Gwangju, South Korea
Gwangju, South Korea

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Cho S.-H.,Nambu University
Archives of Gerontology and Geriatrics | Year: 2017

The present study aimed to identify the effects of horseback riding and mechanical horseback riding exercise on the relative α-power spectrum in the elderly. A total of 31 healthy elderly were randomly divided into horseback riding (n = 15) and mechanical horseback riding exercise groups (n = 16). The horseback riding exercise program was conducted for 25 min twice a week for 12 weeks. Two-way repeated analysis of variance was used to identify the changes in measured variables before the exercise program, and after 6 and 12 weeks of the program. The horseback riding exercise group showed an increase in relative fast alpha power in the background electroencephalogram, and the mechanical horseback riding exercise group showed an increase in relative slow alpha power. Both horseback riding and mechanical horseback riding exercises activated the EEG in all domains, thus increasing concentration and restfulness. The results suggested that horseback riding and mechanical horseback riding exercise may have a positive effect on psychological stability in the elderly. © 2017 Elsevier B.V.


Huh Y.H.,Gwangju Institute of Science and Technology | Kim M.J.,Nambu University | Yeo M.G.,Nambu University
Homeopathy | Year: 2013

Background: Rhus toxicodendron (Rhus tox) is a homeopathic remedy with anti-inflammatory activities used for arthritis pain. Methods: We studied the effects of 4×, 30×, 30c and 200c homeopathic dilutions of Rhus tox in primary cultured mouse chondrocytes. We examined the expression of collagen type II, a marker protein of chondrocytes, and cyclooxygenase-2 (COX-2), which is responsible for the biosynthesis of prostaglandin E2 (PGE2) and the regulation of the inflammatory response. We assessed the expression of collagen type II and COX-2 using biochemical and immunological methods, such as reverse transcription polymerase chain reaction (RT-PCR), quantitative (or real-time) RT-PCR (qRT-PCR) and immunoblot assays. Results: Stimulation with different concentrations of Rhus tox increased the mRNA expression of COX-2, and stimulation with 30× Rhus tox showed the most prominent mRNA expression in both RT-PCR and qRT-PCR analyses. We also observed that homeopathic dilutions of 4×, 30× and 30c Rhus tox inhibited collagen type II expression, suggesting that Rhus tox induced the dedifferentiation of chondrocytes. In addition, treatment with 30× Rhus tox significantly increased PGE2 release compared with other homeopathic dilutions of Rhus tox. Conclusions: Taken together, these results suggest that homeopathic treatment with Rhus tox induced chondrocyte dedifferentiation and inflammatory responses, such as COX-2 expression and PGE2 production, in primary cultured chondrocytes. © 2013 The Faculty of Homeopathy.


Objective: Studies on alcohol consumption and benign laryngeal disease (BLD) in the general population are rare. The aim of this study was to investigate the relationship between alcohol consumption and BLD in the Korean general population. Study Design: This was a cross-sectional study of a national health survey. Materials and Methods: Subjects were 3141 noninstitutionalized civilian adults older than 19 years (1313 men and 1828 women) who completed the laryngeal examination of the Korea National Health and Nutrition Examination Survey of 2008. Frequency of drinking was classified into less than once per week, two to three times per week, and more than four times per week. Binge drinking was defined as five or more drinks (≥61 g of alcohol) per episode for men and as four or more drinks (≥41 g of alcohol) per episode for women. Poisson regression analyses were conducted to examine the relationship between alcohol drinking and BLD. Results: Adjusting for covariates (age, sex, income, level of education, occupation, and cigarette smoking), it was found that those who drank more than four times a week, compared with those who drank less than once per week, were more likely to have BLD (risk ratio = 2.15, 95% confidence interval: 1.01-4.59, P < 0.05). However, the amount of alcohol consumed was not associated with BLD. Conclusions: Frequent drinking (ie, more than four times a week) was found to be a risk factor for BLD. © 2014 The Voice Foundation.


