• Proceedings of the Population Association of Korea Conference
• /
• 2006.12a
• /
• pp.131-152
• /
• 2006

This study examines the causal mechanisms of low fertility and regional differentials in Korea. Utilizing the 2005 census and the 2005 vital statistics, and labor statistics at the regional level, major variables were calculated for administrative units of 234 'Gu's, 'Si's and 'Gun's. Gender equity orientation, labor market insecurity and family formation were hypothesized as key factors of recent decline in Korean fertility. This study first presents four maps of gender equity orientation, labor market insecurity, family formation and fertility. Then ANOVA and path analysis were carried out in an effort to generalize the causal mechanisms. Results of analysis reveal that gender equity orientation has played a central role in the second fertility transition in Korea. In metropolitan regions, however, labor market insecurity is found to have a significant influence on the level of family formation and fertility. Family formation also turns out to be an important intermediate variable of fertility.

• Journal of Convergence for Information Technology
• /
• v.10 no.11
• /
• pp.313-323
• /
• 2020

This study is to examine the mediating effects of parenting efficacy the relation between the self-esteem and child career support behavior(encourage, meddle, non-involvement) of mothers of multicultural families. To this end, data from the 7th year's multicultural youth-parent panel were used, and descriptive statistics, correlation analysis, and regression analysis were conducted on the data of 1,188 married immigrant women. The result of the analysis showed that self-esteem (β=.277) and parental efficacy (β=.134) were positively significant as factors affecting the child career support behavior of mothers of multicultural families. In addition, parental efficacy was found to provide partial mediation in the relationship between self-esteem and child career support behavior. Based on this, this study suggested policy and practical measures to improve parental efficacy of mothers of multicultural families and to conduct desirable child career guidance.

• Journal of Science Education
• /
• v.35 no.1
• /
• pp.59-67
• /
• 2011

The purpose of this study was to analyze on the relations of motivation system about science learning and science achievement. TIMSS 2007 was selected and translated for science achievement test. After that, fourth-grade 496 students and eighth-grade 425 students were required to accomplish the questionnaire on behavioral inhibition/activation system about science learning(SL-BIS/BAS) and science achievement. There were negative correlation with SL-BIS and science achievement, and positive correlation with SL-BAS and science achievement. In addition, two systems account for 12% of science achievement. These results would be helpful for teachers to understand the difference about motivation by students' variables and to make a plan for the appropriate strategies for learners.

• Journal of KIISE
• /
• v.42 no.5
• /
• pp.558-565
• /
• 2015

Recently, the number of new malware and malware variants has dramatically increased. As a result, the time for analyzing malware and the efforts of malware analyzers have also increased. Therefore, malware classification helps malware analyzers decrease the overhead of malware analysis, and the classification is useful in studying the malware's genealogy. In this paper, we proposed a set of key opcode to classify the malware. In our experiments, we selected the top 10-opcode as key opcode, and the key opcode decreased the training time of a Supervised learning algorithm by 91% with preserving classification accuracy.

• Journal of Intelligence and Information Systems
• /
• v.13 no.2
• /
• pp.69-80
• /
• 2007

The preferences of customers change over time. However, existing collaborative filtering (CF) systems are static, since they only incorporate information regarding whether a customer buys a product during a certain period and do not make use of the purchase sequences of customers. Therefore, the quality of the recommendations of the typical CF could be improved through the use of information on such sequences. In this study, we propose a new methodology for enhancing the quality of CF recommendation that uses customer purchase sequences. The proposed methodology is applied to a large department store in Korea and compared to existing CF techniques. Various experiments using real-world data demonstrate that the proposed methodology provides higher quality recommendations than do typical CF techniques with better performance.

• The Journal of the Korea Contents Association
• /
• v.21 no.3
• /
• pp.676-684
• /
• 2021

This study aims to investigate the relationship between depression, internet addiction, and parenting style. The study also examines the mediating effect of parenting style between depression and internet over-dependency. For these purposes, 375 adolescent, excluding missing values, were finally analyzed from the 13th Korea Welfare Panel Study(KWPS). Correlation analysis, mediationg analysis performed using SPSS(21.0 version). The findings of the study were as follows. First, it was identified that parental participation significantly mediated the relationship between depression and internet over-dependency. Second, it was identified that child abuse significantly mediated the relationship between depression and internet over-dependency. Based on the study results, this research suggested the practice and policy implications to increase depression, especially parental participation, to the adolescent as well as to decrease their child abuse.

