• Journal of the Korean Geotechnical Society
• /
• v.19 no.4
• /
• pp.277-286
• /
• 2003

A constitutive equation was implemented in order to model the behavior in overall ranges from small to large strains, which is based on anisotropic hardening rule and total stress concept. The constitutive model was implemented in ABAQUS code in which large deformation analysis can be performed accurately and efficiently. The formulation includes (1) finite strain plasticity on the basis of Jaumann stress rate, (2) implicit stress integration and (3) consistent tangent moduli. A large deformation analysis was performed with the constitutive model using ABAQUS program. In the analysis of an actual embankment, it was found that the proposed model was formulated accurately and efficiently.

• Proceedings of the KIEE Conference
• /
• 2001.04a
• /
• pp.75-77
• /
• 2001

전기기기 최적 설계에 있어서 결정론적 최적화 방법은 국부해를 빠른 속도로 찾을 수 있지만 최적값에 대한 보장이 어려우므로 비결정론적 방법인 진화전략 알고리즘을 많이 사용한다. 전기기기 최적화에 쓰이는 많은 확률적 알고리즘 중에서 진화 전략 알고리즘은 시뮬레이티드 어닐링과 유전 알고리즘을 결합한 방법으로, 전체 최적점 탐색이 가능할 뿐만 아니라 알고리즘이 비교적 간단하면서도 빠른 수렴 특성을 갖고 있다. 그리고, 종류 또한 다양하다. 진화 전략 알고리즘 중에서 중요한 것은 수렴속도와 성공률에 기여하는 파라미터들을 잘 선정하는 것이다. 본 논문에서는, 진화 전략 알고리즘의 중요한 인자인 자식 세대의 개수인 ${\lambda}$값과 ${\alpha}$값을 변화시켜 가면서 변수 개수에 따른 최적화된 조합을 제시한다. 본 논문의 결과는 전기기기 최적 설계에 응용하는데 도움이 될 것으로 사료된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.821-824
• /
• 2009

Conformal mapping is useful to solve problems in physics, engineering and so on. This paper is to discuss the numerical conformal mapping from the unit disk onto Jordan region, which can be solved by Theodorsen equation. Wegmann's method has been known as the most efficient one for the Theodorsen equation. However, we found divergence through numerical experiments by the iterative method of Wegmann. The divergence occurs especially when some degree of difficulty is high. We analyze the cause of divergence and propose an improved method by applying a low frequency pass filter to Wegmann's method. By this proposed method we can get a stable convergence for all the problems which was unstable with the Wegmann's method.

• Journal of the Korean Institute of Traditional Landscape Architecture
• /
• v.31 no.2
• /
• pp.43-57
• /
• 2013

