• Convergence Security Journal
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• v.3 no.2
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• pp.1-10
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• 2003

In the distributed-computing environment, applications or users have to share resources and communicate with each other in order to perform their jobs more efficiently. In this case, it is important to keep resources and information integrity from the unexpected use by the unauthorized user. Therefore, there is a steady increase in need for a reasonable way to authentication and access control of distributed-shared resources. In RBAC, there are role hierarchies in which a higher case role can perform permissions of a lower case role. No vise versa. Actually, however, it is necessary for a lower case role to perform a higher case role's permission, which is not allowed to a lower case role basically. In this paper, we will propose a permission delegation method, which is a permission delegation server, and a permission delegation protocols with the secret key system. As the result of a permission delegation, junior roles can perform senior role's permissions or senior role itself on the exceptional condition in a dedicated interval.

• Journal of the Korea Convergence Society
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• v.9 no.7
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• pp.69-75
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• 2018

The key technology of Industry 4.0, Smart factory is evaluated as the driving force of our economic development hereafter and a lot of researches have been established. Various entities including devices, products and managers exist in smart factory, but roles of these entities may be continuous or variable and can become extinct not long after. Existing methods for access control are not suitable to adapt to the variable environment. If we don't consider certain security level, important industrial data can be the targets of attacks. We need a new access control method satisfying desired level of efficiency and security without excessive system loads. In this paper, we propose a new RBAC-PAC which extend AC defined for PKC to the authority attribute of roles. We distribute PACs for roles through block chain method to provide the efficient access control. We verified that RBAC-PAC is more efficient in the smart factory with large number of entities which need a frequent permission update.

• Journal of the Korea Convergence Society
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• v.13 no.4
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• pp.195-201
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• 2022

The core of the Fourth Industrial revolution, the topic of the 21st century, lies in the convergence of various technologies that are developing to the cutting edge. Therefore, convergence education is essential to solve problems from various perspectives. Above all, in order to solve the complex problem arising from the contact point between humans and technology in the future society, it was considered that insight through a humanities and artistic approach was necessary. Now, universities are trying to run a multidisciplinary comprehensive design to adapt to the new digital environment. In this study, an operation case of an engineering comprehensive design subject incorporating art operated by a researcher was described. The researcher presented an art convergence curriculum in a comprehensive design subject by applying 1. problem recognition and definition, 2. idea derivation and evaluation, 3. project development, 4. presentation, and demonstration process operation methods. Through this study, it is meaningful that it presented a method of operating art convergence in engineering comprehensive design subjects by allowing students to attempt an artistic aesthetic and emotional approach to project development.

• Journal of the Korea Convergence Society
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• v.12 no.3
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• pp.297-304
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• 2021

This study aims not only to access the visual thought-oriented approach that has been implemented in established art therapy and education but also to integrate language education and therapeutic approach to support the development of school-age children. Thus, text mining technique was applied to search for areas where different areas of language and art can be integrated. This research was conducted in accordance with the procedure of basic research, preliminary DB construction, text screening, DB pre-processing and confirmation, stop-words removing, text mining analysis and the deduction about the convergent areas. These results demonstrated that this study draws convergence areas related to regional, communication, and learning functions, areas related to problem solving and sensory organs, areas related to art and intelligence, areas related to information and communication, areas related to home and disability, topics, conceptualization, peer-related areas, integration, reorganization, attitudes. In conclusion, this study is meaningful in that it established a framework for designing an activity-centered convergence program of art and language in the future and attempted a holistic approach to support child development.

• Journal of the KSME
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• v.53 no.3
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• pp.56-60
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• 2013

산업 환경이나 디자인 산업의 변화에 영향받아 최근의 설계 교육 프로그램 및 커리큘럼은 다학제적 접근을 통한 융 복합적 방향으로 모색되고 있다. 이 글에서는 국외 및 국내 대학에서의 융합설계교육 진행사항에 대하여 뮨헨공과대학(TUM: Technische Universit$\ddot{a}$t M$\ddot{u}$nchen)과 홍익대학교의 사례를 소개하고자 한다.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2007.05a
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• pp.387-402
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• 2007

전체적으로 우리나라의 IT-BT-NT 융합기술에 대해 융합기술 개발이 미래의 성장동력 창출에 매우 중요함에도 불구하고 융합기술 개발면에서 IT - BT 는 선진국에 비해 $65{\sim}80%$, NT-BT는 $65{\sim}65%$, IT-NT는 $50{\sim}80%$로 열세를 보이고 있다. 그러므로 융합기술개발에 기반한 신산업 육성을 위해서는 먼저 정부측에서 연구개발 예산의 확대와 자금지원, 종합적인 융합기술개발전략의 수립, 관련부처간 역할분담과 조정, 법 제도 정비 및 역기능 방지대책의 마련이 필요하다.

