• 한국전문물리치료학회지
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• 제27권4호
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• pp.227-232
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• 2020

Background: Hallux valgus (HV) is a foot deformity developed by mediolateral deviation of the first metatarsophalangeal joint. Although various foot-toe orthoses were used to correct the HV angle, verification of the effects of kinetics variables such as ground reaction force (GRF) through three-dimensional (3D) gait analysis according to the various type of orthoses for HV is insufficient. Objects: This study aimed to investigate the effect of soft and hard types of foot and toe orthoses to correct HV deformity on the GRF in individuals with HV using 3D motion analysis system during walking. Methods: Twenty-six subjects participated in the experiment. Participants had HV angle of more than 15° in both feet. Two force platforms were used to obtain 3D GRF data for both feet and a 3D motion capture system with six infrared cameras was used to measure exact stance phase point such as heel strike or toe off period. Total walk trials of each participant were 8 to 10, the walkway length was 6 m. Two-way repeated measures ANOVA was used to determine the effects of each orthosis condition on the various GRF values. Results: The late anteroposterior maximal force and a first vertical peak force of the GRF showed that the hard type orthosis condition significantly increased GRF compared to the other orthosis conditions (p < 0.05). Conclusion: There were significant effects in GRF values when wearing the hard type foot orthosis. However, the hard type foot orthosis was uncomfortable to wear during walking. Therefore, it is necessary to develop a new foot-toe orthosis that can compensate for these disadvantages.

• 제어로봇시스템학회논문지
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• 제8권6호
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• pp.477-483
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• 2002

This paper deals with a workspace analysis of multi-legged walking robots in velocity domain(velocity workspace analysis). Noting that when robots are holding the same object in multiple cooperating robotic arm system the kinematic structure of the system is basically the same with that of a multi-legged walking robot standing on the ground, we invented a way ot applying the technique for multiple arm system to multi-legged walking robot. An important definition of reaction velocity is made and the bounds of velocities achievable by the moving body with multi-legs is derived from the given bounds on the capabilities of actuators of each legs through Jacobian matrix for given robot configuration. After some assumption of hard-foot-condition is adopted as a contact model between feet of robot and the ground, visualization process for the velocity workspace is proposed. Also, a series of application examples will be presented including continuous walking gaits as well as several different stationary posture of legged walking robots, which validate the usefulness of the proposed technique.

• 대한산업공학회지
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• 제38권1호
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• pp.41-45
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• 2012

Until now, most studies of foot moving or driving posture have been performed under laboratory driving conditions. But there are many different things between actual driving conditions and laboratory driving conditions because, in laboratory conditions, it is hard to consider vehicle's noise, vibration and people's psychology state while driving. Thus this study is performed through actual driving conditions. And while driving test, we recorded driver's foots with 2 cameras to investigate foots(left and right) heel point and how human foots move to control the three pedals : accel, brake and footrest.. Through driving test, the results of this study show that the position of driver's heel point isn't related to stature and tends to be generalized.

• 한국운동역학회지
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• 제16권2호
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• pp.75-83
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• 2006

The Purpose of this study was to compare the biomechanical difference of two soccer footwear. which will provide scientific data to coaches and players, to further prevent injuries and to improve each players skills. The result of this study can be summarized after testing the two types of soccer footwear with comparative transforming heel angles and also with a pressure distribution in running. When a player's foot first touched the ground, the average difference of in/eversion was between 1.2 and 3.1 degrees for the two soccer shoes. In regards to maximum inversion and eversion of foot, maximum tibial rotation, and maximum and total movement of foot, the condition of barefoot and the two soccer shoes showed a small difference from 1.5 to 3.5 degrees and the difference among the subjects of study wasn't constant. In regards to maximum velocity of inversion and eversion running in one's bare feet showed much lower inversion velocity in comparison to putting on two types of soccer shoes and comparison of the average. Among some of the subjects, after putting on the two types of soccer shoes exceeded $97^{\circ}/s$ in maximum velocity of eversion. In the maximum braking impulse(t=2774, p<.05) and propulsive impulse for antero-posterior direction, there was a statistically significant difference between the two soccer footwear at running. In the maximum braking force(t=3.270, p<.05) and propulsive force(t=4.956, p<.05) for antero-posterior direction, there was a statistically significant difference between the two soccer footwear at running.

• 대한족부족관절학회지
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• 제20권4호
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• pp.187-191
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• 2016

Arteriovenous malformation (A-V malformation) is defined as an abnormal connection between arteries and veins that lead to A-V shunting with an intervening network of vessels. A-V malformation is a rare condition, and spontaneous regression is also rare. A-V malformation becomes symptomatic when the surrounding tissue and osseous structures are negatively affected. A-V malformation has a high recurrence rate and is relatively hard to treat. In this case, a huge mass with pulsatile and bruit on the medial plantar area were observed. With the diagnosis of A-V malformation in accordance with the results from ultrasonography, magnetic resonance imaging and computed tomography angiography, and mass excision with feeding vessel ligation through plantar midfoot approach was completed successfully.

• 한국산학기술학회논문지
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• 제20권9호
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• pp.20-28
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• 2019

본 논문은 지반 조건에 따라 현재 개발 중인 팽이기초를 접목한 신발과 일반적인 신발인 워킹화의 보행시 압력분포의 비교분석에 대한 연구이다. 일반적인 신발, 현재 개발 중인 팽이기초를 접목한 신발 두 가지 카테고리의 신발이 본 연구에 사용되었으며, 실험 대상은 260mm를 착용하는 정상발의 조건에 만족하는 15명의 20대 남성을 대상으로 단단한 지반, 모래 지반에서의 실험을 실시하였다. 보행 시 압력의 측정은 Techstorm사의 무선 Insole System 을 사용하여 측정하였으며 발의 7 Zone에서 족저압을 측정하였다. 연구 결과 신발과 지반 조건에 따라 다른 최대 힘, 평균 압력, 압력 분포도를 나타냈으며, 본 연구 결과 단단한 지반 및 모래 지반에서 발 부위에 따라 족저압 분산 효과가 일반적인 신발과 현재 개발 중인 팽이기초를 접목한 신발이 서로 상이한 것을 확인할 수 있었다. 향후 보다 지속적인 연구를 통해 다양한 고무 소재를 선택하여 추가적인 실험을 통해 단단한 지반 및 모래 지반에서 모두 착용 가능한 신발의 개발에 유용하게 사용될 것으로 기대된다.

