765 kV 2회선 송전선 활선 작업자 인체내부 유도전류 밀도 해석

송기현,민석원,Song, Ki-Hyun,Min, Suk-Won 대한전기학회 2006 전기학회논문지C Vol.55 No.5

This paper analysed the induced current density inside human body of hot-line worker for 765kV double circuit transmission line according to locations of human body. Human model was composed of several organs and other parts, whose shapes were expressed by spheroids or cylinders. Organs such as the brain, heart, lungs, liver and intestines were taken into account. Applying the 3 dimensional boundary element method, we calculated induced current density in case a worker was located inside and outside a lowest phase of 765 kV transmission line in which a 60% current of maximum load flowed. As results of study, we found a maximum induced current density in all organs was less than $10mA/m^2$ when a wonder was outside. As one in brain and heart was higher than $10mA/m^2$ when a worker was inside, we propose a method for lowering current density.

60Hz ELF 자계에 대한 고 도전율 및 고 투자율 재료의 차폐효과 분석

송기현,명성호,민석원,Song Ki-Hyun,Myung Sung-Ho,Min Suk-Won 대한전기학회 2005 전기학회논문지C Vol.54 No.4

Shielding methods on ELF(Extremely Low Frequency) magnetic fields may include the use of induced currents, modification of magnetic field flux patterns using high permeability and/or high conductivity materials, and others. The magnetic shielding properties of enclosures can be utilized to reduce the magnetic field of current carrying conductors. In this paper, to get a more practical understanding of shielding phenomena, we have investigated the magnetic field reduction by means of 3 dimensional numerical analysis and experiments. We found copper could reduce flux density more then permalloy in both cases of box shield and cylindrical shield. Iron under l0$\mu$T of 1 phase could reduce flux density about $20\%$ more than silicon steel, but both of them under 50$\mu$T has a similar reduction rate of $10\%$. The 3 phase horizontal model gave the highest reduction rate and the 1mm thickness iron under 10$\mu$T of 3 phase lines did lowest.

생활체육 참여자의 각성추구성향과 운동몰입 및 여가만족의 관계

송기현(Ki Hyun Song),허진영(Jin Young Huh) 한국여가레크리에이션학회 2010 한국여가레크리에이션학회지 Vol.34 No.1

The purpose of this study was to identify Relationship among arousal seeking, exercise commitment, and leisure satisfaction in the participant of sports for all. In order to obtain purpose of the study, member of sport for all clubs (N=275) who are currently registered in business sport center were recruited in Seoul and Gyeonggi-Do area by using the convenience sampling technique. The data were recorded and analyzed using SPSS ver. 14.0 to perform Frequency Analysis, Correlation Analysis and Multiple Regress Analysis. Results are as follows. First, arousal seeking have significantly influenced on exercise commitment. Thrill seeking has not influenced on both recognition and behavior flow. Novelty seeking has influenced on both recognition and behavior flow. Second, exercise flow of participant has influenced on leisure satisfaction. Recognition flow has influenced on all sub factors of leisure satisfaction, such as emotion, social, physical, environmental, and education satisfaction. Third, arousal seeking of participant has partially influenced on leisure satisfaction. Thrill seeking has influence on only environmental satisfaction. Novelty seeking has influenced on all sub factors of leisure satisfaction.

대학 교양 체육수업에서 피드백 유형과 피드백 활용 능력 및 운동자기도식의 구조적 관계

송기현(Song, Ki-Hyun),임현묵(Lim, Hyun-Muk) 한국체육과학회 2022 한국체육과학회지 Vol.31 No.5

The purpose of this study aims to analyze the structural relationship between feedback type, feedback utilization ability and behavior exercise self-schema in university liberal arts physical education class. subjects of this study were 400 students from three universities in Seoul and the metropolitan area, and 382 valid samples were used. data were analyzed using SPSS WIN Ver. 20.0 for frequency analysis and correlation analysis, and AMOS 20.0 was used for confirmatory factor analysis and structural equation model analysis. Analysis results, First, performance knowledge/positive nonverbal feedback and encouragement/praise feedback except negative nonverbal feedback had significant effects on feedback utilization ability. Second, feedback utilization ability was found to affect behavior exposure self-schema. Third, in the relationship between feedback type and behavior exercise self-schema, the effectiveness was significant only in encouragement/praise feedback and cognitive emotional self-schema.

e스포츠 1인 미디어 속성과 지각된 유용성 및 재이용의 관계

송기현(Song, Ki-Hyun) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.6

This study aimed to analyze the attributes of one-person e-sports media and relations between perceived usefulness and reuse and further the mediating effects of perceived usefulness on relations between the attributes of one-person media and reuse. For this purpose, the investigator conducted an online survey with adults aged 19 or older who had experiences with watching one-person gaming broadcasting via PC, TV, or smartphone. The questionnaire was sent via SNS including Kakao Talk, Facebook, text message, and online community cafes, and 286 people filled it out voluntarily via the URL. Data collected from them was treated with SPSS 20.0 and AMOS 20.0 and tested for fitness for the entire model. Hypothesis testing led to the following conclusions: first, the study examined relations between the attributes of one-person media and perceived usefulness and found that reliability and intimacy had significant positive effects on perceived usefulness; secondly, reliability and intimacy from the attributes of one-person media had significant effects on reuse; thirdly, perceived usefulness had significant effects on reuse; and finally, perceived usefulness had mediating effects on relations between the attributes of one-person media and reuse.

