• Journal of Science Education
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• v.38 no.1
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• pp.29-40
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• 2014

The new paradigm of the 21st Century science education explores a wide range of possibilities that can foster students' interest toward science and creative convergence thinking. The purpose of this study was to utilize science visual media that can improve students' scientific creativity and artistic sensibility. Curriculum reorganization can be one solution for the primary convergence science teaching and learning strategies using science visual media. Through a new and exciting experiment to a various science visual media such as science picture, TV film, movie, UCC, etc., we hope this teaching and learning strategy can increase the students' scientific interest and attitude.

• Journal of Korean Library and Information Science Society
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• v.38 no.4
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• pp.87-116
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• 2007

The School Library Instruction(SLI) is one of the tool subjects for information literacy. Therefore, the connection with school curricula Is the activation strategy of SLI. The school library Integrated curriculum is Integrating a thinking strategy of SLI and subjects of subject education curricula. The purpose of the school library Integrated curriculum is to strengthen the educational role of teacher-librarian and self-directed learning. In this study, a presented example of the school library Integrated curriculum for the 10th students is based on the cross-curriculum subjects as a strategy of connection and integration.

• Convergence Security Journal
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• v.8 no.1
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• pp.9-18
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• 2008

This paper propose CAR-TO-CAR protocol which can prevent the cars at high-speed from a multiple clash accident at highway with exchanging information. we construct cluster be linked with distance took from GPS(Global Positioning System) because there is no connection at cars on the road. The proposed method solved the overload problem by establishing route because construct the cluster at the IEEE 802.11 MAC class. 'Multi-hop Routing protocol' based on Active Network enable stable Network to be formed by using Active Network.

• New & Renewable Energy
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• v.9 no.2
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• pp.51-57
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• 2013

The Grid code is being strengthen as increase of renewable energy ratio. Especially, the grid connection regulations are continuously being updated for stable operation of power grids. Static grid support and Dynamic grid support must make an accurate measure at Grid connected point because they needs control algorithm individually. It has to exactly measure voltage including switching ripple at the output of the inverter generating system. In addition, it is necessary to have an accurate voltage measurement when the situation rapidly changing the grid impedance is caused by the input of serial impedance of transformer and line impedance as well as Grid Fault Device. In this paper, We propose a new detection method of grid voltage to calculate accurately the r.m.s voltage of the grid connection point along the standard required by the low voltage regulation. We verified performance through simulation grid fault device.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.917-918
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• 2013

Navigation or Portal sites is providing real-time information of roads according to heavy rain in guide services for finding a path recently. Especially "e-traffic alerts" is providing traffic information according to the presence of road flooding and accidents. This research is goal to provide drivers to real-time status information of roads which have the connected its information to support the real-time rainfall information of meteorological office and portal sites. We suggest the evaluation method of risk roads combined the real-time rainfall information and portal information.

• Journal of Korean Society of Water and Wastewater
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• v.27 no.6
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• pp.679-687
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• 2013

Although stable and safe drinking water supply to the customers is a basic function of multi-regional water supply systems in Korea, most systems have their vulnerabilities in emergency time due to the branch-type. Application of connections from the other water supply system can provide a solutions for these tentative problems. This paper describes reduction planning of water supply accidents that can minimize a service interruption to customers in multi-regional water supply system by connecting pipe lines between local water supply systems in Mokpo city areas. The result of this study shows that Juam dam multi-regional water supply systems can cover all of the water shortage in southern parts of Jeonnam multi-regional water supply systems by transmitting water through connected pipes between local networks. This can be effective to supply water interactively in various contingencies, when a pipe line accident occurs in southern area of Jeonnam multi-regional water supply systems. On the contrary, southern area of Jeonnam multi-regional water supply systems can cover 99.5 %($62,500m^3/day$) of the water shortage of Juam dam multi-regional water supply systems when service interruptions caused by various pipe accidents occur in the system.

