• 정보학연구
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• 제4권3호
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• pp.139-154
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• 2001

현재의 역할기반 시스템에서는 보안관리자가 역할에 사용자를 지정한다. 이는 분산 환경에서 보안관리자의 계속적인 참여로 인해 관리의 어려움을 증가시키고 있다. 역할기반 위임 기술은 각 사용자의 위임을 갖는 분산 환경 하에서 RBAC을 적용하게 하는 수단을 제공한다. 역할기반 위임의 기본 개념은 사용자가 자신의 역할의 권한을 다른 사용자에게 부여하여 그로 하여금 자신의 일을 수행하게 하는 것이다. 본 논문은 사용자가 새로운 위임 역할을 생성하여 자신의 역할 권한을 위임하는 사용자 수준의 역할기반 위임 모델에 대한 rule-based framework을 제시한다. 또한 보안 정책을 규정하고 적용하기 위한 rule-based 언어를 소개한다.

• 한국실내디자인학회논문집
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• 제6호
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• pp.63-66
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• 1995

Our natural desire to exuviate old theory and search for new ideas means conversion and reformation. Howev-er, the new idea of the present moment will soon become an ancient history when the next generation emerges with more advanced ideas. Naturally, we have learned to accept the past history and utilized it as a the foundation for the future. Through the repeated process of the learning method, the popula-tion cultivate themselves with proper understanding and appropriate attitude toward design. By analyzing social behaviors of the past and living conditions, we can ex-pand our imaginations beyond limits. Each society and its local condition have tremendous effects on the develop-ment and progress of artistic theories, techniques and craftsmanship, and potential design of every day use products. Today, interior design can not afford to ignore the or-ganic relationship of life style and space. Thus, the plan-ning of space means the planning of life style. Life style, as it is, has a vast definition and changes with time. That is why spaces, which consider the life style and its environment when designed, show different aspects ac-cording to its corresponding time. Interior design, in particular, differs by time and re-gion to create its unique style. The change in space is the natural result of the change in life style which again is sensitive to the change in cultural and environmental elements. Design is no longer designing of mere physical elements and environment. Design should be taken as the equivalent of creating spiritual culture.

• Journal of Advanced Marine Engineering and Technology
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• 제34권6호
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• pp.852-857
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• 2010

본 논문에서는 조명으로 사용되는 LED를 이용하여 실내 가시광 통신을 할 수 있는 시스템을 제안하고 있다. LED는 디지털 변조가 가능하므로 조명과 더불어 광무선 통신시스템으로 적용할 수 있다는 개념과 연구결과에 기인하여 기초연구를 수행하였다. LED는 고 휘도, 신뢰성, 저 전력 소비, 긴 수명의 장점을 가지므로 고 품질의 통신서비스를 제공하는 통신용 광원으로서도 적합하다. 본 연구에서는 오디오 전송을 위한 단방향 광무선 통신시스템과 텍스트 메시지를 전송하기 위한 양방향 통신시스템을 구현하여 통신 성능을 실험하였다. 이 실험결과는 실내 무선 환경을 지향하는 조명등의 내부회로로 설치될 수 있는 저가형 광통신 트랜시버의 구현이 가능함을 보여준다.

• 복식문화연구
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• 제12권5호
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• pp.819-831
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• 2004

Under the social conditions that an understanding of a men change socially and men's interests in their appearances are on the increase, this research intends to study and analyze the changes of people's sensibility of values on ads for men's cosmetics, which is said to be performed the social, cultural function reflecting the social consciousness, the value and the idea creating a new one. The documents for the research was sindonga. The ad showed that they've changed making a difference according to the times. In 1970s, it expressed a man for cleanness and modernity living in urbanized and modernized society. On the other hand, it expressed a man who won success socially and enjoyed a comfortable life in a dignified manner, or a man who was fond of sports leisure activity pursuing a clam and composed life and was interested in the skin and an appearance in 1980s. From 1990 to 2002, it expressed a man of challengeable manly beauty having a strong will toward social achievement, or a man who has a sweet manly beauty with sex appeal to a woman. Besides, it expressed a man who is soft, faithful and affectionate with a liberal and peaceful atmosphere as well.

• 한국생활과학회지
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• 제11권3호
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• pp.287-299
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• 2002

Post-modernism exists with different shapes in overall cultural phenomena. Among the creative methods of composing post-modernism, there are representation, parody, plural coding, trans avant-garde etc. Summing up the influence of creative method of post-modernism on modem fashion led to the following results. 1. The phenomenon appears that value and valuelessness are easily reversed, and things with historical and traditional meanings are being ignored. 2. The boundary between higher culture and public culture is being disorganized, and mixed imitation phenomenon ignoring the differences between male and female is emerging 3. The mental and historial aspects in fashion pattern are highly thought of and the trend to understand human body from the various angles emerges. 4. In the consumer-oriented society, it appears in the form of meanings to achieve the self-achievement in individual life, to express one's idea and desire in the esthetical point of views. 5. It shows that through arranging the striking things and the distorted things, it takes the compromised method of re-appreciating the existing ideas. The phenomena in the post-modernism occurring in fashion design forced the concept of the uniformed existing fashion to be changed, creating a various fashions. That can just be called the dehumanization trend in the era of post-modernism, which is the most important formative feature in modern fashion.

