• The Korean Journal of Applied Statistics
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• v.16 no.1
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• pp.129-140
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• 2003

This study was to develop a fruit sorting system using statistical image processing. Histogram was used to compare fruit colors to standard fruit color and edge detector using Wilcoxon test was used to calculate an accurate geometrical characteristics of fruit including perimeter, area, major axis and minor axis length and roundness. The experimental result obtained from using our system for sorting apples was presented.

• The Journal of Korean Academic Society of Nursing Education
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• v.22 no.3
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• pp.294-303
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• 2016

Purpose: The purpose of this study was to determine subjective happiness related factors in Korean nursing students. Methods: A purposive sample of 200 nursing students was recruited for the cross-sectional survey design. The instruments were perceived stress scale, major satisfaction scale, resilience scale, and subjective happiness scale. Data were analyzed using descriptive statistics, hierarchical linear regression, and the Sobel test for testing mediating effects. Results: The mean score of stress, major satisfaction, resilience and subjective happiness was 2.21, 3.95, 3.60 and 5.03, respectively. Perceived health status, stress_positive perception, stress_negative perception, resilience_self confidence, resilience_positivity, resilience_social support had significant effects on subjective happiness. Explained variance for the subjective happiness was 53.4%. Resilience had a partial mediating effect in the relationship between stress and subjective happiness (Sobel test: Z=-5.67, p<.001). Also, resilience had a mediating effect in the relationship between major satisfaction and subjective happiness (Sobel test: Z=5.65, p<.001). Conclusion: Based on the findings of this study, nursing intervention programs focusing on improving resilience are recommended to improve subjective happiness in nursing students.

• Research in Community and Public Health Nursing
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• v.28 no.3
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• pp.280-290
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• 2017

Purpose: The aim of this research is to examine the moderating effects of self-esteem and resilience in the relationship between smartphone addiction and depression among middle school students. Methods: Data were collected from 324 middle school students in D City during the period of July 1st-17th, 2015. Multiple regression analysis, the Baron & Kenny's mediation verification, and Sobel test were conducted to measure the mediating effects of self-esteem and resilience on depression. Results: There were significant correlations among the variables; smartphone addiction, self-esteem, resilience, and depression. Self-esteem had a complete mediating effect (${\beta}=-.40$, p<.001) in the relationship between smartphone addiction and depression (Sobel test: Z=4.68, p<.001). Resilience had a partial mediating effect (${\beta}=-.15$, p<.001) in the relationship between smartphone addiction and depression (Sobel test: Z=2.40, p<.001). Conclusion: This study suggests to apply self-esteem and resilience in developing nursing intervention programs for adolescent depression caused by smartphone addiction.

• Child Health Nursing Research
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• v.23 no.4
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• pp.429-439
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• 2017

Purpose: The aim of this study was to identify the status of psychological health among boys in high school and to examine the mediating effects of social support on the relationship between anger and entrapment on psychological health. Methods: The participants in this study were 193 high school boys from Jeju. Measurements included state-trait anger expression inventory, entrapment scale, student social support scale, and questionnaires to assess mental and physical health. Data were analyzed using independent t-test, one-way ANOVA, $Scheff{\acute{e}}$ test, Pearson correlation coefficient, simple and multiple regression techniques with the SPSS 21.0. Mediation analysis was performed with the Baron and Kenny's method, and Sobel test. Results: Mean scores for anger experience, entrapment, social support, and psychological health were $29.81{\pm}7.34$, $34.09{\pm}16.33$, $45.75{\pm}7.02$, $22.51{\pm}9.91$, respectively. There was a significant correlation between anger experience and psychological health. Entrapment was significantly correlated with psychological health. Social support showed partial mediating effects in the relationship between anger experience and psychological health (Sobel test: Z=54.18. p<.001). Social support showed partial mediating effects in the relationship between entrapment and psychological health (Sobel test: Z=2.24. p=.025). Conclusion: The results indicate a need to develop social support programs for boys in high school.

• The Journal of the Korea Contents Association
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• v.13 no.9
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• pp.164-177
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• 2013

This study's aim was to attest social support and self-efficacy's mediation effects in the path which social participation affected to elderly's suicidal ideation. Analysis data were Seoul Welfare Panel Data 2th wave(2010). A total of 1,429 cases aged over 65 were used for this study. Analysis method was AMOS 18.0's Structural Equation Modeling, and sobel test was used for attesting mediation effects's significance degree. Analysis results had established that measurement model and structural model's fit was favorable, and all path coefficients had significance degree. Therefore, this model was suitable for this study. Also this results had proved that this study's model was full mediation model, and it means that if mediation variables controlled, and then direct effect was excluded. And analysis results confirmed social support and self-efficacy' mediation effect had significance, by using a sobel test. Based on analysis results, this study suggested the importance of relationship between secondary group and individual, and presented intervention plans.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.329-337
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• 2023

