• Nutrition Research and Practice
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• v.17 no.2
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• pp.341-355
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• 2023

BACKGROUND/OBJECTIVES: The consumption of dietary supplements has shown an increase among young people in their 20s. We aimed to compare the use of dietary supplements and related factors between Chinese international and Korean college students living in South Korea. SUBJECTS/METHODS: We conducted online surveys of 400 Chinese international students and 452 Korean college students from January to February 2021. We analyzed the factors related to the use of dietary supplements by these students using multi-group structural equation modeling and logistic regression analysis. RESULTS: Approximately 65% of the Chinese international students and 93% of the Korean college students consumed dietary supplements at least once in the year preceding the survey. The common types of dietary supplements consumed by both groups of students were vitamin and mineral supplements, Lactobacillus products, and red ginseng products. Structural equation modeling showed that perception of the consumption of dietary supplements by family and friends positively influenced attitude toward dietary supplements. This effect was higher for Korean college students than for Chinese international students (P < 0.01). Attitude toward dietary supplements positively influenced their use, and this effect was higher for Chinese international students than for Korean college students (P < 0.001). Logistic regression analysis showed that the use of dietary supplements by Chinese international students was significantly associated with age, self-reported health status, interest in health, perception of and attitude toward dietary supplements, and length of residence in South Korea. Among Korean college students, it was associated with exercise frequency and attitude toward dietary supplements. CONCLUSION: This study showed significant differences in the use of dietary supplements and related factors between Chinese international and Korean college students. Therefore, nutrition education programs on dietary supplements need to have differentiated content for each group. Such differences also suggest that the industry should consider the relevant characteristics of college students while developing and marketing dietary supplements.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.9
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• pp.193-202
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• 2017

This study was conducted to investigate the levels of academic stress, ego-resilience, and health promoting behaviors of nursing students, and to examine the relationship between these variables. The participants were 208 nursing students(freshman/sophomore). Data were collected from April 3 to April 21, 2017 by self-administered questionnaires. Data were analyzed using the SPSS WIN 19.0 program(SPSS Inc., Chicago, IL, USA). The results of this study were as follows: the mean academic stress score was $3.17{\pm}0.55$, ego-resilience was $2.70{\pm}0.38$, and health promoting behaviors was $2.47{\pm}0.32$. There were significant differences in health promoting behaviors based on residence status, satisfaction with major, satisfaction with school life and health status. There was a negative correlation between health promoting behaviors and academic stress(r=-0.36, p=0.000), while there was a positive correlation between health promoting behaviors and ego-resilience(r=0.60, p=0.000). Variables such as ego-resilience, academic stress, satisfaction with school life, residence status, health status and satisfaction with major explained 43.3% of the variance in health promoting behaviors. Based on these results, it is necessaryto develop interventions and programs to reduce academic stress and increase ego-resilience to improve health promotion in nursing students.

• Journal of Music and Human Behavior
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• v.15 no.1
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• pp.51-68
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• 2018

The purpose of this study was to examine the use of music by international college students in Korea. A questionnaire was administered to foreign college students. The questionnaire was composed of 25 items regarding use of music, the purpose of music use, and demographic information. A total of 150 questionnaires were distributed, and 81 questionnaires were returned. Incomplete questionnaires were excluded, and the remaining 69 questionnaires were analyzed. The results of this study were as follows. First, international students in Korea preferred listening to music over playing instruments or singing and mostly listened to popular music in their dormitory alone. They mostly listened to popular songs with love related themes and preferred music from their own country over Korean music. Second, in terms of the purpose behind music use, comfort was the reason reported most frequently, followed by mood change, enjoyment, sense of belonging, and sense of achievement. Third, there were no significant differences in use of music depending on individual factors (e.g., gender, length of residence in Korea, length of previous music education), but significant differences were found for using music for the purpose of mood change and sense of belonging based on respondents' length of residence in Korea. The results of this study may contribute to the development of musical programs for cultural adaptation and psycho-emotional support for international students in Korea.

