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실험계획을 통한 자동차 촉매 소성 공정의 생산성 향상과 안정성 증대 연구
정철규,이창호 대한안전경영과학회 2019 대한안전경영과학회지 Vol.21 No.1
The diesel engine generate many pollutants such as PM(Particulate matter) and NOx(Nitrogen oxide). So the SCR(Selective catalytic reduction) must be required to meet the emission standard. The SCR catalyst market is growing rapidly, and the automobile markets using alternative energy sources are growing rapidly. This study deals with optimization of the calcination process the manufacturing process of SCR catalyst to be competitive. The calcination process is a bottleneck and it is required to optimize productivity and accept to be safety, But we cannot trade off anything in terms of safety. We applied DOE(Design of experiments) among many research methods performed in various fields. In order to achieve quality and productivity optimization. The dependent variables in the DOE were selected as NO Conversion(%). The independent variables were selected as the calcination temperature, soaking time and fan speed RPM. the CCD(Central composite designs) constructs response surface using the data onto experience and finds optimum levels within the fitted response surfaces. Our tests are our stability guarantee and efficient together with operation.
정철규,옥치상 고신대학교보건과학연구소 2003 보건과학연구소보 Vol.13 No.-
This study was to investigate the realities and effect on health promotion of pet dog breeding with 290 homes by questionnaire in Busan, Korea. Based on the results, in matter of the health promotion, sense of self satisfaction of the pet dogs breeding home showed significant (P<0.05) than non breeding home in the items of concept of family, concept of sharing the life together, prospect of pet industry, recommendation for breeding, mystery of life, conversation companion of the aged people, maintaining pleasure, consideration of other people, optimistic, regular living, satisfying with the present life, and fostering children's emotion. In children's education and fostering sociality, it was not significant on the items of increasing the number of words children speak, the chances contacting with nature, the mind to serve, and sunbath, but it was significant (P<0.05) on the items of friendly relationship with neighbors, recommendation for breeding pet animals, and repenting of breeding. In the sense of relationship with family, the time of returning home was not significant, but it was significant (P<0.05) on the items of conversation time, sense of relationship with family, and reduction of going out. In dissolving stress, the items of dissolving stress was significant, and it was significant on the item of leisure time of ole people (P<0.05). Exercise was not significant.
정철규,이우경 한국스포츠학회 2021 한국스포츠학회지 Vol.19 No.3
본 연구는 대학운동선수들을 대상으로 내적동기와 운동만족의 관계를 규명하여 대학운동선수들의 교육과 지도 를 위한 기초적인 자료를 제공하는데 그 목적을 두었다. 연구대상은 G시의 대학운동선수 210을 대상으로 하였다. 도출된 연구결과를 통한 주요 결론은 다음과 같다. 첫째, 내적동기와 운동몰입의 각 변인간 관계를 알아보기 위해 상관관계 분석 을 실시한 결과 모든 요인간의 통계적으로 유의한 상관관계를 발견하였으며, 내적동기이 긴장-압박 요인은 부적상관을 나타냈다. 둘째, 대학 운동선수들의 내적동기와 운동몰입간의 관계를 다중회귀분석을 통해 살펴 본 결과 긴장-압박이 인지몰입과 행위몰입에 통계적으로 유의한 부적 영향을 미치는 것으로 나타났다. 흥미-즐거움, 지각된유능감, 노력은 인지몰입과 행위몰입에 통계적으로 유의한 영향을 미치는 것으로 나타났다. 따라서 본 연구의 결과를 토대로 추후 연구 방향으로 대학엘리트 운동선수들의 다양한 현장상황에 대한 심리프로그램 교육자료들이 개발되어야 할것으로 사료된다. The purpose of this study was to investigate the relationship between intrincsic motivation and sport commitment among college athletes. Collegiate athletes (N = 210) completed the Intrinsic Motivation Inventory and Sport Commitment Behavior Scale to assess intrinsic motivation and sport commitment. The correlation analysis results indicated that pressure is negatively related to cognitive commitment and behavioral commitment while all other intrinsic motivation factors have a positive correlation with cognitive commitment and behavioral commitment. Results of regression revealed that the statistically significant independent variables impacts on sport commitment. These findings support the previous studies, and the implications of the results were discussed.
정철규,김종석,박재웅 大田産業大學校 2001 한밭대학교 논문집 Vol.18 No.-
It seemed that after exposure of radiation absorption of 10 ― 50 kGy to thin film with crystallization, in the polyethylene crystallization structure, in that there is deterioration actual condition with vapor shape, polyethylene is vulnerable in all radiation territory, and as deterioration in the polypropylene occur only in the crystallization and its boundary surface, boundary of crystallization is vulnerable to radiation. This deterioration increase in proportion to radiation. Finally, radiation have a electrically, mechanically, physically bad effect to crystallization of polyethylene and polypropylene, there is fatal effect to insulation efficiency.