• The Journal of Korean Physical Therapy
• /
• v.36 no.1
• /
• pp.27-32
• /
• 2024

Purpose: This study was conducted to verify the effect of applying a pressure biofeedback unit on walking ability and knee joint function while performing knee joint extensor strengthening exercises using resistance exercise equipment in total knee replacement (TKR) patients. Methods: This study was conducted on twelve patients receiving rehabilitation treatment after being admitted to a rehabilitation hospital post-TKR. Of these, six were allocated to a feedback group with a pressure biofeedback unit, and the other 6 were allocated to a control group without a pressure biofeedback unit. The subjects performed an exercise program for 45 minutes per session, five times a week, for two weeks. Walking ability and knee joint function were evaluated and analyzed before and after exercise. Results: The feedback group showed significantly better improvements in walking speed, gait cycle, step length on the non-operation side, time on the foot on the operation side, K-WOMAC stiffness, and K-WOMAC function than the control group (p<0.05). Conclusion: When strengthening the knee joint extensor muscles using resistance exercise equipment in TKR patients, the provision of a pressure biofeedback unit was found to improve walking ability and knee joint function by inducing concentric-eccentric contraction of the knee joint extensor muscles. Therefore, the study shows that exercise based on the provision of a pressure biofeedback unit should be considered when strengthening knee joint extensor muscles to improve the walking ability and knee joint function of TKR patients in clinical practice.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2010.10a
• /
• pp.84-87
• /
• 2010

We manufacture an antifuse OTP (One-time programmable) cell for analog trimming which will be used in power management ICs. For the antifuse cell using dual program voltage of VPP (=7V) and VNN (=-5V), the thin gate oxide is broken down by applying a voltage higher than the hard break-down voltage to the terminals of the antifuse. The area of the manufactured antifuse OTP cell using $0.18{\mu}m$ BCD process is $48.01{\mu}m^2$ and is about 44.6 percent of that of an eFuse cell. The post-program resistances of the antifuse are good with the values under several kilo ohms when we measure twenty test patterns.

• Physical Therapy Rehabilitation Science
• /
• v.5 no.2
• /
• pp.106-112
• /
• 2016

Objective: This study was conducted to investigate the effects of resistant exercise on the gait performance of a patient with systemic lupus erythematosus (SLE) patient. Design: A case study. Methods: A 30-year-old male adult who had been diagnosed with systemic lupus erythmatosus (SLE) in April 2013, right middle cerebral artery infarction, and with left hemiplegia agreed to participate in this case study. Patient was unable to walk due to being affected with adynamia. Due to developing necrotizing vasculitis on the left lower extremity, patient underwent a myotomy on the left thigh. The patient was trained with a progressive resistant exercise program for 8 weeks. An intensity of 15 RM was used for the resistant exercises and the resistance level was increased progressively in order to improve the muscle power of the patient. Methods used to increase resistance included changing positions, providing mechanical resistance instead of manual resistance, transitioning from open kinetic chain to closed kinetic chain exercises, and changing the colors of the theraband to those with increase level of resistance. Outcome measures included the 5-repetition sit-to- stand test (5RSST), Timed Up & Go (TUG), and 10-meter walk test (10MWT). In addition, the GAITRite was used to assess the spatio-temporal gait variables, including gait speed, cadence, stride length of the left side, and double limb support pre and post-intervention. Results: The patient was able to perform sit-to- stand after two weeks of performing the resistant exercises. The patient was able to walk after 4 weeks, and the patient's overall gait performance had improved after 8 weeks. All of the variables had improved after each week. Conclusions: The results of this case study may be used to enhance future efforts to objectively evaluate resistant exercises during gait performance in persons affected by SLE.

