• 대한기계학회논문집
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• 제9권4호
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• pp.403-413
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• 1985

본 논문에서는 수직벽 하류에 형성되는 박이 전단층의 발전과 재부착 그리고 재발전 경계층에 대해 평균 속도, 벽면의 압력 분포, 난류 강도, 레이놀즈 전단 압력 및 아직 수직벽에 대해서는 보고된바 없는 난류 떨림 속도 성분들의 3승곱 통계치를 측정하여 난류 구조의 변화를 분석하고 이를 수치적 계산 모델개발의 자 료로 제공하고자 함이 이 연구의 목적이다.

• 한국환경복원기술학회지
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• 제4권1호
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• pp.1-15
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• 2001

The purpose of this study is to evaluate the creation techniques of eco-pond, one of biotopes to promote biodiversity in urban residence area. Investigation were classified out plant, mammals, amphibia, reptiles, birds, fishes and insects. The results were summarized as follows: Around the eco-pond shows simple vegetation structurs, consisted of Pinus densoflora S et Z. and Robinia pseudoacacia under competition. In case of shrub, consisted of 4 species but plant growing appearence diversely by seasons. The evaluation of vegetation of eco-pond, there are found 4 species of aquatic plants. Inside the revetment of pond, Echinochloa crus-galli, Persicaria hydropiper, Digiaria sanguinalis, Cyperus microiria and Bidens frondosa L. are mainly distributed. Near the revetment, Trifolium repens L. and Digiaria sanguinalis are prevailed. And in its background, Erigeron canadensis, Erigeron annuus and vines are begins to make their appearances. When evaluation animals in eco-pond and contrast plot, it show simple species and numbers of mammals. It seemed to be resulted from its isolation and outside intervention by users In eco-pond, Pica pica and Streptopelia orientalis are mainly found and in contrast plot of Columba livia, which are so strong adaptation to city life environment. In case of amphibia and reptiles, none is observed in contrast plot, but in ecological pond, Rana nigromaculata and Hyla japonica are constantly observed. In case of insects, more species are found in eco-pond than contrast plot. And in eco-pond, more dragonflies are visibly increased one year after its construction. In floral zone inside of pond revetment, grasshopper and Locusta migratoria are frequently observed. In case of butterflies, they are mainly found in log fence and willow(salix) around eco-pond. In case of fishes inside of eco-pond, the species and its density are remarkable increased one year after the construction. With above evaluation results, we have identify the increase effect of biodiversity after construction of the eco-pond.

• 한국전자파학회논문지
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• 제15권1호
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• pp.73-80
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• 2004

본 논문에서는 기존의 도파관 필터, 즉 내부가 공기로 채워진 밀리미터파 도파관 필터를 기본적인 도파관 변수 계산치로부터 일반 PCB 기판상에 구현하는 방법을 소개한다. 이를 위해서는 기존 도파관 필터의 구조에서 수직으로 배치된 모든 도체구조를(접지용 도체벽, 신호제어용 도체판) via를 사용해 대체해야 한다. 이를 위해 side wall과 도파관 내부 폴들을 via의 연속적인 나열과 via지름 크기의 조절을 통해 구현한다. 이를 통해 얻을 수 있는 장점은 사용될 기판 유전율의 제곱근에 비례하여 전체 크기가 x, y, z축으로 축소되며 특히 z축으로는 더 큰 축소가 가능하다. 또한 기존의 규모가 큰 금속성 도파관 필터를 제작할 필요없이 PCB상에 대량의 제작이 용이하기 때문에 훨씬 저렴하게 제작할 수 있다. 마지막으로 모듈의 소형화를 위해 요즘 한창 각광받는 LTCC 공정과 같은 다층기판 제작시 한층을 사용해 제작될 수 있다는 점에서 유리하다. 이 새로운 도파관 필터를 평가하기 위해 40 GHz 대역에서 2.5 %의 대역폭을 가지는 3차 chebyshev 대역통과필터가 사용되었으며 이에 사용된 PCB 기판은 유전율이 2.2이고 두께가 10 mil인 RT/duroid 5880이다. 설계 후 측정 결과 전체 입/출력단에서 삽입 손실이 2 ㏈ 정도이며 반사손실이 -30 ㏈ 이하의 우수한 특성을 얻을 수 있었다.

