• Journal of the Korean Society for Railway
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• v.16 no.2
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• pp.144-150
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• 2013

This paper presents an analysis of door design for the Ui LRT based on experiments to predict doorway flow-time and their analyses results. A similar railway vehicle (from Gimhae LRT) and operational conditions are utilized to assess the doorway flow-time through repetitive experiments. Design of the experiments consists of four scenarios, and the experiments are repeated 39 times in total. We use the results of the experiments to verify the design of doors of Ui LRT (e.g. the required number of doors and their width). Various statistical analyses are carried out for the flow-time with respect to the number of boarding/alighting passengers. We make three category levels of boarding/alighting passengers, and analyze the mean and variance for each category, and then carry out One-Way ANOVA to analyze how the number of boarding/alighting and onboard passengers impact flow-time. The results of this paper can be used for making decisions about doors of the LRT vehicle.

• Journal of Digital Convergence
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• v.13 no.1
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• pp.321-329
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• 2015

Purpose: This study was to explore the turnover intention and related factors of long-term care for hospital care workers. Methods: Data were collected from 150 health care workers by structured questionnaires in three different hospitals at K metropolitan city, Korea. Data was analyzed by using PASW (SPSS) 18.0 program with t-test, one-way ANOVA, Pearson's correlation coefficient, and multiple regressions. Results: study shown a negative correlation between turnover intention and self-esteem (r=.24. p=.004), job satisfaction (r=.50, p<.001), organizational commitment (r=59, p<.001), and social support (r=.32, p<.001). Variables of study such as turnover experience, job satisfaction and organizational commitment were revealed 40% of variance in turnover intention. Conclusion: study results suggested that, development program is needed which improve the hospital worker's job satisfaction, organizational commitment and reduces turnover intention for long-term hospital care.

• Journal of Digital Convergence
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• v.11 no.9
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• pp.221-228
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• 2013

The purpose of this study was to examine the effects of alcohol use, depression, and self-esteem on suicidal ideation of older adults. Community-dwelling older adults aged 65 years and older were recruited from three welfare centers. A total of 245 older adults was assessed with the Alcohol Use Disorder Identification Test-Korean (AUDIT-K), Geriatric Depression Scale Short Form-Korea Version (GDSSF-K), Self-Esteem Scale (SES), and Scale for Suicidal Ideation (SSI). Descriptive statistics, Pearson's correlation, independent t-test, one-way ANOVA, and multiple regression analysis were performed using the SPSS WIN 19.0 program. Higher depression, lower self-esteem, no religion, and poorly perceived health were statistically significant determinants of higher level of suicidal ideation in older adults. To prevent or reduce suicidal ideation of older adults, health care providers should consider the determinants identified in this study.

• The Journal of Advanced Prosthodontics
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• v.5 no.2
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• pp.104-109
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• 2013

PURPOSE. Among the surface treatment methods suggested to enhance the adhesion of resin cement to fiberreinforced composite posts, conflicting results have been obtained with silanization. In this study, the effects of silanization, heat activation after silanization, on the bond strength between fiber-reinforced composite post and resin cement were determined. MATERIALS AND METHODS. Six groups (n=7) were established to evaluate two types of fiber post (FRC Postec Plus, D.T. Light Post) and three surface treatments (no treatment; air drying; drying at $38^{\circ}C$). Every specimen were bonded with dual-curing resin cement (Variolink N) and stored in distilled water for 24 hours at $37^{\circ}C$. Shear-bond strength (MPa) between the fiber post and the resin cement were measured using universal testing device. The data were analyzed with 1-way ANOVA and by multiple comparisons according to Tukey's HSD (${\alpha}$=0.05). The effect of surface treatment, fiber post type, and the interactions between these two factors were analyzed using 2-way ANOVA and independent sample T-tests. RESULTS. Silanization of the FRC Postec Plus significantly increased bond strength compared with the respective non-treated control, whereas no effect was determined for the D.T. Light Post. Heat drying the silane coupling agent on to the fiberreinforced post did not significantly improve bond strength compared to air-syringe drying. CONCLUSION. The bond strength between the fiber-reinforced post and the resin cement was significantly increased with silanization in regards to the FRC Postec Plus post. Bond strength was not significantly improved by heat activation of the silane coupling agent.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.7
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• pp.3046-3052
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• 2011

This study, continuing education programs and elderly welfare center in order to verify the source of satisfaction perceived elderly welfare center services for the elderly aged 60 or over to use the various welfare services for elderly, distribute the questionnaire with the permission of the welfare centers, utilizing a material portion 175. This study used PASW 18.0 program on the collected data and for data analysis, detailed statistical analysis methods used were t-test and One-way ANOVA. Gender were observed in higher overall satisfaction of a man, granted a high degree of satisfaction lower age, education elementary school, at least university graduates, found that satisfaction is high. In health, become clear that the more satisfied the more you health, spending money a month it became clear that the more satisfied the elderly to be used about 300,000 won to 500,000 won use period found that the elderly were more satisfied if less than one year and more than three years. In the region, Gangseo-gu is found to be slightly higher overall satisfaction with services than the Eunpyong-gu.

