• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.10a
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• pp.1211-1214
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• 2004

High-heeled women have been identified with balance control problems. The purposes of this study were to objectively quantify the displacements and velocities of center-of-pressure (COP) of body during waist pulling and to compare the differences between barefooted and high-heeled situations. We used a waist pulling system which has three different magnitudes to sway the subjects. We found that the kinematic information of barefooted and high-heeled women's COP is very important in understanding the mechanism of postural balance control of women in every-day life. In the high-heeled's case, the displacement of COP increases in 200％ as against bare footed. Also the velocity variation of COP grows three times than the bare footed. COP analysis in postural balance study of high-heeled women is also considered useful in development of the safety systems that prevent high-heeled women from falling

• 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.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.1066-1069
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• 2002

Dynamic postural control varies with the environmental context, specific task and intentions of the subject. In this paper, dynamic postural control against forward-backward perturbations of a platform was estimated using tri-axial accelerometers and a force plate. Ten young healthy volunteers stood upright in comfortable condition on the perturbation system which was controlled by an AC servo motor. With anterior-posterior perturbations, movements of ankle, knee and hip Joints were obtained by tri-axial accelerometers. and ground reaction forces with corresponding displacements of the center of pressure(CoP) by the force plate. The result showed that the ankle moved first and the trunk forward, which implies that the mechanism of the dynamic postural control in forward-backward perturbations, occurred in the procedure of the ankle, the knee and the hip. Knee flexion and hip extension in the period of acceleration, constant velocity and deceleration phase is very important fur the balance recovery. These responses depends on the magnitude and timing of the perturbation. From the present study the accelerometry-system appears to be a promising tool for understanding kinematic accelerative In response to a transient platform perturbation. A more through understanding of balance recovery mechanism may aid in designing methods for reducing falls and the resulting injuries.

• Journal of Korean Physical Therapy Science
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• v.18 no.1
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• pp.61-67
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• 2011

Background: The purpose of the present study was to determine correlations between the Berg Balance Scale (BBS), Modified Barthel Index(MBI), Mini-Mental State Examination(MMSE) and Fugl-Meyer motor function Assessment(FMA) in persons with strokes. Methods: We recruited 77 stroke patients from the Seoul Bukbu Geriatric Hospital in Seoul, Korea. Balance was measured by BBS. Activity of Daily Living was assessed using MBI. Cognitive function was examined using MMSE. Motor Recovery was measured using FMA. Data was analyzed using Pearson' correlation. Resurts: There were a statistically significant correlation between BBS and MBI, BBS and MMES, BBS and FMA upper extremity, BBS and FMA lower extremity. There were a statistically significant correlation between MBI and MMSE, MBI and FMA upper extremity, MBI and FMA lower extremity. There were a statistically significant correlated between FMA upper extremity and FMA lower extremity. Conclusions: This study will help rehabilitation program for stroke patients and will be the reference data for selection of therapy and evaluation method.

• Physical Therapy Rehabilitation Science
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• v.11 no.1
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• pp.8-15
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• 2022

Objective: Post stroke motor recovery is facilitated by the brain reorganization or the neuroplastic changes. The therapeutic approach mentioned in the current case is one of the approaches for enhancing motor recovery by stimulating the damaged neural networks directing the motor behaviour of a person. The aim of the present study was to establish the changes in the balance and gait pattern of an individual through multi target stimulation of areas of cerebral cortex by utilising multichannel trans cranial direct current stimulation (M-tDCS) in a sub-acute stroke survivor. Design: A Case Report Methods: The present patient was the participant of the trial (CTRI/2021/02/031044).The patient was intervened with M-tDCS (anodes over left primary motor cortex that is C3 point and left dorsolateral prefrontal cortex i.e., F3 point and cathodes over supraorbital areas, Intensity - 1.2mA) for the duration of 20 minutes along with turbo med extern - an AFO to facilitate ankle dorsi flexion and conventional physiotherapy rehabilitation. The Fugl-Meyer assessment lower extremity (FMA-LE), Berg Balance Scale (BBS), Wisconsin Gait Scale (WGS) and the Stroke Specific Quality of Life (SSQOL) measures were used for outcome assessment. Baseline assessment was done on day 0 followed by assessment on 10 and 20 post intervention. Results: Improvement was seen in all the tools i.e. (FMA -LE), BBS, SSQOL and WGS over the time period of 20 days. Conclusions: M-tDCS resulted in improvement in gait parameters, balance and motor functions of lower extremity of the patient.

