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이진택,Chin Taik Lee 대한화학회 1974 대한화학회지 Vol.18 No.1
陰陽兩이온交換樹脂膜을 利用한 電氣透析에 의하여 電解質을 濃縮할때 濃縮液의 濃度, 透析量/電氣量 및 濃縮液增加量/ion透析量과 溶液의 濃度, 電流密度와의 關係를 實驗해 보았으며 膜內의 合水率, 이온의 移動度 및 電氣透析의 流速으로 해석됨을 알았다 The relation between the concentration of concentrated solution, the quantity of electromigrated solute/electricity and the increasing volume of concentrated solution/the quantity of electromigrated ion to the concentration of solution and the applied current density in the electrodyalisis using ion exchange membranes are studied. It is found that the experimental results on the above mentioned quantities can be understood by the ionic concentration in the membrane phase, the mobility of electrolytes and the flux of electro-osmosis.
8주 동안의 육상 교양수업 참여가 단거리 스타트 동작에 미치는 영향
이진택 ( Jin Taek Lee ) 한국운동역학회 2014 한국운동역학회지 Vol.24 No.3
The purpose of this study was to explore the effect of 8 weeks after school classes of track sports on students`` start motion through kinematic variables. 30 students in D National university of education participated for this study. These students divided into two groups, 17 students for experimental group and 13 students for control group. The two groups participated in general athletic class as common class, and the experimental group participated in after school class additionally. The general class taught track and jump skill for 3 hours a week, and the after school class taught only athletic running skill for 30 minutes a week. Pre and post test assessed to assess students’ kinematic changes. Findings indicated that velocity and step rate were increased, and contact time, step length, displacement of center of mass were decreased in the experimental group. In the control group, early velocity, knee/hip angle velocity were increased, and contact time, step length, displacement of center of mass were decreased. In conclusion, the students who only participated in general class, could not maintain athletic skills obtained from the class. However, students who participated in both general and after school class accomplish athletic start skill. This is because Continuous learning effect helped students keep the skill and did not lose the skill. Thus, in order for students to learn specific sport skills, joining after school class with general class together is recommended.
Stefan Holm의 높이뛰기 발구름 동작에서의 충격력과 상지와 하지 분절의 운동학적 분석
이진택 ( Jin Taek Lee ) 한국운동역학회 2011 한국운동역학회지 Vol.21 No.1
The purpose of this study was to investigate the kinetic factors of Stefan holm`s take-off motion and provide the technical data. Collected data of the subject(height: 181 cm, weight: 71 kg, record: 230 cm) were used for the last two strides and take-off phase. The results were as follows: The vertical impulse force was 2044.8 N which was 2.49 times and the anterior-posterior impulse force was -1306.4N which was 1.88 times of the subject`s weight. The take-off leg angular velocities(ωx, ωy) were switched drastically from clockwise to count clockwise direction between two-step touchdown and take-off. The highest jerk of the take-off foot was 368.97 m/s3 during the two step take-off and the take-off foot made an impact to the ground with 1225.07 m/s3 during the one step touchdown.
제자리멀리뛰기 동작의 팔 스윙 통제가 운동역학적 요인에 미치는 영향
이진택(Lee, Jin-Taek) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1
The aim of the study was to investigate how the presence or the absence of arm swing affects the biomechanical mechanism during standing long jump. Twenty-four male students (age: 20.3 ± 3.2 years, height 174.0 ± 4.6 cm, weight 67.3 ± 8.1 kg) majoring physical education from “D” university were recruited in order to achieve the purpose of the study. Six infrared cameras (Qualisys Oqus 300, SWE) and two ground reaction force measuring system (Kistler, Type9260AA6, SWI) were used for measuring kinematic and kinetic variables. The absence of arm swing during standing long jump lowered the horizontal velocity whereas, increased the vertical velocity. It is considered to be the result of being unable to utilize ground reaction force acting in the vertical direction while performing the leap. In addition, lower trunk angular velocity and moment were observed during the flight phase, as subjects were unable to from perform smooth trunk flexion which ultimately effected the counter movement.
두발 착지 후 최대 점프 동작 시 무릎 보호대 착용이 전방십자인대 부상 요인에 미치는 영향
이진택(Lee, Jin-Taek) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.3
The purpose of this study was to investigate the possibility of anterior cruciate ligament injuries by wearing a knee protector in the double leg landing after maximum vertical jump motion. The subjects recruited for the study were 19 males college students (age: 23.1±1.03 years, height: 1.73±4.56 m, weight: 66.9±6.08 kg). Six infrared cameras (Qualisys Oqus 3, SWE) and two ground reaction force (Kistler Type 9260AA6, SWI) were used to analyze the motion. Subjects performed double leg landing after maximum vertical jump wearing a knee brace, sleeve, and nothing (control condition). The conclusions obtained from this study are as follows. First, wearing knee brace and sleeve did not interfere with exercise performance. Second, wearing a knee brace and sleeve reduced knee flexion angle during landing. Third, brace reduced knee abduction moment, thus wearing a knee brace may contribute to the prevention of anterior cruciate ligament injuries.