• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.713-714
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• 2009

유비쿼터스 컴퓨팅은 사람을 포함한 현실 공간에 존재하는 모든 대상물들을 기능적, 공간적으로 연결하여 사용자에게 필요한 정보나 서비스를 즉시에 제공하는 기반 기술이다. 이 논문에서는 사용자의 상황정보를 고려하기 위한 시공간 온톨로지를 구축하고, 사용자에게 최적의 서비스를 제공하기 위하여 자동으로 서비스 패턴을 추출하는 트리거 규칙 기반의 마이닝 시스템을 제안한다.

• The Korean Journal of Elementary Counseling
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• v.11 no.2
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• pp.219-235
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• 2012

The purpose of this study was to identify the factors of school happiness of elementary students by implicit theory. For this purpose, 192 items for happiness were constructed based on 76 5th and 6th elementary students' free descriptions. Then 75 items were selected for preliminary factor analysis based on item appropriateness by evaluation of 28 elementary teachers. The happiness inventory composed 136 items was administered to 155 students and 36 items were selected based on exploratory factor analysis results. 4 factors-optimism, positive peer-relationship, self-esteem, consideration, and teacher-relationship-were extracted by principal component analysis. The confirmatory factor analysis indices indicated that 4 factor model of happiness was fit. The reliability(Cronbach's ${\alpha}$) was .996.

• Journal of The Korean Association of Information Education
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• v.13 no.4
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• pp.433-441
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• 2009

In this research, we are looking for new ways to parents' participation in the school education through the educational information. The qualitative research about this research is not at all state. We use the method of study based on the grounded theory. The case analysis object is a outstanding school of the educational information in 2007, ten excellent schools of the cyber home service, two research schools 2 and two schools of research for NEIS. The parents make the learning check on situation of the students and communicate with school through the cyber home learning service and NIES. Also, It is bringing parents around the school closer through the SMS service and is communication path out of time and space. We make the things that make communications work through it. We know it is building trust with the parent and school.

• The Journal of Sustainable Design and Educational Environment Research
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• v.22 no.4
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• pp.1-8
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• 2023

The downsizing of schools is accelerating due to a rapid decline in the school-age population, and as the crisis over regional and school disappearance increases, the need for smaller schools to respond to future educational needs is increasing. Through flexible curricula and digital/artificial intelligence-based classroom teaching improvements, students' satisfaction with school life, student creativity and character development, improved academic achievement, and strengthened cooperative communication capabilities will be observed, and teachers' teaching and learning methods will change. Educational effects such as these are important, and transforming school facilities into future-oriented spaces, including school space innovation, is required to accomplish them. This study examined the future of education systems in small schools, focusing on analyzing the educational effects and awareness of the sustainability of spatial innovation, in terms of school space changes, school education correlation, and smart environment, to develop innovation projects in small schools. A desirable direction for implementation is presented.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.481-484
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• 2006

학교생활에서 학사업무의 생산성은 물론 구성원들의 편리하고 효율적인 학습활동 지원을 통하여 학습자의 교육 생산성을 높이기 위한 유비쿼터스 컴퓨팅 기술을 이용한 U-캠퍼스 구축이 요구된다. 따라서 본 논문에서는 U-캠퍼스 환경에서 여러 가지 상황 정보를 고려한 동적 접근 제어 메커니즘을 제안한다. 본 논문에서 제시한 동적 접근 제어 메커니즘은 기존의 역할 기반의 접근 제어(RBAC) 모델을 확장하여 사용자에게 부여된 역할 활성화 상태에 따라 접근 권한을 부여하는 방법으로, 상태검사 에이전트(agent)와 상황인식 에이전트, 상황인식 매트릭스(CAM)에 의한 위치와 시간 및 시스템 자원과 같은 여러 가지 동적인 상황 정보를 고려하여 효율적으로 권한을 부여 할 수 있다.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.594-596
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• 2009

