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.


Hong B.N.,Nambu University | Hong B.N.,Kyung Hee University | Kang T.H.,Kyung Hee University
Neuroscience Letters | Year: 2014

Neurological research has focused recently on determining the molecular mechanisms of common causes of damage to the peripheral and central nervous systems. One of the metabolic systemic diseases that can result in sensorineural hearing loss is diabetic mellitus (DM). In this study, we aimed to compare the auditory electrophysiological responses present in animal models of type 1 and type 2 DM using auditory brainstem response (ABR), auditory middle latency response (AMLR), and transient evoked otoacoustic emission (TEOAE) in animal model. We found that ABR threshold shifts and latency delays were similar in both types of DM. On the other hand, we found that type 2 diabetic mice exhibited more severe dysfunction to the central auditory pathway, as measured AMLRs and the cochlear hair cells, as measured TEOAEs. These results together suggest that hyperglycemia associated with type 1 or type 2 DM causes auditory nerve dysfunction, while hyperinsulinemia associated with type 2 DM causes dysfunction to both the central auditory pathways and cochlear hair cells. © 2014 Elsevier Ireland Ltd.


Byeon H.,Nambu University
Logopedics Phoniatrics Vocology | Year: 2017

This study aims to analyze the relationship between occupation and voice disorders using a national cross-sectional survey that represents the Korean population. Subjects were 5,407 members of the non-institutionalized population aged 19–59 (2,258 men, 3,149 women) who completed the laryngeal examination of the Korea National Health and Nutrition Examination Survey 2010–2012. Voice disorders were surveyed by classifying laryngeal pathologies and self-reported voice problems. Occupations were classified into ‘managers & professionals’, ‘clerical support workers’, ‘service & sales workers’, ‘skilled agricultural & forestry & fishery workers’, ‘craft & plant and machine operators and assemblers’, and ‘unskilled laborers’, based on the sixth Korean Standard Classification of Occupations. The results of the multinomial logistic regression analysis indicated that managers & professionals were 1.4 times (OR 1.42, 95% CI 1.01–2.01) more likely to have self-reported voice problems, and service & sales workers were 1.6 times (OR 1.62, 95% CI 1.14–2.30) more likely to have self-reported voice problems than economically inactive people (P < 0.05). Still, there was no significant association between the presence of laryngeal pathology and profession. Managers & professionals and service & sales workers may have a higher risk of voice problems than the economically inactive. © 2016 Informa UK Limited, trading as Taylor & Francis Group.


The aim of this study was to confirm the prevalence rate of benign vocal fold disease (BVFD) based on gender in the Korean adult population and investigate potential risk factors of BVFD. Subjects were 8,677 non-institutionalized civilian adults over the age of 19 (3,788 males and 4,899 females) who completed the laryngeal examination of the fifth Korea National Health and Nutrition Examination Survey. Poisson regression analyses were conducted to examine the potential risk factors of BVFD. The prevalence rates of BVFD were similar in men (2.7%) and women (2.6%). When adjusted for covariates, men with self-reported voice problems had a 6.7 times greater risk (RR 6.72, 95% CI 4.17-10.84) of BVFD (P < 0.01). In addition, women with self-reported voice problems (RR 4.71, 95% CI 3.01-7.37) and current smokers (RR 1.97, 95% CI 1.01-3.81) were more likely to have BVFD (P < 0.01). There are gender differences in the risk factors of BVFD. In order to prevent BVFD, the enactment of guidelines reflecting gender differences is required. © 2015 Informa UK, Ltd.


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.


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.


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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