• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.25 no.1
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• pp.37-43
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• 2019

Background: This study was conducted to investigate the effects of obstacles gait on balance and fall-efficacy in patients who underwent total knee arthroplasty. Methods: The 24 subjects of this study were recruited from individuals diagnoses with degenerative arthritis who had undergone total knee arthroplasty. The 24 patients were randomly divided into a control groups and experimental groups, obstacles gait exercise was conducted for 4 weeks three exercises. Balance and falls-efficacy were measured to compare the effects of the exercises. Results: The results of the balance ability and falls-efficacy showed that the experimental group showed significantly enhanced results than the control group(p<.05). Conclusions: Based on these results, Obstacles gait exercise effectively improves the recovery of patients with total knee arthroplasty.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.6
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• pp.666-671
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• 2019

The flight controller(FC) used in small-sized drone was developed as simple structure does not perform complex operations because it uses different MCU with large-sized drone. Also, the balance control of small-sized drone should be simpler than Kalman filter using complex filter and the method using Complementary filter has relatively more operations. So, the method to realize the balance control on small-sized drone effectively using two-track control operating as proper method for above is suggested in this research. This method is a system maintaining effective balance with simple structure and less operations by operating adaptively for the unbalance of the drone with the acceleration sensor with the advantage which performing accurate correction by data processing for long term change and gyroscope sensor maintaining the balance of the drone by data processing for short term change. It is confirmed that stable operation was performed mostly based on the test result for repeatable test more than 100 times using two-track control and it maintained normal state operation more than 98% excluding the difficulty of maintaining normal operation when meets sudden and rapid wind yet.

• Physical Therapy Korea
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• v.24 no.2
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• pp.58-65
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• 2017

Background: Children with cerebral palsy (CP) have impaired postural control, but critically require the control of stability. Consequently, therapeutic interventions for enhancing postural control in children with CP have undergone extensive research. One intervention is sensorimotor training (SMT) using a Flexi-bar, but this has not previously been studied with respect to targeting trunk control in children with CP. Objects: This study was conducted to determine the effect of SMT using a Flexi-bar on postural balance and gait performance in children with CP. Methods: Three children with ambulatory spastic diplegia (SD) participated in the SMT program by using a Flexi-bar for forty minutes per day, three times a week, for six weeks. Outcome variables included the pediatric balance scale (PBS), trunk control movement scale (TCMS), 10 meter walking test (10MWT), and 3-dimensional movement coordination measurement. Results: The SMT provided no statistically significant improvement in PBS, TCMS, 10MWT, or 3-dimensional movement coordination measurement. However, positive changes were observed in individual outcomes, as balance and trunk control movement were improved. Conclusion: SMT using a Flexi-bar may be considered by clinicians as a potential intervention for increasing postural balance and performance in children with SD. Future studies are necessary to confirm the efficacy of Flexi-bar exercise in improving the functional activity of subjects with SD.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.462-465
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• 2002

In this treatise, we developed a balance grinding appointment main axis of auto balancing that can control all vibrancy components and instability of cutting area, disturbance etc.. including high speed unbalance quantities more than 6,000 rpm on the basis of estimate control technology that consider grinding mechanism to purpose balancing on the of machine.

• Journal of Institute of Control, Robotics and Systems
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• v.21 no.4
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• pp.301-308
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• 2015

In this paper, we propose an LTBC (Low Tension and Load Balance Control) scheme to improve a coiling shape control by reduction the tension fluctuation by the torque disturbance in the down coiler process of hot strip mills. The proposed controller is a combination of an LTC to control the overload at load-on in the mandrel and an LBC to regulate the load balance of the upper and bottom pinch roll. A tension calculation model is suggested with the concept of the tension deviation. The effectiveness of the proposed control scheme is verified from simulation under a disturbance of the pinch roll torque. Using a field test, we show that the performance of the shape and tension control is improved by the LTBC control.

• The Journal of the Korea Contents Association
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• v.10 no.9
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• pp.285-292
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• 2010

The purpose of this study is to investigate the effect of 8 direction incline and rotation exercise on pain and dynamic balance in the patients with chronic low back pain(CLBP). 20 patients who were diagnosed with CLBP were included for the study. 10 patients(experimental group) were treated by modality{Hot Pack(H/P), Transcutaneous Electric Nerve Stimulation(TENS), Ultra Sound(U/S)} and then performed 8 direction incline and rotation exercise. The other 10 patients(control group) were only treated by modality. The therapeutic intervention was taken three times a week for 6 weeks. Dynamic balance was assessed by Star Excursion Balance Test(SEBT) and pain was assessed by Visual Analog Scale(VAS). VAS scores of both groups were decreased. However, the experimental group was more significantly decreased than the control group. The dynamic balance of both groups was significantly increased in anterior, posterior, medial, lateral direction. But experimental group was more significantly increased than the control group. In conclusion, 8 direction incline and rotation exercise was effective on pain and dynamic balance in CLPB.

