• Journal of Families and Better Life
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• v.33 no.4
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• pp.147-160
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• 2015

This study analyzed the differences in adjustment and family environments of adolescents from three different family structures, using the KCYPS panel 4th wave data from first graders in middle schools. The participants of the study consisted of 1,715 adolescents in two-parent families, 79 adolescents in single-father families, and 113 adolescents in single-mother families. The data were analyzed by means of descriptive statistics and ANCOVAs. The findings of this study indicated that adolescents in two-parent families showed a lower level of physical symptoms than those in single-mother families and a lower level of participation in classwork than those in single-father families whereas adolescents in single-father families were more likely to be involved in delinquency than those from the other two family structures. In addition, significant differences were found in family environments including parents' physical health and life satisfaction, family economic status, parenting behaviors, and parents' absence at home after school. Parents in single-mother and single-father families were less healthy physically, showed lower levels of life satisfaction, reported less income, and spent less money for their children, compared to those in two-parent families. With regard to parenting behaviors, single fathers tended to be less warm toward and neglected their children more than single mothers and parents in two-parent families. Adolescents in single-father families were most likely to be left alone at home after school, followed by those in single-mother and two-parent families. The results suggested that specific attention needs to be paid to adolescents from single-father families in order to support their adjustment.

• Human Ecology Research
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• v.56 no.2
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• pp.133-144
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• 2018

The study examined the longitudinal relations of preschool children's peer interaction, linguistic and cognitive abilities, and self-control, while taking into account gender differences. The study was conducted with 671 preschoolers from the $5^{th}$, $6^{th}$, and $7^{th}$ wave of the Korean Children and Youth Panel Study (KCYPS). Data were analyzed by means of basic descriptive statistics, Pearson's correlations, and structural equation modeling analysis. Bootstrapping method was also used to determine the significance of indirect effects. The analysis were conducted to find the longitudinal effects of peer interaction at the age of 4 on their self-control at the age of 6, and the mediating effects of linguistics and cognitive abilities at the age of 5 on its associations. The results indicated gender differences among the variables. According to multi-group analysis, there was a significant influence of 4 years' peer interaction on subsequent 5 years' linguistic and cognitive abilities but also on 6 years' self-control across time for boys; however, no significant direct effect of peer interaction on self-control was found for girls. Based on the findings of this study, it can be implied that it is necessary to apply different methods for boys and girls to promote self-control from the influence of peer interaction and linguistic and cognitive abilities.

• Journal of the Korean Data and Information Science Society
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• v.26 no.2
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• pp.429-440
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• 2015

This study was to investigate factors influencing the school adjustment according to gender and body mass index (BMI) of middle school students who participated in the 2nd-wave Korea Children and Youth Panel Study (KCYPS). This study used a crosssectional design with secondary analysis with KCYPS. The variables were parental interest, behavioral problem, aggression, attention problem, somatic symptom, social withdrawal, depression, and academic achievement. The data were analyzed with descriptive statistics, Pearson's correlation coefficients, and multiple regressions. School adjustment was significantly associated with academic achievement high, explaining 11.3~19.1% of the variance in boys. School adjustment was significantly associated with attention problem, explaining 14.9~42.4% of the variance in girls. Factors influencing school adjustment were significantly different according to gender and BMI. To improve the school adjustment, it is necessary to develop gender-specific school adjustment promotion programs according to BMI.

• The Journal of the Korea Contents Association
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• v.13 no.4
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• pp.218-229
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• 2013

With the increase of the aging population in Korea, the welfare of Korean elderly has become one of main concerns of the society. One essential factor that may enhance the quality of life of the elderly is the active social participation. Involvement in the volunteer activity is one form of social participation that benefits both society and individual. The purpose of this study is to examine the level of Korean elderly's participation in volunteer activities and factors related to their participation in the context of different age group. People aged 55 and over from wave 2 data of Korean Longitudinal Study of Ageing are grouped into pre-old(55-64), young old(65-75), and old old (75 and older). Main analytic tools include descriptive statistics and logistic regression analysis. Results indicated that social relationships of the elderly were the most important factors related with their participation with voluntary activities. Also highlighted is the importance of considering the diversity among the older population.

• The Korean Journal of Applied Statistics
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• v.28 no.2
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• pp.201-210
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• 2015

Repeated measurements on each variables of interest often arise in bioscience or medical research. We need to account for correlations among repeated measurements to assess the correlation between two variables in the presence of replication. This paper reviews methods to estimate a correlation coefficient between two variables in repeated measurements using the variance-covariance matrix of linear mixed effect models. We analyze acoustic radiation force impulse imaging (ARFI) data to assess correlation between three shear wave velocity (SWV) measurements in liver or spleen and spleen length by ultrasonography. We present how to obtain parameter estimates for the variance-covariance matrix and correlations in mixed effects models using PROC MIXED in SAS.

