• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.1B
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• pp.101-110
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• 2011

With the deployment of broadband networking technology, many clients are enabled to receive various Video on Demand (VoD) services. To support many clients, the network should be designed by considering the following factors: viewer's waiting time, buffer requirement at each client, number of channel required for video delivery, and video segmentation complexity. Among the currently available VoD service approaches, the Polyharmonic and Staircase broadcasting approaches show best performance with respect to each viewer's waiting time and buffer requirement, respectively. However, these approaches have the problem of dividing a video into too many segments, which causes very many channels to be managed and used at a time. To overcome this problem, we propose Polyharmonic-Staircase-Staggered (PSS) broadcasting approach that uses the Polyharmonic and Staircase approaches for the head part transmission and the Staggered approach for the tail part transmission. It is simple and bandwidth efficient. The numerical results demonstrate that our approach shows viewer's waiting time is comparable to that in the Harmonic approach with a slight increase in the bandwidth requirement, and saves the buffer requirement by about 60\% compared to the Harmonic broadcasting approach by simply adjusting the video partitioning coefficient factor. More importantly, our approach shows the best performance in terms of the number of segments and the number of channels managed and used simultaneously, which is a critical factor in real operation of VoD services. Lastly, we present how to configure the system adaptively according to the video partitioning coefficient.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.11
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• pp.5658-5671
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• 2013

This study was to identify the difference of achievement motivation, self-efficacy, self-directed learning across the learning styles after application of the Problem based learning(PBL) in Nursing students. Descriptive survey was performed from march to june, 2009 at a university in Jeju. The participants were 268 in freshman nursing student and PBL was used during one semester. The data from 242 participants were analysed using IBM SPSS 20.0 The results revealed that most nursing students had converger in learning styles. Achievement motivation and self-efficacy were the greatest scores in accommodator and self-directed learning was the greatest scores in converger. However, Achievement motivation, self-efficacy, and self-directed learning were lowest in diverger. Significant positive correlation was found among achievement motivation, self-efficacy, and self-directed learning each other. There were significant difference in achievement motivation, self-efficacy and self-directed learning across learning styles. More research is needed to determine the effects of PBL in nursing education including many variables.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.11
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• pp.5636-5645
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• 2013

The purpose of the study was to identify the relationship between emotional intelligence, ego resilience and stress in clinical practice of nursing students. The participants were 588 nursing students. The collected data were analyzed using descriptive statistics, t-test, ANOVA, and Pearson correlation coefficients. The mean scores for emotional intelligence 4.76(0.69), ego resilience 2.80(0.33), and stress in clinical practice 3.03(0.52) were above average. Emotional Intelligence was significantly different according to gender, satisfaction with nursing as a major, and satisfaction in clinical practice. Ego resilience was significantly different according to satisfaction with nursing as a major, satisfaction in clinical practice. Stress in clinical practice was significantly different according to gender, duration of clinical practice, satisfaction with nursing as a major, satisfaction in clinical practice, simulation practice, and main tutor in clinical practice. Significant correlations were found between emotional intelligence, ego resilience and stress in clinical practice. These findings indicate that there is a need to improve emotional intelligence and ego resilience to lessen stress in clinical practice of nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.131-138
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• 2019

This study investigated the effects of emotional intelligence and ego resilience on the clinical practice of nursing students. The subjects of this study were 203 college students who were in the third year of a nursing college in G province, Korea from June 12 2018 to August 29, 2018. The data was analyzed using means, standard deviations, Pearson correlation coefficients, t-tests, ANOVA, and multiple regression analysis of the SPSS 26.0 statistical program. The emotional intelligence, ego resilience, and clinical practice showed significant differences according to students' satisfaction with the nursing department, and these variables all have significant positive correlation. The regression analysis showed that emotional intelligence (β=.23, p<.001) and ego-resilience (β=.20, p<.05) were the significant variables affecting the clinical practice of nursing students, and these variables explained 15% of adaptation to their clinical practice (F=18.71, p<.001). Based on the results of this study, it is necessary to develop and utilize a program to enhance emotional intelligence and self-elasticity as a way to improve the adaption to clinical practice of nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.254-264
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• 2019

This study is a descriptive correlation study investigating the effects of stress disorder symptoms, resilience, and social network on post-traumatic growth in traffic accident patients. The participants were 158 traffic accident cases enrolled from five 100-bed hospitals situated in city C. Data were collected from July 1 to August 31, 2018, and analyzed by t-test, ANOVA, Pearson's correlation coefficients, and multiple regression using SPSS / Win23. The explanatory power of post-traumatic growth was determined to be 36.9%, and the factors affecting post-traumatic growth were social network and post-traumatic stress disorder. In addition, social networks completely established the relationship between resilience and post-traumatic growth. Our results confirmed that a wider social network and increased symptoms of post-traumatic stress disorder of the traffic accident patient are associated with higher post-traumatic growth. Therefore, it is necessary to explore approaches that improve the social networks and resilience to help post-traumatic growth of traffic accident patients. Additional research is required through repetitive and long-term observation of the accident victims.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.322-332
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• 2019

