• Journal of the Computational Structural Engineering Institute of Korea
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• v.19 no.4 s.74
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• pp.429-440
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• 2006

This paper comprises two specific objectives. The first is to examine the applicability of ordinary kriging interpolation(OK) to the p-adaptivity of the finite element method that is based on variogram modeling. The second objective Is to present the adaptive procedure by the hierarchical p-refinement in conjunction with a posteriori error estimator using the modified S.P.R. (superconvergent patch recovery) method. The ordinary kriging method that is one of weighted interpolation techniques is applied to obtain the estimated exact solution from the stress data at the Gauss points. The weight factor is determined by experimental and theoretical variograms for interpolation of stress data apart from the conventional interpolation methods that use an equal weight factor. In the p-refinement, the analytical domain has to be refined automatically to obtain an acceptable level of accuracy by increasing the p-level non-uniformly or selectively. To verify the performance of the modified S.P.R. method, the new error estimator based on limit value has been proposed. The validity of the proposed approach has been tested with the help of some benchmark problems of linear elastic fracture mechanics such as a centrally cracked panel, a single edged crack, and a double edged crack.

• Journal of Digital Convergence
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• v.18 no.1
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• pp.187-198
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• 2020

The purpose of the study is to investigate infection management status of long term care hospitals and infection prevention knowledge of caregivers. This is descriptive study to investigate the factors affecting caregivers' infection control performance in long term care hospitals. The data collection period was from August, 2018, and a total of 197 caregivers from 8 long term care hospitals. The data analysis were done Win SPSS 20.0 with t-test, ANOVA, pearson's correlation coefficient, and hierarchical multiple regression analysis. Infection prevention knowledge was positively correlated with infection control performance (p=<.001). The factors influencing performance in a long term care hospital caregivers were over seventy years old (t=2.50, p=.013), eight-hour working time (t=-2.62, p=.010), nursing staffing First grades (t=2.48, p=.014), and infection prevention knowledge (t=2.96 p=.003), which explained 12.9% (F=6.70 p<.001). In summary, we recommend to develop infection education interventions to improve caregivers' infection control performance in long term care hospitals and to improve of the function in long term care hospitals.

• Journal of Digital Convergence
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• v.18 no.1
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• pp.59-71
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• 2020

The purpose of this study was to examine the mediating effects of empathy in relation to contact experience of the elderly and their knowledge level of ageing. For this study data was collected from 20th Dec. to 30th of Dec. 2018 355 university students from D university in J. province were surveyed. Data was analysis by using reliability test, correlation analysis, hierarchical multiful regression analysis. The statistical significance of the mediating effects was confirmed by Sobel's verification. The results of the analysis showed that the partial mediation effect of empathy was verified with regard to the relationship between elderly contact experience and discrimination of elderly people. In addition, the partial mediation effect of empathy was verified between level of aging knowledge and the perception of elderly discrimination. The results of this study confirmed the necessity of developing practical education and training programs to improve the level of aging knowledge and to increase contact experience with elderly people. There is also a need to enhance empathy in order to improve the awareness of discrimination against elderly people in health and welfare departments among university students.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.1
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• pp.29-41
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• 2017

Design rainfalls are one of the most important hydrologic data for river management, hydraulic structure design and risk analysis. The design rainfalls are first estimated by a point frequency analysis and the IDF (intensity-duration-frequency) curve is then constructed by a nonlinear regression to either interpolate or extrapolate the design rainfalls for other durations which are not used in the frequency analysis. It has been widely recognised that the more reliable approaches are required to better account for uncertainties associated with the model parameters under circumstances where limited hydrologic data are available for the watershed of interest. For these reasons, this study developed a hierarchical Bayesian based GLM (generalized linear model) for a regional frequency analysis in conjunction with a scaling function of the parameters in probability distribution. The proposed model provided a reliable estimation of a set of parameters for each individual station, as well as offered a regional estimate of the parameters, which allow us to have a regional IDF curve. Overall, we expected the proposed model can be used for different aspects of water resources planning at various stages and in addition for the ungaged basin.

• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.128-138
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• 2020

The purpose of this study is to verify the medial effect of social support in the process of the effect of working mother compatibility on spouse satisfaction. To that end, 727 employed workers who were kept samples until the 10th year (2017) were analyzed out of the data from the Korea Children's Panel Survey. Data analysis was performed for frequency analysis and regularity verification, and correlation and hierarchical regression were performed. In addition, the three-step method of Baron & Kenny (1986) was used to verify the mediated effect of social support. The results of the verification are as follows. First, the advantages of working mothers' work-in-home compatibility have had a static impact on their spouse satisfaction(ß=.164, t=4.078, p<.01). Second, the conflict between working mothers and their families has shown an amulet (-) impact on their spouse satisfaction(ß=-.134, t=-3.438, p<.05). Third, the partial selling effect of social support was verified in the process of the effect of the factors of conflict and advantages of working mothers on their spouse satisfaction. Based on the above research results, the compatibility of working mothers with working families suggested development and application of programs to enhance spouse satisfaction and social support.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.99-113
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• 2017

The purpose of study was to test the effects of service quality of regional festivals showing the characteristics of convergence service and perceived value of visitors on intention of word-of-mouth, and the moderating role of perceived value between service quality and intention of word-of-mouth. For this empirical study, the data were collected and selected from 320 residents in Wonju province and visitors for Wonju Hanji Cultural Festival from all around from the South Korea by using structured questionnaires. The data were analyzed by hierarchical regression technique. The results showed that both of 7 factors of service quality of regional festivals and 2 factors of perceived value had a positive effect on visitors' intention of word-of-mouth. And also found out the only one out of two perceived value factors, namely 'non-monetary value' had the moderate roles between service reliability out of 7 service quality factors and intention of word-of-mouth. The results of study was summarized and theoretical implications of the findings with practical applications were discussed. After then, the directions for further study were presented based on the limitation of this one.

