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이종용접부 용접 잔류응력 완화를 위한 국부 열처리 적용성 분석
정명수(Myung Su Jung),오영진(Yeong Jin Oh),김현수(Hyun Su Kim),오승진(Seung Jin Oh),원세열(Se Yeol Won),이경수(Kyoung Soo Lee) 대한기계학회 2018 大韓機械學會論文集A Vol.42 No.1
최근 가압경수형 원전의 이종금속 용접부에 적용된 니켈합금 용접재에서 일차수응력부식균열에 의한 손상이 발생하고 있다. 이에 이러한 손상을 예방하고 효율적으로 관리하기 위한 다양한 방법이 개발되고 있으며, 국내의 경우 노즐 교체 및 오버레이 용접 등이 시행된 바 있다. 하지만 교체 및 정비의 경우, 전체 이종금속 용접부 중 한정된 부분에만 적용이 가능하고 예방정비 기간 연장 등 상당한 시간 및 비용이 소요되므로 일차수응력부식균열 발생 완화를 위한 새로운 기술 개발이 필요하다. 본 연구에 서는 일차수응력부식균열의 주 원인으로 알려진 잔류응력을 저감시키기 위한 다양한 국부 열처리 방법론을 제시하고 각 방법론 별 잔류응력 완화효과를 분석하였다. Recently, primary water stress corrosion cracking (PWSCC) has occurred at dissimilar welds where nickel alloy weldments are used in pressurized water reactors (PWRs). The damage mitigation and effective management techniques, such as nozzle replacement and overlay welding, have also been developed and applied to Korean PWRs. However, these methods are only applicable to limited areas, are time consuming, and costly. Therefore, a new methodology for preventing PWSCC needs to be developed. In this research, various methodologies for local heat treatment to reduce the residual stress are suggested and their effects on the residual stress relaxation are examined in detail.
정명수(Myung Su Jung),김장환(Jang Hwan Kim) 한국사회체육학회 1997 한국사회체육학회지 Vol.8 No.-
This research analyzed 250 leasure and sports leaders interviewed individually who work for commercial sport facilities to analyze factors influencing turnover of leisure and sports leaders. Of the 250 questionnaires, 223questionnaires were analyzed. The results are as follows. First, most of the leisure and sports leaders interviewed were competitive leaders who understand their business related to their field and can explain in details their special fields to customers. So they could he called the people who know plans and goals of the business and have confidence. But their fruit, pride, self-conceit, accomplishment, spontaneity were not correlated to working conditions (a=0.05). Thus, factors influencing turnover are not resulted from internal satisfaction, but external factor, relation to their places of work(r=.18). Second, the more the leisure and sports leaders have a good relationship with owners of work place, the more they have good relationship with customers and colleagues. It is not correlated to the items that they receive proper pay, comparing with other job, they can find another job easily and work place improves their social position and dignities. it reflects that personal relationship is not a direct cause of turnover. However, the more satisfied with their places of work, the more realize that problems in their it place work is their problems to solve and there was relatively high correlation to good conditions of their place of employment, work place environment. and equipments for safety supervision(r=.57). and the more work place is stable, that is, less discharge without notice or unjust personal changes, the more the leisure and sports leaders were satisfied with pay and relationship with executives, customers and colleagues. Third, in case of intention of turnover, changing to another sports facility on which are attendant house moving was highly correlated to intention of changing to other sports facilities for better work environment and pav(r=.44). And the item that if there is a sports facility which pay more, you would change to there was highly correlated to the item that have you ever tried to ask for help from friends, family members or relatives for changing to other facilities because of skeptism about work place.(r=.44).
해양레저스포츠산업에 대한 정부지원과 동호회구성이 회원의 관계네트워크 및 참여행동에 미치는 영향
정명수(Myung Su Jung),정형식(Hyung Shik Jung),김홍남(Hong Nam Kim),김영심(Young Shim Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.42
The present study empirically investigate the role of sport club membership and government support on the vitality of marine leisure sport industry. A total of 160 survey data with clubs were used in the final analysis. The results are as follws. First, the effects of the government support on marine sports, the strong will of the particular club leader, and the club member`s personal experience of activities on the reinforcement of internal relation network and interactions with other clubs significantly affected both the reinforcement of internal relation network and interactions with other clubs. The results call for meetings among the leaders and support for them in order to activate the network. Second, the effect of the reinforcement of the internal relation network and interactions between clubs on activity extension and intent to participate significantly affected intent to participate. Third, interactions between clubs significantly affected both activity extension and intent to participate. It is necessary to search for ways to expand marine leisure sports activities through activating interactions among clubs. Forth, the effect of activity extension on event participation & the effect of activity extension and event participation on intent to continue marine leisure sports did not affect event participation, but it significantly affected intent to continue marine leisure sports. Finally, club network should be extended to establish diversity in marine leisure sports activities and to maintain sports population. In addition, the current marine sport event situations and their potential problems should be examined, as if the current events provide the club members with sufficient interests and excitement to continue their participation.
스마트폰 애플리케이션을 활용한 프로스포츠 구단 광고가 소비자태도에 미치는 영향
정명수(Jung, Myung-Soo),윤봉우(Yun, Bong-Woo),신수미(Shin, Su-Mi) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.1
The purpose of this study was to analyze the effect of sports team’s advertisement by utilizing smart-phone Application on customer attitude. To achieve this purpose subject was selected by visiting games stadium man interested in volleyball and use smart-phone in Cheon-an. Total 300 surveys were distributed and 260 samples(86.6%) were finally used after eliminating 40 incomplete samples using. The data was analyzed by frequency analysis, reliability analysis, correlation analysis, confirmatory factor analysis by using SPSS 14.0 and AMOS 7.0. The findings of this study were as follows. First, consumer response of application advertisement had effect on advertising attitude. Second, consumer response of application advertisement had effect on consumer satisfaction. Therefore sports team’s has to enhance the mobile service such as SNS application to encourage the consumer participation as well as develop the separated marketing strategy for each target market. More results and implications are suggested.