• Health Policy and Management
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• v.22 no.4
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• pp.497-521
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• 2012

Objectives This study aimed to investigate the effect of social capital, health risk behavior and health status on medical care utilization by the elderly. The data and Research method Data were obtained from the 4th wave survey of the Korea Welfare Panel Study. 4,087 household members aged 65 years and over were subject to analysis. Descriptive statistics are used to describe the basic features of the data in a study. we performed a structural equation modeling(SEM) analysis to evaluate the effect of social capital and mediating effect of health risk behavior and health status. Results Results showed that factors related to medical care utilization of the elderly were different depending on types of service (inpatient and outpatient service) except health status. Age, higher social capital, more health-risk behavior and poorer health status were associated with increased use of inpatient service. Social capital was found to have a positive direct effect on it. Also, social capital had an indirect effect on reducing use of inpatient services by improving health status. On the other hand, lower age and higher household income tended to increase use of outpatient service, while higher social capital and higher health status were inversely related. Social capital had a direct effect and an indirect effect on reducing use of outpatient service and, at that time, health status played a mediating role. Conclusions Social capital may contribute to improve health status and indirectly reduce medical care utilization of the elderly by enhancing their health status. These results provide evidence that more policy and strategy considerations should be needed for the elderly to strengthen their social capital in order to enhance their levels of health and more efficient utilization of medical care.

• 한국노년학
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• v.38 no.4
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• pp.923-943
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• 2018

This study was conducted to verify whether gender role attitudes are related to depression in Korean older males and examine the mediating effect of family conflict coping strategies on the relationship between the two variables. In this study, The target of the study was 1,955 men aged 65 and over in the 9th wave of the Korea Welfare Panel Study (KoWePS). Frequency analysis, descriptive statistics, correlation analysis, and multiple regression analysis were performed. In addition, Bootstrapping was conducted to verify the significance of the mediating effects of family conflict coping strategies. The results of this study show that patriarchal gender role attitudes of Korean older males were found to be associated with increased risk of depression. Family conflict coping strategies play a role as a mediator for the relationship between gender role attitudes and depression. Throughout the results of this study, the restructuring of gender role attitudes and the improvement of the way of coping with family conflict were suggested as measures to alleviate the depression of the older males, and academic and practical implications were discussed.

• Journal of Convergence for Information Technology
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• v.8 no.6
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• pp.327-333
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• 2018

This study is to find ways to improve the daily life satisfaction of people with disability through interpersonal relation and self-efficacy. Descriptive statistics, correlation analysis and regression analysis by SPSS 21.0 were applied to 1,483 out of 4,400 of Penal Survey of Employment for the Disabled 2nd Wave. The study show that the interpersonal relation had a positive effect on self-efficacy and daily life satisfaction. Self-efficacy influenced positive effect to life satisfaction and played a mediating role between interpersonal relation and daily life satisfaction. Based on the conclusion that daily life satisfaction can be enhanced through the improvement of interpersonal relations and self-efficacy, this study made policy suggestions to improve interpersonal relations and self-efficacy.

• Journal of the Korea Convergence Society
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• v.10 no.8
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• pp.165-170
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• 2019

According to the statistics of the Ministry of Land Transport and Transportation in 2018, the average annual average number of air traffic users for has increased by 5.07% for domestic flights and 8.84% for international flights. Korea is facing a steady rise in demand from foreign tourists due to the Korean Wave. At the same time, a new lifestyle that values the quality of life of individuals is taking root, along with the emergence of LCC, and Korean tourists' overseas tours are also increasing, so improvement and expansion of domestic airport passenger terminals is urgently needed. it is important to develop a structured airport infrastructure by making efficient and accurate forecasts of aviation demand. in this study, based on the Big Data, long-term domestic and international demand forecasts for urban airports were conducted.. Domestic flights will see a decrease in the number of airport passengers after 2028, and international flights will continue to increase. It is imperative to improve and expand passenger terminals at domestic airports.

• Asia-Pacific Journal of Business
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• v.11 no.3
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• pp.307-344
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• 2020

Purpose - The purpose of this study is to examine effects of productization and organizational competences on export performance of electromagnetic shielding companies and to analyze moderating effects of overseas market adaptation competences. For this, hypotheses were established by reviewing previous studies and an empirical analysis was conducted for testing. Design/methodology/approach - For this study, a survey was conducted for workers at electromagnetic shielding companies and 250 valid responses out of 300 questionnaires were aquired. A frequency analysis of related variables was conducted. Through an exploratory factor analysis, validity and reliability tests of measuring tools were conducted and a descriptive statistics was analyzed for collected data result and hypotheses testing. Findings - A correlation analysis was conducted to examine relationships among variables. Construct, convergent and discriminant validities were analyzed after a confirmatory factor analysis and a multi-group confirmatory factor analysis. Finally, with a verified model, the hypotheses and the moderating effects were tested. The results are as follows: First, the productization competence has a positive effect on export performance; Second, the organizational competence has a positive effect on export performance. Especially, the organizational competence has more effect on export performance than the productization competence. Although a development of new technology and product is important in terms of performance, along with these competences, a way of acquiring new skills and knowledge, and internalization and adaptation in organizations have more effect on export performance. Third, overseas market adaptation competence moderates effects of organizational and productization competences. Research implications or Originality - It is necessary to seek out opportunities for workers to participate in actively, such as conferences and seminars, to strengthen organizational competence. It is strongly believed that a constant development of high quality product will contribute to export performance. Lastly, in a policy level, supports on SMEs by governments are to be strengthened by providing with finance and human resource.