• 한국농촌건축학회논문집
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• 제12권2호
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• pp.117-124
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• 2010

This study has the purpose to examine the elements of deducing site plan of contemporary architecture in Jeju by looking into the mainly used measures and value in establishing the site plan of contemporary architecture of Jeju. Being the initial decision making stage that serves as basis in creating design alternative and completes overall designing alternative frame, Site plan is the core stage of initial architectural planning. In addition, analysis of site plan concept the central overall idea for site plan offers the perspective to access the problem for solution in site plan. Therefore, through the analysis of elements to deduce the site plan concept of the contemporary architecture in Jeju, the characteristics of site plan concept that considered the placement and locality of Jeju can be objectively examined in planning out the site plan of contemporary architecture in Jeju, and such analysis results may become objective basic data in planning out the site plan of the contemporary architecture in Jeju.

• 한국가구학회지
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• 제14권1호
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• pp.35-45
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• 2003

It has shown that the investment on the new products have a direct influence on the price of manufactured goods. This brings about a point, which has been a common problem for many Korean enterprises. That is Korean products can only its international competitiveness from the price, not quality. Our industry has shown its movement from producing cheap, low quality products to creating somewhat more advanced and higher qualify products. However the industry cannot avoid the financial burden from the investment. Just like the title of this article, for existing the 3D-MODELING, the 3D-CAD is existed first has immediate effect on the many developing processes, such as planning a product, designing, and producing. The development of the furniture design in the future will be done in the same way as this article presents. This will have a great effect on the overall productivity. (Time, cost, efficiency and etc). The simulation experiment on this article is based on the idea of development of industry, forms the immediate constituent for the prediction related to the production development, marketing and the trend. Which means, this will play an important part where companies achieve satisfaction from the marketing part and the economy.

• Journal of electromagnetic engineering and science
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• 제16권2호
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• pp.134-142
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• 2016

This paper proposes a technique for improving the conventional conical horn antenna for the X-band frequency using metamaterial on a wire medium structure. The main idea of this research is the application of the wire medium metamaterial to the conical horn's aperture for the enhancement of the horn's gain; this is done without changing the antenna's dimensions. The results show that the wire medium structure can increase the gain of a conventional conical horn antenna from approximately 17.7 dB to 20.9 dB (an increase of approximately 3.2 dB). A prototype antenna was fabricated, and its fundamental parameters including its reflection coefficient ($S_{11}$), radiation patterns, and directive gain were measured. The simulated and measured results were very good. The wire medium structure of the proposed antenna improved the radiation pattern, enhanced the directivity, increased the gain, and reduced the side lobe level using a simple integrated wire medium structure.

• 한국정보통신학회논문지
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• 제11권7호
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• pp.1235-1241
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• 2007

컨버전스는 디지털 기술 기반의 제품과 서비스가 융합되고, 새로운 형태의 제품과 서비스를 창출하는 것으로부터 시작하여, 소비자 요구의 다양화, 사회 트랜드에도 반영되어, 다양하고 빠르게 진행되고 있다. 따라서 본 논문에서 u-Gov가 추구하는 행정의 이념을 달성하기 위하여 컨버전스 진화에 의한 u-Gov의 역할로써 국내의 전자정부 컨버전스 시도로 올 수 있는 영향과 정책 마련의 필요성을 가지고, 컨버전스 사회변화에 따른 활용사례를 제시하고, 여기에서 나타날 수 있는 이점을 고찰하였다. 그리고 컨버전스 이슈의 분석을 통해 향후 컨버전스 정책추진 방향을 제시하였다.

• 한국초등과학교육학회지:초등과학교육
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• 제37권4호
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• pp.416-429
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• 2018

In social constructivist teaching, knowledge construction is achieved through learners' collective social interaction. Vygotsky argued that this process is mediated with language use, and the development of higher order thinking is realized through the transition from inter-personal psychological functions to intra-personal psychological functions. In so doing scientific concepts are internalized to learners. This study examined the third grade elementary students' inter/intra-personal psychological functions and their internalization processes during social constructivist teaching plan about strata and fossils. The lessons were designed along with Wells' dialogic inquiry and Leach and Scott's social constructivist teaching-learning sequences. Results showed that a teacher's utterances of talking with questioning to switch attention, creating cognitive disequilibrium, and expanding the width of students' opinions could make effective inter-personal psychological function. In addition, a learner's inner speech expressed into social discourse through talking about personal experiences, comparing epistemic idea with visual representation, or applying to different situation showed his/her intra-personal psychological function. Some cases of learners' internalization through language use could be at the stage of knowledge building and understanding of the spiral of knowing, but not all. Thus it is argued that a teacher's deeper insight into Vygotskian social constructivist teaching can make elementary science classroom teaching more effective in their inter/intra-psychological functions.