• Journal of Digital Convergence
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• v.19 no.4
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• pp.1-8
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• 2021

This experimental study was to examine the impact of collaborative learning in a virtual environment on students' learning outcomes and satisfaction. The collaborative virtual learning environment was created for a Korean history class for high school students. A total of 119 participants were recruited and were randomly assigned to either "collaborative group" or an "individual group." Students' academic achievements and satisfaction were collected as measurement tools to examine the effect of collaborative learning in the virtual learning environment and collected data were tested by independent sample t. The results showed that participation in collaborative groups had a significant positive effect on academic achievement and satisfaction than individual groups.

• The Korean Journal of Applied Statistics
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• v.24 no.6
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• pp.1271-1284
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• 2011

The entropy-based test of fit for the inverse Gaussian distribution presented by Mudholkar and Tian(2002) can only be applied to the composite hypothesis that a sample is drawn from an inverse Gaussian distribution with both the location and scale parameters unknown. In application, however, a researcher may want a test of fit either for an inverse Gaussian distribution with one parameter known or for an inverse Gaussian distribution with both the two partameters known. In this paper, we introduce tests of fit for the inverse Gaussian distribution based on the Kullback-Leibler information as an extension of the entropy-based test. A window size should be chosen to implement the proposed tests. By means of Monte Carlo simulations, window sizes are determined for a wide range of sample sizes and the corresponding critical values of the test statistics are estimated. The results of power analysis for various alternatives report that the Kullback-Leibler information-based goodness-of-fit tests have good power.

• Journal of Digital Convergence
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• v.12 no.12
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• pp.441-447
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• 2014

The purpose of this study was to explore differences of spinal stabilization muscle strength between groups classified by BMI for industrial workers. Fifty subjects participated in this study were divided to obesity group(BMI over $25kg/m^2$) and non obesity group(BMI under $25kg/m^2$). Independent t-test was applied for analysis. The results showed the following. There were significant differences in $0^{\circ}$ Forward on sagittal plane, in both $90^{\circ}$ Left, $90^{\circ}$ Right on coronal plane, in $45^{\circ}$ Left Tilt, $45^{\circ}$ Right Tilt on diagonal plane between groups. Last, There were significant differences in an amount of soft lean muscle and an amount of skeletal muscle between groups. These results shows that spinal stabilization muscle strength program for the obese should be considered in sagittal plane, coronal plane, and diagonal plane.

• Journal of Digital Convergence
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• v.16 no.7
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• pp.71-78
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• 2018

The purpose of this study is to investigate the impact of win-win growth activity of domestic large firms on their management performance. we classified the management performance into four factors such as ROE(Return On Equity), ROA(Return On Assets), net income to net sales and operating income to sales. The finding of this study is outlined as follows. This paper show that the win-win growth activity has a negative impact on the firms' management performance. This study shows that win-win growth activity could generate additional costs of business activity. So, we think that industrial policy is needed for expansion of win-win growth activity.

• Journal of Digital Convergence
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• v.17 no.6
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• pp.123-131
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• 2019

The purpose of this study is to demonstrate the causal relationship between positive emotions, positive psychological capital, and organizational identification, and to examine the double mediating effect. In this study, 369 social workers in 10 social welfare facilities in Seoul and Gyeonggi Province were sampled. The results of this study show that compassion experienced by the social workers has a positive effect on positive emotion and organizational identification, and positive psychological capital has a significant effect on the organization identification. In addition, double mediating effect of positive emotion and positive psychological capital were also shown to be significant in the relationship between compassion and organizational identification. Therefore, this study has the theoretical implication that double mediating effect of positive emotion and positive psychological capital are demonstrated in the relationship between compassion and organization identification. In future research, sample collection should be done for the generalization of the sample, and the mediating effect of positive organizational identity should also be performed.

• Journal of the Korean Data and Information Science Society
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• v.28 no.1
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• pp.109-117
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• 2017

This study aims to identify the effect for exercise intensity on hypertension using propensity score based on the sixth Korea National Health and Nutrition Examination Survey data and to provide an evidence for the most effective exercise intensity for prevention or treatment of hypertension. Specifically, we select 3,486 subjects who aged between 18 and 65 years after excluding some subjects who are expected to have limited athletic ability. We estimate propensity scores for exercise intensity based on the confounders such as sex, age, smoking, drinking, and natrium intake. Considering the complex survey design, we conduct a descriptive analysis and multiple logistic regression for hypertension with propensity score as a covariate. Although the results of the study did not show statistically significant relationship between exercise intensity and hypertension, we expect that it can be used as a basis evidence that the appropriate exercise of moderate intensity may be more effective for the prevention and treatment of hypertension rather than strong intensity exercise and non-exercise.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.525-533
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• 2015

Purpose: The purpose of this study was designed to find out the effect of game and mandala convergence approach on the attention ability of the with school aged children. Method : The subjects of study were 30 children(11 male, 19 female) with school aged children who were attending in A, B community children center located in B city. The intervention was administered for 4 weeks : 3 times a weeks and 12 sessions in total. They were separated into a mandala group(n=10), game group(n=10) and control group(n=10). The experimental group was provided game and mandala program for 4 weeks. Each group examined though FAIR attention and concentration test. Result : The results of this study showed that the game and mandala program was effective to improved attention ability of the school aged children. Conclusion: This study concludes that game and mandala program had effect on the improvement of children's attention.

• Journal of Digital Convergence
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• v.13 no.5
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• pp.375-384
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• 2015

This study is aimed at analyzing class participation value of the students who participate in physical education class implemented by university, and inquiring into the convergence relations between students-perceived class participation propensity and participatory behavior. In an effort to verify hypotheses consequent on this research objectives, this study conducted confirmatory factor analysis, reliability analysis, correlation analysis, and structural equation model analysis using PASW 18.0 and AMOS 18.0. The concrete results of this research are as follows: First, the class participation value of the students participating in general physical education was found to have an influence on participatory propensity. Second, the participatory propensity of the students participating in general physical education was found to have an influence on class participation behavior intention.

• The Journal of the Korea Contents Association
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• v.8 no.12
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• pp.141-150
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• 2008

The purpose of this study is to find the way of enhancing readability with Anti-Aliasing in digital media environment. Subjects of this paper were established analyzing Anti-Aliasing & Multiple Anti-Aliasing. First, this study is to find a actual condition of using Anti-Aliasing in digital media environment. Then Gathered the information of Multiple Anti-Aliasing samples from internat. I made enhancing readablity result with that information and tested this result for finding the best result for readability. This study will present the guid line for the person who is working as a designer in field to find the best result for readability with Multiple Anti-Aliasing. Also, will show us a readablity's possibility of using Multiple Anti-Aliasing for next verson of graphic software.

• Journal of the Korean Applied Science and Technology
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• v.37 no.4
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• pp.996-1007
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• 2020

The purpose of this study was to investigate the general characteristics, working condition, discrimination experience and job engagement of office workers and to examine the effect of discrimination experience on job engagement. This study was the secondary analysis of date from the fifth Korean Working Conditions Survey and the subjects included 6,718 office workers. Collected data were analyzed using descriptive statistics, x²-test, t-test, and complex samples general linear model(CSGLM). As a result, job engagement was high when they never experienced discrimination. Based on the results of this study, in order to improve job engagement of office workers, manage to prevent discrimination in the workplace should be included.