대학 스키, 스노보드 수업의 심리적 학습환경과 자기조절학습 및 운동지속의 관계

송기현(Ki Hyun Song),허진영(Jin Young Huh) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.40

The purpose of this study was to identify the relationship among psychological learning environment, self-regulated learning, and exercise adherence in college ski and snowboard class. To obtain the purpose, 274 students who took ski or snowboard class as a cultural course in D university answered the questionnaire using convenient sampling method. Data which is obtained through self-administration was analyzed using by the frequency analysis, correlation coefficient, factor analysis and multiple regression. Results are as follows. First, relationship, independence, and investigation factors of psychological learning environment have significantly influenced on both goal orientation and achievement value of self-regulated learning. Relation and investigation factors have significantly influenced on only self-efficacy. Second, goal orientation, self-efficacy, and achievement value of self-regulated learning have significantly influenced on predisposing and reinforcing of exercise adherence. Both self-efficacy and achievement value have significantly influenced on enabling of exercise adherence. Third, independence and investigation of psychological learning environment have significantly influenced on predisposing of exercise adherence. Only investigation factor have significantly influenced on both enabling and reinforcing.

구조개선을 통한 전계완화용 폴리머컷아웃스위치의 개발

송기현(Ki-Hyun Song),민석원(Suk-Won Min),안소윤(So-Yoon An),김영희(Young-Hee Kim) 대한전기학회 2016 대한전기학회 학술대회 논문집 Vol.2016 No.7

통제적 코칭행동과 운동탈진의 관계에서 청소년 선수들의 운동정체성과 접근-회피동기의 다중매개효과

송기현 ( Ki Hyun Song ),정구인 ( Koo In Jung ) 한국스포츠심리학회 2014 한국스포츠심리학회지 Vol.25 No.4

Purpose: The purpose of this study was to test the mediating effects of athletic identity and approach-avoidance motivation on relations between controlling coach behaviors perceived by adolescent athletes and athletic burnout from the perspective of the Self-Determination Theory(Deci & Ryan, 1985). Methods: The subjects include 407 middle and high school athletes(boys=220, girls=187) attending an athletic or general middle and high school in the Seoul metropolitan region and Chungcheong Province. Collected data were put to the fitness test of the overall model and hypothesis test with SPSS 18.0 and AMOS 18.0. Results: The findings were as follows: first, athletic identity turned out to have mediating effects on relations between controlling coaching behaviors and athletic burnout. Second, the mastery-approach and performance-avoidance of approach-avoidance motivation had mediating effects on relations between controlling coaching behaviors and athletic burnout. Finally, both athletic identity and the mastery-approach, performance-approach, and performance-avoidance of approach-avoidance motivation had mediating effects on relations between controlling coaching behaviors and athletic burnout. Conclusion: Those findings show that coaches`` controlling coach behaviors induce negative athletic identity and avoidance motivation and thus facilitate athletic burnout.

체육수업에서 교사의 피드백, 학생들의 능력에 대한 믿음 및 자기핸디캡간의 구조적 관계

송기현(Song, Ki-Hyun),허진영(Huh, Jin-Young) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.4

The purpose of this study was to identify the construct relationship between teacher’s feedback, ability belief, and self-handicapping of students in physical education class. To obtain the purpose, 298 high-school students from Gyeonggi-do area answered questionnaire using convenient sampling method. Data which is obtained through self-administration was analyzed using by the frequency analysis, EFA, CFA, and SEM with SPSS 18.0 and AMOS 18. Results were as followed. First, knowledge of performance/positive nonverbal feedback of teachers have positively influenced incremental belief while negative nonverbal feedback has negatively influenced on that. The negative nonverbal feedback has influenced on entity belief. Second, the only negative nonverbal feedback of teachers has influenced on self-handicapping of students. Third, the entity belief has influenced on self-handicapping of students. Results were discussed.

대학 스키, 스노보드 수업에서 지각된 지도자의 피드백과 동기-행동적 조절전략 및 지속의도의 관계

송기현(Song Ki-Hyun),허진영(Huh Jin-Young) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.3

The purpose of this study was to identify relationship among perceived teacher’s feedback, motivational-behavioral regulation strategies, and exercise adherence in participants of university ski and snowboard class. In order to obtain purpose of the study, participants of activity courses at D university (N=276) were recruited by using the convenience sampling technique. The data were recorded and analyzed using PASW Statistics 18.0 to perform frequency analysis, exploratory factor analysis, correlation analysis and Multiple Regress Analysis. Results are as follows. First, the negative nonverbal feedback of perceived teacher’s feedback has negatively influenced on self-efficacy, goal-orientation, and achievement value of motivational-behavioral regulation strategies. The positive nonverbal feedback has positively influenced on self-efficacy and achievement value. The positive general feedback has influenced on goal orientation of motivational-behavioral regulation strategies. Second, the knowledge performance of perceived teacher’s feedback has influenced on behavioral control and help-seeking of motivationalbehavioral regulation strategies. The negative nonverbal feedback has negatively influenced on behavioral control. The positive nonverbal feedback has positively influenced on help seeking. Third, the self efficacy, goal orientation, achievement value have influenced on intention to continuance. Fourth, the behavioral control and help seeking has influenced on intention to continuance. Fifth, the knowledge of performance has influenced on intention to continuance. The negative nonverbal feedback has negatively influenced on intention to continuance.