• Journal of Korean Public Health Nursing
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• v.12 no.2
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• pp.67-88
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• 1998

Present study was attempt to explore the relationship between perceived family support and depression and to emphasize the importance or needs of family support in psychological care especially among adolescents. Study subjects comprized of 308 high school students including vocational students in part, and data collection was done in the Kwangju City area in April. 1998. The Moos Family Environment Scale and the Zung's Self-Rating Depression Scale modified by investigators were used as measurement tools of 59 item questionnaire and in data analysis, statistical methods of T-test, ANOVA. and Pearson Correlation Coefficient were utilized. The study findings are as follows 1. The hypothesis of the study, 'the higher the degree of perceived family support among adolescents, the lower the level of depression', was supported (r=-0.4469, p<.001). 2. Some variables in demographic characteristics related to the degree of family support with statistical significance were school division of vacational vs non-vocational(t=-2.02, p<.05), age(f=5.47, p<.01), family monthly income (f=2.49, p<.05), mother's level of education (f=3.01. p<.05), residence at developmental stage (f=2.87, p<.05), personal problem of highest priority at present(f=7.73, p<.001), and family problem perceived by adolescents(f=7.38, p< .001). 3. Items In general characteristics related to the level of depression with statistical significance were sex(t=-2.91, p<.0l). mother's level of education(f=2.53. p<.05). residence at developmental stage (f=3.95. p<.0l). present personal problem of highest priority (f=3.68. p<.1l). and perceived in-family problem (f=4.58. p<.001). 4. The mean score of the degree of perceived family support was 61.26 $(SD=\pm14.45)$ in a range of 21.00 to 96.00 ; that of the level of depression. 43.74 $(SD=\pm8.04)$ in a range of 23.00 to 67.00. which demonstrated that the higher the degree of perceived family support, the lower the level of depression. In conclusion. it was found that the degree of family support perceived by adolescents is a variable affecting the level of depression. Based on the study outcome, further research suggestions can be made as such that repeated studies are needed in order to delineate the various factors affecting family support and depression, and a study involving family support implementation program is required as a nursing intervention for the development of emotional security among adolescents, perceived family support, depression, adolescence.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2889-2897
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• 2013

The purpose of this study was to analyze dental technician's individual competency and organizational commitment level and to examine its correlation. 200 dental technicians in Seoul, Incheon, and Chunchungnamdo area were selected. Survey was carried out from April 28, 2012 to May 25, 2012 by using self-administered questionnaire. As for the tools for this study, the structured questionnaire was used with its proven reliability and feasibility, and the contents of questionnaire consisted of 46 questions on the basis of related references. The subjects completed questionnaire regarding general characteristics, individual competency and organizational commitment. The data analysis was processed by computerized system with SPSS 18.0. Statistical analysis techniques included frequency, percentage, T-test, F-test analysis and regression analysis. As a result of analyzing the research subjects' individual competency level, there was significant difference in the item of age, marital status, residence area, carrier, job position, education(P<0.05). The average in the individual competency was indicated to be high with 3.68. As a result of analyzing the research subjects' organizational commitment level, there was difference in the item of gender, age, marital status, residence area, carrier, job position, education(P<0.05). The average of organizational commitment was indicated to be high with 3.46. Correlation between individual competency and organizational commitment, most of variables were indicated to have correlation, thereby having been shown that the more individual competency leads to the more organizational commitment.

• Korean Journal of Ecology and Environment
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• v.43 no.4
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• pp.471-476
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• 2010

Monthly up-river discharge in the riverine zone analysis resulted in large interannual variations and differences in calcium ($Ca^{2+}$), bicarbonate ($HCO_3^-$), and cations in the lacustrine zone (Lz) of Daecheong Reservoir during the wet year (Wy, 1993) vs. dry year (Dy, 1994). Total up-river discharge in the Wy was four times that of the Dy, and the up-river discharge in July~August of the Wy was eight times greater than that of same period of Dy. Annual water retention time in the Lz showed large difference between the two years. Water residence time (WRT) was minimum when the up-river discharge peaked, whereas the WRT was maximum when the up-river discharge was at minimal condition. This peak discharge from the up-river on early July reduced residence time in the Lz on mid-July~late July. Monthly pattern, based on data of May~November, was similar between the two years, but, but mean retention time in the Wy was 50 days shorter than in the Dy. Such hydrology, up-river discharge, and WRT reduced $Ca^{2+}$, $HCO_3^-$, and cations in the Lz. At low up-river discharge in Wy during April~May, the cation content of Ca+Mg+Na+K averaged 1.17meq $L^{-1}$ (range=1.09-1.26meq $L^{-1}$), but as the up-river discharge increased suddenly, the values decreased. Seasonal fluctuations of $Ca^{2+}$ showed exactly same pattern with bicarbonate ion of $HCO_3^-$. The minimum $Ca^{2+}$ (0.03meq $L^{-1}$) was occurred in the early August of wet year and coincided with the minimum $HCO_3^-$. These results suggest that the magnitude of variation in $Ca^{2+}$, bicarbonate, and cations in the lacustrine zone is directly determined by the peak magnitude of up-river discharge. The magnitude of up-river discharge determined water retention time and the magnitude of ionic dilution in the lacustrine zone, resulting in functional changes of the ecosystem.