• Journal of the Korea Convergence Society
• /
• v.13 no.2
• /
• pp.115-122
• /
• 2022

This study was conducted to find out the factors influencing the subjective perception of some students majoring in dental hygiene. An online survey was conducted on 292 enrolled students, and the data were analyzed using SPSS 22.0. As a result of multiple regression analysis of the factors influencing subjective perception, the factors that significantly influence were positively influenced by admission according to general satisfaction, subject satisfaction, and aptitude. Therefore, it is necessary to improve the subjective perception of enrolled students through improvement of various factors. To this end, it is considered necessary to raise positive awareness and provide customized employment guidance by establishing various education and counseling support programs suitable for the subjects through continuous research in the future.

• The Journal of the Convergence on Culture Technology
• /
• v.9 no.2
• /
• pp.407-412
• /
• 2023

We attempted to confirm the current status of the use of mobile phones by soldiers, especially SNS, in today's situation where the use of mobile phones is completely allowed, and to reach an agreement for the use of functional SNS in military life. To this end, 189 students at the Korea Army Academy at Yeongcheon were measured for SNS use motivation and life satisfaction, and the relationship between each sub-variable of SNS use motivation and satisfaction was analyzed. As a result, 3 out of 4 motives for using SNS had nothing to do with satisfaction, and rather, among the sub-variables, the pursuit of status showed a negative correlation with satisfaction. Therefore, the use of SNS to search for information or ideas should be encouraged. In addition, these findings prove that the vague belief that allowing SNS will increase the satisfaction of soldiers is not reasonable, suggesting that a careful approach is required to utilize functional SNS in the military.

• Journal of Aerospace System Engineering
• /
• v.18 no.2
• /
• pp.56-63
• /
• 2024

As the safety of unmanned vehicles continues to improve, their usage in urban environments, which are full of obstacles such as buildings, is expected to increase. When numerous unmanned vehicles are operated in such environments, an algorithm that takes into account mutual collision avoidance, as well as static and dynamic obstacle avoidance, is necessary. In this paper, we propose an algorithm that handles task assignment and path planning. To efficiently plan paths, we construct a grid-based map and derive the paths from it. To enable quick re-planning in dynamic environments, we focus on reducing computational time. Through simulation, we explain obstacle avoidance and mutual collision avoidance in small-scale problems and confirm their performance by observing the entire mission completion time (Makespan) in large-scale problems.

• Journal of Gifted/Talented Education
• /
• v.23 no.5
• /
• pp.751-769
• /
• 2013

This study aims to compare the difference between the recognition of professionalism and teaching efficacy of the gifted education teacher by majoring in education for the gifted from the graduate school. The subjects were 44 graduate students in gifted education major and 56 gifted education teachers of elementary school who did not major in the education for the gifted. The results were as follows. First, the education for the gifted children majors showed higher statistical significance in the subject knowledge, the instructional strategies, the understanding gifted student, personal efficacy and outcome expectancy than the teacher who did not major in the education for the gifted children (p<.05). Second, in the results of Two-Way ANOVA by the major status in education for the gifted children and the gender, there was the interaction effects in the subject knowledge, the understanding gifted student, personal efficacy, and the females were influenced by the recognition of professionalism and teaching efficacy by the major status in education for the gifted children more than males. In the results of analysis on the major status in education for the gifted children and career for gifted education, the instructional strategies and personal efficacy showed the significant interaction effect (p<.05). Third, in the results of analysis on the relations between the recognition of professionalism and the teaching efficacy, all subordinate scopes of the recognition of professionalism and teaching efficacy showed the significant positive correlation (p<.05). In the results of the multiple regression analysis, the subject knowledge and the instructional strategies have effects on the personal efficacy. So the majoring in education for the gifted children from the graduate school may have significant effects on development of the subject knowledge and the professionality of the instructional strategies of the gifted education teacher, further, it can be said that has positive effect on teaching efficacy.