• 한국실내디자인학회논문집
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• 제17권6호
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• pp.111-119
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• 2008

This thesis is to make it clear that simulacre concept of is an important factor that provides the motive to make spaces and to make it clear that yard in Korean traditional architecture has more meaning of a container that contains the simulacres of life than formal aspects. Namely, focusing on the simulacres, among existing important factors that cause changes in architectural spaces such as structure, function, beauty, I shall make it clear that simulacre concept, which is a creation thinking of post-structuralism philosopher, Deleuze, is a logic that builds and changes spaces. Also, the purpose of this research is to investigate successive circularity of yard spaces with the mutual relationship between simulacre concept that has virtual multiplicity and yard in Korean traditional architecture, a space of infinite emptiness. When certain simulacres occur in the yard, the ambivalence of simulacres provides meanings to yard by affiliating numerous simulacre factors, then by combination among those meanings, yard get mutual dependence. This is an important core point that I have focused on the beginning of this research. This research has found out the successive circularity of yard based on the relationship between simulacres and the essence of yard. The meaning of this research is to have found out that yard has the meaning of "a bowl that contains the simulacres of life," going over the simple meaning as a space between door and fence. Also, the simulacre concept is thought to be discussed as a motive for creation of various spaces from now on.

• 한국실내디자인학회논문집
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• 제17권1호
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• pp.30-38
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• 2008

Borrowed landscape is an Oriental gardening method to draw inside external natural landscape, and borrowed landscape of Japan has a different characteristic from that of Korea or China nature is manipulated and re-interpreted by human will in the course of applying it to architectural space. In other words, not the original scenery, but manipulated one appears which is cut, reduced, or deleted by architectural elements such as wall, window, or fence. Therefore, this study examined how architectural structure of Ando Tadao symbolizing modernist architecture understood and adopted Japanese traditional views on nature, that is, borrowed landscape. To this end, on the basis of the understanding on 'polymerization of abstraction and form' he mentioned, his geometric architectural principles are discussed, since this serves to be an important beginning of architectural concretization by the concept of 'form' experienced and perceived by human being through geometric means called architecture 'abstraction.' The findings of this study are as follows: first, it was found that Ando Tadao generates borrowed landscape effects by polymerizing and manipulating his simple and geometric structures with each other and thereby editing natural scenery, while Japanese traditional borrowed landscape introduces source scenery inside, through condensation and symbolization. Second, the results of this study revealed that his architecture functions to transcend external and internal realm of a space, which is also observed in Japanese traditional architectural borrowed landscape. Therefore, this study is considered significant in the sense that it proved that Ando Tadao's architectural language is based on borrowed landscape as a specific Japanese traditional element, going beyond the scope of previous studies focusing simply on the introduction of natural elements.

• 한국실내디자인학회논문집
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• 제27호
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• pp.152-161
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• 2001

At the multi-cultural society, research is needed to encourage a social atmosphere for enhanced understanding and respect for different cultures & countries. The purpose was to analyze the characteristics of spatial arrangement, space connection, Interior decoration and the relationship among these three features, which showed each country's unique housing form tradition. Three representative cases of historic residences from each country were selected on the basis of a recognized historic architecture directory. Total 18 residences from 6 countries - Korea, China, Japan, Rome, Egypt, and Italy - were comparatively analyzed. As results, aspects generally found in Eastern countries, were the fence as the semi-open boundary between the inside and the outside of the house, the flexibility of spatial opening and partitions between rooms, and finally simple and movable decoration features. On the other hands, aspects appeared in Western countries, were the outer wall of the building as the boundary to the outside, the closed and fixed properties of the room partitions, and finally complex and fixed decoration features. The research also showed that even within the same culture, the degree of openness varied. Each feature of space was related and could be explained within the same context. Housing, regardless of country and culture, tried to accommodate the exterior space inside the building as much as possible. The common pursuit was transformed to various visible forms and its reason might be due to different socio-cultural and environmental backgrounds that need to be continuously explored in academic area.

