• The Journal of Korean Physical Therapy
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• 제27권2호
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• pp.124-127
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• 2015

Purpose: The emphasis on gait rehabilitation after stroke depends on training support through the lower limbs, balance of body mass over the changing base of support. However, muscle weakness, lack of control of lower limb, and poor balance can interfere with training after stroke. For this case study report, a wearable robot orthosis was applied to stroke patients in order to verify its actual applicability on balance and gait ability in the clinical field. Methods: Two stroke patients participated in the training using the wearable robot orthosis. Wearable robot orthosis provides patient-initiated active assistance contraction during training. Training includes weight shift training, standing up and sitting down, ground walking, and stair up and down Training was applied a total of 20 times, five times a week for 4 weeks, for 30 minutes a day. Gait ability was determined by Stance phase symmetry profile, Swing phase symmetry profile, and velocity using the GAITRite system. Balance ability was measured using the Biodex balance system. Results: Subjects 1, 2 showed improved gait and balance ability with mean individual improvement of 72.4% for velocity, 19.4% for stance phase symmetry profile, 9.6% for swing phase symmetry profile, and 13.6% for balance ability. Conclusion: Training utilizing a wearable robot orthosis can be useful for improvement of the gait and balance ability of stroke patients.

• 한국운동역학회지
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• 제26권4호
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• pp.383-390
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• 2016

Objective: Gymnastics on rings needs a high level of muscle strength with balance ability for controlling the body. A study on a new balance training program is necessary for elite gymnasts. Therefore, the purpose of this study was to investigate the effects of an 8-week pilates core-muscle training on balance ability and asymmetry index of the L-sit on the rings in male elite gymnasts. Method: Ten elite gymnasts (age: $20.6{\pm}0.7years$, height: $169.9{\pm}4.9cm$, weight: $65.4{\pm}5.6kg$, career duration: $20.6{\pm}0.7years$), who are students at K-university, participated in this study. Results: First, the range of the COM tended to decrease in the anterior-posterior direction. Second, the left hip joint angle and knee extension and ankle dorsiflexion angles significantly increased after the pilates training. Third, the ROM also increased. Fourth, the symmetry value increased in the hip angle, while the symmetry index in all joints of the ROM decreased. As a result, the pilates core-muscle training influenced the static balance ability during the L-sit on the rings. Conclusion: Accordingly, the pilates core-muscle training is suitable in enhancing the basic balance ability in gymnastics on rings.

• 한국운동역학회지
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• 제24권4호
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• pp.391-397
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• 2014

The purpose of this work is to biomechanically study the effect of the one leg standing pose in yoga.. The work have been done through the evaluation for the left and right symmetry ability of one leg standing pose in the before and after yoga training for the 14 female yoga subject group (height: $164.3{\pm}4.4cm$, mass: $53.4{\pm}6.4kg$, year: $20.0{\pm}0.49yrs$) participated in this experiment. The motions of one leg standing pose were captured with Vicon system and the parameters were calculated with Visual-3D and Ground reaction force system. The results were as followed; - Front and backward COPsd did not show the significant difference, compared the before training with the after. - Left and right COPsd showed the significant difference (p<0.05), compared the before training with the after. - COP distance showed the significant difference (p<0.01), compared the before training with the after. - The asymmetry index of front and backward COPsd did not show the significant difference, compared the before training with the after. - The asymmetry index of left and right COPsd did not show the significant difference, compared the before training with the after. - The asymmetry index of COP distance showed the significant difference (p<0.01), compared the before training with the after. Therefore, the yoga training demonstrated the stable improvement in the one leg standing pose of inferior feet and the positive effect to the left and right symmetry ability.

• 한국의류산업학회지
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• 제10권3호
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• pp.364-370
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• 2008

This research aims to recognize necessity of modern expression of traditional pattern, understand the matter which is expressed when developing design using traditional pattern, and find the solutions. As the solutions, this research presents design of traditional pattern using symmetry concept and works on the possibility of symmetry as the pattern design. So this research carried out in-depth interview to textile designer working at Gyeongsangnam-do, analyzed the substances. The main results are as follows. First, the presented problems of developing common pattern design and designing using traditional pattern show the necessities for adequate harmony among conception of creative idea, traditional pattern and present pattern. As the solution, the efficient design principles are required. Second, the seven traditional figures can present design applying symmetry, also draw the 8 mapping models for the visuality and utilization. Third, the symmetry-applied traditional pattern design makes it possible for the traditional figure to be represented with the creative and modern sense and provides easier way to the design development by complementing the pattern design formation. As the result, symmetry-utilized traditional pattern design improvement shows the expectation that it will increase the design development ability and ease the figure drawing. In addition, the pattern development which can be applied to any figure presents the time efficiency as well as possibility of the high added value textile industry.