• Journal of the Korea Convergence Society
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• v.9 no.4
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• pp.57-63
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• 2018

IoT devices are used in many areas to perform various roles and functions in a cloud environment. However, a method of access control that can stably control the IoT device has not been proposed yet. In this paper, we propose a hierarchical multi-level property access control scheme that can perform stable access of IoT devices used in a cluster environment. In order to facilitate the access of the IoT device, the proposed method not only provides the ID key (security token) unique to the IoT device by providing the IoT Hub, but also allows the IoT Hub to authenticate the X.509 certificate and the private key, So that the private key of the IoT device can not be seen outside the IoT device. As a result of the performance evaluation, the proposed method improved the authentication accuracy by 10.5% on average and the processing time by 14.3%. The overhead of IoT Hub according to the number of IoT attributes was 9.1% lower than the conventional method.

• The Mathematical Education
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• v.52 no.2
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• pp.247-270
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• 2013

The purpose of this research was to analyze the convergent approaches for creativity in elementary mathematics textbooks in Korean and the united States. Convergent approaches have emphasized since NCTM(2000) consistently includes 'connections' as an important factor in mathematics curriculum and KOFAC(Korea Foundation for the Advancement of Science & Creativity) initiated the STEAM(Science, Technology, Engineering, Arts, and Mathematics) in mathematics and science education. For this research, two elementary mathematics textbooks were analyzed focused on their contexts and contents: Korean National Elementary Mathematics Textbooks and Navigations in Numbers, Data, and Space. In both textbooks, it was not easy to find so called the convergent approach in a real sense, but they use some contexts for connections between mathematical concepts and real world phenomena. For the enhancement of convergent approaches in mathematics education, we need to have a broader sense in the convergent approaches and develop various meaningful materials.

• Proceedings of the Korean System Dynamics Society
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• 2007.11a
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• pp.1-8
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• 2007

최근에, 에너지 부문의 지속가능성을 달성하는 하나의 패러다임으로 전체론적 접근법(holistic approach)이 국내외적으로 관심의 대상이 되고 있다. 에너지 부문에서, 특히 원자력 시설과 같이 복잡 시스템은 전체론적 접근법 대신에 주로 결정론적 방법이나 확률론적 방법과 같은 기존의 분석적 접근법으로 다뤄지고 있다. 하지만, 시스템 다이내믹스와 같은 전체론적 접근법으로 문제들을 다루는 경우, 기존 접근법으로 얻을 수 없는 다양한 정보를 얻을 수 있다. 이 작업의 목적은 한국원자력 부문에 시스템 다이내믹스가 어떻게 적용되고 있는 지 그 현황을 소개하고, 앞으로 이러한 방법론이 활용될 수 있는 가능성을 논의하고자 한다. 이를 통해, 시스템 다이내믹스 방법론과 분석적 방법론의 융합에 기반한 정보와 기술력의 시너지 효과를 기대해 본다.

• Information and Communications Magazine
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• v.28 no.4
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• pp.3-10
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• 2011

본고에서는 산업-IT융합포럼의 국방 분과 운영 경험을 토대로 국방에 IT를 융합하여 발전시키기 위한 현안을 살펴보고 활성화를 위한 전략적 방안을 제안하고자 한다. 이를 위해 정보화 관점에서 국방 내 외부 요인을 검토하여 1) 빠르게 변화하는 정보기술에 대한 군사적 적용가능성을 시험 검증하여 신속하게 도입할수 있는 방법 2) 검증된 상용기술 제품에 대하여 중장기 기획관리 절차를 생략하고 빠르게 전력화할 수 있는 제도적 방안 3) 무기체계 개발에 있어 국산 소프트웨어의 채택 4) 현 방산업체가 제작하는 무기체계에 필요한 소프트웨어 개발과 관련하여 일반기업에게도 참여할 수 있는 기회를 제공하는 방안을 중점적으로 살펴본다. 특히, 기존 정보화보다는 큰 틀에서 국방과 IT의 융합을 활성화하기 위하여 국가의 산업-IT융합 정책과 보조를 맞추되 국방 내부의 변화에 초점을 두고 IT 시범사업의 활성화, 상용 제품 및 기술의 검증을 위한 실험부대의 설치 및 운용 등의 다양한 개선대안을 제시한다.