• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.22 no.2
• /
• pp.248-258
• /
• 2021

The study analyzed the financial determinants of corporate R&D intensity that require more attention from academics and practitioners in the Korean capital market. Domestic small and medium enterprises (SMEs) may face with developing substitutes by making more R&D investments in scale and scope, given the unprecedented economic conditions such as the limitation of importing core components and materials from other nation(s). KOSDAQ-listed SMEs were selected as sample data, whose R&D expenditures may be less than those of large firms during the post-global financial turmoil period (2010~2018). Static panel data model was applied, along with Tobit and stepwise regression models, for examining the validity of results. Logit, probit, and complementary log-log regressions were also employed for a relative analysis. R&D expenditures in the prior year, the interaction effect between the previous R&D intensity and high-tech sector, firm size, and growth rate were significant to determine R&D intensity. Moreover, a majority of explanatory variables were found to change between the years 2011 and 2018, while time-lagged effects between the R&D intensity and growth rate exist. Results of the study are expected to be used for future research to detect optimal levels of R&D expenditures for the value maximization of SMEs.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.12
• /
• pp.790-797
• /
• 2020

This study aimed to identify the effects of adolescents' self-perceived health on their life satisfaction and verify the mediating effects of the relationship between the two factors. The analysis was conducted using the Korean Children and Youth Panel Study (KCYPS, Ed. 6), and the results are as follows. In terms of the factors, the mean value of the adolescents' self-perceived health was 3.13, which was regarded as a moderate level, while the values of life satisfaction and self-esteem were 2.80 and 2.90, respectively, which were regarded as low levels. An analysis of the study model showed that the adolescents' self-perceived health affected their life satisfaction, and self-esteem played a meditating role in such a relationship. In other words, a higher level of self-perceived health would help improve self-esteem, which would promote a level of life-satisfaction. Therefore, this study has implications that healthcare or psychological/ emotional resources have been identified to influence adolescents' life satisfaction. Furthermore, multidimensional interventions are needed to reinforce the individuals' psychological and develop emotional resources in healthcare or welfare fields. Moreover, efforts are needed to enhance the adolescents' self-perceived health that would affect their life satisfaction.

• Journal of Industrial Convergence
• /
• v.19 no.4
• /
• pp.95-102
• /
• 2021

This study aims to verify the effect of mother's career-related behavior on the intention of multicultural youths to school dropout intention and the mediating effect of academic adaptation. To this end, 1,121 middle school seniors were sampled in the 7th (2017) data of the Multicultural Youth Panel Survey, and the influence relationship of the model presented as a three-step method of analysis of the mediated effects of Baron & Kenny and the Sobel test were conducted. First, the analysis showed that mother's support, a subfactor of mother's career-related behavior, had a negative effect on dropout intention, and that mother's interference had a positive effect. Second, academi adaptation has been shown to have a negative effect on dropout intention. Third, mother's support, a subfactor of mother's career-related behavior, showed a positive influence on academi adaptation, and mother's interference showed a negative effect. Fourth, academi adaptation has been shown to be mediated in the relationship between career-related behavior and dropout intention. Based on the above results, practical implications were presented.

• Composites Research
• /
• v.35 no.5
• /
• pp.303-308
• /
• 2022

PIC (Piecewise Integrated Composite) is a new concept for designing a composite structure with mosaically assigning various types of stacking sequences in order to improve mechanical properties of laminated composites. Also, machine learning is a sub-category of artificial intelligence, that refers to the process by which computers develop the ability to continuously learn from and make predictions based on data, then make adjustments without further programming. In the present study, the tapered box beam type PIC robot arm for carrying and transferring wide and thin LCD display was designed based on the machine learning in order to increase structural stiffness. Essential training data were collected from the reference elements, which were intentionally designated elements among finite element models, during preliminary FE analysis. Additionally, triaxiality values for each finite element were obtained for judging the dominant external loading type, such as tensile, compressive or shear. Training and evaluating machine learning model were conducted using the training data and loading types of elements were predicted in case the level accuracy was fulfilled. Three types of stacking sequences, which were to be known as robust toward specific loading types, were mosaically assigned to the PIC robot arm. Henceforth, the bending type FE analysis was carried out and its result claimed that the PIC robot arm showed increased stiffness compared to conventional uni-stacking sequence type composite robot arm.

• The Journal of the Korea Contents Association
• /
• v.21 no.12
• /
• pp.490-504
• /
• 2021

In order to analyze the factors influencing career maturity of general high school students, this study verified the moderated mediating effect of career exploration efficacy by the frequency of conversation with parents in the process of self-awareness and class attitude affecting career maturity. For the study of the second year of general high school, the results of verifying the moderated mediating effect using SPSS 22 and Model 7 of PROCESS macro from the results of the first year survey of the Korea Education and Employment Panel (KEEP) II are as follows. First, positive self-awareness and class attitude had a positive effect on career maturity. Second, career exploration efficacy mediates self-awareness, class attitude, and career maturity. Third, in the relationship between self-awareness and career maturity, there is no moderated mediating effect on career exploration efficacy by the frequency of conversation with parents. Fourth, in the relationship between class attitude and career maturity, a confrontation-moderated mediating effect on career exploration efficacy by conversation frequency with parents appears. Based on these studies, implications and future tasks for career maturity of general high school students were proposed.