• Restorative Dentistry and Endodontics
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• v.41 no.2
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• pp.130-136
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• 2016

Objectives: This study investigated the effect of red and white wine on color changes of nanofilled and nanohybrid resin composite. Materials and Methods: Sixty specimens of each resin composite were prepared. Baseline data color values were recorded using a spectrophotometer. Three groups of discs (n = 20) were then alternately immersed in red, white wine, and deionized water (as a control) for twenty five minutes and artificial saliva for five minutes for four cycles. Specimens were then stored in artificial saliva for twenty two hours. This process was repeated for five days following immersion in artificial saliva for two days. Subsequently, the process was repeated again. Data were analyzed by two-way repeated ANOVA, one-way ANOVA, and Tukey's HSD. Results: Red wine caused significantly higher color change (${\Delta}E^*$ > 3.3) than did white wine and deionized water (p < 0.05). Nanohybrid resin composites had significantly more color changes than nanofilled resin composite (p < 0.05). Conclusions: The effect of red and white wine on the color changes of resin composite restorative materials depended upon the physical and chemical composition of the restorative materials and the types of wine.

• Journal of The Korean Society of Integrative Medicine
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• v.2 no.1
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• pp.63-76
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• 2014

Purpose : The purpose of this study was to ascertain the effects of scapular stabilization exercise before rotator cuff surgery on pain and range of motion of middle-aged women. Method : 20 subjects who agreed on this experiment and were diagnosed with rotator cuff rupture participated in this study. Experimental groups were treated while 40 minutes a day, 5 times per week, for 2 weeks before surgery. The effects of scapular stabilization exercise were evaluated on VAS and range of motion. Collected data were analyzed with SPSS for windows ver. 20.0 program. One-way repeated ANOVA was used to examine a significance of each variable by time. Two-way repeated ANOVA was applied to examine a significance of the experimental group against the control group. In all statistical tests, the significance level was set by ${\alpha}=.05$. Result : The results of this study are as follows: 1) In both control and experimental groups, VASs were decreased significantly according to intervention period. There was no significant difference between VASs of two groups. 2) In both control and experimental groups, ROMs of shoulder, flexion, abduction and external rotation were increased significantly according to intervention period. In these three flexibility measurement variables, there were significant differences between ROMs of two groups. Conclusion : In view of all the results in this study, scapular stabilization exercise on before rotator cuff surgery proved to be effective in improving their pain, range of motion after surgery. It will be sufficient data to perform with their own exercise program.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.244-253
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• 2019

This study was a descriptive study to investigate the effects of healthcare workers' consciousness of biomedical ethics, recognition of good death, and self-esteem on attitude toward advance directive. Participants in this study were 292 healthcare workers in the three general hospitals located Y city. The data were collected from April 2 to April 23, 2019 and analyzed descriptive statistics, t-test, one-way ANOVA, Pearson correlation coefficient, and multiple regression using the SPSS Win. 22.0 program. The result of the multiple regression indicates the intention to awareness regarding advance directives, intention to execute advance directives, time to complete advance directives and recognition of good death predict 23.5% (F=12.39, P=.000) of attitudes toward advance directives. Therefore, it is necessary to develop a program to establish attitudes toward advance directives by providing education on recognition of good death of healthcare workers.

• Journal of Convergence for Information Technology
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• v.11 no.7
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• pp.155-163
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• 2021

This study was conducted to identify factors that affect the life satisfaction of college students. The subjects of this study were 191 students from three universities located in one area, and the data collection used self-reported questionnaires. Data analysis was performed using frequency, percentage, mean, standard deviation, Independent T-test, One-way ANOVA, Pearson Correlation Coefficient, and Multiple Regression Analysis. The results of the study showed that significant factors affecting the life satisfaction of the subjects were self-esteem and school life satisfaction, and the explanatory power according to the influence factors was 42.3%. The research results suggest that improving college students' self-esteem and school life satisfaction can help them improve their life satisfaction. Therefore, it is necessary to consider self-esteem and school life satisfaction when developing educational programs to improve the life satisfaction of college students in the future.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.4
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• pp.124-130
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• 2021

Dental prosthesis translucency importantly contributes to aesthetic outcomes. The purpose of this study was to investigate the effect of drying time and zirconia coloring agent type on translucency. For the experiment, 90 circular specimens were fabricated for each zirconia block. Then, zirconia specimens were treated with a coloring agent for 180 seconds and dried for 0 seconds (undried), 30 seconds (intermediate dry), or 30 minutes (complete dry). Then, a specimen was placed on a black standard tile or a white standard tile, and using a standard D65 light source reflected was measured using the light removal method. A total of three repeated measurements were obtained per specimen. One-way ANOVA was used to compare and analyze the relationship between zirconia translucency and drying time. Zirconia and coloring liquid types were significantly associated with translucency (P < 0.001). Although no significant difference was observed with respect to drying time (P > 0.922), zirconia in the completely dried (30 minutes) state was more translucent.