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이경태,최재혁,김장열,김준호,박성률,박현규,김진수,Lee, Kyung-Tai,Choi, Jae-Hyuck,Kim, Jang-Yeol,Kim, Jun-Ho,Park, Sung-Ryul,Park, Hyun-Kyoo,Kim, Jin-Su 대한정형외과스포츠의학회 2006 대한정형외과스포츠의학회지 Vol.5 No.2
축구는 유산소와 무산소운동이 혼합된 형태의 구기이고, 축구에서 필요로 하는 신체 능력은 지구력, 근력, 스피드, 순발력 및 유연성 등이 있으며, 이중 골 결정력에 영향을 미치는 인자는 순발력이 필수적인 것으로 알려져 있다. 그러나, 최근 축구의 경향을 보면, 스피드를 중시하는 미드필더의 강한 압박을 기본으로 하는데, 따라서 체력적인 요소 중에서 스피드에 더 많은 관심이 모아지고 있다. 이런 스피드의 요소에 대하여 자세히 알아보도록 하자. The football was the ball sport using aerobic and anaerobic exercise both. And than a body ability to need has the endurance, strength, agility and flexibility at the soccer. The fact to influence the ability of the made of goal was especially agility and player's view. Now, tendency to emphasize the position that midfield playing with fast speed do strong pressure in modern soccer. Let's find out about speed element.
LRP(Layer-wise Relevance Propagation)를 이용한 딥러닝 데이터세트 건전성 확인에 대한 연구
김택규(Taek-Kyu Kim),김장열(Jang-Yeol Kim) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
In the nuclear field, deep learning is highly expected to improve not only safety, but also the economy. Deep learning is a class of machine learning based on learning data representation, as opposed to task-specific algorithms, and is based on statistical methods. It analyzes collected dataset to determine meaningful features and predicts future data. However, deep learning has a disadvantage that is depended on trained dataset. If the wrong data is included in dataset, deep learning can make wrong decisions. Thus, a method for examining dataset quality is required. We propose applying layer-wise relevance propagation (LRP) algorithm to check the dataset quality. We additionally implement LRP algorithm on our deep-learning model and check the LRP pattern for each input. According to this inspection, we find wrong data in dataset and improve the dataset quality.
발레가 여성 족부의 관절각 및 발목의 등속성 근력과 고유수용성 감각에 미치는 영향
이정필 ( Jeong Pil Lee ),김장열 ( Jang Yeol Kim ),이경태 ( Kyoung Tae Lee ) 대한스포츠의학회 2008 대한스포츠의학회지 Vol.26 No.2
The purpose of this study was to examine the effects of ballet participation on foot joint angles, isokinetic strength and proprioception of ankle in females. 12 ballet dancers and 12 normal females as a control group were participated. Standing lateral weight bearing radiographs of foot of individuals were taken and angles between bones (proximal first metatarsal-base angle (MTP), talometatarsal angle (TM), Bohler`s angle (CP)) were measured. To measure peak torque of dorsi flexors, platar flexors, invertors and evertors, isokinetic strength tests were performed with Biodex III(R) (Biodex, USA). Proprioception test were performed with Biodex balance system. The results were drawn; MTP were significantly lower in ballet dancers compared with control. All of isokinetic strengths were significantly higher in ballet dancers compared with control except for the strength of right plantar flexor at 120°/sec and right invertor at 30°/sec angular velocity, whereas there were no significant differences between isokinetic strengths of right and left ankle. The level of proprioception was significantly higher in ballet dancers com-pared with control. There was significantly positive correlation between proprioception and MTP, and there were significantly negative correlation between proprioception and both isokinetic muscle strength of right dorsi flexor at 30°/sec angular velocity, right invertor at 30°/sec angular velocity and left invertor at 120°/sec angular velocity. In conclusion, ballet dance training may lead to improve in anatomical stability of ankle and to increase isokinetic muscle strength of ankle resulting in improvement of prorioception.
양기원,김진수,김준호,김장열,박성률,최재혁,Young, Ki-Won,Kim, Jin-Su,Kim, Jun-Ho,Kim, Jang-Yeol,Park, Sung-Ryul,Choi, Jae-Hyuck 대한정형외과스포츠의학회 2006 대한정형외과스포츠의학회지 Vol.5 No.2
서혜부 손상은 축구 손상의 약 10% 정도를 차지하고 있다. 이런 손상은 경기 중 컷팅이나, 사이드 스텝, 가속, 감속, 급격한 방향 전환 등의 긴장력이 서혜부에 가해질 때 발생 할 수 있다. 증상 또한 다양해서, 수일 내에 복귀 할 수도 있으나 동통이 심해져서 운동을 포기해야 할 경우까지 있다. 또한, 어느 한 질환에 국한된 것이 아니기 때문에 서혜부에 동통이 발생할 경우 여러가지 질환을 염두에 두어야 하며, 흔한 손상으로는 서혜부 주변의 근육 및 인대 손상이며 그 외에 신경압박 증상(nerve entrapment), 탈장(hernia), 복부 근육 약화(sportsman's hernia), 치골유합부염(symphysitis), 피로골절 (stress fracure) 및 고관절 질환 등을 들 수 있다. The Incidence of groin injury was about 10% in football player These injuries occur most commonly in athletes participating in sports Involving cutting, quick accelerations and decelerations and sudden directional changes. Symptoms may range from intermittent episodes of mild discomfort to severe and chronic career-ending pain. Groin injuries may result from a variety of causes. We must keep in mind that many other conditions may also affect the groin. Because of the anatomy of the region is so complex. Ligament/muscle strains, nerve entrapment syndromes, sportsman's hernia, symphysitis, stress fractures and various hip pathologies are reviewed as causes of groin pain are reviewed as common causes of groin pain.