk were used for fermentation agents. Alcohol content was not significantly different between SC-1 and S. cerevisiae widely used in the market. Fermentable sugars were consumed more rapidly in the case of W. anomalus SC-1 than S. cerevisiae. Acidity in Ipguk treatment was higher than that of Nuruk throughout the fermentation period regardless of types of yeast. Citric acid was major organic acid in Suldut treated with Ipguk, whereas, lactic acid was major in Suldut treated with Nuruk in both yeasts. These results suggest that W. anomalus SC-1 showed the possibility for the use of new wild yeast strain as a candidate in simultaneous two-step fermentation for brewing Korean traditional alcohol beverage.

골프연습장의 서비스 품질이 서비스 가치, 고객만족 및 재이용 의도에 미치는 영향

최진훈(Choi, Jin-Hoon),박주영(Park, Joo-Young) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.3

The purpose of this study is to investigate the effect of the service quality of a golf driving range on the service value, customer satisfaction and reuse intention. The study subjects were selected from the customers of a golf driving range in Namyangju city in Gyeonggi province. The surveys were carried out on 300 customers by convenience sampling, and finally, the data from total 230 participants were used for analysis. The collected survey data were analyzed by using AMOS 19.0 and SPSS 19.0, in which frequency analysis, reliability analysis, correlation analysis, confirmatory factor analysis and structural equation model analysis were used. The results obtained from these research procedures are as follows. First, when the effects of the service quality on the service value were analyzed, only tangibility, reliability, responsiveness, and empathy among the service quality factors have been found to affect the service value. Second, when the effects of the service quality on the customer satisfaction were analyzed, only tangibility, reliability, responsiveness, and assurance among the service quality factors have been found to affect the service value. Third, it was shown that the reuse intention was not affected by the service value. Fourth, it was found that the customer satisfaction affected the reuse intention positively.

멘토역량 멘토기능이 신뢰 자기효능감 및 선수만족에 미치는 영향

최진훈(Choi, Jin-Hoon),김원중(Kim, Won-Jung),최영래(Choi, Young-Lae) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.1

The purpose of this study was to influence of trust, self efficacy and player satisfaction on mentor competency, mentor function to golf players. To achieve the object of this study, it was carried out on 400 golfers who have participation in golf match. Among them, the data of 400 golf players except 4 data of players who answered unsincerely were used to be analyzed in real. The results of this study are shown as below(SEM: Structural Equation Modeling); The first, there was not a significant influence to mentor function by mentor competency. The second, there was a significant influence to trust by mentor function. The third, there was a significant influence to mentor function by player satisfaction. The forth, there was a significant influence to mentor function by self efficacy. The fifth, there was a significant influence to trust by player satisfaction. The sixth, there was a significant influence to self efficacy by player satisfaction. The seventh, it was not proved that the mediator variables which were trust have a mediator effect on the independent variable the mentor function and player satisfaction. The eighth, it was proved that the mediator variables which were self efficacy have a mediator effect on the independent variable the mentor function and player satisfaction.

대학교양체육수업에서 학생들이 인식한 기대가치이론 변인들이 체육활동 지속의도에 미치는 역할

최진훈(Choi, Jin-Hun),양재영(Yang, Jae-Young),정주호(Jung, Ju-Ho) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5

The purpose of this study was to verify the influences of expectancy-value theory on persistence intention of physical activity among university students participating in physical education classes. A total of 814 students took part in the activities such as fitness, yoga, tennis, golf, and badminton for one semester in 2017. The participants completed self-reported questionnaires assessing variables including expectancy beliefs for ability and success, importance, interest, and usefulness for activities in physical education classes. The results drawn from multiple linear regression analyses showed all variables played a significant role in predicting for persistence intention on physical activity. The coefficient of determination of the analyzed model revealed about 40%, which indicated a strong predictive effect of expectancy-value model. The study findings based on expectancy-value theory perspective provide empirical support for promoting physical activity among university students, which in turn produces educational implications for university physical educators.

Constrained H<SUB>∞</SUB> Optimal Control

Jinhoon Choi(최진훈) 대한전기학회 2000 전기의 세계 Vol.49 No.9

중발열량 합성가스 생산을 위한 일체형 이중유동층 가스화 기술 연구

최재명(Jae-Myeong Choi),김재민(Jae-Min Kim),김성현(Sung-Hyun Kim),손양승(Yang-Seung Son),이동민(Dong-Min Lee),최진훈(Jin-Hoon Choi),박성열(Sung-Youl Park),김성수(Seong-Soo Kim) 한국청정기술학회 2013 청정기술 Vol.19 No.3