• Journal of the Earthquake Engineering Society of Korea
• /
• v.2 no.4
• /
• pp.31-40
• /
• 1998

The purpose of this study is to investigate static elastoplastic behaviour and estimate ultimate resistance capacity of a high-rise apartment shear wall system subjected to a vertical distribution of lateral loading along the height. A typical 25-story two unit plan apartment is selected as a representive model. For the analysis, the pushover analysis is adopted to estimate initial elastic stiffness, post-yielding stiffness and story shear yield resistance level on each story of the structure through three-dimensional nonlinear analysis program-CANNY. In the result of elastoplastic analysis, it is observed that the yield strength of building structures is 1.6 times larger than required lateral design strength.

• The Journal of the Korea Contents Association
• /
• v.14 no.5
• /
• pp.235-243
• /
• 2014

The purposes of this study were to observe the effects of the exercise programs which have different order of walking and resistance exercises on the composition of the abdominal fat and the blood lipid profiles of the obese college women and to provide basic materials for the development of more effective and more efficient exercise program in order to reduce and prevent obesity. Classification of group, "A" group(resistance exercise after aerobic exercise) is a group of 12 people, "B" group(resistance exercise after aerobic exercise) is a group of 12 people. To determine the abdominal fat, intestine fat area, subcutaneous fat area, ratio of intestine fat area/subcutaneous fat area were analyzed, while for the blood lipid profiles, total cholesterol, triglyceride, high density lipid protein, and low density lipid protein were analyzed. First, there was statistically significant difference in the interaction in the abdomen subcutaneous fat. In the post analysis, the Resistance first group showed significantly more reduction to confirm that there was difference according to the order of the exercises. Second, there was statistically significant difference in the interaction effects in the factor of triglyceride. In the post analysis, the Resistance first group only showed significant reduction in the triglyceride to confirm that resistance exercise followed by aerobics would be better for the reduction of the triglyceride.

• Journal of Welding and Joining
• /
• v.32 no.2
• /
• pp.29-36
• /
• 2014

Recently, in order to enhance the function and usefulness of products, cladding of dissimilar materials that maximizes the performance of the material is being widely used in all areas of industry as an important process. Clad steel plate, produced by cladding stainless steel plate, an anticorrosive material, on carbon steel plate, is being used to produce pressure vessels. Stainless steel plate has good corrosion resistance, and carbon steel plate has good rigidity and strength; clad steel can satisfy all of these qualities at once. This study aims to find the ${\delta}$-ferrite behavior, mechanical properties, structure change, integrity and reliability of clad steel weld on hot rolled steel plates. For this purpose, multi-layer welding, repair welding and post weld heat treatment were implemented according to welding procedure specifications (WPS). In order to observe the mechanical properties and toughness of clad steel weld zone, post weld heat treatment was carried out according to ASME Sec. VIII Div.1 UW-40 procedure for post weld heat treatment. With heat treatment at $625^{\circ}C$, the hold time was used as the process variable, increased by intervals that were doubled each time, from 80 to 1,280 min. The structure of weld part was typical cast structure; localized primary austenite areas appeared near central vermicular ferrite and fusion line. The heat affected zone showed rough austenite structure created by the weld heat input. Due to annealing effects of heat treatment, the mechanical properties (tensile strength, hardness, impact value) of the heat affected area tended to decrease. From the results of this study, it is possible to conclude the integrity of clad steel welds is not affected much in field welding, repair welding, multi-layer welding, post weld heat treatment, etc.

• Journal of Korean Gerontological Nursing
• /
• v.20 no.3
• /
• pp.204-216
• /
• 2018

Purpose: The purpose of this study was to examine effects of a muscle strength reinforcement exercise program (MSREP) for older adult patients with hemodialysis (OAPHD) which was designed to improve health status and quality of life of these older adult patients. Methods: Participants were 40 patients with OAPHD: 20 in the experimental group and 20 in the control group. MSREP was conducted with the experimental group for 12 weeks at H geriatric hospital. An assessment was done to determine effects on physical performance, inflammation index, fatigue, muscle strength and quality of life. Short physical performance battery, C-Reactive Protein (CRP), visual analog scale for fatigue, object lifting' proposed by the Life Options Rehabilitation Advisory Council, sit-to-stand test, and quality of life index were used to gather data. Results: Between the 2 groups there was no significant difference in scores for physical performance, fatigue or quality of life. However, the 2 groups showed significant difference in CRP values and muscle power scores on post-test. Conclusion: Findings provide evidence for the potential utility of education for older adult patients with hemodialysis. Also, this program could allow these patients to increase muscle strength, and contribute to achieving better health conditions in OAPHD care.