The purpose of this study is to identify potential semantic landscape makeup of "the Forty Eight Poems of Soswaewon" according to Yin-Yang and Five Elements Principle(陰陽五行論). that speculation system between human's nature and cosmical universal order. Existing academic discussions made so far concerning this topic can be summed up as follows: 1. Among Yin-Yang-based landscape makeups of the Forty Eight Poems of Soswaewon, poetic writings for embodiment of interactions between nature and human behaviors focused on depicting dynamic aspects of a poetic narrator when he appreciates or explores hills and streams as of to live free from worldly cares. Primarily, many of those writings were created on the east and south primarily through assignment of yang. On the other hand, poetic writings for embodiment of nature and seasonal scenery - as static landscape makeup of yin - were often created on or near the north and west for many times. Those writings focusing on embodiment of nature and artificial scenery as a work are divided into two categories: One category refers to author Kim In-hu's expression of semantic landscape from seasonal scenery in nature. The other refers to his depiction of realistic garden images as they are. In the Forty Eight Poems of Soswaewon, the poetic writings show that author Kim focused on embodying seasonal scenery rather than expressing human behaviors. In addition, both Poem No. 1 and Poem No. 48(last poem; titled 'Jangwon Jeyeong') were created in a same place, which author Kim sought to understand the place as a space of beginning and end where yin and yang - i.e. the principle of natural cycle - are inherent. 2. According to construction about landscape in the Forty Eight Poems of Soswaewon on the basis of Ohaeng-ron (five natural element principle), it was found that tree(木) and fire(火) are typical examples of a world combined by emanation. First, many of poetic writings depicting the sentiments of tree focused on embodying seasonal scenery and were located in the place of Ogogmun(五曲門) area in the east, from overall perspective of Soswaewon. The content of these poems shows generation and curve / straightness in flexibility and simplicity. Many of poems depicting the sentiments of fire(火) focused on embodying human behaviors, and they were created in Aeyangdan area on the south of Soswaewon over which sun rises at noon. These poems are all on a status of side movement that is characterized by emanation and ascension which belong to attributes of yang. 3. With regard to Ohaeng-ron's interpretation about landscape in the Forty Eight Poems of Soswaewon, it was found that metal(金) and water(水) are typical examples of world combined by convergence. First, it was found that all of poems depicting sentiments of metal focused on embodying seasonal scenery, and were created in a bamboo grove area on the west from overall perspective of Soswaewon. They represent scenery of autumn among 4 seasons to symbolize faithfulness vested in a man of virtue(seonbi) with integrity and righteousness. Poems depicting sentiments of water were created in vicinity of Jewoldang on the north, possibly topmost of Soswaewon. They were divided into two categories: One category refers to poems embodying actions of welcoming the first full moon deep in the night after sunset, and the other refers to poems embodying natural scenery of snowscape. All of those poems focused on expressing any atmosphere of turning into yin via convergence. 4. With regard to Ohaeng-ron's interpretation of landscape in the Forty Eight Poems of Soswaewon, it was found that poems depicting sentiments of earth(土), a complex body of convergence and emanation, were created in vicinity of mountain stream around Gwangpunggak which is located in the center of Soswaewon. These poems focused on carrying actions of author Kim by way of natural phenomena and artificial scenery.

• Science of Emotion and Sensibility
• /
• v.17 no.4
• /
• pp.89-100
• /
• 2014

Corporations continue to make a lot of efforts to provide more competitive services as the focus of industry is migrating from products to services. This study aims to shed new light on the potential values of the sense for service innovation through design and propose the workshop methodology for deriving sense-based product and service concepts. To this end, this study investigated the literatures related to the product and service innovation cases based on the conventional idea workshop and sense and also the value of sense. Moreover, it systematized the methodology that established the perspective of sense to the conventional idea workshop methodology. To verify the established methodology, this study extracted the elements to be modified and supplemented from the workshop methodology through the previous case studies. As a result of the study, it was possible to verify the validity as to the sense-based idea workshop methodology and reflect the opinions as to the improvement direction. Consequently, this study is regarded meaningful for proposing the approach of a new perspective as to the sense. Also, this study is deemed meaningful for proposing and verifying the specific idea workshop methodology for the approach hereof.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.29 no.1A
• /
• pp.45-52
• /
• 2009

In conventional structural design, deterministic optimization which satisfies codified constraints is performed to ensure safety and maximize economical efficiency. However, uncertainties are inevitable due to the stochastic nature of structural materials and applied loads. Thus, deterministic optimization without considering these uncertainties could lead to unreliable design. Recently, there has been much research in reliability-based design optimization (RBDO) taking into consideration both the reliability and optimization. RBDO involves the evaluation of probabilistic constraint that can be estimated using the RIA (Reliability Index Approach) and the PMA(Performance Measure Approach). It is generally known that PMA is more stable and efficient than RIA. Despite the significant advancement in PMA, RBDO still requires large computation time for large-scale applications. In this paper, A new reliability-based design optimization (RBDO) method is presented to achieve the more stable and efficient algorithm. The idea of the new method is to integrate a response surface method (RSM) with PMA. For the approximation of a limit state equation, the moving least squares (MLS) method is used. Through a mathematical example and ten-bar truss problem, the proposed method shows better convergence and efficiency than other approaches.

