• The Journal of Korean Physical Therapy
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• 제22권4호
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• pp.7-14
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• 2010

Purpose: The goal of this study was to investigate the effect of balance and gait ability through two motor dual task training in chronic stroke subjects. Methods: A group of twenty-five subjects who were six months post stroke participated in this study, where they were designated into pretest-posttest control The subjects were randomly allocated into two groups: experimental (n=13) and control (n=12). Both groups received physical therapy for 5 session 30 minutes per week during 6 weeks. Experimental group practiced additional two motor dual task training programs for thirty minutes a day, three days a week during six weeks. Evaluation of results was obtained through analyzing static balance, dynamic balance and gait function. Results: There was significant improvement among the group that practiced the additional two motor dual task training in that the postural sway area with open eye and close eye on the foam surface, the dynamic balance (p<0.05), and the gait function (p<0.05). Conclusion: Two motor dual task training improved static balance on the foam, dynamic balance, gait function. These results suggest that two motor dual task training is a feasible and suitable treatment for individuals with chronic stroke.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 춘계학술대회
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• pp.580-583
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• 2018

본 연구는 지지면에 따른 발목균형훈련이 비만중년여성의 고유수용성감각, 균형 및 근력 미치는 영향을 알아보고자 하였다. 연구에 동의한 중년여성 30명중 불안정한 지지면에서 훈련을 시행한 실험군I의 15명과 안정 지지면에서 훈련을 시행한 실험군II의 15명에게 총 6주간 매회 30분씩 훈련하였다. 훈련효과를 알아보기 위해 훈련 전 고유수용성은 Dualer IQ 디지털 경사계로 검사를 시행하였고 균형은 BT4로 검사하고 근력은 도수근력검사기로 검사를 하고 훈련 후 다시 재측정하였다. 이에 실험군I,II 모두 고유수용, 균형, 근력검사에서 유의한 차이를 보였다. 이에 불안정한 지지면과 안정된 지지면에서의 발목균형운동은 비만중년여성의 고유수용성, 균형, 근력이 향상되는 프로그램이다.

• 한국전문물리치료학회지
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• 제19권3호
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• pp.61-71
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• 2012

In daily activities, people often perform two or more tasks simultaneously. This is referred to as dual-tasking or multi-tasking. The purpose of this study was to examine the effects of performing dual tasks while using a mobile phone on static and dynamic postural stability. Twenty-four subjects were asked to stand on a force plate and then instructed to perform a balance task only (BT), a balance task while listening to music (BTL), a balance task while talking on the mobile phone (BTT), and a balance task while sending text messages (BTS). We used the BioRescue$^{(R)}$ to measure postural sway and limit of stability for static and dynamic postural stability. Also the star excursion balance test (SEBT) was used to measure dynamic postural stability. A one-way ANOVA with repeated measures was used to compare the effects of the BT, BTL, BTT, and BTS. The Bonferroni's post hoc test was used to determine the differences among four tasks. Carrying out the BTS significantly decreased the limit of stability compared with carrying out the BT, BTL, and BTT (p<.05). In limit of stability, total surface area of BTT was more significantly decreased than that of BT and total surface area of BTS was more decreased than that of BT, BTL and BTT (p<.05). In the SEBT, the BTS displayed significantly smaller reach distance values compared with the BT or BTL (p<.05). These findings suggest that performing the balance task while sending text message on the mobile phone decreases dynamic postural stability, whereas performing the same task while listening to music using the mobile phone does not. Therefore, it requires more attention to maintain dynamic balance while sending text messages.

• 대한통합의학회지
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• 제7권1호
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• pp.1-8
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• 2019

Purpose : The purpose of this study was to examine the correlation between static and dynamic balance according to the virtual reality-based squat and conventional squat exercise. Methods : Twenty four participants were randomly assigned to the virtual reality-based squat (VRS) group (n=12) or conventional squat (CS) group (n=12). The static balance (C90 area, C90 angle, trace length, sway average velocity) and dynamic balance (forward, rearward, leftward, rightward) were measured using a force plate by BT4. The VRS group used the virtual reality system during 4 weeks, while the CS group underwent classical squat training. Independent t-test was used to test the homogeneity of the general characteristics of the subjects. The collected data was analyzed using the paired t-test for static and dynamic balance comparisons before and after exercise in both groups and Pearson's test for the correlation between static and dynamic balance according to the measured time. The significance level was set to 0.05. Results : There was no significant correlation between group and static and dynamic balance related variables (p>.05). There was a significant correlation between measurement time and static and dynamic balance related variables (p<.05). According to the measurement time, the static balance parameter C90 area in the VRS group after exercise was significantly decreased (p<.05). The values of forward, leftward and rightward in the VRS group were significantly increased after exercise (p<.05). Conclusion : It is suggested that 20 normal healthy adult men and women who have normal balance ability can improve their ability to control their posture by improving the balance ability when applying virtual reality-based squat exercise.

