• Journal of Korean Academy of Medicine & Therapy Science
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• v.10 no.2
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• pp.5-11
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• 2018

Objective: The purpose of the present study is to investigate whether intensive ankle training using biofeedback to increase proprioceptive senses and ankle-joint muscle strength effectively improves the balance of normal adults. Method: This study included 20 voluntary participants with normal adults. The subjects were randomly divided into 2 groups: the biofeedback intensive ankle training group (n=10) and the ankle training group (n=10). The biofeedback group used a visual biofeedback program. Subjects of the group that underwent ankle training only tried to keep their bodies balanced as well as possible on an Aero-Step. Both groups performed the exercise equally for three 30-minute sessions weekly for six weeks. The differences between the measurements before and after the experiment were analyzed using Wilcoxon signed-rank tests. Mann-Whitney U tests were used to analyze the differences in variations between the groups. Results: The biofeedback group showed significant differences in the weight distributions A, B, C, D, LEFT, and HEEL and on the weight-distribution index. In contrast, the ankle training group showed significant differences in the weight distributions A, C, and LEFT. A comparison of the differences between the two groups found significant differences between them in the weight distributions A, B, C, D, LEFT, and HEEL. Conclusion: The biofeedback group showed a greater ability to control weight distribution. A longer experimental period involving more subjects would aid in developing exercise programs that are more diverse.

• The Korean Journal of Applied Statistics
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• v.30 no.2
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• pp.301-309
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• 2017

It is often possible to test for differences in population means when two or more samples are extracted from each N population. However, it is not possible to test for the mean difference if one sample is extracted from each population since a sample mean does not exist. But, by dividing a group of samples extracted one by one into two groups and generating a sample mean, we can identify a heterogeneity that may exist within the group by comparing the differences of the groups' mean. Therefore, we propose a minimum combination t-test method that can test the mean difference by the number of combinations that can be divided into two groups. In this paper, we proposed a method to test differences between means to check heterogeneity in a group of extracted samples. We verified the performance of the method by simulation study and obtained the results through real data analysis.

• Journal of the Korean Magnetics Society
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• v.18 no.6
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• pp.221-224
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• 2008

This paper describes the equivalent dipole modeling method utilizing a singular value decomposition technique from analysis data by the FNREMUS Detailled Modeller software based on BEM which can predict the underwater electric field signal due to a galvanic corrosion phenomenon on a naval vessel. The proposed dipole modeling method was successfully verified in good agreement with predicted BEM data at 30 m depths through the comparison of average differences. The proposed dipole modelling method can be effectively used in the prediction and analysis of static electric field signature distributions generated from a naval vessel at any different depths.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.143-148
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• 2004

This paper presents the two modes for maximum power point tracking of the photovoltaic system. The method combines the merits of the two methods consisting of the open circuit method and the three point weight comparison method. The maximum point found by this method is exactly than by the open circuit method. By the simulation results, the actual maximum point can be found that is better than the Perturb and Observe (P&O) method or the three point weight method only one method, especially, in the case of non regular pattern of Power-Voltage (P-V) curve.

• Journal of Acupuncture Research
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• v.28 no.4
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• pp.85-92
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• 2011

Objectives : This study was designed to compare the effect between method of regulating ascending kidney water and descending heart fire and sweet bee venom pharmacopuncture on peripheral facial paralysis. Methods : We investigated 30 cases of patient with peripheral facial paralysis who visited at Dept. of Acupuncture & Moxibustion, of Oriental Medicine Dong-eui University from November 29, 2010 to May 15, 2011. Subjects were divided randomly into two groups, group A and group B. We applied method of regulating ascending kidney water and descending heart fire twice or three times a week for group A and sweet bee venom pharmacopuncture with same cycle for group B. We measured the effect of treatment to each group five times by using Yanagihara's unweighed grading system. at first examination, after 1 week, 2 weeks, 3 weeks, and 4 weeks. Results : Both groups showed significant improvement in Yanagihara's scores. And group A was improved better than group B for two weeks from the first examination significantly. But after one week from then, the Yanagihara's scores of group B were higher than those of group A significantly. There were no significant differences during other period. Conclusions : Method of regulating ascending kidney water and descending heart fire is more effective than sweet bee venom pharmacopuncture on peripheral facial paralysis during acute period. And after acute period, sweet bee venom pharmacopuncture is more effective than method of regulating ascending kidney water and descending heart fire.

