• Steel and Composite Structures
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• v.18 no.6
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• pp.1331-1351
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• 2015

Cold-formed built-up members are compression members that are common in multiple areas of steel construction, which include cold-formed steel joints and stud walls. These members are vulnerable to unique buckling behaviors; however, limited experimental research has been done in this area. Give this gap, experimental testing of 71 built-up members was conducted in this study. The variations of the test specimens include multiple lengths, intermediate welds, orientations, and thicknesses. The experimental testing was devised to observe the different buckling modes of the built-up C-channels and the effects of the geometrical properties; to check for applicability of multiple intermediate welding patterns; and to evaluate both the 2001 and 2007 editions of the American Iron and Steel Institute (AISI) Specification for built-up members in pure compression. The AISI-2001 and AISI-2007 were found to give inconsistent results that at times were un-conservative or overly conservative in terms of axial strength. It was also found that orientation of the member has an important impact on the maximum failure load on the member.

• Architectural research
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• v.17 no.2
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• pp.49-56
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• 2015

For more than 100 years, American skyscrapers got along with the change of Modern architecture. However, high-rise building can not be regarded anymore as a monopoly of America. The purpose of this study is to clarify the aesthetic characteristics of Asian high-rise buildings. Basic concepts on the aesthetic and artistic expression of high-rise building have been discussed, emphasizing the importance of artistic characteristic. A brief introduction on the rise of Asian high-rise buildings also summarized in terms of changing trends for decades from 1970s. Among the 75 buildings in Asian countries out of 100 tallest buildings in the world, 10 buildings are selected to clarify the artistic characteristics which can be presented as an Asian trend in 21st century. The results can be summarized as follows; It was from 1990s that the Asian high-rise buildings began to express a specific regional aesthetics as a trend of post-modernism. Conventional ideas, traditional objects, and regional shapes and patterns are good instruments to successfully represent their national prides. Religions in Chinese and Islamic culture are popular motifs in Asian countries as well as feng shui and conventional idea of five primary elements. Traditional objects like pagoda and minaret are good precedents that can provide friendly recognized vertical objects. Many other interesting cases can be found referring to the traditional shapes and patterns like Chinese character, geometric pattern, Islamic sign, etc.

• 한국태양에너지학회:학술대회논문집
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• 2009.11a
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• pp.330-335
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• 2009

kDomestic studies on meteorologicaldata have been carried out, however they were mostly not constant but limited to fragment compilation. The studies on solar energy, among others, have been relatively active but the measurement of solar irradiance is also limited to some extent. This study, in an effort to identify the difference in data between solar radiance and cloud cover, was intended to compare and analyze the typical meteorological data developed by Korean Solar Energy Society with the solar irradiance calculated using the typical meteorological data and cloud cover data provided by current simulation program. Monthly average solar irradiance from the meteorological data (ISO TRY) of Korea's typical meteorological data which was actuallymeasured appeared to be far below the monthly solar irradiance from the American Department of Energy. The solar irradiance calculated based on cloud cover indicates very limited difference between the two data, so the solar irradiance measured by Korean typical metrologicaldata (ISO TRY) indicated the similar value, which demonstrates the solar irradiance data from Korean Meteorological Administration is more accurate than those US National Weather Center.

• Journal of the Korean Institute of Landscape Architecture
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• v.23 no.1
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• pp.189-214
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• 1995

본 연구는 미국의 건축 및 조경공간 형성에 미친 일본문화를 파악하기 위한 기초연구로서, 일본문화 및 공간디자인의 특성과 미국건축 및 조경에 나타난 그 면모에 관한 것이다. 1853년 미국과 일본의 문화교류를 시작으로 일본의 예술과 건축이 미국에 소개되었고, 특히 1893년 Chicago에서 열렸던 Wor1ds Columbian Exposition에서 선보인 일본의 건축물은 당시 미국의 건축가들에게 영향을 주었다. 그후 일본의 공간디인은 건축뿐만 아니라 조경분야에도 영향을 미쳐 현재 미국의 공간디자인을 구성하고 있는 특성 가운데 하나로 자리잡고 있다. 필자는 미국의 공간디자인에 영향을 준 일본문화의 실재를 파악하기 위하여 한국과 중국의 문화와 구별되는 일본만의 독특한 문화적 특성을 고찰해보고, 미국 현대건축의 선구자인 Frank Lloyd Wright, Greece and Greene, Philip Johnson, Richard J. Neutra의 작품 및 조경디자이너인 Ethelbert E. Furlong, James C. Rose의 작품속에 나타난 일본식 공간디자인의 면모를 살펴보았다. 장래 이 분야의 연구에서는 미국문화의 특성이 고찰되어 미국과 일본의 두 문화가 비교 파악되기 위한 개념적 근거가 마련되고, 일본식 공간디자인이 미국에서 어떻게 이해되고 해석되어졌으며 미국식 공간 디자인으로 전환되었는지 살펴보며, 어떤 이유에서 일본의 공간디자인 양식이 미국의 건축 및 조경분야에서 문화적으로 일본보다 오랜 역사를 지닌 한국과 중국의 공간디자인 양식보다 커다란 영향을 주고 있는지에 관해 이해를 구하는 방향으로 연구가 수행되어야 함을 제안한다.

