• Smart Structures and Systems
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• 제18권4호
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• pp.787-800
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• 2016

The aim of the paper is to analyze nonlinear transverse vibration of an embedded piezoelectric plate reinforced with single walled carbon nanotubes (SWCNTs). The system in rested in a Pasternak foundation. The micro-electro-mechanical model is employed to calculate mechanical and electrical properties of nanocomposite. Using nonlinear strain-displacement relations and considering charge equation for coupling between electrical and mechanical fields, the motion equations are derived based on energy method and Hamilton's principle. These equations can't be solved analytically due to their nonlinear terms. Hence, differential quadrature method (DQM) is employed to solve the governing differential equations for the case when all four ends are clamped supported and free electrical boundary condition. The influences of the elastic medium, volume fraction and orientation angle of the SWCNTs reinforcement and aspect ratio are shown on frequency of structure. The results indicate that with increasing volume fraction of SWCNTs, the frequency increases. This study might be useful for the design and smart control of nano/micro devices such as MEMS and NEMS.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2006년도 추계학술발표논문집
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• pp.290-293
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• 2006

본 연구는 웹 기반 선례검색 시스템을 개발하였다. 기존의 연구들에 대한 사례 조사를 통해서 지금까지의 선례 검색 방법의 한계: 변환과정에서의 의미 손실과 자료 공유의 시공간제한성 밝혔다. 해결책으로 의미기반 공통표현모듈을 도입하고 웹 환경을 이용하여 효과적인 선례검색 해결방법을 찾아냄으로써 검색과 자료 공유가 용이한 선례검색 시스템을 개발했다.

• 한국산학기술학회논문지
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• 제11권9호
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• pp.3590-3598
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• 2010

지역차원에서 연안구역을 효율적으로 관리하기 위해서는 정확한 해양 및 연안공간정보의 확보, 이를 분석할 수 있는 객관적 분석방법, 그리고 이런 연구결과를 정책에 반영할 수 있도록 하는 과학 기술적 지원체계 구축은 필수적 과제라 할 수 있다. 따라서 본 연구는 미국 연안구역(Coastal Zone)의 사례에서 나타난 조닝(Zoning)방식과 이종 Data간 통합방법을 중심으로 그 특성을 조사 분석하였다. 이를 통해 나타난 공통된 특성은 연안의 가치와 이용특성을 반영할 수 있는 구체적인 설정기준과 지표 마련, 공간의사결정을 위한 Data 가공 및 분석방법, 해양 및 연안공간정보 구축 및 통합을 위한 전담기구의 설치 운영 등으로 도출되었다. 마지막으로 본 연구는 미국 연안구역의 관리수단 즉, 조닝방식과 이종 Data간 통합방법에 나타난 공통의 가치를 바탕으로, 지역차원에서 국내 연안구역(Coastal Zone)관리 시스템을 올바르게 구축하기 위한 기술적 시사점을 제시하였다.

• 한국실내디자인학회논문집
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• 제22권2호
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• pp.203-210
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• 2013

The purpose of this study was to investigate and analyze the function and scale on aspect of construction planning with examples of exhibition and convention facilities constructed recently in domestic and foreign area. Also, it was to provide the result for basic data for construction planning and architecture of similar facilities constructed later. The study methodles, but they had characteristics to use the space with compound purpose for exhibition, conference, etc through installing multi-purpose hall. Finally, for effective construction planning of exhibition and convention facilities, it was required to decrease the ratio of common area gradually and derive rationalization of whole space composition by deriving complexity of function rather than planning of single purpose of each facility for exhibition and conference function. was to analyze the characteristics of construction planning for composition and scale of exhibition, conference, public use, support, maintenance functions, etc and placement composition of unit rooms by each floor on the basis of internal area of exhibition and convention facility in Korea and Japan. As the result of analyzing 10 examples(K1~J5), the placement of auditorium and multi-purpose hall was affected according to location of exhibition room and conference room in the composition of unit rooms by each floor and the installment ratio of support facility in Korean examples was higher than in Japanese examples. In case of facility scale, the Japanese examples were overall small in the whole scale relatively to Korean examp.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제24권4호
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• pp.47-57
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• 2018

