• Proceedings of the Korean Magnestics Society Conference
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• 2011.12a
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• pp.142-143
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• 2011

• Proceedings of the Korean Magnestics Society Conference
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• 2003.06a
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• pp.210-211
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• 2003

• Journal of the Economic Geographical Society of Korea
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• v.11 no.3
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• pp.492-507
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• 2008

Many classical network analysis methods approach networks in aspatial perspectives. Measuring network reliability and finding critical nodes in particular, the analyses consider only network connection topology ignoring spatial components in the network such as node attributes and edge distances. Using local network autocorrelation measure, this study handles the problem. By quantifying similarity or clustering of individual objects' attributes in space, local autocorrelation measures can indicate significance of individual nodes in a network. As an application, this study analyzed internet backbone networks in the United States using both classical disjoint product method and Getis-Ord local G statistics. In the process, two variables (population size and reliability) were applied as node attributes. The results showed that local network autocorrelation measures could provide local clusters of critical nodes enabling more empirical and realistic analysis particularly when research interests were local network ranges or impacts.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.411-411
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• 2017

유역 내 발생하는 강우의 공간적인 분포는 인접성 및 거리에 따라 달라질 수 있다. 공간자기상관 분석은 공간단위(유역 또는 행정구역)의 변수(강수 등)가 주변지역과 갖는 관계를 통해 얼마나 분산되어 있는지 혹은 군집되어 있는지를 판별하는 기법으로 최근 많은 연구에서 활성화 되고 있다. 본 연구에서는 낙동강유역을 대상으로 1980~2000년까지 20개년의 기상청을 통해 수집한 강우자료와 CMIP5(Coupled Model Intercomparison Project Phase 5)에서 제공하는 기후변화 자료 중 가용할 수 있는 20개 모델의 강우를 수집하였다. 기후변화 자료는 정상성 분위사상법으로 지역오차보정을 실시하고 불확실성을 저감하고자 베이지안 모델 평균기법을 통해 새로운 시계열을 생성하였다. 생성된 시계열의 공간적인 분포를 정량적으로 평가하고자 중권역별 공간자기상관 분석을 수행하였다. 대부분의 연구에서는 GIS를 활용하여 정성적으로 강우의 분포를 나타내고 있지만 본 연구에서는 공간단위의 인접성 또는 거리에 따른 척도를 기반으로 공간자기상관을 탐색할 수 있는 Moran's I와 LISA(Local Indicators of Spatial Association)기법을 적용하였다. Moran's I는 전체 연구지역에 대한 관계를 하나의 값으로 보여주는 전역적인 기법이며, LISA는 상대적으로 넓은 지역을 국지적으로 구분하여 특정지역에 대한 Hot spot 및 Cold spot을 통해 공간자기상관 정도를 나타내는 국지적인 기법이다. 두 기법을 적용하기 위하여 인접성 기반의 공간매트릭스를 산정하고 계절별 관측값과 베이지안 앙상블 강우의 Moran's I 및 LISA 분석을 실시하였다. 관측자료와 베이지안 앙상블 강우의 분석결과가 매우 유사하게 나타남으로써 베이지안 앙상블 강우의 공간적인 분포가 관측강우를 충분히 재현하고 있다고 판단된다.

• Proceedings of the Korean Magnestics Society Conference
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• 2002.12a
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• pp.238-239
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• 2002

현대의 영구자석들은 Alnico 주조자석을 제외하고는 모두 자성분말을 이용한 분말야금학적인 소결자석 또는 본드자석 형태로 제조된다. 따라서 자성분말의 형상, 크기, 입도, 순도, 조성 등이 자석의 자기적 특성을 우선적으로 결정하며, 이러한 구조적, 화학적 인자들은 영구자석의 고성능화를 위해 자성분말 또는 결정립이 초미세화 함에 따라 자기 특성을 결정하는 더욱 중요한 요소로 작용하고 있다. 그러므로 이들 인자와 자기적 특성간의 상관관계를 정확히 규명하고 보다 잘 이해하는 것이 극대화된 자기 특성을 갖는 자성체를 개발하는데 절대적으로 필요하다. (중략)