본 연구에서는 영상센서를 이용한 상황인식 기반의 컴퓨팅 기술이 혼합된, 스쿨존 안전 관리 시스템을 제안한다. 영상센서를 통한 객체 추출과 상황 인식 기술의 조합을 통하여, 초등학교 주위에서 발생할 수 있는 여러 상황 중 초등학생의 유괴나 사고 등을 인식할 경우 모니터링 장치로 전송하여 응급 상황을 관리할 수 있다. 또한 제안된 시스템은 인간의 시각을 필요로 하는 철도 건널목이나, 교통량 통계조사, 공장 자동화 시스템 등 다양한 응용분야에 활용할 수 있는 최적의 선택이라 할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.723-726
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• 2013

최근 IT기술의 발전으로 인해 클라우드 컴퓨팅 기술이 도래됨과 동시에 다양한 분야에서 클라우드 컴퓨팅 기술을 융합하기 위한 연구가 진행되고 있다. 그 일환으로 데이터센터에도 클라우드 컴퓨팅 기술을 접목시켜 사용되고 있는 추세이다. 클라우드 데이터센터는 다양한 사용자들이 각기 다른 디바이스를 기반으로 데이터센터에 접근하여 저장된 데이터를 사용하여 업무를 수행하게 되며, 다양한 환경에서 사용자들이 동시다발적으로 저장된 데이터에 접근하게 된다. 클라우드 데이터센터는 시 공간에 관계없이 접근 가능하기 때문에 사용자의 상황이 자주 변경되며, 이에 따라 무분별한 데이터의 접근으로 인해 다양한 보안 위협이 발생할 수 있다. 본 논문에서는 이러한 보안 위협을 예방하기 위해 사용자의 상황을 인지하고, 그 상황에 따라 접근 여부를 결정하는 상황 인식 기반의 접근제어 모델을 제안한다.

• Convergence Security Journal
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• v.13 no.5
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• pp.177-186
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• 2013

It has been long time since the social concern about school safety was fully raised in our country. The accidents, such as sexual violence against young children, traffic accident when going to and from school, psychological violence by bullying, extorting money & violence and so on, frequently happen. Under the circumstances that this kind of school safety problems are concerned greatly by society, it is very important for schools to create the environment in which children can have a safe living. The study focuses on the necessity and introduction of a professional school police system to establish the sexual violence prevention system in advance. The system, practically and systematically organized, can prevent various kinds of safety accidents and form the agreement of family, regional society, and related institutions alike. It is also supposed to emphasize the strengthening of school safety by its operation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.119-121
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• 2022

In this paper, we will make a model that finds optimal phase for each crossroad. When the traffic volume, traffic capacity, and the lane width of every direction is given for each crossroad, we aim to find the most efficient phase. We established an evaluation function that evaluates the efficiency of each phase using the values of the average waiting time in one direction, the average delay time, the standard deviation of the delay time, and the average delay time in each direction. The time allocation to optimize a phase pattern can be obtained by using the gradient decent method. Through this research, we hope to decrease the waiting time in transporation, thus improving the overall traffic condition in cities.

• Journal of the Korean Chemical Society
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• v.63 no.5
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• pp.376-386
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• 2019

The purpose of this study was to explore the learning progression of logical thinking in acid and base chemical reactions and to evaluate its validity. For this purpose, we collected 387 participants in 9 schools of elementary, middle and high schools nationwide. The questionnaire developed in this study was composed of nine items. The questionnaire presented the acid and base reactants and products, and the students pictured their thoughts on how these substances change, and answered the reasons of their thoughts. Situation contexts of the questionnaire were divided into two groups: one kind of solute dissolved in a solvent, and two kinds of solute dissolved in a solvent. In this study, six levels of learning progression were assumed by combining material conservation logic, combination logic, proportion logic, and particle number conservation logic. By analyzing the data, Infit and Outfit values of Person reliability, Item reliability, MNSQ and ZSTD were obtained from the Rasch model. As a result of the analysis of data, it was found that lower levels of learning progression prevailed up to the younger grade students till $8^{th}$ grade. The higher levels of learning progression(Level 2~Level 5) prevailed up to the older grade students. However, higher levels of learning progression dropped sharply in Grade 12. The 5 level of learning progression was very low in all grades, and $9^{th}$ grade had highest percentage of students belonging to the 5 level. Interpretation of these unusual results suggests a future research related to explanation differences of textbooks.