• The Journal of the Korea Contents Association
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• v.20 no.7
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• pp.292-301
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• 2020

This study explored the changes in nutrition knowledge and eating habits formation of infants through vegetable gardening activities in early childhood education institutions. children from H nursery school located in Suwon-si, Gyeonggi-do, and H nursery school located in Hwaseong-si, Gyeonggi-do, were divided into 18 experimental groups and 18 people from comparison group and pre-post analysis was conducted. The research tool analyzed the data collected using the nutrition knowledge measuring tool and the eating habits measuring tool using the program SPSS, and the analysis method was conducted with t-test(verification) to verify the homogeneity of the experimental group and the comparative group. Analysis result, first. Infants aged 3 to 4 in experimental groups who have experienced vegetable gardening activities have higher nutritional knowledge than infants in comparison groups. In the case of nutrition knowledge, there was no statistically significant difference between the experimental group and the comparative group before the vegetable gardening activities were carried out. But after the experimental treatment, the experimental group showed statistically significant differences in improving the concept of nutritional knowledge (the reason for eating food, the type and function of food, hygiene, and garden) in the post-examination of the comparative group. Second, it can be seen that infants aged 3 to 4 in experimental groups who experienced vegetable gardening activities showed significant differences in table manners and eating behavior among sub-factors of eating habits compared to infants in comparison groups who had never experienced them. In conclusion, vegetable gardening activities are educationally useful in terms of expecting positive changes in the nutrition knowledge and eating habits formation of infants.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.77-79
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• 2007

The purpose of this study was to suggest a new detection method for early diagnosing diabetic neuropathic foot by obtaining a ratio of toe to figer blood flow using photoplethysmography(PPG). Nerve conduction velocity (NCV) has been routinely used for diagnosing neuropathic foot, but it applies strong electric stimulus to peripheries resulting in stress and pain. The blood flow ratio of diabetic neuropathy(0.96${\pm}$0.20) was significantly higher in comoarison to normal control group(0.46${\pm}$0.15, left : p<0.05, right : p<0.05) and non-neuropathy diabetic group(0.49${\pm}$0.21, left: p<0.05. right: p<0.05).

• Bulletin of the Korean Chemical Society
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• v.30 no.10
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• pp.2419-2421
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• 2009

A simple and efficient method has been developed for Knoevenagel condensation between aldehydes or ketones and active methylene group by stirring in methylene chloride at 60 ${^{\circ}C}$ under heterogeneous conditions using silica supported ammonium acetate. The products are obtained in excellent yields and are in a state of high purity. The structures of the products were confirmed by IR, $^1H$ NMR and mass spectral data and comparison with authentic samples available commercially.

• Journal of the Korean Home Economics Association
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• v.26 no.4
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• pp.161-172
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• 1988

The purpose of present study was to investigate the effect of sex and sex role identity on marital satisfaction. The short-from Bem Sex Role Inventory(BSRI) and Marital satisfaction Scale (MSS) were administered to the married men (n=90) and women (n=130) in Pohaing City. The data were analysed by two-way ANOVA and the Scheff method of multiple comparison. Major findings were as follows: 1. Marital satisfaction was significantly related to sex role identity rather than to sex: The androgynous group reported the highest marital satisfaction scores, whereas the undifferentiated group did the lowest scores. 2. There was no significant sex difference in marital satisfaction socres among the masculine, androgynous, and undifferentiated groups except the feminine one. Only in the feminie group, males who had high feminity scores reported high marital satisfaction scores, whereas females who had high femininity scores reported low marital satisfaction scores.

• Journal of Korean Neurosurgical Society
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• v.52 no.3
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• pp.204-209
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• 2012

Objective : The authors performed a retrospective study to assess the accuracy and clinical benefits of a navigation coupled with O-arm$^{(R)}$ system guided method in the thoracic and lumbar spines by comparing with a C-arm fluoroscopy-guided method. Methods : Under the navigation guidance, 106 pedicle screws inserted from T7 to S1 in 24 patients, and using the fluoroscopy guidance, 204 pedicle screws from T5 to S1 in 45 patients. The position of screws within the pedicle was classified into four groups, from grade 0 (no violation cortex) to 3 (more than 4 mm violation). The location of violated pedicle cortex was also assessed. Intra-operative parameters including time required for preparation of screwing procedure, times for screwing and the number of X-ray shot were assessed in each group. Results : Grade 0 was observed in 186 (91.2%) screws of the fluoroscopy-guided group, and 99 (93.4%) of the navigation-guided group. Mean time required for inserting a screw was 3.8 minutes in the fluoroscopy-guided group, and 4.5 minutes in the navigation-guided group. Mean time required for preparation of screw placement was 4 minutes in the fluoroscopy-guided group, and 19 minutes in the navigation-guided group. The fluoroscopy-guided group required mean 8.9 times of X-ray shot for each screw placement. Conclusion : The screw placement under the navigation-guidance coupled with O-arm$^{(R)}$ system appears to be more accurate and safer than that under the fluoroscopy guidance, although the preparation and screwing time for the navigation-guided surgery is longer than that for the fluoroscopy-guided surgery.