• Geomechanics and Engineering
• /
• 제21권1호
• /
• pp.73-84
• /
• 2020

In the seismic design of bridges, formation of plastic hinges plays an important role in the dissipation of seismic energy. In the case of conventional fixed-base bridges, the plastic hinges are allowed to form in the superstructure alone. During seismic event, such bridges may be safe from collapse but the superstructure undergoes significant plastic deformations. As an alternative design approach, the plastic hinges are guided to form in the soil thereby utilizing the inevitable yielding of the soil. Rocking foundations work on this concept. The formation of plastic hinges in the soil reduces the load and displacement demands on the superstructure. This study aims at evaluating the seismic response of bridge pier supported on rocking shallow foundation. For this purpose, a BNWF model is implemented in OpenSees platform. The capability of the BNWF model to capture the SSI effects, nonlinear behavior and dynamic loading response are validated using the centrifuge and shake table test results. A comparative study is performed between the seismic response of the bridge pier supported on the rocking shallow foundation and conventional fixed-base foundation. Results of the study have established the beneficial effects of using the rocking shallow foundation for the seismic response analysis of the bridge piers.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
• /
• 제49권3호
• /
• pp.180-187
• /
• 2000

A moving-coil-type linear oscillatory actuator(LOA) consists of the NdFeB permanent magnets with high specific energy as the stator, a coil-wrapped nonmagnetic hollow rectangular structure. The LOA system was represented by the voltage equation of coil and the mechanical equation of motion. This set of equations was manipulated in state-space form. The EMF constant kE of equation parameters in state-space form can be obtained by using the induced voltage in armature coils at open circuit test. kE and other parameters provide the system matrices and transfer function for frequency response and dynamic simulation. Voltage source inverter-fed LOA is examined aiming to compare with results of simulation.

• 한국비블리아학회지
• /
• 제15권1호
• /
• pp.91-116
• /
• 2004

본 연구는 국내 도서관에서의 오픈액세스 지식정보저장소 구축을 위한 기초연구를 목적으로 수행되었다. 기관에서 구축한 지식정보저장소는 개별기관 소속 교수나 연구자에 의해 생산된 지식정보자원을 오픈액세스 패러다임에 기초하여 수집, 관리, 배포, 보존하기 위한 새로운 개념이다. 이에 지식정보저장소의 필요성, 역할, 구성요소, 구축 장애요인 등을 고찰한 후 SHERPA, Dspace, eDoc Server, dCollection 등 국내외의 대표적인 사례를 살펴보았다. 또한 지식정보저장소 구축 모형 및 이를 성공적으로 구현하기 위한 고려사항을 참여집단별로 제안하였다.

• 건축역사연구
• /
• 제16권2호
• /
• pp.43-58
• /
• 2007

This paper attempts to interpret the meaning of Mies van der Rohe's famous aphorism that "less is more" in terms of space. From his assertion that the art of building is the spatial execution of spiritual decisions, one can presume that his art of building was revealed through his spatial execution consciously guided by creative principles. One of his spatial principles was less is more a representative motto for the creation of sparsely furnished space with few objects and little perceptible architecture. After his awareness of an open plan, Mies intended to create less architecture by designing a minimal form of structural frames and maximum openness of open plans and glazed walls. This study posits that Mies created more potential space, for which he intended his open plans and neutral frames to be viewed as less. His building was designed to serve as the background of works of art and the changing nature outside so restrained its own existential voice in favor of the achievement of total harmony.

• 한국융합학회논문지
• /
• 제11권5호
• /
• pp.145-151
• /
• 2020

서비스 유료화로 제공되는 해외 전자저널의 구독료 상승은 국내 대학들의 라이센스 갱신을 더욱 어렵게 만들고 있다. 미국의 대학들과 유럽의 일부 정부에서는 구독료 상승문제를 해결하기 위한 목적으로 여러 형태의 오픈액세스 모델을 파일럿 형태로 시도하고 있다. 한편, 국내에서는 아직 오픈액세스 접근 모델에 대한 연구자들 사이에 필요한 논의가 적절히 이루어지지 않았고, 새로운 라이센스 계약 사례도 찾기 어려운 상황이다. 이 논문에서는 미국과 유럽에서 Elsevier 출판사를 상대로 시도되는 오픈액세스 기반의 다양한 모델을 소개하였고, 국내에서의 적용 가능성도 정성적으로 살펴보았다.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2014년도 춘계학술대회
• /
• pp.63-65
• /
• 2014

오픈소스 소프트웨어는 라이선스 비용이 없이 정액제의 구독(Subscription) 방식으로 서비스를 하는 특성이 있다. 이러한 비즈니스 방식은 라이선스 비용과 유지보수 서비스를 통해 과금하는 상용 소프트웨어와는 다른 방식으로 대가 산정이 이루어져야 한다. 하지만 이러한 특성에 대해 공공부문을 포함한 시장 수요자의 이해도가 낮아 오픈소스 소프트웨어를 통한 비즈니스가 활발히 펼쳐지는데 한계가 있는 상황이다. 이에 여러 선행 연구 및 시장 사례를 조사하고 발전시켜 오픈소스 소프트웨어 비즈니스에 적용할 수 있는 대가 산정 기준에 대한 모델을 제시하고자 한다.

