• Journal of the Korea Convergence Society
• /
• v.12 no.10
• /
• pp.311-320
• /
• 2021

The purpose of this study is to identify the mediating effect of self-efficacy in the relationship between the leadership style of badminton life sports leaders and the performance of club members. A total of 600 badminton club members were invited to participate and 593 were selected for this study. For data analysis, mediating effects were verified through frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, multiple regression analysis, and hierarchical regression analysis. For result section, first, it was found that training instruction behavior, authoritative behavior, and social behavior, which are sub-factors of the leader leadership type, have a positive effect on performance(p<.05). Second, it was found that training instruction behavior, which is a sub-factor of leader leadership type, had a positive effect on self-efficacy(p<.01), and that authoritarian behavior had a negative effect on self-efficacy(p<.01). Third, the mediating effect of self-efficacy was found indirectly in the relationship between leader leadership and performance(p<.001). Based on these results, it is judged that it will be easier to build a more effective training system if the direction for the leadership and guidance type of life sports is set by reflecting the needs of the participants.

• Animal Bioscience
• /
• v.34 no.6
• /
• pp.957-966
• /
• 2021

Objective: Ovarian follicular development, which dependent on the proliferation and differentiation of granulosa cells (GCs), is a complex biological process in which miRNA plays an important role. Our previous study showed that miR-458b-5p is associated with ovarian follicular development in chicken. The detailed function and molecular mechanism of miR-458b-5p in GCs is unclear. Methods: The luciferase reporter assay was used to verify the targeting relationship between miR-458b-5p and catenin beta-1 (CTNNB1), which is an important transcriptional regulatory factor of the Wnt/β-catenin pathway. The cell counting kit-8 (CCK-8) assay, flow cytometry with propidium iodide (PI) and annexin V-fluorescein isothiocyanate (FITC) labeling were applied to explore the effect of miR-458b-5p on proliferation, cell cycle and apoptosis of chicken GCs. Quantitative real-time polymerase chain reaction and Western blot were used to detect the mRNA and protein expression levels. Results: We demonstrated that the expression of miR-458b-5p and CTNNB1 showed the opposite relationship in GCs and theca cells of hierarchical follicles. The luciferase reporter assay confirmed that CTNNB1 is the direct target of miR-458b-5p. Using CCK-8 assay and flow cytometry with PI and Annexin V-FITC labeling, we observed that transfection with the miR-458b-5p mimics significantly reduced proliferation and has no effects on apoptosis of chicken GCs. In addition, miR-458b-5p decreased the mRNA and protein expression of CD44 molecule and matrix metallopeptidase 7, which are the downstream effectors of CTNNB1 in Wnt/β-Catenin pathway and play functional roles in cell proliferation. Conclusion: Taken together, the data indicate that miR-458b-5p regulates ovarian GCs proliferation through Wnt/β-catenin signaling pathway by targeting CTNNB1, suggesting that miR-458b-5p and its target gene CTNNB1 may potentially play a role in chicken ovarian follicular development.

• Korean Journal of Psychosomatic Medicine
• /
• v.29 no.2
• /
• pp.176-183
• /
• 2021

Objectives : The purpose of this study was to find out how demographic factors, suicide attempt patterns, psychiatric history and management of suicide attempters affect the completion of emergency department (ED) based case management program. Methods : Among the patients who attempted suicide and visited the emergency department of Chung-Ang University Hospital from June 1, 2018 to May 31, 2021, 661 patients who agreed to case management were studied. After being discharged from the emergency department, subjects were registered for an eight-week follow-up service program. Hierarchical logistic regression analysis was conducted with demographic factors, suicide attempt patterns, psychiatric history and management as independent variables, and completion of case management program as dependent variables. Results : Suicide attempt pattern had the most significant influence on the completion of case management program, followed by demographic factors, psychiatric history and management. Those who completed the case management program were significantly more likely to have suicide plans in the future, more authentic in suicide attempts, and had higher proportion of past suicide attempts than those who did not complete the program. Conclusions : To ensure that the subjects complete the follow-up project program and get connected to community services, an individualized approach with consideration of suicide attempt patterns, demographic factors, and psychiatric history is needed.