• Journal of Korea Society of Waste Management
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• v.35 no.7
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• pp.600-605
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• 2018

In this study, the combustion characteristics were investigated based on the biodrying solid recovered fuel (SRF) in a 5 Ton/day scale combustion boiler. The composition of the combustion gas containing the biodrying SRF was analyzed, the particulate matter, and its HCl content was determined with the air pollutant process test method. Mass balance, carbon balance, and combustion efficiency were calculated according to the equivalence ratio (ER) method; the energy recovery efficiency of the combustion boiler was also analyzed. The overall combustion efficiency of the biodrying SRF was 97.3 % and the energy recovery efficiency was 80.2%.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.25 no.2
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• pp.11-20
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• 2019

Background: The purpose of this study was to investigate the immediate effect of thoracic self mobilization on balance and gait of acute stroke patients. Methods: Patients (n=10) with acute stroke applied to thoracic self mobilization. There are two thoracic self mobilization of both extension and rotation. Each thoracic self mobilization was performed ten times per direction in a total of three sets and the total time required for two thoracic self mobilization was twenty minutes. The break time between sets was one minute. Balance ability was measured using the timed up and go test and the five times sit to stand test for patients. The 10 meter walk test and the functional gait assessment were used for measurement of gait ability for patients. Results: Significant improvements were observed on balance ability (p<.05) and gait ability (p<.05). Conclusion: These results show that thoracic self mobilization is immediate effective on balance and gait ability. Thus, thoracic self mobilization will help recovery of balance and gait ability in acute stroke patients.

• Physical Therapy Rehabilitation Science
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• v.11 no.4
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• pp.517-525
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• 2022

Objective: The rehabilitation protocols for functional recovery have been emphasized after total knee arthroplasty, and Pilates is in the spotlight as a safe and easily modified exercise method. The purpose of this study was to investigate the effects of mat Pilates exercise on lower extremity function, postural balance, and walking in the individuals with total knee arthroplasty. Design: One group pretest-posttest design. Methods: Eighteen older women with unilateral total knee arthroplasty was recruited in the study. The subjects were evaluated on lower extremity function, postural balance, and walking before and after mat Pilates exercise. All subject performed one hour mat Pilates exercise, 3 times a week for 8 weeks. Mat Pilates exercises were focused on core stability and lower extremity strengthening and, more dynamic movements were added to increase the difficulty of movements every two weeks. The lower extremity function was measured using the Western Ontario and McMaster Osteoarthritis Index (WOMAC), knee joint position sense, and five times sit-to-stand test. Postural balance was assessed by single leg stance test, functional reach test, and timed up and go test. Walking was measured by OptoGait system to temporospatial parameter. Results: The lower extremity function, postural balance, and walking were significantly improved after mat Pilates exercise, except for five times sit-to-stand test (p<0.05). Conclusions: This study demonstrated that the mat Pilates exercise was a useful method to improve lower extremity function, postural balance, and walking in the older women with unilateral total knee arthroplasty.

• Tunnel and Underground Space
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• v.24 no.6
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• pp.418-429
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• 2014

Induced seismicity related to four energy development technologies that involve fluid injection or withdrawal: geothermal energy, conventional oil and gas development including enhanced oil recovery (EOR), shale gas recovery, and carbon capture and storage (CCS) is reviewed by literature investigation. The largest induced seismic events reported in the technical literature are associated with projects that did not balance the large volume of fluids injected into, or extracted from the underground reservoir. A statistical observation shows that the net volume of fluid injected and/or extracted may serve as a proxy for changes in subsurface stress conditions and pore pressure, and other factors. Energy technology projects that are designed to maintain a balance between the amount of fluid being injected and the amount of fluid being withdrawn, such as geothermal and most oil and gas development, may produce fewer induced seismic events than technologies that do not maintain fluid balance, such as long-term wastewater disposal wells and CCS projects.

• Journal of the Korean Society of Physical Medicine
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• v.11 no.4
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• pp.41-47
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• 2016

PURPOSE: The purpose of this study was to investigate the effects of differences in exercise time arrangement on the functional recovery of the lower limbs and balance of stroke patients. METHODS: The subjects of this study were 100 patients who were hospitalized in two hospitals located in Gyeonggi-do. Before the experiment, 60 of these patients who met the inclusion criteria and did not meet the exclusion criteria were randomly divided into an experimental group (n = 30), whose exercise time was concentrated, and a control group (n = 30), whose exercise time was diffuse. The two groups underwent six weeks of physical and occupational therapy four times a day for five days a week. One session of therapy took 30 minutes, including three sets of physical therapy and one set of occupational therapy. The rest time between the sessions was different for each group. The experimental group had five minutes of rest between each therapy session, and the control group had two hours of rest time between each session. The Fugl-Meyer assessment (FMA), an assessment of each patient's limit of stability (LOS), and a timed up and go test (TUG) were used as test tools. RESULTS: Both groups showed statistically significant increases in their FMA results, LOS measurements, and TUG results. The FMA results of the experimental group were significantly higher than those of the control group. CONCLUSION: Thus, concentrated exercise time was more effective than diffuse exercise time for the recovery of motor function.