• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.47 no.8
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• pp.566-573
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• 2019

In order to obtain high-quality images by motion compensation in the airborne synthetic aperture radar (SAR), accurate motion sensing in image acquisition section is necessary. Especially, reducing relative position error and discontinuity in motion sensing is important. To overcome the problem, we propose a pre-parametric error modeling (P-PEM) algorithm which is a real-time motion sensing algorithm for the airborne SAR in this paper. P-PEM is an extended version of parametric error modeling (PEM) method which is a motion sensing algorithm to mitigate the errors in the previous work. PEM estimates polynomial coefficients of INS error which can be assumed as a polynomial in the short term. Otherwise, P-PEM estimates polynomial coefficients in advance and uses at image acquisition section. Simulation results show that the P-PEM reduces relative position error and discontinuity effectively in real-time.

• Korean Journal of Family Social Work
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• no.56
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• pp.225-250
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• 2017

The purpose of this research was to investigate the impact of the social capital among married female immigrant on their quality of life and the mediating effect of empowerment. The data were collected from 260 married female immigrants and SPSS Statistics 20.0 and AMOS 22.0 were utilized to analyze the data. The results showed that social capital had statistically significant relationship with empowerment and quality of life among married female immigrants. In addition, empowerment was a statistically significant mediator in the association of social capital and quality of life. Based on these findings, the implications for social welfare practice to improve social capital and empowerment of married female immigrants and recommendations for the further studies were suggested.

• Journal of Korea Technology Innovation Society
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• v.21 no.4
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• pp.1536-1576
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• 2018

This study aims at investigating the path in which entrepreneurial orientation and absorptive capacity, which have a significant influence on the corporate performance of SMEs, are mediated through product innovation performance (product speed, product quality). For the empirical study, 233 questionnaires collected from 1775 SMEs including in Daejeon Techno Park start-ups were analyzed by using structural equation model. The empirical analysis shows that absorptive capacity and entrepreneurial orientation have a positive effect on performance through product innovation performance. Therefore, it is suggested that entrepreneurial orientation and absorptive capacity increase product innovation performance in terms of corporate strategy and external information utilization capability, and product innovation performance leads to performance. This paper suggests that entrepreneurial strategy and capacity to utilize external information are important for introducing high quality products faster than others in response to the external environment.

• The Journal of the Korea Contents Association
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• v.21 no.4
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• pp.533-544
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• 2021

This study was focused on social stigma in utilizing community child centers which are selective child welfare institutions. The study model derived from the stress process model. The purpose of this research was to investigate the effects of stigma on happiness among children in community child centers and mediating effects of empowerment and community social capital as coping resources. The data were collected from 5, 6th grade students who are attending community child centers located in Daegu and Gyeongsan city. Data of 175 were analyzed and SPSS Process Macro and bootstrapping method were used. The results of the study were follows. First, stigma among children in community child centers showed significant direct effects on happiness. Second, empowerment and community social capital had significant mediating effects on the relationship between stigma and happiness. Based on the results, the policy and practice implications to improve happiness of children in community child centers were suggested.

• The Journal of the Korea Contents Association
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• v.21 no.8
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• pp.498-506
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• 2021

This study identified the relationship between perceived mother-grandmother conflicts and subjective well-being among multicultural children, and examined the double mediating model of acculturative stress and adjustment to school life on that relationship. Participants were 205 male and female adolescents living at J county in Gangwon-do. PROCESS Macro 3.5 Model 6 was used for analysis of a double mediating effect. Results revealed that perceived mother-grandmother conflicts was positively correlated with acculturative stress of multicultural children, and negatively correlated with adjustment to school life and subjective well-being. And, acculturative stress of multicultural children was negatively correlated with adjustment to school life and subjective well-being, whereas adjustment to school life was positively correlated with subjective well-being. This study found that acculturative stress and adjustment to school life were sequentially mediating perceived mother-grandmother conflicts and subjective well-being of multicultural children. These findings suggest that the perceived mother-grandmother conflicts might cause multicultural children to experience acculturative stress, and as a result, their subjective well-being level might be reduced due to their low adjustment to school life.

