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충전성을 개선한 각형CFT 기둥-보 접합부의 구조 특성
박제영,이명재,Park, Je Young,Lee, Myung Jea 한국강구조학회 2013 韓國鋼構造學會 論文集 Vol.25 No.2
CFT구조의 기둥-보 접합부는 강관의 국부좌굴을 방지하기위해 다이아프램이 필요하다. 외측다이아프램 형식은 관통다이아프램 형식보다 콘크리트의 충전성이 좋으나 시공성과 건축설비와 공조하는 측면에서 불편함이 있다. CFT구조 접합부의 상부 다이아프램은 외측다이아프램 형식으로 하고 하부 다이아프램은 관통다이아프램 형식으로 하였다. 이것은 건축물에서 바닥슬래브가 있으므로 상부 다이아프램은 바닥슬래브와 일체가 되고 하부 다이아프램으로 관통다이아프램을 적용하여 건축설비와의 마찰을 피하고자 한 것이다. 결과적으로 충전성을 개선시킨 CFT구조의 구조성능은 상, 하부 모두 관통다이아프램을 적용한 구조와 비교하면 동일하다는 것을 알 수 있다. CFT structures require a diaphragm to prevent buckling of steel at connections. An outer diaphragm has better concrete filling than a through diaphragm due to a large bore, but due to the larger size than the through diaphragm, it has poorer constructability and cooperation with building equipment. The building structure has a floor slab that was unified with the upper diaphragm, so the outer diaphragm was placed at the upper bound. Moreover, the through diaphragmwas placed at the lower connection to avoid obstruction of the building equipment. The CFT structure with the improved concrete filling showed the same structural behavior as the CFT structure with the use of the same type of diaphragms at the upper and lower connections.
야구 투수 시 볼 스피드에 따른 족저압 분포에 관한 분석
박제영 ( Je Young Park ),조정희 ( Jung Hee Cho ) 대한스포츠의학회 2008 대한스포츠의학회지 Vol.26 No.1
The aim of this study was to investigate the relationship between ball speed and foot pressure distribution. Ten overhead pitchers were volunteered. Subjects are divided into two groups; A(average throwing speed is around 130 km/h), B(average throwing speed is around 140km/h). All subjects completed pitching ten times from pitching mound distance. Among them, the results when the ball was decided as "strike" were collected to analyze. Foot pressure Measurement system(Capacitive sensors, Pedar Mobile, Novel, Germany) were used to measure foot pressure distribution. Pressure distribution is analyzed in ten sections on right foot during wind-up and arm cocking phase in which a foot contacts the surface. Among A group whose average pitching speed is 131.25±1.03km/h and B group whose speed is 139.39±1.61km/h, significant difference of p<0.05 is revealed on M4(Lateral Midfoot), M6(2ndMetatarsal), M7(Lateral Metatarsal) when the verifying of the difference between groups is conducted. The distribution of dynamic balance in wind-up phase according to group and individual is p<0.05 on only M3 and A group`s distribution is higher than that of B group on M4, M6, M7. When it comes to comparing phases, in arm cocking rather than wind-up phase, the significant decrease in group B is revealed than that of group A. As a result of this test, the dynamic balance of pitching is very important and it is necessary to train for improving ball speed hereafter.
여자 농구선수들의 포지션에 따른 원핸드 점프슛 동작의 운동학적 분석 ( 1 )
박제영(Park Je Young),김형수(Kim Hyung Soo) 한국사회체육학회 2000 한국사회체육학회지 Vol.14 No.-
The purpose of this study is to provide kinematic data of one hand jump shot for the women basketball player by comparing and analysing kinematic variables of one hand jump shot according to the players' positions. We performed three dimensional motion analysis of one hand jump shot for the 9 elite women basketball players. The conclusions are as follower. 1. Ball releasing point were prior to the peak points of COG in all group and a significant difference was obtained among the groups with regard to the elapsed time in LP TO(F=3.69, p=0.0900), RP(F=6.53, p=0.0312), PK(F=7.18, p=0.0256) phase. 2. The hight ratio at the lowest point of COG was 47.1% in guard group, 49.8% in forward group, and 53.2% in center group and a significant difference was obtained among the groups(F=6.09, p=0.0360). 3. The angle of release was 51.267±3.0925' in guard group, 56433±7.4527' in forward group, and 54.433±7.9387' in center group. The angle of arrangement was 20.133±12.5085 in guard group, 14.133 ± 3.9717 in forward group, and 26.867±6.4237' in center group. So it was concluded that arms were widened to the right in all subjects but no significant difference was obtained among the group (p<0.05). 4. The linear velocity of COG at the release was 1.014±0.3336/ms, in guard group, 1.404±0.3807m/s in forward group, 1.184±0.2508m/s in enter group. So it was concluded that forward group and center group properly used the propulsion force and raised the COG. fast at the release. But no significant difference was obtained among the groups (p<0.05). 5. The release velocity was 6.943±0.3840m/s in guard group, 6.883±0.1872m/s in forward group, 6.617±0.1365'/s in center group. But no significant difference was obtained among the groups (p<0.05).
2000-2001 시즌 한국프로 농구경기의 승 , 패 요인 분석
박제영(Je Young Park) 한국사회체육학회 2001 한국사회체육학회지 Vol.16 No.-
The results of the analysis of the contribution of win-loss factor in the 2000-2001 season korean basketball league are as follow; First, the rate of 2-point shots(2P%), the rate of 3-point shots(3P%), the rate of free throw shots(FT%), assists(AS), fastbreaks(FB), defensive rebounds(DR), steals(ST), good defenses(GD), blocked shots(BS), fouls with free throw(WFT), illegal defenses(ID) had significant difference between win and loss. Second, by discriminant analysis, the most important factor for the game result was defensive rebounds(DR), other factor can be ordered by the importance for the game result, and they were the rate of 2-point shots(2P%), the rate of 3-point shots(3P%), turnovers(TO). steals(ST), fouls with free throw(WFT). Third, the predicted accuracy rate of the game result was 86.22%. and it meant somewhat high cross validity of discriminant equation.
제27회 시드니 올림픽 남자농구경기의 승ㆍ패 요인 분석
박제영(Park Je-Young) 한국체육과학회 2001 한국체육과학회지 Vol.10 No.2
The results of the analysis of the 27th Sydney Olympic Men's Basketball Carre are as follow; First, rate of 2-point shot success(2P%), rate of 3-point shot success(3P%), rate of free throw shot success(FT%),offensive rebound(OR), defensive rebound(DR), assist(AS), blocked shot(BS) had significant difference between win and defeat. Second, by discriminant analysis, the most important factor for the game result was rate of 2-point shot success(2P%.). other factor can be ordered by the importance for the game result, and they were defensive rebound(DR), offensive rebound(OR), rate of 3-point shot success(3P%), rate of free throw shot success(FT%). and turnover(TO). Third, the predicted accuracy rate of the game result was 91.67%. and it meant somewhat high cross validity of discriminant equation.