바이오매스 또는 가연성 폐기물로부터 중발열량(2,500-5,000 kcal/Nm³) 합성가스를 생산하기 위한 5 kg/hr 처리규모 일체형 이중유동층 가스화기를 제작하고 가스화 온도, 원료 투입량, 수증기/원료 무게비(S/F) 등의 운전조건이 가스화기의 거동에 미치는 영향을 조사하였다. 가스화 온도와 원료 공급량이 증가할수록 발생되는 합성가스 중 H₂와 CO 농도, 합성가스 유량, 냉가스 효율은 증가하였다. 반면에 수증기/원료 무게비가 실험범위 내에서 증가할수록 발생되는 합성가스 중 H2와 CO 농도, 합성가스 유량, 냉가스 효율은 감소하였다. 원료가 목분인 경우 H₂ 농도 41%, CO 농도 32%, 냉가스 효율 70.1%, 합성가스 저위발열량 3,428 kcal/Nm³이 가능하였다. 원료가 음식폐기물인 경우 H₂ 농도 37%, CO 농도 23.9%, 냉가스 효율 66.7%, 합성가스 저위 발열량 3,670 kcal/Nm³이 가능하였다. A 5 kg/hr scale integral dual fluidized-bed gasifier for producing medium heating value syngas from biomass or combustible wastes was manufactured. The effect of operating variables including gasification temperature, rate of feeding, and weight ratio of steam/feed on the behavior of the gasifier was investigated. The contents of H₂ and CO in syngas, flow rate of feeding, cold gas efficiency increased with the increased gasification temperature or rate of feeding, but decreased with the increased weight ratio of steam/feed within the experimental range. With wood powder as the feed, the concentrations of H₂ and CO in the syngas were as high as 41% and 32%, and the cold gas efficiency and lower heating value of the syngas were as high as 70.1% and 3,428 kcal/Nm³. With food wastes as the feed, the concentrations of H₂ and CO in the syngas were as high as 37% and 23.9%, and the cold gas efficiency and lower heating value of the syngas were as high as 66.7% and 3,670 kcal/Nm³.

전사지를 이용 적층한 셀 구조 및 연료극 기능층 형성에 따른 출력 특성

안용태,지미정,구자빈,최진훈,황해진,최병현,An, Yong-Tae,Ji, Mi-Jung,Gu, Ja-Bin,Choi, Jin-Hoon,Hwang, Hae-Jin,Choi, Byung-Hyun 한국재료학회 2012 한국재료학회지 Vol.22 No.11

The properties of SOFC unit cells manufactured using the decalcomania method were investigated. SOFC unit cell manufacturing using the decalcomania method is a very simple process. In order to minimize the ohmic loss of flattened tube type anode supports of solid oxide fuel cells(SOFC), the cells were fabricated by producing an anode function layer, YSZ electrolyte, LSM electrode, etc., on the supports and laminating them. The influence of these materials on the power output characteristics was studied when laminating the components and laminating the anode function layer between the anode and the electrolyte to improve the output characteristics. Regarding the performance of the SOFC unit cell, the output was 246 $mW/cm^2$ at a temperature of $800^{\circ}C$ in the case of not laminating the anode function layer; however, this value was improved by a factor of two to 574 $mW/cm^2$ due to the decrease of the ohmic resistance and polarization resistance of the cell in the case of laminating the anode function layer. The outputs appeared to be as high as 574 and 246 $mW/cm^2$ at a temperature of $800^{\circ}C$ in the case of using decalcomania paper when laminating the electrolyte layer using the in dip-coating method; however, the reason for this is that interfacial adhesion was improved due to the dense structure, which leads to a thin thickness of the electrolyte layer.

발프론산 유발 무증상 고암모니아혈증의 유병률 및 위험 인자에 대한 전향적 연구

안소현(So-Hyun Ahn),최진훈(Jin-Hun Choi),김드레(Dre Kim),한송이(Song-I Han),이선우(Sun-Woo Lee) 대한생물치료정신의학회 2013 생물치료정신의학 Vol.19 No.2

Objectives:This is prospective study to identify the prevalence of hyperammonemia in patients who take valproate, and the characteristics of hyperammonemia group. Also, the study attempts to examine the factors affecting increase of ammonia. Methods:The study included 25 patients in Chung-Nam University hospital who were to take valproate. Sociodemographic information was collected. The level of ammonia in the blood was measured before taking valproate, and on the first, second, third, and fourth weeks after taking valproate. Also, liver function test, dose of valproate, therapeutic drug monitoring of valproate, and combined drugs were measured at each period. Fisher’s exact test, Mann-Whitney test, and Bivariate correlation analysis were conducted using SPSS, 18.0 version. Results:The prevalence of hyperammonemia induced from valproate was 72%. The highest level of ammonia was 227 mmol/L and the average of the highest level of ammonia was 69.1 mmol/L. There was no significant difference in gender, age, academic ability, dose of valproate, or therapeutic drug monitoring. Hyperammonemia is able to occur in normal liver function. The level of ammonia increased as the level of ammonia before taking valproate was higher and the level of taking benzodiazepine was lower. Conslusion:This study found that valproate induced hyperammonemia is common, which suggests it is necessary to measure blood ammonia level in patients taking valproate. This study could be useful to researches on encephalopathy caused by hyperammonemia, and suggests the necessity of following studies to identify risk factors affecting hyperammonemia.