• 한국의사학회지
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• 제24권1호
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• pp.57-62
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• 2011

With the discovery of WooJam JabJeo, Jang-Taegyung[1809~1887] was highlighted as a noted doctor who won fame in the neighborhood of Gwangju, but with 'WoodJam Mango' seeing the light of day, this study was able to confirm the appearance of a literary man enjoying a reputation enough to sway literary circles with his writing of poems. It's possible to confirm his past related to medical service only until age of 42, which is because description in "WooJam JabJeo" came to a halt there. The situation is that the contents of 'WooJam Mango' started from age of 46 and were carried on even until after his death by his followers. Therefore, there exists a very intense impression that he might have put a focus on the life as a literary man ever after his mid-40s. and considering that he breathed his last at the age of 79, it's not difficult for us to estimate that his life was predominantly a series of literary activities rather than a health care provider. The place names appearing in "WooJam JabJeo" and "WooJam Mango" are limited to today's Jeonlanam-do, and this researcher would say that the through-composed poems, which sang of the beauty of Gwangju area scenery are the works, deserve to get a spotlight in local history even today. Through the above discussion, this study could prove that WooJam is a flawless figure enough to represent Gwangju and Jeonlanam-do as a health care provider and a literary person as well.

• Safety and Health at Work
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• 제6권3호
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• pp.206-210
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• 2015

Background: Fatigue has a strong impact on workers' performance and safety, but expedient methods for assessing fatigue on the job are not yet available. Studies discuss posturography as an indicator of fatigue, but further evidence for its use in the workplace is needed. The purpose of the study is to examine whether posturography is a suitable indicator of fatigue in clerical workers. Methods: Thirty-six employees (${\emptyset}$ 34.8 years, standard deviation = 12.5) participated in postural tasks (eyes open, eyes closed, arm swinging, and dual task) in the morning and afternoon. Position of their center of pressure (COP) was registered using a Nintendo Wii Balance Board and commercial software. From registered COP time series, we calculated the following parameters: path length (mm), velocity (mm/s), anterior-posterior variance (mm), mediolateral variance (mm), and confidence area ($mm^2$). These parameters were reduced to two orthogonal factors in a factor analysis with varimax rotation. Results: Statistical analysis of the first factor (path length and velocity) showed a significant effect of time of day: COP moved along a shorter path at a lower velocity in the afternoon compared with that in the morning. There also was a significant effect of task, but no significant interaction. Conclusion: Data suggest that postural stability of clerical workers was comparable in the morning and afternoon, but COP movement was greater in the morning. Within the framework of dynamic systems theory, this could indicate that the postural system explored the state space in more detail, and thus was more ready to respond to unexpected perturbations in the morning.

• 동력기계공학회지
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• 제12권6호
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• pp.42-49
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• 2008

The most important job in the container terminal area is to handle the cargo effectively in the limited time. To achieve this object, many strategies have been introduced and applied to. If we consider the automated container terminal, it is necessary that the cargo handling equipments are equipped with more intelligent control systems. From the middle of the 1990's, an automated rail-mounted gantry crane(RMGC) and rubber-tired gantry crane(RTG) have been developed and widely used to handle containers in the yards. Recently, in these cranes, the many equipments like CCD cameras and sensors are mounted to cope with the automated terminal environment. In this paper, we try to support the development of more intelligent automated cranes which make the cargo handling be performed effectively in the yards. For this plant, the modelling, tracking control, anti-sway system design, skew motion suppressing and complicated motion control and suppressing problems must be considered. Especially, in this paper, the system modelling and tracking control approach are discussed. And, we design the tracking control system incorporating an observer based on the 2DOF servo system design approach to obtain the desired state informations. In the case of observer design, a weighted $H_{\infty}$ error bound approach for a state estimator is considered. Based on an algebraic Riccati equation(inequality) approach, a necessary and sufficient condition for the existence of a full-order estimator which satisfies the weighted $H_{\infty}$ error bound is introduced. Where, the condition for existence of the estimator is denoted by a Linear Matrix Inequality(LMI) which gives an optimized solution and observer gain. Based on this result, we apply it to the tracking control system design for the transfer crane.