• Journal of Digital Convergence
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• v.18 no.11
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• pp.311-318
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• 2020

This study was done to explore the correlation among self-determination, learning commitment and learning outcomes and identify factors related learning outcomes under academic credit bank system. The survey was conducted self-report questionnaire. The data collection period was form April to November 2018. Participants were 144 registered nurses working currently under academic credit bank system. Collected data were analyzed using SPSS/WIN 24.0. Learning outcomes had a positive correlation with self-determination and learning commitment. learning commitment. Self-determination was positively correlated learning commitment. Factors affecting learning outcomes included self-determination and learning commitment. And self-determination and learning commitment accounted for 32.1% of the variance in learning outcomes. Therefore, developing learning outcomes support for improving self-determination and learning commitment. Future research will be needed to clarify the effects of learning outcomes promotion program on self-determination and learning commitment.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.497-511
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• 2019

The purpose of this study is to examine the effects of entrepreneurship and personal characteristics on entrepreneurial intention and to analyze what factors influence the entrepreneurial intention through the moderating effects of social networks. So, the survey was conducted on 374 employees in their 30s or older. Descriptive statistics were used to understand the actual state of entrepreneurial intentions, and exploratory factor analysis was conducted to analyze the validity. In addition, a correlation analysis was conducted to identify relationships with variables, finally, a hierarchical regression analysis was performed to identify the effect of moderating social networks in entrepreneurship and personal characteristics. The study found that, firstly, Entrepreneurship was positively correlated with extroversion, achievement desire, self-efficacy, social network, entrepreneurial intention, and negatively correlated with introversion. Second, The extroversion of personal characteristics showed positive correlations with achievement desire, self-efficacy, social network, and entrepreneurial intention and negatively correlated with introversion. Introversion has a negative correlation with achievement desire, self-efficacy, social network, and entrepreneurial intention, and self-efficacy has a positive correlation with social network and entrepreneurship. Third, social networks have been shown to moderate the relationship between personal characteristics and entrepreneurial intention. Reflecting the results from this study, we expect that those preparing for future start-ups will be a meaningful reference to validate their capabilities and start them.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.2C
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• pp.153-157
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• 2009

In this paper, for even integer N, we propose a new construction method of quaternary low correlation zone(LCZ) sequence set from a binary LCZ sequence set with parameters (N,M,L,$\varepsilon$). Proposed method applies the inverse gray mapping from Krone and Sarwate to binary LCZ sequences and their phase shifts. The only needed condition of binary LCZ sequence set used in this construction is even period.

• The Journal of the Korea Contents Association
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• v.16 no.11
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• pp.199-210
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• 2016

This study was conducted to examine the mediation effect of narcissistic personality traits and schizophrenic personality traits on the relationship between smartphone addiction and relational aggression of middle school girls. Data from 378 girls in Kyungki and Chungchoeng areas were analyzed. Main results were as follows. First, smartphone addiction showed significant positive correlations with narcissistic personality traits, schizophrenic personality traits and relational aggression. Both personality traits also showed positive relationship with relational aggression. Second, narcissistic personality traits fully mediated the relationship between smartphone addiction and reactive relational aggression. Third, schizophrenic personality traits partially mediated the relationship between smartphone addiction and relational aggression. Finally, clinical implications for adolescent girls at high risk of smartphone addiction and suggestions for future studies were discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.7
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• pp.4566-4575
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• 2015

This study aimed to develop a model to explain the factors influencing father's parenting stress, and to verify the appropriateness of the model. The participants included 1609 fathers with a 5-year old. The study used 2012 Panel Study of Korean Children (PSKC) by the Korea Institute of Child Care and Education (KICCE), and analyzed with SPSS and AMOS programs. The analysis showed that first, father's income and parental efficacy were negatively related with parenting stress and father's depression and marital conflict were positively related with parenting stress. Second, father's parenting stress was directly and indirectly impacted by parental efficacy and their child's temperament. These results suggest that father education are needed for promoting positive paternal mental health and parental efficacy, to reduce parenting stress of fathers.