• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.4
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• pp.541-547
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• 2022

Realistic education using virtual reality compared to traditional learning can enhance students' understanding of knowledge through immersion and interaction. In previous studies, VR education is mainly focused on experiences, and it is difficult to find its applications for environmental education. Environmental issues are a global problem, and environmental education is essential for the future. In this research, we developed an immersive virtual reality-based environmental education simulation designed to help students recognize the importance of environmental education and participate in environmental-friendly actions. This simulation is based on the virtual ecosystem model, which maintains a casual relationship among environmental factors, spatio-temporal connection, and persistent state. Users intuitively recognize environmental problems and is motivated to solve the problem while experiencing the results of interaction related to environmental factors in virtual environment.

• Journal of KIISE:Computer Systems and Theory
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• v.30 no.11
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• pp.675-690
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• 2003

In this paper, we present the virtual dancing studio for distributed virtual environment. In this system, geographically distributed user shares the virtual dancing hall and interacts with each other. The participating object can be a graphical avatar or a live video stream. It allows the coexistence of graphic objects and real images in the shared virtual space. One of the main technical challenges in developing the distributed virtual environment is to handle excessive network traffic. In an effort to effectively reduce the network traffic, we propose a scheme to adjust the QoS of each object with respect to the distance from the observer in the virtual space. The server maintains the QoS vector for each client's shared space and controls the packet traffic to individual clients based on its QoS vectors. We develop a proto-type virtual dancing environment. Java based development enables the client to be platform independent. The result of experiment shows that the adoption of hierarchical QoS management significantly reduces the overall network traffic.

• Journal of the Korean earth science society
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• v.32 no.3
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• pp.334-345
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• 2011

The purpose of this study was to find out inservice teachers' teaching skills and relevant educational settings that could be applied to an instruction of problem-based learning (PBL). Participants have been instructed PBL teacher training programs and applied PBL into teaching and learning process. Three elementary teachers were selected to participate in the study, and data were collected with semi-structured interviews. The interviews of the teachers in relation to PBL were analyzed by two main topics: (1) the teachers' teaching skills required in PBL and (2) the educational settings in implementing PBL. The results are as follows: First, there is a difficulty involved in the implementation of PBL in that its preparation and teaching process are different from the traditional teaching methodology. However, as a helper who guides the students to self-directed learning in the free and permissible learning environment in which students are motivated to develop their potential effectively, the teachers are to invest their time consistently and to put their efforts into making an effective class in the entire process of PBL. Second, as a method to apply the problem-based learning to the education settings, the teachers must spread the awareness of PBL to fellow teachers, students, their parents and the administrators in education and form the community of the teachers. Most importantly, when the teachers apply PBL in the directly, from the joy of witnessing the changes in the students, they will choose to adopt PBL.

• Bulletin of Korea Environmental Preservation Association
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• s.401
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• pp.36-39
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• 2012

'Green경영'은 기업활동 전반의 환경영향을 최소화하고 Green 제품 확대, Green 신사업 강회를 통해 새로운 고객가치를 창출하는 동시에 국가 및 사회에 기여하는 적극적이고 능동적인 경영이다. 과거 환경경영이 환경관리를 주요 방침으로 삼고, 환경에 대한 영향을 최소화하기 위해 사업장의 환경관리를 중심으로 전개되었다면, Green 경영은 Green 사업장 조성뿐만 아니라 Green 제품 확대, Green 신사업 강화를 통해 전세계적 이슈인 기후변화 문제에 대응하고, 저탄소 녹색성장에 기여하여 지속성장을 도모하는 것이 주목적이다. LG화학은 Green 경영을 통해 제조 공정상의 에너지 효율을 개선하고 온실가스 감축, 물(원수) 사용량 절감, 그린에너지 생산 등과 같은 직접적인 기여뿐만 아니라 에너지 효율이 높은 제품을 판매, 소비단계에서의 온실가스 배출을 줄이고 태양전지, LED, 전기차 배터리 등 Green 신사업를 확대하는 등의 간접적 기여를 통해 지구 전체의 온실가스 감축에 기여하고자 한다. 한편 기후변화 관련 국내외 규제에 능동적으로 대응하고, 국내외 에너지 정세 변화에 따른 영향을 최소화하기 위하여 온실가스 배출량 관리, 신재생에너지 시스템 설치, 스마트그리드 시범사업 참여 등 다양한 활동을 전개하고 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.531-535
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• 2007

유비쿼터스 지능 공간(Ubiquitous Smart Space)에서 동적으로 발생하는 다양한 문제를 협업을 통하여 해결할 수 있는 방법론으로 제안된 커뮤니티 컴퓨팅(Community Computing) 모델을 기반으로 하는 개발도구(Community Computing Developing Tool Kit : CDTK)를 사용하면 특정 문제를 해결할 수 있는 커뮤니티 컴퓨팅 어플리케이션이 생성된다. 이 커뮤니티 컴퓨팅 어플리케이션이 실제로 유비쿼터스 지능 공간에 존재하는 uT-entity에 이식되어 동작하기 위해서 uT-entity의 종류에 상관없이 커뮤니티 컴퓨팅 어플리케이션이 배포될 수 있는 환경을 필요로 한다. 본 연구에서는 CDTK를 이용하여 생성된 커뮤니티 컴퓨팅어플리케이션이 uT-entity에 배포되어 각 uT-entity가 커뮤니티의 멤버로 참여하여 멤버간의 협업을 통해 목적을 달성할 수 있도록 지원하는 어플리케이션 프레임워크인 멤버 프레임워크(Member Framework)를 제안한다.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.796-801
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• 2007