• Journal of the Korean Institute of Landscape Architecture
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• v.13 no.2
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• pp.27-36
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• 1985

^x In Korea, we are entering on a new phase that the use concept of urban park is extending to dynamic activities such as games and sports. This article is to investigate the significance of lawn areas, as a receptive space of such a wide range of recreation activities. As a study process, Green Styles (type of parks) such as Garden Type, Park Type and Forest Type were studied and historical review of lawn areas in park development was performed. In conclusion, the lawn areas ( greensward) are an essential part of park and open space organization. The significance as a conclusion is presented as follows : 1 ) Balance in type of parks The structures of our parks and open spaces are inclined toward the artificial Garden Type and natural Forest Type. Therefore, the intermediate Park Type and sparse wood areas should be a core part of our park and open space development. 2) Psychological effect Park Type areas, thorned by greensward(lawn area), can refresh urban dwellers with natural picturesque landscaps, and Park Type landscape is the most preferred natural landscape. It shows the essence of natural amenity as 3) Accomodation of wide range of recreation activities Lawn areas in urban park are the best place in accomodating the wide range of active and massive recreation activities. Thus, lawn areas can increase the freedom of recreation use in urban park. 4) Enlargement of physical carrying capacity. With expansion of lawn areas of euro- american concept, the structural open space can be transformed into service open space. Thus, the recreation carrying capacity of urban parks can be enlarged.

• Structural Engineering and Mechanics
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• v.47 no.4
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• pp.513-530
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• 2013

In this paper, an improved version of particle swarm optimization based optimum design algorithm (IPSO) is presented for the steel grillage systems. The optimum design problem is formulated considering the provisions of American Institute of Steel Construction concerning Load and Resistance Factor Design. The optimum design algorithm selects the appropriate W-sections for the beams of the grillage system such that the design constraints are satisfied and the grillage weight is the minimum. When an improved version of the technique is extended to be implemented, the related results and convergence performance prove to be better than the simple particle swarm optimization algorithm and some other metaheuristic optimization techniques. The efficiency of different inertia weight parameters of the proposed algorithm is also numerically investigated considering a number of numerical grillage system examples.

• International Journal of Concrete Structures and Materials
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• v.6 no.3
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• pp.199-207
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• 2012

Concrete is an economical construction material and for that reason it is widely used in buildings and infrastructures. The use of deicing salts, expansion joint failure, and freeze-thaw cycles have led to concrete bridge girders experiencing corrosion of steel reinforcement and becoming unsafe for driving. The goal of this research is to assess the effectiveness of current and possible repair techniques for the end region of damaged prestressed concrete girders. To do this, three American Association of State Highway and Transportation prestressed concrete girders were tested to failure, repaired, and retested. Three different repair materials were tested including carbon fiber, glass fiber, and surface mounted rods. Each different repair material was also tested with and without injected epoxy. Comparisons were then made to determine if injecting epoxy had a positive effect on stiffness and strength recovery as well as which repair type regained the largest percentage of original strength.

• Journal of Korea Multimedia Society
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• v.21 no.10
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• pp.1211-1220
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• 2018

Maya Deren is well known as the 'mother' of the American avant-garde films by her first short, Meshes of the Afternoon (1943). One of the major contributions of Maya Deren's theoretical body of work to the visibility was the invention of a new vocabulary for independent film-making such as 'film-poems', and 'choreo-cinema'. To create experimental film forms, she chose poetry, dance, architecture and music as a metaphor to describe her images. On the top of these arts, Maya uses camera works and editing system to achieve an 'artificial reality' whose character is miraculous in that living whole, in order to help the audience to experience a protagonist's psychological journey.

• Research in Mathematical Education
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• v.9 no.3 s.23
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• pp.275-284
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• 2005

Tessellations are the pattern of iterations of geometric symmetry and translation. We can find them in the works of Escher who is the famous Dutch artist, and the American Indean life. Also, we can find the beauty of tessellations in the Korean traditional house door, Buddist temple architecture, palace's fence, etc. In the article, the figures of patterns we present are bird, fish, cat, pig, elephant, penguin, child and horse riding man, including Escher's, which are constructed using the computer geometric program, GSP (Geometer's Sketchpad). We want to talk about girl's disposition toward mathematics related to the figures. If they are supported by this kind of interesting figures constructed by their own hands, students will have more interest in learning geometric figures.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.641-644
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• 2010

리차드 모리스 헌트(Richard Morris Hunt)는 19세기 미국의 대표적인 건축가로서 1855년까지 프랑스의 에콜 드 보자르에서 수학하고 미국으로 돌아와서 당시 미국의 대표적인 건축물을 설계하였다. 그는 그 자신의 작품적 특징보다 미국 건축을 절충주의적 경향으로 가도록 이끈 점이 그의 큰 역할로서 여겨진다. 당시의 미국 건축은 유럽의 전통에 비해 새로운 자유와 동시에 영향력 아래에 있었다고 볼 수 있는데 리차드 모리스 헌트는 이러한 신대륙의 건축의 성향을 이끈 대표적인 인물 가운데 한 사람이라 할 수 있겠다. 절충주의의 경향인 외관과 어울리는 실내디자인의 조합은 현대 실내디자인의 출발과도 같은 개념으로서 이러한 절충주의를 대표할 수 있는 리차드 모리스 헌트를 통해 미국건축의 절충 주의를 살펴보고자 한다.