• 한국지진공학회논문집
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• 제28권2호
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• pp.93-101
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• 2024

Code-compliant seismic design should be essentially applied to realize the so-called emulative performance of precast concrete (PC) lateral force-resisting systems, and this study developed simple procedures to design precast industrial buildings with intermediate precast bearing wall systems considering both the effect of seismic and blast loads. Seismic design provisions specified in ACI 318 and ASCE 7 can be directly adopted, for which the so-called 1.5S_y condition is addressed in PC wall-to-wall and wall-to-base connections. Various coupling options were considered and addressed in the seismic design of wall-to-wall connections for the longitudinal and transverse design directions to secure optimized performance and better economic feasibility. On the other hand, two possible methods were adopted in blast analysis: 1) Equivalent static analysis (ESA) based on the simplified graphic method and 2) Incremental dynamic time-history analysis (IDTHA). The ESA is physically austere to use in practice for a typical industrial PC-bearing wall system. Still, it showed an overestimating trend in terms of the lateral deformation. The coupling action between precast wall segments appears to be inevitably required due to substantially large blast loads compared to seismic loads with increasing blast risk levels. Even with the coupled-precast shear walls, the design outcome obtained from the ESA method might not be entirely satisfactory to the drift criteria presented by the ASCE Blast Design Manual. This drawback can be overcome by addressing the IDTHA method, where all the design criteria were fully satisfied with precast shear walls' non-coupling and group-coupling strength, where each individual or grouped shear fence was designed to possess 1.5S_y for the seismic design.

• 한국전통조경학회지
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• 제37권3호
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• pp.83-92
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• 2019

본 연구는 명·청 시대 양주 염상원림의 특성을 살펴보고자 문헌자료의 수집, 분석하여 원림조영의 배경을 살펴보았으며, 현전하는 염상원림의 설계방식, 구성요소 등을 살펴본 결과는 다음과 같다. 첫째, 과거 양주지역은 고대 대운하의 구축을 기원으로 문화적, 경제적 발전을 이룩하였으며, 염상들은 부를 축적하면서 무역을 통한 원림조영재료의 확보, 후학양성을 통한 정치적 배후세력 형성, 외래문화 유입 등의 배경 하에 많은 원림들을 조성하였다. 둘째, 양주 지역 염상들은 교류와 휴식의 장소로서 원림을 조성하기 위해 원림전문가들에게 원림 설계를 의뢰, 조영하였으며, 가산과 장랑을 활용한 경관변화 연출, 건축요소를 이용한 공간의 명확한 구분, 물과 인접한 경점에 건조물 배치 등을 통해 실용적이고 미적인 기능을 갖춘 원림들을 소유하였다. 셋째, 양주 염상원림들은 전면의 건조물 중심 상업공간이 위치하고, 후면에는 원림을 중심으로 하는 설계특성을 지닌다. 상업구역의 원림은 건조물 전면부를 중심으로 자투리 공간에 화분이나 괴석, 대나무, 담장문양을 활용한 간단한 형태로 조성하였다. 후면의 원림은 운하와 연결된 물길이 원림 전역에 굴절된 이수체계를 형성하고, 지당과 어우러진 첩석, 석교, 석방 등이 도입되었으며, 다양한 소재와 문양의 포장, 양주 지방의 기후와 색채 대비를 고려한 수목의 도입 등이 설계에 반영되었다.