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스포츠센터 동호인의 자기관리행동이 자기통제력에 미치는 영향
권동일(Kwon, Dong-Il),남경완(Nam, Kyung-Wan),임승현(Lim, Seung-Hyun) 세계태권도문화학회 2017 세계태권도문화학회지 Vol.8 No.1
This research investigates how sports center users’ self-management affects their self-control. This research will provide fundamental data that identify ways to popularize sports centers and contribute to positive community development of sports through individual change. The purpose of this study is to provide empirical data in order to increase program development for self-control and to provide training resulting in positive change to self-management. There are five sports centers between D metropolitan city and G city. We surveyed users who are from these five sports centers. We explained the object of this study to two graduate students, who already had a prior education, and one researcher. Survey subjects carried out the survey by one of the non-probability sampling, the sampling method in an independent location. We gathered data from 569 subjects and utilized SPSS 18.0 program of Windows in order to draw a conclusion with frequency analysis and factor analysis, reliability analysis, correlation analysis, and multiple regression analysis. First, it shows that the sports center members who displayed good self-management and self-control are statically correlated. Second, it shows that the sports center members who displayed good self-management and its sub factors such as willpower management and life management, intrinsic behavior, and physical management have a positive outcome to self-control of impulsive behavior. Third, it shows that the sports center members who displayed good self-management and its sub factors such as willpower management and life management, intrinsic behavior, and physical management have a positive outcome to self-control of task completion. Fourth, it shows that the sports center members who displayed good self-management and its sub factors such as willpower management and life management, intrinsic behavior, and physical management have a positive outcome to self-control of self-centeredness. Fifth, it shows that the sports center members who displayed good self-management and its sub factors such as willpower management and life management, intrinsic behavior, and physical management have a positive outcome to self-control of negative emotions.and a behavioral commitment, and in a cognitive commitment, a behavioral commitment, a sincerity and an ability, we could verify significant correlations. Third, It proved that player s concentration is influenced by a behavioral pattern of training and instruction, a democratic behavioral pattern, and an authoritative behavioral pattern, which are the sub-factors of leaders leadership. This conclusion shows that a leader s leadership and confidence are very crucial factors when it comes to takwondo players concentrating on the game and maintaining their best game handling ability in the competition. Therefore, there is a need for developing various programs and applying them with taking interest in and caring for takwondo players.
김성훈,최열,권동일,Kim, Sung-Hoon,Choi, Yeol,Kwon, Dong-Il 대한기계학회 2004 大韓機械學會論文集A Vol.28 No.5
Hardness test is performed for determination of the other properties, such as strength, wear resistance and deformation resistance, as well as hardness itself. And it is performed for prediction of residual lifetime by analysis of hardness reduction or hardness ratio. However, hardness test has limitation that observation of residual indent is needed for determination of hardness value, and that is the reason for not to be widely used in industrial field. Therefore, in this study, we performed researches to obtain Brinell hardness value from quantitative numerical formula by analysing relationship between indentation depths from indentation load-depth curve and mechanical properties such as work hardening exponent, yield strength and elastic modulus.
계장화 압입시험에 의한 용접부의 물성 측정 및 피로수명 예측
구병춘,이동형,권동일,최열,Goo, Byeong-Choon,Lee, Dong-Hyung,Kwon, Dong-Il,Choi, Yeol 한국철도학회 2004 한국철도학회논문집 Vol.7 No.2
When material properties depend much on positions in a material or it is difficult to make test specimens from a material or component, an instrumented indentation test described in ISO 14577-1, 14577-2 or KS B 0950 can be used to measure material properties and damage. In this study, first of all, the principals of the instrumented indentation test, KS B 0950 are introduced and yield strengths, tensile strengths and work hardening exponents of base materials, heat affected zones and weld materials are measured. In addition, the influence of post-weld heat treatment on the material properties is investigated. Finally the fatigue lift of butt welded specimens are evaluated by the local strain approach. To calculate local strains and stresses, elasto-plastic finite element analysis is conducted using the measured properties.