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이연종(Yeon Jong Lee),장정연(Jung Yeon Chang) 한국여성체육학회 2011 한국여성체육학회지 Vol.25 No.4
The purpose of this study is to analyze the technical skills of the Javelin throw on highly ranked male elite players, participating in the 2011 National Athletic Championship. It analyzed the kinematical variables of approach, deliverly and release phases during performing Javelin throw. To collect the kinematic data, it was employed 6 cameras and Kwon3D Motion Analysis Package(Kwon, 2000) for analyzing the kinematic variables. After analyzing the results, the following conclusions were drawn. Therefore A and B should be to keep the efficiently kinetic energy from approach phase for performing the effective cross phase and D is required to practice the transfer to effective center of gravity from approach to cross phase. In Deliverly phase, A should be maintained the stable step and B should be minimized the velocity loss after the left foot touch down. In release phase, B should be thrown the javelin with extended arm for the powerful javelin throw and D should be minimized the attack angle.
태권도 발 자세에 따른 빠른발 돌려차기 동작의 운동학적 분석
이연종(Yeon Jong Lee),진승태(Seung Tae Chin) 한국여성체육학회 2011 한국여성체육학회지 Vol.25 No.2
The purpose of study was to investigate the kinematical analysis of Parhunbal Dolrhochagi Motion by three different stance pattern in Taekwondo by using the 3-dimentional cinematographic method. 3 subjects participated in this study were ranked as national taekwondo players. The subject`s Parhunbal Dolrhochagi Motion was filmed with 2 video cameras at the 30 frames per second and digitized from the ready position to impact moment. After analyzing the kinematical characteristics of Parhunbal Dolrhochagi Motion, the following findings are obtained: Stance A showed the stable Parhunbal Dolrhochagi Motion and stance C showed the faster thigh and body velocity and the powerful Parhunbal Dolrhochagi motion with the large bending and extension movement. In summary, at the velocity point of view, stance C is the best stance pattern.
이연종(Lee, Yeon-Jong),박성수(Park, Sung-Soo) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.11
For the prediction of impact noise, most analytical studies focus on the vibration characteristics of the structure has been concentrated. But, Most of it can not explain the thing that different floors with the same section make a different impact noise. In addition, Resonant amplification of impact noise, caused by indoor air gap, can not be predict by those methods. These limitations is occurred by analytical tools, such as impedance method, does not consider the existence of air gap. This study estimates is performed to assess the validity of fully coupling analysis for predicting impact noise with air gap.
조성봉(Seong Bong Cho),이연종(Yeon Jong Lee) 한국사회체육학회 1999 한국사회체육학회지 Vol.11 No.-
The purpose of this study was to examine the biomechanical characteristics on Taekwondo Apchagi motion, and to grope for the better Apchagi technique. The subjects were nationally ranked three taekwondo players. 2 high speed cameras were used for the data collection. The Direct Linear Transformation(DLT) technique was employed to obtain 3-D position coordinates of 24 landmards(Abdel-Aziz & Kararah, 1971) and a cubic spline function was used for smoothing and differentiation. In also calculates the location of center of mass using Plagenhoef`s data. In this study, Apchagi motion was divided into 4 events(RD, TO, MKA and IMP) and three phases. From those, displacement of COG, Velocity of thigh, leg, foot in kicking foot and angle and angular velocity of hip, knee and ankle joint in kicking foot were calculated, and the following conclusions were drawn: 1. Displacement showed longer in c.o.g from take-off of kicking foot to maximum flexion of knee joint. 2. Velocity showed faster in thigh and foot from take-off kicking foot to maximum flexion of knee joint. 3. Angle showed larger in hip, knee and ankle joint from maximum knee flexion of kicking foot to impact. 4. Angular velocity showed faster in ankle joint from start to take-off kicking foot, in knee joint from maximum flexion of knee joint to impact and in hip joint from take-off kicking foot to maximum knee flexion. 5. Vertical ground reaction force showed higher at the moment of maximum knee flexion.
풍하중에 대한 횡변위 제한 값을 만족하는 단일 아웃리거 시스템 건물의 한계 세장비에 대한 연구
양재광(Yang, Jae-Kwang),이연종(Lee, Yeon-Jong),박성수(Park, Sung-Soo) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
The demand on high-rise buildings increased, lateral drift control became a most important design variable, at the same time, various lateral drift control system were proposed and outrigger structural system was one of these typical systems. In recent years, the optimal location of outrigger has been proposed. The maximum of lateral drift vary according to the slenderness ratio of structure, even the structures were set as similar heights and outriggers were also set at the optimal locations. Commonly, There"s no knowing that the limitation of the maximum lateral drift either meets the requirements or not limitation of the maximum lateral drift as just at the optimal location of outriggers simply. This paper transformed the equation on the optimal location of singular outrigger proposed by Taranath. Equation of limitation of slenderness ratio on structures with singular outrigger on the optimal location were proposed singular outrigger on the optimal location, limitation of slenderness ratio was also proposed.
풍하중에 대한 횡변위 제한 값을 만족하는 단일 아웃리거 시스템 건물의 한계 세장비에 대한 연구
양재광(Yang, Jae-Kwang),이연종(Lee, Yeon-Jong),박성수(Park, Sung-soo) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.1
The demand on high-rise buildings increased, lateral drift control became a most important design variable, at the same time, various lateral drift control system were proposed and outrigger structural system was one of these typical systems. In recent years, the optimal location of outrigger has been proposed. The maximum of lateral drift vary depending on the slenderness ratio of structure, even the structures were set as similar heights and outriggers were also set at the optimal locations. Commonly, There’s no knowing that the limitation of the maximum lateral drift either meets the requirements or not limitation of the maximum lateral drift as just at the optimal location of outriggers simply. This paper transformed the equation on the optimal location of singular outrigger proposed by Taranath. Equation of limitation of slenderness ratio on structures with singular outrigger on the optimal location were proposed singular outrigger on the optimal location, limitation of slenderness ratio was also proposed.
송성섭(Song, Sung-Sup),이연종(Lee, Yeon-Jong),최재일(Choi, Jae-Il) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.1
The purpose of this study is validation on the theory of planned behavior between exercise intention and behavior activity of model. The study sample included students from undergraduate students of school located in Chungbuk Korea. The participants of this study were involved in 224 undergraduate students of school. The criterion of include was age between 18 and 27 years. Two hundred and twenty two undergraduate students completed self-administered questionnaires measuring attitude, subject norm, perceived behavioral control, behavioral intention, exercise behavior. The conclusions showed: (1) Subjective norm maintained convergent validity. (2) Attitude toward the behavior maintained discriminant validity. (3) Exercise intension and behavior activity are adapt to measurement the planned behavior.