• The Journal of the Korea Contents Association
• /
• v.12 no.9
• /
• pp.217-225
• /
• 2012

The purpose of this study was to identify the effect of auriculotherapy on menstrual cramps, dysmenorrhea and skin resistance variability(SRV) of the female nursing students. This study was a pre-test and post-test with non-equivalent groups design. The subjects were 64 female university students experiencing dysmenorrhea in Cheonan and Gyeongju; 31 for the treatment group and 33 for the sham treatment group. The subjects of the treatment group received auriculotherapy twice a week for 5 weeks and sham treatment group received sham auriculotherapy using tape. The obtained data were analyzed by SPSS/WIN12.0 program. The menstrual cramps, negative emotions about the menstruation and skin resistance in the treatment group was significantly less than in the sham treatment group. However, there were no statistical differences in autonomic nervous system reactions. Based on these results, auriculotherapy could improve the quality of life for dysmenorrhea of female university students. However, further studies are necessary to support the effect of auriculotherapy and the scientific validity of skin resistance variability(SRV).

• Steel and Composite Structures
• /
• v.43 no.6
• /
• pp.689-706
• /
• 2022

Thin-walled square concrete-filled double steel tubular (CFDST) columns composed of the inner circular tube filled with concrete can be used to carry the large axial loads or strengthen existing CFST columns in composite constructions. This paper reports an experimental program carried out on short square CFDST columns loaded concentrically. The influences of important column parameters on the post-buckling performance of such columns are investigated. Test results exhibit that the inner circular tube significantly improves the ultimate loads and the ductility of such columns compared to conventional concrete-filled steel tubular (CFST) and double-skin CFST (DCFST) columns with an inner void. A mathematical model developed is used to simulate the ultimate strengths and load-strain curves of such columns loaded axially. Furthermore, the ultimate strengths of such columns are predicted using existing codified design models for conventional CFST columns as well as the formulas proposed by previous researchers and compared against a large database comprising 500 CFDST columns. Lastly, an accurate artificial neural network model is developed for the practical applications of such columns under axial loading.

• Women's Health Nursing
• /
• v.16 no.3
• /
• pp.224-233
• /
• 2010

Purpose: This study explored the relationships among obesity, bone mineral density, and cardiovascular risks in post-menopausal women. Methods: One hundred post-menopausal women were recruited via convenience sampling from osteoporosis prevention program participants who were living in a metropolitan city in September 2006. Obesity was evaluated by body mass index, bone mineral density measured by DEXA scan, and cardiovascular risk factors assessed by a guideline of American Heart Association. Results: Seventy-two percent of women were either in the osteopenia or osteoporosis group, while 28% were in normal range in lumbar vertebrae. Obese women had greater bone mineral density in lumbar (F=3.31, p=.040) and femur (F=4.72, p=.011). Variables for cardiovascular risks were significantly different for high density lipoprotein (F=7.51, p=.001), systolic blood pressure (F=5.21, p=.007), and in percent of 10-year cardiovascular disease risk according to obesity. Conclusion: Post-menopausal women are at risk for obesity, osteoporosis, and cardiovascular disease. In order to prevent these conditions, nursing interventions such as resistance and aerobic exercise that reduces body weight and bone loss, increases high density lipoprotein, and reduces systolic blood pressure, should be proposed continually through health promotion programs for postmenopausal women.