• Journal of the Korean Society of School Health
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• v.22 no.2
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• pp.85-101
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• 2009

Purpose: We interviewed 500 students attending to universities in Gwangju and Jeonnam using a questionnaire. The questionnaire was composed of some questions on general characteristics of the subjects, academic characteristics, health-related behaviors, family function, and drinking problems. Methods: The data collected were analysed with uses of t-test, dispersion analysis, correlations analysis and multi-variate regression analysis. Results: As a result of the simple analysis we found that variables related to drinking problems of college students were religion, family, residence, parents' job, living standard, major, academic year, exercise, parents' drinking, parents' attitude to drinking, drinking quantity, intimacy, conflicts, and upbringing tendency. As a result of the multi-variate regression analysis, we found that the higher intimacy between family members, deterioration in behaviors, family and personal relations, and social functions was statistically significantly low. Conclusion: This study demonstrated that drinking problems of college students had significant relations with intimacy, conflicts and upbringing tendency and suggests that an approach in an aspect of family functions is important to overcome drinking problems of college students.

• Journal of Yeungnam Medical Science
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• v.34 no.1
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• pp.55-61
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• 2017

Background: Smartphone addiction, academic stress and anxiety of university students are increasing gradually; however, few studies have investigated these factors in medical school students. Therefore, this study investigated associations between smartphone addiction scale and sociopsychological aspects in medical school students. Methods: A total of 231 Yeungnam University College of Medicine students were enrolled in this study in March 2017. Gender, school grade, type of residence, and smartphone usage patterns of the students were surveyed. The Korean Smartphone Addiction Proneness Scale and each Korean version scale were used to assess sociopsychological aspects such as loneliness, stress and anxiety. Results: There was a direct statistical correlation between loneliness, stress of negative perception, anxiety and smartphone addiction scales. There was also a negative statistical correlation between stress of positive perception and smartphone addiction scales. There was a higher level of anxiety among female students than male students. Additionally, there was a higher level of stress associated with negative perception and anxiety among medical students in the first grade than other students. Moreover there was a higher level of loneliness, stress of negative perception and anxiety among students who live with friends than students who live with their own family. Conclusion: Smartphone addiction scale and sociopsychological aspects significantly correlated. Moreover, the results suggest that female medical students in the first grade who have been separated from their family need more attention and management of loneliness, stress and anxiety to avoid smartphone addiction.

• Archives of Pharmacal Research
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• v.18 no.5
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• pp.340-345
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• 1995

A nebumetone tablet in development $(Navuton^R)$ was tested for its bioequivalence to the erference tablet $(Uniton^R)$. Seventeen healthy Korean male subjects participated in this study. Each subject received a 1-g dose of nabumetone (2tables each) in an unbalanced, randomized, two-way crossover investigation. Serum concentrations of 6-methoxy-2-na-phthylacetic acid (6-MNA), a major metabolite of nebumetone, were measured over 120 hr interval by a high-performance liquid chromatography. The maximum serum concentration $(C_{max})$ and time to reach the maximum concentration$(T_{max})$ were read directly, but area under the serum concentration time curve from time 0 to 120 hr (AUC) and mean residence time serum curves showed multiple peaks of 6-MNA in most subjects, and the $C_{max}$ and $T_{max}$ were read from the highest serum peaks. calculated bioavailability parameters for test and reference tablets were 148.6 : 1377.9 $\mug \cdot hr/ml$ for AUC; 25.2:23.1 $\mu/ml$ for $C_{max}$; 11.8:16.4 hr for $T_{max}$, and 42.6 : 43.8 hr for MRT, respectively. The paired t-test revealed no significant differences in all the parameters between the two tablets. Analysis ofl variance (ANOVA) revealed no significant differences between groups and formulations in all the parameters ($C_{max}$ and $T_{max}$, AUC and MRT) indicating the crossover design of the experiment was properly performed. But significant differences (p<0.05) between subject/groups and periods were found for all the parameters indicating substantial intersubject and interperiodic variations for these parameters.

• Journal of Environmental Science International
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• v.17 no.2
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• pp.171-176
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• 2008

The VOCs have a direct influence on indoor air pollution, and stimulate respiratory organs and eyes in human body. Also, most of VOCs are a carcinogenic substances and causes to SBS (sickness building syndrome). Therefore, this study was progressed in photocatalysis of VOCs using UV/$TiO_2$ which was a benign process environmentally. The experiments were performed to know photodegradation characteristics as crystalline structure of $TiO_2$ which had anatase, rutile and P-25 (anatase : rutile = 70 : 30). The main purpose of this study was to identify photocatalytic characteristics as inlet concentration of reactants, $H_2O$, and residence time.