Purpose and Methods: Currently, Korea has the lowest fertility rate among OECD countries. It is also true that from the aspect of encouraging childbirth policy, as the use of automobiles has increased, the interest in securing parking spaces has also become more important. However, there are efforts and researches on the supplying parking spaces for the general public in society not to the positive discrimination such as elders or pregnant women. On the other hand, there is a growing need for a dedicated parking space for pregnant women due to the changing social environment and increasing number of female drivers. At this point, proper design of the maternity parking spaces is essential. Therefore, this study is analyzing the characteristics of pregnant women such as measurements and certain actions and case studies of domestic and oversea. Through the analysis of these factors, the following results were derived. Results: First, it was determined that the important factor in the planning of the parking-block for pregnant women was the human body size of pregnant women. And the required dimensions of movement of pregnant women were derived. Second, the dimensions of automobile were analyzed and applied from the most used vehicles in the family composition. Third, after the observations, the status of the parking spaces of the pregnant women and observations showed that the drivers not only the pregnant women but others were using the spaces improperly. Fourth, at certain conditions of the parking spaces, in order to improve the efficiency of the parking spaces, it is necessarily considered that the usage of designated accessible parking spaces can be used together by not only the disabled but also to the passengers who are classified as 'transportation weak' such as pregnant women. Implications: In this study, the researcher will propose the shape and size of the parking-block for pregnant women considering the elements derived above.

• 한국건축시공학회지
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• 제17권2호
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• pp.175-181
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• 2017

본 연구는 초고강도 섬유보강 콘크리트의 인장강도 특성을 파악하기 위한 일환의 연구로서 직접인장시험에 의한 노치가 도입된 시험체의 인장성능을 파악하기 위하여 시험변수는 목표 설계기준강도 120, 150 및 180MPa를 대상으로 하였으며, 양생조건을 일반 수중양생과 $90^{\circ}C$ 고온증기 양생조건으로 하여 그 특성을 검토하였다. 전반적으로 노치타입의 직접인장강도 시험체는 기존 직접인장 시험체에 비해 중앙균열 유도가 효과적인 것으로 나타났으며 데이터를 직접 인장강도-변형률 그래프로 나타낸 결과 먼저 재령 측면에서는 28일에서 56일로 진행할 때의 강도 상승이 가장 높은 것으로 측정 되었으며, 양생조건 측면에서는 고온증기 양생의 경우 수중양생의 비해 초기 강도가 높으나 장기 재령에 가까워질수록 두 가지 양생조건의 직접인장강도 차이가 미비해지는 것을 알 수 있었다. 최대인장강도는 수중양생의 경우 모든 목표설계강도가 재령이 증가할수록 일정하게 증가하는 것으로 나타났으며, 증기양생의 경우 재령 7일에서 초기강도 발현 효과로 인해 상당히 증가하는 경향을 나타내었다. 초기균열 강도는 수중양생의 경우 재령경과에 따라 증가하며, 증기양생의 경우 7일에서 수중양생에 비해 높은 것으로 나타난 반면에 28일 강도는 저하하는 경향을 나타내었다. 이부분에 대해서는 강섬유의 배열상태 등의 검토가 필요할 것으로 사료된다.

• 한국의류산업학회지
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• 제16권5호
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• pp.706-718
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• 2014

Ideology which symbolizes the belief system about the order of human society represents itself in a concrete form through dress which reflects material and conceptual world. In the early 1960s Korea, where a civil revolution and a military coup took place, good examples of dress representing ideology could be found. This study investigates the dress representing ideology of the period, and examines its manifestation and aspect of transition. Literature survey and case study were conducted. The following results were obtained: First, dress representing ideology was symbolically verifying its differences and was changing with the course of time. There were the flow going down from the government, and the flow going up from the movement of the civilian. Through this process, design elements of ideological dress were combined in a dialectic way to form a new representational dress such as Jaegunbok. Second, costly and luxurious clothes meant a tool to rule over people, and the opposition was uniform meaning equality. In 1960 Korea, black waves of school uniforms appeared to lead the social change. A year later, the military government seized power in a 5.16 coup and it enforced uniform upon every people to achieve equal austerity and modernized spirit. Lastly, cotton, which was originated from Gandhi's movement in India, was symbolizing nationalism till the early 1960s in Korea meaning the funding own development with own resources.