유비쿼터스 지능 공간(Ubiquitous Smart Space)에서 동적으로 발생하는 다양한 문제를 협업을 통하여 해결할 수 있는 방법론으로 제안된 커뮤니티 컴퓨팅 (Community Computing) 모델을 기반으로 하는 개발 도구(Community Computing Development Tool Kit : CDTK)를 사용하면 특정 문제를 해결할 수 있는 커뮤니티 컴퓨팅 어플리케이션이 생성된다. 이 커뮤니티 컴퓨팅 어플리케이션이 실제로 유비쿼터스 지능 공간에 존재하는 uT-entity에 이식되어 동작하기 위해서 uT-entity의 종류에 상관없이 커뮤니티 컴퓨팅 어플리케이션이 배포될 수 있는 환경을 필요로 한다. 본 연구에서는 CDTK를 이용하여 생성된 커뮤니티 컴퓨팅 어플리케이션이 uT-entity에 배포(Deployment)되어 각 uT-entity가 커뮤니티의 멤버로 참여하여 멤버간의 협업을 통해 목적(Goal)을 달성할 수 있도록 지원하는 어플리케이션 프레임워크인 멤버 프레임워크(Member Framework)를 제안하고, 이를 이클립스 리치클라이언트 플랫폼(Rich Client Platform) 기반의 플러그인(Plug-In)으로 설계하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.05a
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• pp.260-263
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• 2022

현재의 교통정보시스템은 수집된 정보를 서버에서 가공하여 서비스하는 형태로 이루어져 있다. 이러한 형태는 네트워크 구성이 비교적 단순하고 유지관리 비용이 적게 든다는 장점이 있지만, 반면에 실시간성이 저하되고 보안이 제대로 보장되지 않을 수 있다는 문제가 있으며, 최근 많은 연구가 이루어지고 있는 VANET 환경에서의 교통정보시스템도 broadcast storm의 가능성을 안고 있다. 본 연구에서 제안하는 교통정보시스템은 자동차가 수집한 돌발 상황에 대한 데이터를 RSU(Road Side Unit)가 수신하고, 이후 메시지를 노드들에게 보낼 때 블록체인에 업로드함으로써 보안성과 broadcast storm 문제들을 해결할 수 있으며, raw data 를 IPFS 에 저장하여 시스템 고도화에 사용할 수 있어 참여자들이 교통 상황에 대해 신속하게 대응할 수 있도록 하는 장점을 갖는다.

• The Journal of the Korea Contents Association
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• v.18 no.3
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• pp.19-33
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• 2018

Collaborative consumption was suggested as a new paradigm of consumption and business model that focuses on sharing and using resources to reduce the risks of resource depletion and environmental impact. Individual consumers carry out a role not only as users but also as providers for collaborative consumption. In the present study, the authors investigated consumers' intention to participate in collaborative consumption both as providers and users. The effects of perceived benefit of collaborative consumption, subjective norms and ease of participation on the intention to participate in collaborative consumption were analyzed. The perceptions on benefits and subjective norms were relatively high, while the perception on ease of participation was relatively low. The effects of subjective norms and ease of participation on the intention to participate in collaborative consumption were significant. The result shows that support from one's reference group and the perception on ease of participation have significant positive effects on the intent to participate in collaborative consumption. Therefore, communication strategies for developing a positive consumer attitude and a social consensus about the necessity of collaborative consumption are needed.

• School Mathematics
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• v.8 no.3
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• pp.265-290
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• 2006

The purpose of this study is to search an effective teaching & learning program by examining how much does Excel affect on problem solving of linear function. This study was based on qualitative case study. Teaching experiment was performed for seven periods with five students in 8th graders. Pre and posts tests were attempted to analyze the changes of student's ability on problem solving of linear function. The analysis of tests were performed in category with correct process-object perspective, near process-object perspective, incorrect process-object perspective. According to this study, the subjects showed an improvement on problem solving perspective of linear function. This meant that lessons using Excel had influenced on the problem solving of linear function. We noticed that exploring the learning environment with Excel could supplement paper-and-pencil environment. We believed that Excel with an intuitive dynamic and explorative skills can play a role in scaffolding to support problem solving of linear function.

• Korean Journal of Construction Engineering and Management
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• v.13 no.3
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• pp.3-13
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• 2012

Urban area has caused decline of commercial function and infrastructure because of unorganized urban development, and urban regeneration projects have appeared since 2000s in order to solve urban problems. Because urban regeneration projects have a complexation of various use, the complicated business process and unsystematic conduction work, project stakeholders are suffering from problem in conducting project. Therefore, this study suggested the necessity of business system for urban regeneration projects with analyzing situations and stakeholders. Also, this study classified business information through development of BPS in order to make information system of business process in the urban regeneration project and evaluated it after realization for information system based on BPS of urban regeneration projects. Project stakeholders will be systematically provided information about urban regeneration projects through this system and it is expected to accomplish urban regeneration projects effectively.