• 대한통합의학회지
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• 제9권4호
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• pp.85-89
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• 2021

Background : Klippel-Trenaunay-Weber syndrome (KTS) is a rare congenital medical condition characterized by complex vascular malformation. KTS consists of a classic triad of capillary malformation (hemangioma), venous malformations and bone or soft tissue hypertrophy causing limb asymmetry. The aim of this report is to describe management for gait disturbance and foot pain in a Patient with KTS using custom-made total contact insole. Case presentation : A 32-year-old man with KTS presented with a 3-year history of gait disturbance on hard surface due to right first toe pain and Achilles tendon tightness. The patient had soft tissue hypertrophy, varicose veins and port-wine stains over the right lower limb associated with KTS. True leg length discrepancy was 2 cm. We prescribed custom-made total contact insole to protect his deformed foot and correct leg length discrepancy. The insole of right side included wedge shaped heel lift and the insole of left side included full length lift to add extra support on unaffected side. Also, we provided compression stocking and physiotherapy including manual lymphatic drainage for lymphedema and stretching exercise for tightness in right lower extremity. At 3 years follow-up, postural alignment including pelvic obliquity was improved using a custom-made total contact insole. The degree of scoliosis and foot pain were also reduced. Conclusion : An individualized and multidisciplinary approach is essential regarding the complexity of comorbidities in patients with KTS. For patients with KTS, orthotic management should be considered to prevent and correct deformities related to KTS. Active orthotic management, compression stocking and physiotherapy can enhance the quality of life and function in patients.

• 사상체질의학회지
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• 제19권1호
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• pp.137-147
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• 2007

1. Objectvies This study is to examine the expected general condition change, clinical distinctive feature about using Ohgapichangchuk-Tang and Mihooteungshikchang-Tang and the range of using them based on the patient taken care by Taeyangin herb-medicines. 2. Methods We had observed 20 patients who visited Sasang Constitutional medical department in Dongguk Univ. oriental medical hospital from October 2003 to October 2006, diagnosed as Taeyangin and took Taeyangin herb-medicines more than twice. 3. Results and Conclusions 1) The chief complains of Taeyangins were 5 skin problem, 5 rhinitis, 2 digestion problem, 2 neurological problem, 3 fatigue ${\cdot}$ general weakness, 2 hand and foot hyperhidosis, 2 chest pain and discomfort, 2 genecological problem, 1 halitosis. Ohgapichangchuk-Tang was used for 4 rhinitis, 2 atopy, 1 fatigue, 1 halitosis. Mihooteungshikchang-Tang was used for 3 skin problem, 2 digestion problem, 2 neurological problem like dizziness or dysphagia ${\cdot}$ dysarthria, 2 hand and foot hyperhidosis, 2 chest pain and discomfort and 2 genecological problem. 2) The meaningful part after using Ohgapichangchuk-Tang and Mihooteungshikchang-Tang is 'dyspepsia', 'insomnia', 'dyspnea', 'dry skin' and 'sialosis'. It is necessary to check the general symptom. 3) Taeyangin used to have hard stool and not to sweat. 4) Ohgapichangchuk-Tang seemed to be used when there is digestion problem comparing with Mihooteungshikchang-Tang however it is not significant differences. 5) We require further examination to study Taeyangin's prescriptions.

• 소음진동
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• 제8권1호
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• pp.146-156
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• 1998

자동차의 폭발적인 증가와 아울러 경부고속전철시대를 맞이함으로 인하여 소음공해는 큰 사회적 문제로 대두되고 있다. 본 연구는 이러한 소음공해에 대한 해결책의 일환으로 효율적인 방음벽을 연구 하는데 그 목적이 있다. 방음벽의 연구는 먼저 반사형 방음벽과 흡음형 방음벽에 대한 소음저감효과 를 산정한 다음, 흡음재료를 사용함으로서 감소되는 소음저감 효과를 산정하는데 큰 의의가 있다. 본 연구결과에 의하면 방음벽의 높이에 비하여 음의 파장이 대체로 짧을 때는 방음벽의 상단부분에 흡음재를 설치하면 방음벽 전체에 흡음재를 설치한 것과 같은 효과가 있다는 결론을 얻었다. 도로교통소음은 평균주파수가 550Hz 이므로 이때 파장은 60cm 정도이다. 방음벽 높이를 4m로 설치했을 때 방음벽 상단에서 60cm 정도만 흡음재를 사용하면 4m전체의 방음벽에 흡음재를 사용한 것과 같은 효과가 있는 것으로 나타났다. 흡음재를 사용한 소음저감의 효과는 점음원이고 수음자의 위치가 $135^{\circ}$ 일 때 평균 8dB(A)정도이고, 선음원일때는 평균 3dB(A)정도의 효과가 있는 것으로 나타났다 이러한 흡음형의 방음벽은 경제적일 뿐만 아니라 방음벽의 높이를 최소한 1m이상 줄일 수 있으므로 국토를 고도로 이용해야 되는 우리 나라의 여건에 대단히 효과적인 방음벽이라 사료된다.