• Journal of vocational education research
• /
• v.37 no.2
• /
• pp.77-99
• /
• 2018

The purpose of this study was to investigate the employment possibility of the humanities college graduates to science and engineering field occupations, and to identify the occupational characteristics related to employability perceived by workers. To do this, basic statistical analysis, correlation analysis, and hierarchical multiple regression analysis were conducted using the data surveyed on 2,600 workers in the science and engineering field in the 'Research on Korean Occupational Index for Career and Employment Service(2017)'. The main results are as follows. First, the employment possibility of the humanities college graduates to science and engineering field was low, except for some occupations in the information communication, manufacturing and processing fields. Second, the occupational characteristics affecting the employment possibilities of the humanities college graduates to science and engineering field are as follows: low importance of the final education, low importance of the major, low importance of qualification, high importance of vocational training, easy to return after the career break, high level of gender equality, high level of pleasant work environment, high employment retention, easy to self-employment or start-up, and increasing number of jobs. Based on the results of this study, to support employment of humanities college graduate from the occupational aspect, it is necessary to find out some detailed jobs or to develop convergence occupations. At this time, it is possible to utilize the occupational characteristics factors that increase the employment possibility of humanities college graduates to science and engineering occupations.

• Fire Science and Engineering
• /
• v.33 no.2
• /
• pp.155-163
• /
• 2019

The purpose of this study was to investigate the mediation effect of the job efficacy on the relationship between job stress and career resilience of fire fighting officers. The participants of this study were 151 Jeju Island local fire fighting officers. The research tools used were job stress scale, career resilience scale and job efficacy scale. The data were analyzed using the SPSS statistical program. Pearson's correlation analysis, hierarchical multiple regression analysis and the Sobel test were conducted. The results of this study are as follows: First, there was a significant negative correlation between the job stress and the career resilience and between the job stress and the job efficacy, while there was a significant positive correlation between the job efficacy and the career resilience. Second, the job efficacy of fire fighting officers was found to have a perfect mediation effect on the job stress and the career resilience. As a result, it was found that job efficiency as a mediator to cope with job stress can improve the work efficiency by improving the career resilience of fire fighting officers. Finally, the discussion and implication are provided based on the results.

• The Journal of Society for e-Business Studies
• /
• v.23 no.3
• /
• pp.33-49
• /
• 2018

The importance of convergence activities among business is increasing due to the necessity of designing and developing new products to satisfy various customers' needs. In particular, decision makers such as CEOs are required to participate in networks between entrepreneurs for being connected with valuable convergence partners. Moreover, it is important for entrepreneurs not only to make a large number of network connections, but also to understand the networking relationship with entrepreneurs with similar topic information. However, there is a difficult limit in collecting the topic information that can show the lack of current status of business and the technology and characteristics of entrepreneur in industry sector. In this paper, we solve these problems through the topic extraction method and analyze the business network in three aspects. Specifically, there are C, S, T-Layer models, and each model analyzes amount of entrepreneurs relationship, network centrality, and topic similarity. As a result of experiments using real data, entrepreneur need to activate network by connecting high centrality entrepreneur when the corporate relationship is low. In addition, we confirmed through experiments that there is a need to activate the topic-based network when topic similarity is low between entrepreneurs.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.11
• /
• pp.264-277
• /
• 2018

Focusing on the potential impact of information and communication technology (ICT) on older adults' quality of life, this study empirically examined the influence of smartphone use in old age on life satisfaction, depression, social activity and social support of Korean older adults. In order to examine the effects of smartphone use, this study analyzed data from 630 questionnaire surveys from older adults aged 65 and over living in Seoul. The effects of smartphone use were tested using hierarchical multiple regression analysis, controlling for socio-demographic variables such as age, sex, spouse, education and income. Results showed that the effects of smartphone use on life satisfaction, depression and social activity of older adults were statistically significant. However, the effects of smartphone use on social support of older adults was not statistically significant. This study suggests that ICT such as smartphones in old age plays generally positive roles in enhancing psychological, mental and social aspects of quality of life. This implies that further practical efforts to expand the distribution and use of ICT in old age are required to improve quality of life and successful aging of older adults.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.6
• /
• pp.531-540
• /
• 2019

