• Journal of Digital Convergence
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• v.19 no.2
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• pp.481-488
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• 2021

This study aimed to identify and to compare the difference the changes of one-leg drop landing pattern depending on chronic ankle instability (CAI) among basketball club members. For 30 basketball club members who are currently participating in recreational basketball games in Busan Metropolitan City, 21 CAI groups and 9 CON groups were classified according to the CAI standards provided by the International Ankle Consortium. The one-leg drop landing pattern was measured with the alignment of the lower extremity and joint movement at the initial contact (IC), and the point of peak knee flexion. In addition, the one-leg drop landing pattern was tested with the muscular activity of tibialis anterior, peroneus longus, medial gastrocnemius and gluteus medius at the initial contact (IC), heel contact (HC), and the point of peak knee flexion. The results of this study showed that there was no significant difference in lower limb alignment and lower limb muscular activity among single leg drop landing. These results showed no significant differences in the one leg drop landing pattern and muscular activity depending on CAI. The further studies should classify the types of chronic ankle instability and consider the physical demands and movement characteristics depending on their playing position for providing useful information on prevention of CAI in basketball club members.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.25-26
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• 2014

스마트폰의 폭 넓은 보급으로 인해 스마트폰 시장은 급격한 성장을 이루었고, 모바일 환경의 발전은 다양한 형태의 애플리케이션의 개발과 모바일 게임 시장의 성장으로 이어졌다. 모바일 게임에서 사용자간 상호작용은 중요한 요소가 되었다. 하지만 대부분의 모바일 게임들은 소셜네트워크상의 초대와 아이템의 제공, 스코어 비교 등에 그치는 등 제한된 영역에서의 상호작용에 그치는 경향이 있다. 이에 본 논문에서는 메시지 서버를 활용하여 다수의 모바일 디바이스를 유기적으로 연계, 모바일 디바이스의 화면이나 기능을 확장하고 게임세계와 현실세계의 접목을 통한 새로운 형태의 게임 가능성에 대해 연구하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1079-1082
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• 2000

인터넷에서 호스트의 이동성을 지원해주기 위한 프로토콜인 Mobile IP 의 가장 근 문제점의 하나는 Triangle Routing Problem이며 이를 해결하기 위한 방안으로서 Route Optimization이 있다. 그러나, 이 방식은 Route Optimization 을 위해서 기존의 인터넷 호스트, 즉 Correspondent Node 가 Binding Cache를 유지하고, Encapsulation의 기능을 가져야 하고, Home Agent와 Security Association을 갖도록 변경이 불가피하다. 본 논문에서는 기존 인터넷 호스트에서의 변경을 필요로 하지 않는 새로운 Route Optimization 방안인 Backward-Compatible Route Optimization을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.10a
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• pp.79-83
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• 2001

Network management has become very important issue due to the broad usage of network. However most of network management software are based on unix and very complicated to use. In this paper we address the design and implementation of window-based network management system which can he easily used

• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.230-232
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• 2000

에이전트간의 통신 방법에는 에이전트간 직접 통신을 하는 직접 통신 방법과 다른 매개체를 이용하여 통신하는 간접 통신 방법이 있다. 기존 연구에서의 직접 통신 방식은 에이전트의 위치를 계속하여 추적하고 관리하는 방식으로 동기 통신을 지원하고, 간접 통신 방법은 매개체를 두어서 그를 통한 비동기 통신방법을 지원한다. 하지만, 직접 통신의 경우, 에이전트의 추적과 관리에 따라 오버헤드와 공동 작업에 필요한 멀티캐스팅을 지원하기 어려운 문제점이 있어 이동 에이전트에는 부적합한 통신방법이고, 간접통신의 경우 동기적 상호작용을 지원하기 어렵다. 따라서 본 논문에서는 기존의 간접 통신방법을 확장하여, 멀티캐스팅 기능과 동기 통신 방식을 지원하는 에이전트간의 통신 관리자를 설계한다. 이를 위해서 에이전트의 이벤트 리스너를 통신관리자에 등록을 시켜서 이벤트가 발생할 때마다 해당되는 에이전트에게 전달되도록 하였다. 또한 통신 관리자가 멀티캐스팅 기능을 지원하도록 하였다. 이렇게 함으로써, 공동 작업에서 필요한 신뢰성 있는 동기 통신 방식과 멀티캐스팅 기능을 지원함으로써 이동 에이전트 기반 CSCW 응용개발에 사용할 수 있다.