• 한국의상디자인학회지
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• 제3권1호
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• pp.57-76
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• 2001

This study was intended to make a comparative analysis of the plastic features of Korean and Japanese dragon patterns found in the process of recreating traditions in comtemporary fashion based on the investigation into the style of expression in relation to the origin, formative evolution, symbolism and traditional costume of the dragon. The form of the dragon has evolved with some similarity and peculiarity between both countries and been changed into many kinds and diverse forms such as the humorous dragon pattern of the Yi Dynasty and the simplified and designed dragon pattern symbolizing the Japanese family crest and the like, Its symbolism has lasted in terms of the sacrificial object, royal power, good omen, Buddhist guardian and the like. There is a difference in the aesthetic sense due to the different traditions and cultural background between Korea and Japan, and the dragon pattern found in the process of recreating the tradition in comtemporary fashion manifested itself as the peculiar aspect. An attempt was made to make a comparative analysis of the dragon pattern found in comtemporary fashion between Korea and Japan. The following results were obtained: First, the commonality between both countries was to make a contemporary expression of the dragon pattern, which was expressed in a realistic form because of a traditionally inherent strong image of the dragon. On the other hand, the designed dragon pattern rarely found expression. It can be said that carefully treating the dragon pattern is attributed to the Oriental thinking like this. Second, Korean people have arranged one or more simplified dragon patterns taking on a form of the coiling dragon in the composition of the scattered point and made a comtemporary expression of them by the contrast of black and white shading in Korea. And the humorous form of the dragon pattern manifested itself in the Yi Dynasty. On the other hand, the case of printing the dragon pattern in the black dragon sword of all over the Kabuki costume in a pictorial composition has frequently appeared in Japan. And Japanese people have expressed its lightness and briskness rather than the dignity and strength that the dragon pattern gives with the use of strong color tones and new materials.

• 한국의류학회지
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• 제38권5호
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• pp.769-782
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• 2014

This study considers the correlation between model pose and clothes in Patrick Demarchelier's fashion photos as well as expression characteristics. The conclusions of the study are as follows. The type of model pose in Patrick Demarchelier's fashion photos can be categorized into five types: maximized type of upper and lower body part, minimized type of upper and lower body part, maximized type of upper body and minimized type of lower body part, minimized type of upper body and maximized type of lower body part, basic type of upper and lower body part. In case of having examined the correlation between body movement and costume, the clothes in the model pose included in the maximization of the body were formed mainstream by silhouette, which was formed by decorative elements or full drapery. In the model poses included in the reduction of the body, the costume tended to expose many parts of the body to provide a simple or structural silhouette form. The costume was expressed in colorful form and poses assumed without body movements. The expression characteristics of the model poses in Patrick Demarchelier's fashion photos were sensuality, dynamicity, and simplicity. First, sensuality was expressed as feminine sensuality accompanying an erotic mood by naturally emphasizing a woman's breast or leg by reducing the body. Second, dynamicity provided a vividness to the image as if directly living and moving by highlighting the rhythmic aspect of the body. Simplicity aroused the effect of paying attention to clothes or other incidental elements rather than the image expressed by the body of a model by excluding body movement.

• 한국안전학회지
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• 제38권1호
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• pp.70-77
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• 2023

Gas has replaced coal or petroleum as primary fuel because of its convenience. However, gas has risk of fire, explosion, or poisoning. To reduce gas-related accidents, many strategic projects have been being carried based on 'Gas Safety Management Basic Plans' on a domestic scale. In spite of those projects, the gas-related accident rate did not decrease over past decades. Thus, this study was conducted to analyze the effectiveness of ongoing projects, and to find out ways to make improvements. Conventional statistical analyses on accident data published by gas-related institutions were not useful to determine meaningful attributes to predict future. Whereas, accident case analyses adopted in the present study discovered differences in the type of people and their unsafe acts for each gas type. Meanwhile, the overall average priority of projects was not high in the aspect of System Safety Precedence. If the current trend is maintained, with sigmoid functions, it can be estimated that mean annual accident rate will decrease by only 2.0% in the next two decades. To improve the current trend, the present study made conclusions as followings: (1) safety projects should be designed with careful consideration of accident traits including gas type, unsafe acts, and persons involved and (2) alternative strategies should include system considerations such as minimum hazard design and safety devices prior to mere education or training. To summarize briefly, the present state related with gas accidents highlights the necessity of a system-based multidisciplinary approach.