The purpose of this study was to establish the relationship between social support(MOS-SSS) and cognitive impairment(MMSE-K) to the elderly in long-term care facilities. The study subjects were 372 aged 65 and older who were admitted to care facilities located in D metropolitan city. Data were collected through a personal interview conducted by interviewers who visited each care facility in October 2018. As a result, the levels of cognitive impairment(MMSE-K) was significantly higher in the group with lower social support(MOS-SSS) scores. In correlation to the cognitive impairment and social support, the cognitive impairment score showed a significant positive correlation between the social support score (r=0.250, p<0.001). Therefore, the lower the social support level, the higher the level of cognitive impairment. In result of the logistic regression, the risk ratio of critical cognitive impairment increased significantly from 2.8 times (ORs=2.75, 95% CI=1.40 to 5.79) in the low group(Q1) than in the very high group(Q4) of social support scores. A hierarchical multiple regression analysis shows that the lower the social support, the higher the cognitive impairment. As such research suggests that the cognitive impairment of the elderly in care facilities increases with lower social support, it is necessary to seek concrete measures to improve social support as part of the measures to enhance the recognition capability of the elderly in care facilities.

• KIPS Transactions on Software and Data Engineering
• /
• v.8 no.1
• /
• pp.45-50
• /
• 2019

With the gradual advancement of IT, passive work processes are automated and the overall quality of life has greatly improved. This is made possible by the formation of an organic topology between a wide variety of real-life smart devices. To serve these diverse smart devices, businesses or users are using the cloud. The services in the cloud are divided into Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). SaaS runs on PaaS, and PaaS runs on IaaS. Since IaaS is the basis of all services, an algorithm is required to operate virtualization resources efficiently. Among them, desktop resource virtualization is used for resource high availability of unused state time of existing desktop PC. Clustering of hierarchical structures is important for high availability of these resources. In addition, it is very important to select a suitable algorithm because many clustering algorithms are mainly used depending on the distribution ratio and environment of the desktop PC. If various attempts are made to find an algorithm suitable for desktop resource virtualization in an operating environment, a great deal of power, time, and manpower will be incurred. Therefore, this paper proposes a resource clustering simulator for cluster selection of desktop virtualization. This provides a clustering simulation to properly select clustering algorithms and apply elements in different environments of desktop PCs.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.4
• /
• pp.137-148
• /
• 2019

This study was conducted to investigate the factors influencing burnout of nurses in long-term care hospitals based on the expanded JD-R model (Xanthopoulou et al, 2007). Participants were 167 nurses who worked in long-term care hospitals. The instruments used in this study were the Maslach Burnout Inventory, Copenhagen Psycho-social Questionnaire version II, Connor-Davidson Resilience Scale and the instrument developed by Thomas and Ganster (1995). Data were collected from August 25 to September 6, 2018 and analyzed based on frequency, t-tests, ANOVA, Pearson's correlation, and hierarchical regression using the SPSS WIN 23.0 program. The results were as follows: Nurses' burnout in long-term care hospitals was positively correlated with job demands (r=.24, p=.002) and negatively correlated with resilience (r=-.43, p<.001) and social support (r=-.41, p<.001). Factors influencing the level of burnout were resilience (${\beta}=-.28$, p<.001), social support (${\beta}=-.20$, p=.016), and job demands (${\beta}=.17$, p=.016) ), which together explained 32.0% of the total variance in burnout. Therefore, we strongly recommend interventions that reduce job demands and enhance resilience and social support to prevent and reduce the burnout of nurses in long-term care hospitals.