• Journal of Convergence for Information Technology
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• v.11 no.3
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• pp.250-260
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• 2021

The purpose of this study is to investigate muscle function and symmetry index during whole body vibration exercise using lower extremity training posture for throwing athletes. For throwing athletes in their 20s(6 males, 4 females, age: 24.60±0.92years, height: 177.90±7.40cm, weight: 92.90±22.97kg), lower extremity training postures with squat, carphrase, and lunge movements. Whole body vibration exercise training was performed using. Tensiomyography(TMG) variables Time Delay(Td), Time Contraction(Tc), Time Sustain(Ts) Time Relaxation(Tr), and Displacement Maximumal(Dm) in the lower extremity joint muscles(biceps femoris(BF), gastrocnemius lateral(GL), gastrocnemius medial(GM), rectus femoris(RF), tibialis anterior(TA), lateral vastus(LV), medial latissimus(ML)), were measured to compare and analyze muscle activity, muscle fatigue, and left-right symmetry. The results of the study are left RF, VL, right VM (p<.05) in Td, VM (p<.05) in Tc, GM in Ts (p<.05), left RF in Tr, and right TA (p<. 05) showed a change. Therefore, it has been proven that various whole-body vibration training is an effective exercise with changes in muscle contraction, and stability of the core is secured by symmetry of the left and right muscles. For this reason, the whole body vibration exercise will have a positive effect on rehabilitation training, and it is believed that it will be able to improve performance.

• The Journal of the Korea Contents Association
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• v.9 no.10
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• pp.427-435
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• 2009

The aim of this study was to examine the effect of a brisk walking intervention for 8weeks on isokinetic muscular function factor(strength, power, endurance). The following results were found from the current study: First, Isokinetic muscle function(strength, power, endurance) on $60^{\circ}/sec$ in extension and flexion was significant exercise group and interaction in left knee flexion and right knee extension(P<.00l). Secondly, Isokinetic muscle function(strength, power, endurance) on $120^{\circ}/sec$ in extension and flexion was significant exercise group and interaction in left knee flexion and right knee extension(P<.001). Thirdly, Isokinetic muscle function(strength, power, endurance) on $180^{\circ}/sec$ in extension and flexion was significant exercise group and interaction in left knee flexion and right knee extension(P<.001). Considering the above result of the study the brisk walking had more improvement knee flexor and extensor muscular power. Therefore the brisk walking in the study can be proposed as effective plan to prevention hurt from a sarcopenia and to raise quality in life.

• Journal of Korean Orthopaedic Sports Medicine
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• v.5 no.2
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• pp.110-116
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• 2006

Lesion of the superior glenoid labrum and the insertion of the biceps tendon are a common cause for shoulder pain in patients performing overhead sports. Medial shearing stress during overhead throwing may cause biceps instability and associated rotator cuff problem aggravates the symptoms. Careful attention to the history and physical examination and may arouse suspicion of injury to the biceps tendon and the superior labral complex. Progress in shoulder arthroscopy has led to the identification of the lesion and normal variation. Treatment should be directed according to the type of lesion and related symptoms.

• Journal of Life Science
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• v.33 no.7
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• pp.574-585
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• 2023

Sarcopenia is a leading cause of increased medical and nursing care costs among the elderly. In Korea, preventive measures for sarcopenia are mostly targeted toward the general elderly population without specific diseases. However, it is also necessary to implement measures for elderly individuals living in nursing homes and hospitals, where the prevalence of sarcopenia is high. Currently, computed tomography and/or magnetic resonance imaging are considered standard diagnostic tools. However, their complexity and time-consuming nature make them unsuitable for clinical use. The exact pathophysiological mechanisms of sarcopenia are unclear, as they involve various molecular biological pathways, including decreased exercise, protein and nutrient intake, changes in testosterone and growth hormone, and inflammation. Sarcopenia symptoms can lead to several diseases, such as osteoporosis, fractures, dementia, diabetes, and cardiovascular disease. Vitamin B deficiency is a significant factor in sarcopenia induction, with B vitamins being directly involved in energy and protein metabolism and nerve function. Vitamin B deficiency can lead to neuromuscular and neurogenic disorders, which often overlap with sarcopenia. Suboptimal intake of B vitamins, malabsorption, and anorexia are common among the elderly. This study aims to provide information on the role of water-soluble B vitamins in preventing and controlling muscle mass loss and deterioration among the elderly with sarcopenia. In addition, we discuss the potential of myokines from the B vitamin family in modulating sarcopenia.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.10 no.2
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• pp.107-112
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• 2016

The purpose of this study was to determine the effect of aquatic ramp walking exercise on the activity of the quadriceps, gait and activity of daily living in child with Spinal Muscular Atrophy (SMA) type II. A 5 years-old girl with SMA type II participated in this study. This study used single-subject reverse(A-B-A) design study. There are 12 sessions(4weeks 3 times a week) each during the baseline phase(A), the intervention phase(B), the follow up phase(A). During the baseline phase and the follow up phase performed general aquatic therapy, the intervention phase additional performed walking activity on ramp in pool (60m). Surface electromyogram, Timed Up and Go (TUG) test, ACTIVLIM were used as outcome. During the intervention phase, there were decrease on the activity of the quadriceps. In modified TUG test, gait time reduced during the intervention phase. The ACTIVLIM logit score increased during intervention phase by comparison with the baseline phase. These findings suggest that an aquatic ramp walking exercise activities have the therapeutic possibility on the quadriceps activity and gait ability for child with SMA type II.