This is a descriptive research study that aims to identify the effects of professionalism, job satisfaction, and resilience on the retention intention of home visiting nurses from the long-term care insurance system of Korea. Data were collected from self-administered surveys completed by 141 home visiting nurses of registered visiting-nursing institutions in the long-term care insurance database (April 1-May 31, 2019). Analyses were independent t-tests, one-way analysis of variance (ANOVA), the Scheffé test, Pearson's correlation analysis using SPSS/WIN 22.0, and multiple hierarchical regression analyses. Results showed that the mean professionalism score was 3.51/5, 3.27/5 for job satisfaction, 3.79/5 for resilience, and 4.04/5 for retention intention. A positive correlation existed between retention intention and professionalism (r = .272), job satisfaction (r = .201), and resilience (r = .530). The final regression model showed that resilience (β = .455, p < .001) and job satisfaction (β = .175, p = .016) significantly affect retention intention. The variables' model explanation power was 32.0% (F = 11.968, p < .001). The results show the need for strategies to improve resilience, followed by strategies to improve job satisfaction to increase the retention intentions of these home visiting nurses.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.456-467
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• 2019

The purpose of this study was to investigate the effects of social support on self-esteem, depression, and stress of migrant women for marriage and to use them as basic data for developing depression and stress intervention strategies. This study provided correlation and regression analyses of 126 migrant women for marriage. The results showed that the level of social support was significantly and positively correlated to the migrant women's income level (p = .001 <.01) and self-esteem (r = 0.569, p <.001). However, there was a positive correlation among self-esteem, stress, and depression. Reviewing autocorrelations of the three dependent variables and the multi-collinearity between the independent variables, the autocorrelations of self-esteem, stress, and depression were 2.452, 2.418, and 2.278, respectively, indicating the absence of any autocorrelation problem. The regression analysis showed social support (p < 0.001) had a significant and positive relationship with self-esteem. The higher the social support (β = 0.472) was, the higher the self-esteem was. Based on the study results, it is expected that developing various programs of social support for migrant women for marriage is likely to reduce their depression and stress and increase the stability of family and social life.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.539-547
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• 2017

This paper reports the results of descriptive research aimed at determining the effects of the administrative hospital staff members' organization-based self-esteem and work engagement on their organizational citizenship behaviors. The participants of the study were 200 administrative staff members of general hospitals, each with 200 beds or more, located in B city. Data were collected from March 15 to 30, 2017, and analyzed statistically using a t-test, ANOVA, Pearson's correlation coefficient, and multiple regression analysis. The findings of this study can be summarized as follows. The organizational citizenship behaviors differed significantly according to whether they had an experience of turnover (t=-4.260, p=.000) and how long they had served at their present work (t=3.297, p=.039). In addition, the organizational citizenship behaviors had strong positive correlations with the organization-based self-esteem (r=.454, p=<.000) and work engagement (r=.595, p<.000). In addition, the factor that explained the organizational citizenship behaviors most significantly was work engagement, followed by organization-based self-esteem and the period of service at the present work. All three factors accounted for 41% of those behaviors. These findings suggest that the hospital should perform internal marketing or improve its welfare system to make administrative staff members raise their self-esteem based on their organization. Moreover, the hospital should form an organizational culture of its own, in which administrative staff members feel the importance of their job, enjoy it and are given autonomy in job performance, ultimately contributing to the development of hospital management.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.213-221
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• 2017

This study was conducted to identify professional self-concept, academic self-efficacy and department satisfaction among 327 nursing students to determine whether professional self-concept or academic self-efficacy has an impact on department satisfaction. Data were collected from May 29 till June 12, 2017 and subjected to frequency and percentage, mean and standard deviation, t-test, ANOVA, Scheffe's test, Pearson's Correlation Coefficient, and multiple regression analyses using SPSS version 22.0. The results revealed that purpose of admission to school, relationship with peers, and academic achievement significantly influenced professional self-concept, academic self-efficacy and department satisfaction, whereas gender, age, and religion did not. Additionally, there was a positive correlation between professional self-concept, academic self-efficacy, and department satisfaction. The factor that had the greatest impact on department satisfaction was professional self-concept, although academic self-efficacy and consideration of aptitude for major were also significant influencing factors. Overall, the results indicate that there is a need to develop and apply a variety of programs that can be used to increase professional self-concept to increase department satisfaction among nursing students. Accordingly, further studies are needed to increase academic self-efficacy among students and consider aptitude when admitting students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.300-309
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• 2017

This study was conducted to investigate the mediated effects of self-efficacy in relation to communication competency within the medical team and turnover intention of hospital nurses. Data were collected from 208 nurses working at two university hospitals. In analyzing data using SPSS/WIN 23.0 program, descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient and after analyzed with Multiple regression analysis using Baron & Kenny's 3 stage procedure, confirmed indirect effect with Sobel test. Evaluation of relationships among communication competency, turnover intention and self-efficacy of subjects revealed a negative relationship(r=-0.22, p=0.001) between communication competency and turnover intention, a positive relationship(r=0.61, p<0.001) between communication competency and self-efficacy and a negative relationship(r=-0.25, <0.001) between self-efficacy and turnover intention. Concerning the mediated effect of self-efficacy in the relationship between communication competency and turnover intention, the influence of communication competency at stage 1 on turnover intention was significant(${\beta}=-0.22$, p<0.001), but communication competency at stage 3 had no significant influence on turnover intention(${\beta}=-0.11$, p=0.194). Accordingly, the mediated effect of self-efficacy in the relationship between communication competency and turnover intention fully mediated and the mediated effect of self-efficacy was significant(z=-2.15, p=0.032). Heightening self-efficacy by improving communication competency could effectively reduce the turnover intention of nurses.