• 대한물리의학회지
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• 제19권1호
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• pp.155-164
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• 2024

PURPOSE: The purpose of this study was to evaluate the effects of simultaneous application of gaze stabilization exercise and cognitive training on the balance and gait ability in subacute stroke patients. METHODS: Thirty-five patients diagnosed with stroke within 3-6 months were randomly assigned, and the experimental group (n = 18) to which both gaze stabilization exercise and cognitive training were applied and the control group (n = 17) to which only gaze stabilization exercise was applied were targeted. It was performed for 30 minutes at a time, three times a week, for a total of 4 weeks. Berg Balance Scale, Timed Up and Go test, 10Meter Walking Test, and Walking symmetry were evaluated. RESULTS: In the comparison of changes between Berg Balance Scale, Time Up and Go test, 10 Meter Walking Test, and Gait symmetry, both experimental and control groups showed significant differences before and after the intervention, and in the evaluation of Gait symmetry, significant differences between groups. CONCLUSION: As a result of this study, when gaze stabilization exercise and cognitive training were allied simultaneously, it was possible to improve the balance and gait ability of subacute stroke patients, and had a more significant effect on gait ability. In considered that training that simultaneously applies gaze stabilization exercise and cognitive training can be presented as a balance and gait rehabilitation for stroke patients on the future.

• 대한수의학회지
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• 제53권4호
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• pp.207-210
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• 2013

Fifteen dry dentate and complete mandible samples from the White Rasquera goat breed were studied for symmetry. Thirty-one landmarks were digitally located on the images of the lateral and medial aspects of each hemimandible. Distances between these landmarks allowed the evaluation of the whole hemimandible and also the neural mandible. In the studied samples, the mandible was rather symmetrical, especially in the medial neural part, and in general, there was no side dominance. Only the diastema differed significantly between the sides, and this was related to the rostral part (incisive arch). The incisive region was the least symmetrical region of the caprine mandible, indicating a modular structure more conservative for the neural part. If unsigned asymmetry is interpreted as a measure of developmental stability, then the studied breed presented a marked ability to develop in good fitness despite the harsh environment. The measurements presented here can also be used as a reference for researchers designing experimental studies, especially on mandibular catch-up growth, and as an aid for zooarchaeologists comparing results from dead animals with those from living goat populations.

• 한국산학기술학회논문지
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• 제22권4호
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• pp.430-440
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• 2021

본 연구는 난청 고령자의 우울정도, 인지기능, 의사소통능력 및 정량뇌파를 분석하고, 관련성을 규명할 목적으로 시도하였다. Y 시 소재의 S 청능재활 센터를 내원한 60세 이상의 난청 고령자 중 모집공고문을 통해 남성 37명, 여성 26명이 2020년 6월 20일부터 2020년 9월 3일까지 자발적으로 참여했다. 구조화된 설문지를 통해 대상자의 전반적인 특성, 우울정도, 인지기능을 평가하였다. 의사소통능력의 척도인 단어인지도는 한국표준 단음절어를 사용하여 진단용 청력검사기로 평가하였다. 정량뇌파는 전전두엽 Fp1과 Fp2에 건식 전극을 사용하여 2채널 뇌파 측정기로 측정하였다. 수집된 자료는 SPSS/WIN 25.0 프로그램으로 인구 사회학적 특성 파악을 위한 빈도분석, 변수간 Pearson's correlation분석, 3분할 집단 간 One-way ANOVA분석을 하였다. 결과를 요약하면 다음과 같다. 의사소통능력은 전전두엽 좌우 대칭성(**p<.01)과 정(+)적 상관관계를 보였고, 우뇌 정신적 산만 및 스트레스(*p<.05)와 부(-)적 상관관계를 보였다. 그러나 우울정도와 인지기능과는 유의한 상관관계는 없었다. 의사소통능력에 따른 3분할 집단별 차이 검정에서도 전전두엽 좌우 대칭성(**p<.01)이 우울정도와 인지능력보다 높은 수준의 상관관계를 보였다. 이상의 결과는 정량뇌파에서 측정된 전전두엽 좌우 대칭성이 난청 고령자의 의사소통능력의 강력한 생체적 지표 가능성을 시사 하였다.