• The Journal of the Korea Contents Association
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• v.21 no.8
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• pp.285-293
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• 2021

This study aims to identify the relationship between outcome expectancy and illegal use of music sources, and examined the parallel double mediating model of reward sensitivity and social dilution of responsibility on that relationship. To achieve the purpose this study, data were collected from 302 male and female high school students living in Seoul metropolitan area, and a double mediating effect was analysed with PROCESS Macro 3.5 Model 4. Results indicated that outcome expectancy was positively correlated with reward sensitivity, social dilution of responsibility, and illegal use of music sources of high school students, whereas reward sensitivity and social dilution of responsibility were positively correlated with illegal use of music sources. This study found that reward sensitivity and social dilution of responsibility were mediating outcome expectancy and illegal use of music sources in parallel. These findings suggest that psychological mechanisms lead adolescents use illegal music sources might be important, and provide useful information for making strategies to prevent adolescents' uses of illegal music sources.

• Journal of the Korea Convergence Society
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• v.13 no.4
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• pp.185-194
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• 2022

This study tried to understand the mediating role of stress perception and the moderating role of mindfulness in the process of psychological alienation affecting college students' smartphone addiction tendency. Two hundred seventeen university students from Chungcheongnam-do answered the questionnaire. The research model was analyzed with model 7 of Hayes' PROCESS Macro 4.0. When synthesizing analysis results, feelings of alienation mediate stress responses or directly influence smartphone addiction tendencies. At this time, people with high levels of mindfulness tended to lower their smartphone addiction tendencies by alleviating their stress response compared to those with a low level of mindfulness. The implication of this study is that it revealed the psychological process that causes alienation to induce smartphone addiction tendency through stress responses, and that mindfulness plays a role in alleviating stress response and lowering smartphone addiction tendency. In the future, it is necessary to apply the model of this study to people diagnosed with smartphone addiction.

• The Journal of the Korea Contents Association
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• v.22 no.4
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• pp.190-198
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• 2022

In the food market, kiosks are rapidly expanding. The kiosk improves the in-store consumer experience and economic prosperity of businesses. This research explores the continuance use intention of kiosks via a post-acceptance model with four antecedent variables: perceived usefulness, perceived ease of use, confirmation, and satisfaction. An online survey was conducted with 420 senior consumers, aged 50-70, who have experienced kiosk services. This study used SPSS 25.0 for descriptive analysis and Amos 23.0 for confirmatory factor anlysis, structural equation analysis, and mediate the effect of the bootstrapping method. The following results were obtained. First, perceived usefulness and confirmation significantly influenced satisfaction with kiosks. Second, perceived usefulness and satisfaction significantly influenced continuance use intention. Third, satisfaction mediated the relationship between perceived usefulness and continuance use intention. Fourth, satisfaction mediated the relationship between confirmation and continuance use intention. These findings enhanced the understanding of seniors' attitude and response to kiosk services.

• Journal of Convergence for Information Technology
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• v.12 no.4
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• pp.14-22
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• 2022

This study was conducted to promote male nursing students' adaptation to college life by identifying life stress, grit, and degree of adaptation to college life, and the effect of grit mediating effect on the relationship between life stress and college life adjustment. became The subjects of this study were 209 male nursing college students enrolled in nursing departments in 5 major cities. The collected data were analyzed with SPSS/WIN 25.0. Life stress showed a significant negative correlation with college life adaptation and grit, but grit showed a positive correlation with college life adaptation. As a result of mediating effect verification, the final model explained 43.5% of college life adaptation. Therefore, in order to improve male nursing students' adaptation to college life, it is required to develop a program that can lower life stress and increase grit and college life adaptation level.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.5C
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• pp.239-250
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• 2009

Tunnelling-induced settlements and lateral ground movements have been investigated by numerical parametric studies considering ground condition, excavation characteristics, and ground layers. Before the numerical study the existing methods of ground movement estimation have been collected and analysed to have some information of ground movements and to improve them providing a fundamental material for the numerical study. Numerical model simulation has been performed of a physical model test of tunnel excavation in which the ground movements were measured reliably and the results have been used to determine the numerical approach and the appropriate soil constitutive mode. With this procedure done, the results of numerical parametric studies have been put together to analyze and understand tunnelling-induced settlements and lateral ground movements.