• BMB Reports
• /
• 제53권9호
• /
• pp.453-457
• /
• 2020

The right-handed double-helical structure of DNA (B-DNA), which follows the Watson-Crick model, is the canonical form of DNA existing in normal physiological settings. Even though an alternative left-handed structure of DNA (Z-DNA) was discovered in the late 1970s, Z-form nucleic acid has not received much attention from biologists, because it is extremely unstable under physiological conditions, has an ill-defined mechanism of its formation, and has obscure biological functions. The debate about the physiological relevance of Z-DNA was settled only after a class of proteins was found to potentially recognize the Z-form architecture of DNA. Interestingly, these Z-DNA binding proteins can bind not only the left-handed form of DNA but also the equivalent structure of RNA (Z-RNA). The Z-DNA/RNA binding proteins present from viruses to humans function as important regulators of biological processes. In particular, the proteins ADAR1 and ZBP1 are currently being extensively re-evaluated in the field to understand potential roles of the noncanonical Z-conformation of nucleic acids in host immune responses and human disease. Despite a growing body of evidence supporting the biological importance of Z-DNA/RNA, there remain many unanswered principal questions, such as when Z-form nucleic acids arise and how they signal to downstream pathways. Understanding Z-DNA/RNA and the sensors in different pathophysiological conditions will widen our view on the regulation of immune responses and open a new door of opportunity to develop novel types of immunomodulatory therapeutic possibilities.

• The Plant Pathology Journal
• /
• 제16권1호
• /
• pp.43-47
• /
• 2000

Citrus tristeza virus (CTV) is the causal agent of one of the most important diseases of citrus. Recently, CTV has been detected in Cheju Island by ELISA. The coat protein (CP) gene of CTV isolated form Cheju Island was cloned by RT-PCR and the nucleotide was analyzed in this study. Citrus leaves were collected from trees showing decline symptoms from various region of Cheju Island in the summer of 1998 and 1999. The CP gene open reading frame is composed of 670 nucleotides and encodes a polypeptide of 223 amono acids. Sequence analysis the CP gene revealed that two CTV strains present in Cheju Island. Viruses collected form Sogwipo area and Cheju City area in 1999 ahowed 91-93% nucleotide sequence homology with CTV T36 strain. Viruses collected form Cheju City area in 1999 and Sogwipo City in 1998 showed 94-98% nucleotide sequence homology with CTV SY568 strain. A efficient viral RNA extraction methods was developed by modifying procedure for animal virus RNA purification methods and PCR product was detected form one tenth of RNA purified from as small as 45 mg fresh or frozen tissue.

• 건축역사연구
• /
• 제4권1호
• /
• pp.113-140
• /
• 1995

This thesis is a historical research about the Foreign Settlement at Mokpo as the fourth among the Open Ports which express the historical characters of Korean Modern, as a city which did not exist before the Korean Modern. So I analyzed positively the process of establishment and the process of urban form during the period which contained the characters of Concession, from 1897 to 1910. Even though the urban basic form of the Foreign Settlement at Mokpo was planned by Korean Goverment, it's townscape was changed to Japanese style by Japanese since Mokpo port was opened. Because it had settled by Japanese residents which had majority. But I found that the urban form was not composed by the Modern urban planning theory or method, but by the existing conditions such as topography and roads. The center in the settlement had shifted from the front region of Japan Consulate to the East region which was in the vicinty of Korean village. And also former internal oriented urban form had changed to the relevant composition with Korean village. All the changes in the Foreign Settlement at Mokpo was made by the Japanese which had majority, and it is a good example which expresses Korean Modern history.

• 복식문화연구
• /
• 제19권4호
• /
• pp.805-819
• /
• 2011

In contemporary society, heterotopia is the law dominates thoughts and is the concept reconstituted spaces calls order in chaos. And that is the place which refuses the paradoxical and social custom and sometimes poses a danger and rise in rebel. The purpose of this study is to study how forms of clothing fluid form images are expressed in modern fashion develop body around in the spatial relationship between the body and its environment. The study method consider changed characterastics of fluid space through the heterotopia thinking system of Foucault Michel. Based on this method, the heterotopia space that appeared in the plastic arts in aspects of artistic significance and aesthetic value was examined. Based on the above discussion on modern fashion Fluid Form were expressed in any formative characteristics were considered. The results of this study are as follows. Fluidity is the transformed interaction. It expanded external representation of organic body structure and reconstructed flexible forms of dynamic structures continuously. Transformation is the new space structure. It constructed invisible transformation and developed convertible dress space by combining a variety of functional overlap and fold. Deconstruction was expressed structural forms, expanding the existing forms in the open structure which have ambiguous boundaries.