• 한국환경과학회지
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• 제4권4호
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• pp.1-1
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• 1995

본연구는 일본 국립공원제도의 역사를 정책과 행정적측면을 중심으로 재평가 하였다. 일반적 인식과는 달리 일본의 국립공원제도는 보호와 개발을 적적히 조화시케는데 성공적이지 못하였고 이의 근본적 원인은 다음과 같이 요약된다. 일본의 국립공원제도는 크게 경제적 근거로 수립되어 전개되어 왔고 특히 경제캐발정책의 지배적 영향에 의해 좌우되어 왔으며 보호와 개발에 관한 정부 부터간의 정책적 및 행정적 조정이 수행되지 못하였다. 또한 국립공원 정책과 행정에 관한 의하결정의 폐쇠성은 주민참여와 환경단체의 영향력을 곡도로 제한하였고 국립공원의 대중적 인식도 유일한 국가유산보다는 오히려 유명관광지로 상징되어 엄격한 보호를 위한 대중적 지지력도 상당히 결여 되어왔다. 따라서, 관광개발 이득의 주된목적은 보호의 환경적 가치와 목적에 우선해 왔고 이는 오늘날까지 큰 변화없이 지속되고 있다. 이러한 일본의 실패경험과 교훈은 근본적인 평가없이 일본의 모델을 기본적으로 그대로 수용해 온 우리나라의 국립공원제도에 시사하는 바가 매우 크다. 우리의 영원한 국가적 환경유산을 구하기 위해서는 국립공원제도의 고감하고도 근본적인 개혁이 시급히 필요한 것으로 생각된다.

• 한국환경과학회지
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• 제4권4호
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• pp.303-315
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• 1995

본연구는 일본 국립공원제도의 역사를 정책과 행정적측면을 중심으로 재평가 하였다. 일반적 인식과는 달리 일본의 국립공원제도는 보호와 개발을 적적히 조화시케는데 성공적이지 못하였고 이의 근본적 원인은 다음과 같이 요약된다. 일본의 국립공원제도는 크게 경제적 근거로 수립되어 전개되어 왔고 특히 경제캐발정책의 지배적 영향에 의해 좌우되어 왔으며 보호와 개발에 관한 정부 부터간의 정책적 및 행정적 조정이 수행되지 못하였다. 또한 국립공원 정책과 행정에 관한 의하결정의 폐쇠성은 주민참여와 환경단체의 영향력을 곡도로 제한하였고 국립공원의 대중적 인식도 유일한 국가유산보다는 오히려 유명관광지로 상징되어 엄격한 보호를 위한 대중적 지지력도 상당히 결여 되어왔다. 따라서, 관광개발 이득의 주된목적은 보호의 환경적 가치와 목적에 우선해 왔고 이는 오늘날까지 큰 변화없이 지속되고 있다. 이러한 일본의 실패경험과 교훈은 근본적인 평가없이 일본의 모델을 기본적으로 그대로 수용해 온 우리나라의 국립공원제도에 시사하는 바가 매우 크다. 우리의 영원한 국가적 환경유산을 구하기 위해서는 국립공원제도의 고감하고도 근본적인 개혁이 시급히 필요한 것으로 생각된다.

• Physical Therapy Rehabilitation Science
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• 제3권2호
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• pp.125-133
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• 2014

Objective: The aim of this study is to investigate the effect of patellar taping on balance and gait abilities in chronic stroke patients. Design: Randomized placebo-controlled trial. Methods: Thirty chronic stroke patients who have been diagnosed at least six months or before were recruited from R hospital. These study subjects were randomized to the experimental group (n=15) or placebo group (n=15). In the experimental group, patellar taping was applied while for the placebo group, placebo taping was applied. The Balance System SD was used for measuring dynamic standing balance in these two groups. In addition, the GAITRite (CIR System Inc.) system was utilized for calculating gait performance in these patients. Results: After application of taping, the patellar taping group showed a significant decrease in dynamic standing balance in their sway area (p<0.05). However, in the placebo group, there was no significant difference in dynamic standing balance ability and gait ability before and after application of taping. Comparison of the patellar taping group and placebo group showed significant differences in dynamic standing balance ability and gait performance (p<0.05). Conclusions: From the results of this study, it appears that application of patellar taping in chronic stroke patients significantly improved dynamic standing balance ability and gait ability in these patients. Based on these results, patellar taping is thought to be useful in real clinical settings where there are many chronic patients who are in need of improvement in their balance and gait ability.