• 한국정보처리학회논문지
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• 제4권12호
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• pp.3063-3068
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• 1997

일반적인 역전파(Back Propagation)의 알고리즘을 다층 다항식 고차 뉴럴네트워크에 적용하여 위치 변환 패턴에 있어 정확한 인식을 할 수 있도록 네트워크의 구조를 개선했다. 본 논문의 목적은 다층 다항식 고차 뉴럴네트워크를 이용하여 여러 가지 패턴 인식이 가능한 이유를 자세히 논한다. 실제 예로는 일정한 문자 인식의 예제로 변형된 영문자 T-C 패턴을 가지고 실험했으며, 네트워크의 일반성(Generalization)을 측정하기 위해서는 거울반사 대칭(Mirror Symmetry)문제를 시뮬레이션 했다. 그 결과 종래의 모델보다 기술적인 우수성을 확인 할 수가 있었다. 본 연구가 제안한 방식에 의한 위치 변환된 T-C 패턴에 대하여서는 90%의 인식율을 얻을 수 있었으며, 일반성의 실험에서 거울반사 대칭(Mirror Symmetry)에 대한 인식율은 70％를 얻었다. 이 실험결과는 종래의 모델에서는 구하기 어려운 인식율이며 기존 연구와 비교한 결과 본 제안 방식의 기술적 우위성을 확연히 판단 할 수 있다.

• The Journal of Korean Physical Therapy
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• 제24권2호
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• pp.73-81
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• 2012

Purpose: The aim of the present study was to measure the standing balance symmetry of stroke patients using a force-plate with computer system, and to investigate the correlation between the standing balance symmetry and that of the walking function in stroke patients. Methods: 48 patients with stroke (34 men, 14 women, $56.8{\pm}11.72$ years old) participated in this study. Static standing balance was evaluated by the weight distribution on the affected and the nonaffected lower limbs, sway path, sway velocity, and sway frequency, which reflected the characteristic of body sway in quiet standing. Dynamic standing balance was evaluated by anteroposterior and mediolateral sway angle, which revealed the limit of stability during voluntary weight displacement. Symmetry index of static standing balance, (SI-SSB) calculated by the ratio of the affected weight distribution for the nonaffected weight distribution, and symmetric index of dynamic standing balance (SI-SDB) by the ratio of the affected sway angle for the nonaffected sway angle. Functional balance assessed by a Berg balance scale (BBS), and the functional walking by 10m walking velocity, as well as the modified motor assessment scale (mMAS). Results: Static balance scales and SI-SSB was the only correlation with BBS (p<0.05). Dynamic balance scales and SI-DSB, not only was correlated with BBS, but also with 10m walking velocity and mMAS (p<0.01). Additionally, there was a significant difference between SI-SSB and that of SI-DSB (p<0.01). Conclusion: The balance and the walking function relate to real life in the stroke showed strong relationships with the dynamic standing balance symmetry in the frontal plane and the ability of anterior voluntary weight displacement in sagittal plane.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제37권2호
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• pp.299-327
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• 2023

본 연구에서는 초등학교 5학년 2학기 '합동과 대칭' 단원을 대상으로 탐구형 소프트웨어를 활용한 수업에서 학생들에게서 나타난 귀납적 추론 능력의 수준과 시각화 구성 요소의 양상이 어떠한지 파악하고자 하였다. 이를 위해 초등학교 5학년 1개 반, 총 19명을 대상으로 탐구형 소프트웨어 중 GeoGebra를 활용한 합동과 대칭 수업을 진행하고 학생들의 활동 결과물을 중심으로 분석하였다. 연구 결과 학생들의 귀납적 추론 능력 수준이 비슷한 수준을 유지하거나 발전되는 형태로 나타났고 학생들이 소프트웨어의 다양한 기능을 활용하여 도형의 새로운 성질을 귀납적으로 추론하는 모습이 나타났다. 또한 시각화 측면에서 학생들이 조건에 맞는 도형을 빠르고 쉽게 그릴 수 있었고 지필 환경과는 다르게 '측정', '대칭' 기능을 활용하여 복잡하면서도 정확히 합동과 대칭인 외적 표상을 변형, 조작하는 모습이 나타났다. 이러한 분석 결과를 바탕으로 도형 영역에서 탐구형 소프트웨어의 활용에 대한 시사점을 도출하였다.