• The Journal of Korean Physical Therapy
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• v.25 no.5
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• pp.360-365
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• 2013

Purpose: The purpose of study was to investigate effects of dance sports in virtual reality on balance, depression, and activities of daily living (ADL) in stroke patients. Methods: Subjects of the research consisted of 18 stroke patients who were randomly divided into the experimental and control groups, with nine patients each. All subjects underwent 30 minutes of Neurodevelopmental treatment (NDT) and 15 minutes of Functional electrical stimulation (FES) five days per week for a period of six weeks. Subjects in the experimental group performed an extra 30 minutes of dance sports in virtual reality each day. Balance, depression, and ADL of patients before and after the experiment were measured using Berg's balance scale (BBS), Beck depression inventory (BDI), and Modified Barthel index (MBI), respectively. For comparisone of the state before and after the experiment, wilcoxon signed ranks test was applied and for comparison of the difference between the groups, mannn-whitney U test was applied. Results: Results of this study, showed significant difference in balance, depression, and ADL between the experimental and control groups(p<0.05). As a control of the two groups, the experimental group, which performed extra dance sports in virtual reality, showed a significant difference in balance, depression, and ADL(p<0.05). Conclusion: Depending on the result, a dance sport in virtual reality was verified to enhance balance, depression, and ADL in stroke patients. Therefore, from now on, need for effective program development and application using dance sports in virtual reality will arise.

• Journal of the Korean Society of Physical Medicine
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• v.12 no.4
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• pp.93-103
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• 2017

PURPOSE: This study aimed to determine the effect of active trunk training in the sitting position on balance and energy consumption in early stroke patients. METHODS: The subjects of this study were twenty four early stroke patients were recruited and randomly divided into two groups; experimental group (n=12) and control group (n=12). The subjects in the experimental group participated in active trunk training (20 min) and conventional physical therapy (20 min) five times a week for four weeks. The control group conducted general balance exercise (20 min) and conventional physical therapy (20 min) five times a week for four weeks. The outcomes were assessed using the Berg balance scale, Timed up and go test and energy cost and physiological cost index. RESULTS: Both groups showed a significant increase in their Berg balance scale and significant decrease in their Timed up and go test score, and energy cost and physiological cost index (p<.05). Compared to the control group, the experimental group experienced a greater increase in the Berg balance scale (p<.05) and a larger decrease in the timed up and go test score, and energy cost and physiological cost index (p<.05). CONCLUSION: We suggest that active trunk training in the sitting position may be effective in improving balance and energy consumption in early stroke patients. Thus, active trunk training is important for such patients. Further studies are needed to better understand the effectiveness of trunk training in early stroke patients.

• Physical Therapy Rehabilitation Science
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• v.4 no.2
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• pp.66-72
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• 2015

Objective: The aim of this study was to investigate the effect of balance training with plantar flexor stretching on ankle dorsi flexion range of motion (ROM), balance, and gait ability in stroke patients. Design: A randomized controlled pilot trial. Methods: Thirty stroke patients volunteered to participate in this study. The subjects were randomly allocated to two groups: the experimental group (n=15) received the neurodevelopment therapy plus balance training with plantar flexor stretching for 20 minutes in one session. The control group (n=15) received the same neurodevelopment therapy plus plantar flexor static stretching for 20 minutes in one session. Both groups underwent sessions four times a week, for a total of 4 weeks. Measurements included passive range of motion (PROM), active range of motion (AROM) of ankle dorsiflexion using a goniometer, timed up and go (TUG), the functional reaching test (FRT), and the 10 m walk test (10 MWT). Results: There were significant improvements in AROM and PROM of ankle dorsiflexion, TUG, and FRT scores after the intervention in the experimental group (p<0.05). However, the control group showed no statistically significant differences except for PROM of ankle dorsiflexion. The experimental group showed a significant improvement in PROM, TUG, and FRT scores compared to the control group (p<0.05). Conclusions: Balance training with plantar flexor stretching improves ankle dorsiflexion ROM and balance ability in patients with stroke. Therefore, this therapeutic intervention will be effective for rehabilitation of stroke patients in the clinical setting.

• Physical Therapy Rehabilitation Science
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• v.6 no.2
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• pp.53-58
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• 2017

Objective: The purpose of this study was to determine the effect of upper extremity coordination exercise (UECE) during standing on the paretic side on balance, gait ability and activities of daily living (ADL) in persons with stroke. Design: A randomized controlled trial. Methods: A total of 27 patients with hemiplegic diagnosis after stroke were divided into two groups. Fourteen patients were in the study group and 13 patients were in the control group. The study group received conventional physical therapy and UECE during standing on the paretic side. The control group received conventional physical therapy and simple upper extremity exercise (SUEE). Subjects in both groups were given upper extremity training for 30 minutes per day, five times a week for 4 weeks. Initial evaluation was performed before treatment and reevaluated 4 weeks later to compare the changes of balance, gait ability and ADL (Korean version of modified Barthel index, K-MBI). Results: Both groups showed a significant effect for balance, gait ability and ADL (p<0.05). In the Independent t-test, between both groups showed a significant effect for balance and gait ability except ADL (p<0.05). Conclusions: In this paper, we investigated the changes in balance, walking, and ADL through UECE. We found significant changes in the study group and the control group. Results of the present study indicated that UECE during standing on the paretic side for 4 weeks had an effect on balance, gait ability and ADL (K-MBI) in persons with hemiplegia after stroke.