• Journal of Digital Convergence
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• v.15 no.7
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• pp.111-121
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• 2017

Smartphone use has become a part of everyday life, not only for adolescents but also for elderly and older people. Thus, this study explored the effect of demographic variables, the amount of smartphone usage, type of smartphone use and psychosocial variables on smartphone dependence of the elder group. We analyzed the data of 5627 (50s and 60s) of the Internet overdependence survey data of the Korea Information Society Agency in 2016. As a result of hierarchical multiple regression analysis, More frequency of smartphone use of weekday and weekend, and usage time of smartphone of weekday were related to greater smartphone dependence. More smartphone use for information seeking and games were associated with greater smartphone dependence. And, as loneliness and anxiety increased, smartphone dependence increased, while smartphone dependence decreased, as social capital increased. Through this study, it is necessary to understand characteristics related to smartphone dependence of elder and older group, and to use this knowledge to solve their smartphone dependence. Future studies also need to identify the causal relationship between predictors of smartphone dependence in elderly and older people.

• Korean Journal of Occupational Health Nursing
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• v.24 no.2
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• pp.122-131
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• 2015

Purpose: The purpose of this study was to investigate what factors are affecting job-seeking stress in nursing students. Methods: Subjects were 463 students from two 3-year and two 4-year colleges of nursing in K-Province in Korea. Data was collected from self-administered questionnaires. t-test, ANOVA, Pearson's and Spearman's correlation coefficients, and hierarchical multiple regression with dummy variables were used for statistical analysis of data. Results: Job-seeking stress was significantly different by school system (t=2.76, p=.006), family economic status (F=3.40, p=.005), characteristics (t=1.99, p=.047), academic achievement (F=6.54, p=.002), current weight control status (t=2.23, p=.026), times of cosmetic surgery (r=.11, p=.022), self-esteem (r=-.47, p<.001) and appearance stress (r=.40, p<.001). However, after controlling for general characteristics, self-esteem, and perceived appearance stress, job-seeking stress was significantly different by grade (1st vs 3rd, ${\beta}=0.163$, p<.001), academic achievement (low vs. high, ${\beta}=-0.121$, p=.0321), self-esteem (${\beta}=-0.224$, p<.001), and appearance stress (${\beta}=0.099$, p<.001). The explanation power of self-esteem on job-seeking stress was greater compared with that of appearance stress. Conclusion: Results of this study suggest that it is necessary for nursing students to develop intervention program aimed at reducing job-seeking stress, and it would be effective to focus on improving self-esteem for them.

• Korean Journal of Social Welfare
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• v.68 no.3
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• pp.127-147
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• 2016

The purpose of this study was to examine the impact of 10-year psychosocial rehabilitation services provided by a psychosocial rehabilitation center on the quality of life for the mentally ill. The data were collected from a psychosocial rehabilitation center located in Daegu metropolitan area using a quasi-experimental study design. The experimental group consisted of 23 mentally ill subjects and the comparison group consisted of 23 mentally ill subjects that did not use the mental health services voluntarily. The quality of life were measured at baseline and every year over 10-year period. The collected data were analyzed using Hierarchical Linear Modeling(HLM). The findings of this study were as follows: First, it was found that the psychosocial rehabilitation services were effective increasing experimental group's quality of life outcomes. Second, the analyses indicated that the psychosocial rehabilitation services' effectiveness could be maintained at least 10 years indicating that the services had a long-term positive impact on the mentally ill. Third, it was revealed that the experimental group's quality of life outcomes improved over time showing a curvelinear shape rather than showing a linear pattern. The psychosocial rehabilitation services provided by a psychosocial rehabilitation center were positively affected the quality of life as well as maintained at least 10 years for the mentally ill. Finally, the implications and limitations of these findings were discussed.

• Journal of Korea Society of Industrial Information Systems
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• v.22 no.4
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• pp.79-95
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• 2017

This Study Investigates Whether R&D Capabilities and Market Orientation have Significant Effects on Product Innovation Performance in Order to Enhance Customer Value and Technology Innovation Competitiveness Considering the Characteristics of Rapidly Changing Semiconductor Industry. In other Words, as in the Research Model, the Purpose of this Study is to Investigate the Causal Relationship between the Independent Variable, R&D Capability and Market Orientation, on Product Innovation Performance, which is a Dependent Variable, through the Moderating Variable of Technological Innovation Orientation. For this Study, we Conducted a Questionnaire Survey on the Employees of Development Companies in the Semiconductor Industry and Finally Collected 118 Valid Questionnaires. The Collected Data was Analyzed by Multiple Regression Analysis with Demographic Characteristics as Control Variable and Hierarchical Regression Analysis was Conducted with the Moderating Effects of Technological Innovation Orientation. The Results Showed that the Higher the R&D Intensity and the External Network Capacity, the Higher the Product Innovation Performance. Also, the Product Innovation Performance was Higher than the Customer Orientation and Competitor Orientation Among the Market Orientation. In Addition, only R&D Capability Confirms that Technology Innovation Orientation is Moderated. The Result of this Study is to Improve Understanding of R&D Capability and Market Orientation in Creating of Product Innovation Performance of Semiconductor Companies and to offer Valuable Research Data in Empirically Supporting that Technological Innovation Orientation is an Important Moderating Factor in Creating Firm's Product Innovation Performance and Sustainable Competitive Advantage.