Byeon H.,Nambu University
Annals of Otology, Rhinology and Laryngology | Year: 2015

Objective: This study investigated the prevalence of perceived dysphonia and its correlation with the prevalence of clinically diagnosed laryngeal disorders. Methods: Subjects were 8713 non-institutionalized civilian adults over the age of 19 (3810 men and 4912 women) who completed the laryngeal examination of the fifth Korea National Health and Nutrition Examination Survey. A Poisson regression was used to examine the association between perceived dysphonia and laryngeal disorders. Results: Adjusting for covariates (age, sex, education level, income, occupation, alcohol drinking, and self-reported health status), those with perceived voice problems were 4.8 times (OR = 4.75, 95% CI, 3.77-5.99) more likely to have laryngeal disorders than those without voice problems. In particular, the vocal fold pathology correlated with perceived dysphonia was: vocal fold nodules (OR = 5.32, 95% CI, 3.43-8.26), vocal polyps (OR = 3.73, 95% CI, 1.57-8.86), vocal cysts (OR = 11.97, 95% CI, 1.97-72.72), Reinke's edema (OR = 9.27, 95% CI, 4.77-18.00), laryngeal paralysis (OR = 3.58, 95% CI, 1.56-8.26), laryngeal granulomas (OR = 4.31, 95% CI, 1.01-18.80), epiglottic cyst (OR = 2.94, 95% CI, 1.21-7.13), and laryngitis (OR = 4.07, 95% CI, 2.91-5.69). Conclusion: People with self-perceived dysphonia had a high risk of laryngeal disorders. © The Author(s) 2015.


Kim J.-H.,Sahmyook University | Chung Y.,Sahmyook University | Kim Y.,Sahmyook University | Hwang S.,Nambu University
Gait and Posture | Year: 2012

The purpose of this study was to determine the influence of functional electrical stimulation (FES) applied to the tibialis anterior and gluteus medius muscles on the improvement of the spatiotemporal parameters of gait in individuals with a hemiparetic stroke. Thirty-six patients who had suffered a hemiparesis post stroke were enrolled in this study. The participants walked at a self-selected velocity on three different FES applications: (1) FES-triggered gait on the gluteus medius in the stance phase and the tibialis anterior in the swing phase (GM. +. TA), (2) FES-triggered gait on the tibialis anterior in the swing phase (TA only), and (3) gait without FES-triggered (Non-FES). FES was triggered when the heel in the affected lower limb was placed in contact with an on or off foot switch sensor. The effect of FES applications was assessed using GAITRite for spatiotemporal data. The gait speed, cadence, and stride length were significantly higher under the GM. +. TA condition than under the TA only and None-FES conditions. The gait speed, cadence and stride length were increased significantly in the TA only condition compared with the Non-FES condition. The double support time and gait symmetry were significantly improved in the GM. +. TA condition compared to the TA only and Non-FES conditions. These findings suggest that walking with FES of the gluteus medius in the stance phase and tibialis anterior in the swing phase can improve the spatiotemporal parameters of gait in individuals with hemiparetic stroke. © 2012 Elsevier B.V.


Purpose Although distortion of weight perceptions has been known as a risk factor for adolescent depression, little has been known about the relationship between weight misperception patterns and depressive symptoms. This study explored the relationship between distortion of weight misperception patterns and depressive symptoms in Korean adolescents. Methods The subjects of this study were 109,373 middle school students who participated in the Korea Youth Risk Behavior Web-based Survey (KYRBWS) from 2011 to 2013. By comparing the difference between Body Mass Index (BMI) and subjective perceptions of body weight, misperceptions of weight were classified into two categories: misperception of underweight and misperception of overweight. Results When confounding variables were adjusted, the results of the logistic regression analysis revealed that male students who perceived themselves as underweight despite their normal weight were 110% more likely to have depressive symptoms (OR = 1.10, 95%CI: 1.03-1.18) than male students with accurate weight perceptions. On the contrary, for female students, misperceptions of underweight had no significant relationship with depression symptoms. Regardingmisperceptions of overweight, female students who perceived themselves as overweight despite their normal weight were 107% (OR = 1.07, 95% CI: 1.02-1.11) more likely to have depressive symptoms than female students with accurate weight perceptions. Moreover, female students who perceived themselves as overweight when they were underweight were 137% (OR = 1.37, 95% CI: 1.18-1.58) more likely to have depressive symptoms. Conclusion Male students who underestimate their body weight and female students who overestimate their body weight were at a greater risk of depression emotions than students with accurate weight perceptions. © 2015 Haewon Byeon.