• Journal of the military operations research society of Korea
• /
• v.36 no.1
• /
• pp.65-76
• /
• 2010

This study is to apply the Quality Function Deployment Methodology to select the Navy Battle Lab location among possible location sites. The Quality Function Deployment is known to be one of the good methodology in reflecting users' need. Thus the Navy Battle Lab location should b e selected on the basis of satisfying the Navy and ADD requirments. The data to be applied in QFD has been collected from the Navy users and ADD researchers. After carrying out QFD procedures, Jinhae was selected as the best site of the Navy Battle Lab.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.11 no.6
• /
• pp.505-509
• /
• 2001

In this paper, we evaluate the learning ability of non-monotonic DMM(Deterministic Boltzmann Machine) network through numerical simulations. The simulation results show that the proposed system has higher performance than monotonic DBM network model. Non-monotonic DBM network also show an interesting result that network itself adjusts the number of hidden layer neurons. DBM network can be realized with fewer components than other neural network models. These results enhance the utilization of non-monotonic neurons in the large scale integration of neuro-chips.

• Journal of Korean Medical classics
• /
• v.19 no.1 s.32
• /
• pp.207-210
• /
• 2006

${\ulcorner}$상한잡병론(傷寒雜病論)${\lrcorner}$에 나오는 양허증의 병인병리(病因病理)에 대한 내용을 종합하여 검토하고, 그 처방의 구성 약물과 용약 규율에 대하여 살펴본 결과, 양허증을 치료하는 상용약물로는 부자 계지 건강 오수유 생강 등이 쓰였음을 알 수 있었다. 임상에서 약을 사용할 때에는 장부의 생리적 특징에 근거하여 약물을 배합하여야 좋은 효과를 얻을 수 있다. 예를 들어 심양허(心陽虛)에는 계지감초(桂枝甘草)에 복령(茯笭)을 배합하고, 신양허(腎陽虛)에는 진무탕(眞武湯) 신기환 등(等)에 복령(茯笭), 택사(澤瀉), 백출(白朮) 등의 약물을 배합하여, 비양허(脾陽虛)로 인한 담음(痰飮)에는 계지감초(桂枝甘草)의 신감(辛甘)한 약성으로 화양(化陽)하고, 복령(茯笭), 백출(白朮)로 건비리습(健脾利濕)하는 영계출감탕을 사용하며, 심하(心下)에 수(水)가 정체된 경우에는 윗 처방에 사인 백두구 등의 온건비위(溫健脾胃)하고 성비소식(醒脾消食)하는 약물을 가하여 사용한다. 폐양허(肺陽虛)하여 폐위가 된 경우에는 감초(甘草) 건강(乾姜) 등을 사용하여 온폐복기하는데, 이는 ‘배토생금(培土生金)’의 의미이다. 간양허(肝陽虛)가 나타나는 경우는 매우 드문데, 위기가 허한(虛寒)하여 간(肝)이 소설(疏泄)작용을 못할 때에는, 오수유(吳茱萸)로 온위산한(溫胃散寒)하고, 인삼(人參) 대조(大棗)로 보중익기하며, 오수유(吳茱萸) 생강(生姜)의 신산(辛散)작용으로 간기를 다스리는 오수유탕(吳茱萸湯)을 사용하여 강역지구(降逆止嘔)하며, 혼(魂)을 수렴하지 못하여 생긴 실안(失眼)에는 산조인탕(酸棗仁湯)으로 보간(補肝)하여 치료하며, 간경(肝經)에 한사(寒邪)가 침입하여 근맥이 연급(攣急)하게 된 경우에는 지주산(蜘蛛散)을 사용하여 온경산한(溫經散寒)한다.

• Environmental and Resource Economics Review
• /
• v.19 no.1
• /
• pp.23-43
• /
• 2010

This article compares two different auction designs for $CO_2$ emission allowances, namely uniform pricing and multiple pricing, in view of market efficiency. Experimental economic method of Buckley et al. (2004) is applied in this analysis. As a result of this analysis as expected, multiple pricing method brings out Winner's curse. It means that uniform pricing method is more efficient than multiple pricing method.