• Journal of Information Technology and Architecture
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• v.10 no.4
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• pp.451-466
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• 2013

기업들은 정보기술 리스크(IT Risk)에 대하여 어떻게 대처하고 있을까? 금융기관이나 공공기관은 태생적으로 이미 위험관리를 적극적으로 수행하고 있다. 정보기술에 대한 위험관리도 지난 10년동안 전산망 마비, 해킹 사고, 디도스 공격, 고객정보 유출 등을 겪으면서 적극적으로 대응해 왔다. 특히 2011년 농협사태는 IT 성과보다는 IT 보안을 훨씬 중요하게 보는 계기가 되었다. IT 보안 인력과 예산이 대폭 강화되고 망분리 사업이 추진되는 것이 대표적인 사례이다. 하지만 그동안 IT 위험관리는 특정 기술에 대한 사전 대응 및 사후 대응 강화에 집중되었다. 현재 IT 위험관리는 단편적 관리에서 종합적 관리로 전환되고 있다. 최근에 많은 기업들이 전사 차원의 정보기술 리스크 거버넌스(IT Risk Governance) 체계를 구축하고 있거나 구축하는 계획을 갖고 있다. 하지만 아직도 IT보안은 전사적으로 통합되지 못하였으며, IT 위험관리 프로세스는 조직에 내재화 되지 못 하였고, IT 성과관리와 연계성은 고려하지 못하고 있다. 본 논문에서는 IT 관리와 기술을 효과적으로 연계하기 위하여, 그리고 IT 성과와 IT 위험을 균형되게 관리하기 위하여 엔터프라이즈아키텍처(EA: Enterprise Architecture) 활용을 제안하고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.5
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• pp.17-26
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• 2018

If a photovoltaic (PV) system is installed in a primary feeder interconnected with the PV system, bi-directional power flow can occur, and then, the magnitude and direction of the fault current can change, depending on the fault location and point of common coupling (PCC) of the PV system, and the time current curve (TCC) cannot be properly coordinated between protection devices. Also, it is difficult to obtain a proper time interval for protection devices because the conventional setting approach is applied, even though the PV system is installed and operating. Therefore, this paper presents three operation modes considering the operational conditions of the PV system to obtain setting values for protection devices. Based on the mode, this paper proposes an algorithm to calculate the optimal protection coordination time interval according to the introduction capacity of the PV system. In addition, this paper performs modelling of a distribution system with the PV system and protection devices by using Off-DAS S/W, and analyzes the characteristics of the time interval between the protection devices, such as substation relays, reclosers, customer relays, and PV customer relays. The simulation results confirmed that the proposed operational modes and setting-value algorithms are useful and effective for protection coordination in a distribution system for a PV system.

• Korean Educational Research Journal
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• v.43 no.1
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• pp.59-87
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• 2022

'Thinking and Expression' develops comprehensive problem-solving ability to solve various problems in life and society by cultivating thinking skills such as creative, logical, reflective thinking, and connected thinking and communication ability to communicate one's thoughts through writing and speaking. This is a college basic liberal arts course established to improve students. The purpose of this study is to introduce the case of rewriting of literature reading and healing performed as an extension of storytelling learning in 'Thinking and Expression' class. In class, we read Michel Tournier's short story "Let Joy Remain in Me" and shared our feelings about the final scene of the work. Then, we each presented a question that came to mind as we read the work, and we shared our thoughts with the members of the group. Next, the students created the content that will follow the last scene of the work with the direction of healing. Through this, we tried to read the work carefully and deeply appreciate its contents, and we had time to feel the creative experience of the reader re-creating the meaning of the work and the effect of healing rewriting. Then, we turned the direction of reflection to the realm of the reader's own life and expressed their desired future self in writing, imagining that it had already been realized. Through this, we tried to discover the meaning of practical rewriting towards self-actualization.

• Journal of the Korean School Mathematics Society
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• v.8 no.1
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• pp.77-87
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• 2005

Smith(2001) calls for practice-based professional development for teachers of mathematics. This paper discusses laboratory class as a model for conducting professional development program for a group f elementary school mathematics teachers. The laboratory class seeks to promote teachers' generative growth (Carpenter & Levi, 1999) and all the core and structural features (Garet, Porter, Desimone, Birman & Kwang, 2001) of a professional development are also engaged in this program and the ultimate goal is for teachers to be reflective in their practices to be generative (Carpenter & Leher, 1999) in their teaching and learning. This paper also discusses the design of the laboratory class based on the principles of reflective thinking and psychological observation by Dewey to connect theory with practice.