This study investigated the mediating effect of critical thinking disposition on the relationship between ego resilience and self-leadership of nursing students. The subjects of the study were 193 third-year and fourth-year nursing students from three universities in G Province, and data were collected from November 1 to November 19, 2021. The collected data were subjected to descriptive statistics, t-test, ANOVA, Pearson's correlation, and multiple regression using the SPSS/WIN 23.0 program. The mediation effect was analyzed using Baron and Kenny's three-step procedure, and the statistical significance of the mediation effect was verified using the Sobel test. As a result of this study, self-leadership was positively correlated with ego resilience(r=.43, p<.001) and critical thinking disposition(r=.51, p<.001), and ego resilience was positively correlated with critical thinking disposition(r =.58, p<.001). It was found that there was a partial mediating effect of critical thinking disposition in the relationship between ego resilience and self-leadership(Sobel test: Z=5.05, p<.001). Therefore, in order to increase the self-leadership of nursing students, an integrated approach is needed to improve ego resilience and critical thinking disposition.

• Proceedings of the IEEK Conference
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• 2002.06d
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• pp.215-218
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• 2002

The edges of an image hold much of the information in that image. The edges tell where objects are, their shape and size, and something about their texture. An edge is where the intensity of an image moves from a low value to a high value. We introduce the edge detection using the differential operator with Sobel operator and describe a nonparametric Wilcoxon test based on statistical hypothesis testing for the detection of edges. This paper proposes an efficient edge detection using Van der Waerden's statistic in original and noisy images. We use the threshold determined by specifying significance level a and an edge-height parameter. Comparison with our statistical test and Sobel operator shows that Van der Waerden method perform more effectively in both noisy and noise-free images.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.5
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• pp.188-198
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• 2021

The purpose of this study is to verify the mediating effect from acceptance of the latest 4th Industrial Revolution technologies on the relationships between interest in the latest technologies, resistance to the latest technologies, and anxiety in workers at welfare institutions for the disabled. In order to achieve this goal, data were collected from July to August 2018 from workers at disability welfare centers in P Metropolitan City, and we analyzed data from 187 persons. Multiple regression analysis was applied to test the causal relationships between variables; the step-by-step analysis model of Baron and Kenny (1986) was used to verify mediating effects, and the Sobel test was performed to verify their significance. The analyses verified that the degree of interest in the latest technologies affects the degree of resistance to, and anxiety over, the latest technologies through acceptance of the latest technologies. At the same time, we verified that the degree of interest had a complete mediation effect because it did not directly affect the acceptance. In addition, the Sobel test result showed that the mediating effect was statistically significant. In other words, it was found that the degree of interest in the latest 4th Industrial Revolution technologies from workers at welfare institutions for the disabled increases the possibility of adaptation to future society by lowering resistance and anxiety through acceptance of the latest technologies. Based on these results, a plan to reduce resistance to, and anxiety over, the latest technologies was sought, and related measures to increase interest in the latest technologies and their acceptance are suggested.

• Korean Journal of Social Welfare
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• v.68 no.1
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• pp.53-71
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• 2016

This study, we analyzed the following in order to verify the effects of depression on suicidal ideation. First, correlations among depression, family solidarity and suicide variables were analysed. Second, the hierarchical regression analysis was conducted to examine the effects of suicidal ideation. Third, family solidarity Sobel-test was performed to investigate whether family solidarity mediates the link between depression and suicidal ideation. The data used in the study comes from the survey conducted by Hallym Aging Research Institute in 2014. Through stratified multi-stage random sampling, 2,034 individuals aged 65 and over and living in Chun-cheon city were analysed. The result with depression and family solidarity together shows the higher the level of depression is, the more suicide ideation is. which means depression has a direct impact on suicide ideation. In addition, it indicates the higher family solidarity is, the less suicide ideation is. Sobel-test which examines indirect effects of depression on suicidal ideation through family solidarity produces a statistically meaningful result. The result is family solidarity mediates the link between depression and suicidal ideation.

• The Journal of the Korea Contents Association
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• v.15 no.11
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• pp.177-191
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• 2015

This study was designed to investigate the differences in the mediation effects of cognitive emotion-regulation in the relationships between family stress and marital satisfaction of middle-aged husbands and wives. The data were underwent through the SPSS 19. Win for frequency, paired-t-test, multiple regression analysis, and for the further analysis of hiearchical multiple regression and the analysis for the mediation effect proposed by Baron & Kenny(1996) and Sobel test(Sobel, 1982). The results were as follows. First, hiearchical multiple regression analysis showed that education level, couples' problems, replanning strategies were proved to be significant for the marital satisfaction of the husbands, while age, couples' problems, acceptance strategies were significant for the marital satisfaction of the wives. Second, cognitive emotion-regulation strategies were proved to partially mediate in the relationship between family stress and marital satisfaction. The limitations of the study and implications for the further research were discussed based on the results.