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김의환,이요열,김성섭,권문석,김성호 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1
Kim, E-H · Lee , Y-Y · Kim, S-S· Kwon, M-S · Kim, S-H. The kinematical Analysis of the Overhead Kick on Soccer. Korean Journal of Sport Biomechanics. Vol. 13, No. 1,pp. 155-171. The purpose of this study was to analyze the kinematic variables of over head Kick(OHK) in soccer with three dimensional analysis technique and show the kinematic characteristics of it. The 7 subjects were university football player who have been playing football more than 7 years. The OHK was filmed on 16mm video camera(30frame/sec.) kinematic variables were temporal, postures, and COG(center of gravity). The mean values and the standard deviation for each variables were obtained and used as basic factors for examining characteristics of OHK. the results of this analysis were as follows : Temporal variables : The total time elapsed(TE) of OHK was0.94~1.14sec., the 1st phase was 0.35sec., 2nd phase was 0.46sec., and 3rd phase was 0.22sec.. Posture variables : When subjects performed OHK at the impact event, the ankle and knee angle of kicking foot were more extend than supporting foot. but the hip angle of supporting foot were more extend than kicking foot. Moving distance of the center of mass of the both foot : When subject performed OHK at the impact event, the range of distance on mediolateral direction aspect into right · left shoulder line, anteroposterior direction aspect was 20.9±10.5cm, vertical direction aspect was 92.3±19.9cm. Angular velocity : the faster angular velocity of knee · ankle on the kicking foot grew form jump position to landing position, the faster velocity of ball became. C. O. G. variables : When subject performed OHK at the impact event, upper part of the body was getting lower, lower part of the body was getting higher.
崔嶢煥 東國大學校 1965 論文集 Vol.2 No.-
The most remarkable groups among the organizations competing with each other in the society are the political party and the pressure group. The main purpose of this paper is th explain the nature and origin of the pressure group in modern democratic society (chiefly in the United States and the United Kingdom), and what has made it so important in the political society. It is my intention to make it clear to classify the pressure groups and make the groups, found generally in the nation-wide politics, distinguished from those organized on the comparatively permanent foundation, and specially to give an answer to the question how all the pressure groups enforce the government to adopt the policies they support while to rejecting those they object to so that they may influence the government on their public policy formations.
Sol-gel법으로 제조한 SrZrO₃ 피막의 접착강도 특성
예경환,송요승 한국항공대학교 항공우주산업기술연구소 2003 航空宇宙産業技術硏究所 硏究誌 Vol.13 No.-
SrZrO₃ resistive oxide barriers on Ag sheathed Bi2223 tapes were prepared by the sol-gel and dip coating method to reduce AC coupling loss. The performance of the dip-coated SrZrO₃, thin films was evaluated in terms of bond strength by varying Sr/Zr mol ratio and amount of organic vehicle (ethyl cellulose and a-terpineol) additives. Although bond strength of the coatings increased as the Sr/Zr ratio decreased and the amount of organic vehicle rose, the effect of organic vehicle addition was more pronounced, suggesting that adherence of the SrZrO₃ films on Bi2223 tapes was governed primarily by the amount of organic vehicle additive.