To identify a novel biopesticide controlling rice blast disease caused by Magnaporthe oryzae, 700 plant extracts were evaluated for their inhibitory effects on mycelial growth of M. oryzae. The L. foenum-graecum Herba extract showed the lowest inhibition concentration (IC50) of 39.28 µg/ml, which is lower than the IC50of blasticidin S (63.06 µg/ml), a conventional fungicide for rice blast disease. When treatments were combined, the IC50 of blasticidin S was dramatically reduced to 10.67 µg/ml. Since ABC transporter genes are involved in fungicide resistance of many organisms, we performed RT-PCR to investigate the transcriptional changes of 40 ABC transporter family genes of M. oryzae treated with the plant extract, blasticidin S, and tetrandrine, a recognized ABC transporter inhibitor. Four ABC transporter genes were prominently activated by blasticidin S treatment, but were suppressed by combinational treatment of blasticidin S with the plant extract, or with tetrandrine that didn’t show cellular toxicity by itself in this study. Mycelial death was detected via confocal microscopy at 24 h after plant extract treatment. Finally, subsequent rice field study revealed that the plant extract had high control efficacy of 63.3% and should be considered a biopesticide for rice blast disease. These results showed that extract of L. foenum graecum Herba suppresses M. oryzae ABC transporter genes inducing mycelial death and therefore may be a potent novel biopesticide. © The Korean Society of Plant Pathology.


Byeon H.,Nambu University
Journal of Voice | Year: 2015

Objective The purpose of this study was to identify risk factors affecting laryngeal pathology in the Korean population and to evaluate the derived prediction model. Study Design Cross-sectional study. Methods Data were drawn from the 2008 Korea National Health and Nutritional Examination Survey. The subjects were 3135 persons (1508 male and 2114 female) aged 19 years and older living in the community. The independent variables were age, sex, occupation, smoking, alcohol drinking, and self-reported voice problems. A decision tree analysis was done to identify risk factors for predicting a model of laryngeal pathology. Results The significant risk factors of laryngeal pathology were age, gender, occupation, smoking, and self-reported voice problem in decision tree model. Four significant paths were identified in the decision tree model for the prediction of laryngeal pathology. Those identified as high risk groups for laryngeal pathology included those who self-reported a voice problem, those who were males in their 50s who did not recognize a voice problem, those who were not economically active males in their 40s, and male workers aged 19 and over and under 50 or 60 and over who currently smoked. Conclusions The results of this study suggest that individual risk factors, such as age, sex, occupation, health behavior, and self-reported voice problem, affect the onset of laryngeal pathology in a complex manner. Based on the results of this study, early management of the high-risk groups is needed for the prevention of laryngeal pathology. © 2015 The Voice Foundation.


Objective The relationship between smoking and voice disorders is still controversial. This study has investigated the relationship between voice disorders and smoking by using a nationwide representative survey of the Korean population. Study Design Cross-sectional analysis of a national health survey. Methods The study sample 7941 Korean adults, aged 19 years or older (3422 men and 4519 women), who participated in the fifth Korea National Health and Nutrition Examination Survey, a nationwide representative survey of the noninstitutionalized population of the Republic of Korea. Laryngeal disorders were classified into functional voice disorders (vocal cord nodule, vocal polyp, Reinke edema, and laryngitis) and organic voice disorders (sulcus vocalis, vocal cyst, laryngeal granuloma, laryngeal keratosis, laryngeal leukoplakia, laryngeal papilloma, and suspected malignant neoplasm of the larynx). Multinomial logistic regression analyses were conducted to examine the association between smoking and voice disorders. Results Adjusting for covariates (age, gender, education level, occupation, income, alcohol drinking, self-reported voice problems, and self-reported health status), past smokers (odds ratio (OR) = 2.97, 95% confidence interval (CI): 1.14-9.03) and current smokers (OR = 3.22, 95% CI: 1.18-10.25) compared with nonsmokers, were more likely to have organic voice disorders. However, smoking was not associated with functional voice disorders. Conclusions Smoking is independently associated with organic voice disorders in the Korean general population. © 2015 The Voice Foundation.


The present invention relates to a solar position tracking accuracy measurement system based on an optical lens, by which the solar position tracking accuracy of a tracker can be effectively analyzed and detected in real-time by using a technique on the basis of an astronomical analysis on the trajectory of the sun through an accurate measurement based on an optical lens, thereby establishing the reproducibility of a physical measurement method, calculating an error angle according to the vertical incidence of solar light and minimizing physical errors.

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