• Journal of the Korea Convergence Society
• /
• v.12 no.4
• /
• pp.267-274
• /
• 2021

This study used data from the 6rd and 12th year of the Korean Welfare Panel to evaluate the effects of the Personal Assistance Service(PAS) system on the labor market of PAS users' participation. For the purpose of this study, 64 program groups using the Korean PAS and 344 control groups not using the Korean PAS were selected using Caliper matching among the propensity score matching. A chi-square test was used for the difference in characteristics between groups, and a simple difference-in-differences (DID) model and a double-difference multiple regression analysis of DID were performed to estimate the effect of thepolicy before and after the Korean PAS. As a result of the study, it was found that statistically, PAS had no significant effect on the labor market. This is due to the low number of system users, resulting in low post-hoc power, incomplete matching and limited availability of PAS Assistants for Disabled People. Therefore, In order to demonstrate the effectiveness of the Personal Assistance Service(PAS) system, specialized services and systems that meet the needs of the disabled and household members should be implemented.

• Journal of Family Resource Management and Policy Review
• /
• v.26 no.2
• /
• pp.19-36
• /
• 2022

The purpose of this study was (a) to identify latent profiles among employed Korean mothers of third graders based on work-family conflict, work-family enrichment, work-parenting conflict, and work-parenting enrichment, (b) to examine the antecedents of profile membership at the individual, family, work, and community levels, and (c) to investigate the differences in the various psychological outcomes across the profiles. The sample of 451 married employed mothers was a subset of data from the 10th Wave of the Panel Study of Korean Children, which was collected in 2017 when the focal child was in the third grade. Our latent profile analysis suggested a three-profile model that comprised enriched (11.91%), moderate (47.85%), and mixed (40.24%) profiles. The significant antecedents of profile membership were subjective health status, the child's adjustment to school, working hours, the community's suitability for childrearing, and satisfaction with community service facilities. Regarding psychological outcomes, the levels of life satisfaction, marital satisfaction, and job satisfaction were higher in the following order: enriched, moderate, and mixed profiles. The levels of depressive symptoms were in the reverse order: mixed, moderate, and enriched profiles. This study contributes to a comprehensive understanding of the literature on work-family interactions by considering various predictors and outcomes at multiple levels.

• Korean Journal of Culture and Social Issue
• /
• v.21 no.2
• /
• pp.131-158
• /
• 2015

This study examined the relationship between physical education and externalizing(aggression) and internalizing(depression, social withdrawal) problem behaviors among adolescents. The moderating role of gender and time in the association between physical education and problem behavior was also identified. This study used data from the second, third, and fourth waves of the middle school student cohort (N=2,133, N=2,151, N=1,979) of the Korean Children-Youth Panel Survey(KCYPS). Main analyses involved multilevel growth model with interaction terms. The dependent variables were aggression, depression, and social withdrawal. The independent variables were gender and physical education (exercise hours) at school. The control variables were abuse, school-adjustment, annual household income and parents' highest level of education. The major longitudinal findings of this study are as follows: First, there was significant change according to the passage of time only in aggression among externalizing and internalizing problems. Second, gender differences exist in aggression and depression. Third, exercise hours of physical education had a negative relationship with internalizing problems. Fourth, there were no gender differences over time in both externalizing and internalizing problems. Fifth, the interaction between exercise hours of physical education and time was statistically significant for social withdrawal. Sixth, the interaction between exercise hours of physical education and gender was statistically significant for depression. The results of this study may become an academic basis for suggesting policy directions that promote increased exercise hours in physical education classes at school.

• Journal of Advanced Technology Convergence
• /
• v.2 no.1
• /
• pp.33-40
• /
• 2023

This research multilaterally analyzed the frequency of use of OTT service and its effect on life satisfaction for office workers of the MZ generation using the survey data of the Korean Media Panel. Recently, the OTT service market has grown rapidly, but there is a lack of research on what changes these changes have brought to the lives of the MZ generation. In this research, the frequency of OTT service use was investigated according to the characteristics of workers in the MZ generation, and a research model was set up to test whether the frequency of use affects life satisfaction. In fact, the frequency of use varied according to the gender and age group of the MZ generation, and it was found that the frequency of use also affected life satisfaction. It has an academic contribution in that it was the first to study the relationship between media content use patterns and life satisfaction. In the future, additional research is possible not only on the frequency of use, but also on the type of OTT content and the time of use of OTT service.

• Korea Trade Review
• /
• v.42 no.1
• /
• pp.165-188
• /
• 2017

Foreign direct investment is the means for companies to enter the overseas market and strengthen their competitiveness. The holding of intellectual properties, representing advantages of firms, may affect foreign direct investment. By expanding previous studies, we define intellectual properties as including trademarks and design as well as patents. Using a random-effect panel data model, we examine the effects of both intellectual properties of Korea and host countries on Korea's foreign direct investment in 128 countries from 1981 to 2014. The results are as follow. First, the coefficients of Korea's intellectual properties, patent, trademark, and design are significantly positive. This implies that Korean firms may invest abroad to take their advantages of technologies, brand value, and the capability of product differentiation. Second, except for patents, intellectual properties of host countries have a positive impact on foreign direct investment. In other words, foreign direct investment to acquire the ability of branding or product design from host countries may occur. Third, the coefficients of Korea's intellectual properties are significantly greater than those of host countries' properties. Foreign direct investment to take advantages of the firms' capabilities overseas is greater than one to acquire knowledge of host countries. Finally, Korea's intellectual properties have a greater positive impact on foreign direct investment in high growth countries than in low growth countries. It is interpreted that Korean firms are more motivated to exploit their intellectual properties in developing countries with a high growth than developed countries. Overall, it is confirmed that Korea's foreign direct investment not only to utilize some advantages but also to seek the brand value or product differentiation ability from host countries can occur. Our findings provide the contribution that some innovative activities in firms and R&D investments policies which encourage the possession of intellectual properties can improve foreign direct investment.