• 한국전산구조공학회논문집
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• 제16권3호
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• pp.281-290
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• 2003

Co Evolutionary Structural Design(CESD) Framework is presented, which can deal with the load design and structural topology design simultaneously. The load design here is the exploration algorithm that finds the critical load patterns of the given structure. In general, the load pattern is a crucial factor in determining the structural topology and being selected from the experts어 intuition and experience. However, if any of the critical load patterns would be excluded during the process of problem formation, the solution structure might show inadequate performance under the load pattern. Otherwise if some reinforcement method such as safety factor method would be utilized, the solution structure could result in inefficient conservativeness. On the other hand, the CESD has the ability of automatically finding the most critical load patterns and can help the structural solution evolve into the robust design. The CESD is made up of a load design discipline and a structural topology design discipline both of which have the fully coupled relation each other. This coupling is resolved iteratively until the resultant solution can resist against all the possible load patterns and both disciplines evolve into the solution structure with the mutual help or competition. To verify the usefulness of this approach, the 10 bar truss and the jacket type offshore structure are presented. SORA(Sequential Optimization & Reliability Assessment) is adopted in CESD as a probabilistic optimization methodology, and its usefulness in decreasing the computational cost is verified also.

• 한국콘텐츠학회논문지
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• 제18권1호
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• pp.395-402
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• 2018

본 연구는 영화 <네버 렛 미 고>를 푸코의 권력이론 중 생명권력과 규율권력이 억압하는 사회적 구조에서 권력에 함몰되지 않고 주체적으로 실현하려는 인간의 가치로 분석하고자 한다. 과거 생사여탈권을 쥔 군주권력이 시행하던 신체형은 18세기 이후 생명권력으로 변모하여 인간의 신체를 교정하고 규율에 맞는 능력을 부여하여 기계처럼 작동하도록 하였다. 이러한 생명권력의 통제 속에서 인간은 질병을 치료받고 수명을 연장시키는 안전 욕구를 달성하며, 생산재로서 기능한다. 학교는 생명권력이 효율적으로 작동할 수 있도록 훈육을 통해 신체를 통제하고 규율을 내면화시킨다. 이 영화는 기존 복제인간을 소재로 한 영화들과 차별성이 있다. 복제인간들이 장기 기증자의 역할을 별도의 저항 없이 순응하거나 원본인간과 복제인간의 갈등이 드러나지 않는 점이 그러한 예다. 또한 기존 소설과 영화가 미래를 배경으로 한 것과 달리 1970년대부터 1990년대에 이르는 과거 회고 형식을 띤 점도 그렇다. 이들은 인간의 감정을 가지고 관계에 의존하거나 상실을 경험하며 독립적 자아를 찾고 유한한 삶의 한계 속에서 삶의 가치를 실현하고자 한다.

• 한국통신학회논문지
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• 제21권1호
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• pp.119-130
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• 1996

This paper is the part I of the full study about improved structure of fully interconnected ATM switch to develop the small sized switch element and practical implemention of switch network. This part I paper describes about proposed switch structure, performance evaluations and some of considerations to practical implementation. The proposed structure is constructed of two step buffering scheme in a filtered multiplexer. First step buffering is carried out by small sized dedicated buffers located at each input port. And second step buffering is provided by a large sized common buffer at the output port. To control bursty traffic, we use speed up factor in multiplexing and priority polling according to the levels of buffer occupancy. Proposed structure was evaluated by computer simulation with two evaluation points. One is comparision of multiplexing discipline between hub polling and priority polling. The ogher is overall which should be considered to improve the practical implementation.

• 한국컴퓨터정보학회논문지
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• 제7권3호
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• pp.122-127
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• 2002

스케줄링 알고리즘의 일종인 Inna은 매우 간편하며 각 큐에 다른 가중치를 할당하여 여러 큐를 직접 제어한다. 본 논문에서는 WRR 스케줄링 알고리즘을 효율적으로 수행할 수 있는 새로운 BSW 구조를 제안한다. 또한, 새로운 BSW구조에 적합한 셀 스케줄링 알고리즘을 개발한다 제안된 BSW구조와 알고리즘은 VC에 할당된 가중치를 정확히 유지 한 수 있고, 서비스 받을 VC큐가 비어 있을 경우 다른 VC 셀을 서비스하여 평균 셀 지연 및 최대 버퍼 크기를 감소시킨다. 제안된 알고리즘은 WRR 구현에 매우 적합한 구조이다.

• 건축역사연구
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• 제19권2호
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• pp.21-42
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• 2010

1) The structural system of "Hwaeomgyeong" has its core in the fact it deals with certain themes repeatedly on the basis of "Sipjipum" as a system of discipline.( The key of Euisang's ideas lay in referring to the whole "Hwaeomgyeong" as Beopseong and expressing it with the term, 'Haeng'. Here 'Haeng' is a system of discipline based on "Sipjipum". This indicates that "Hwaeomgyeong" can be fully represented just by "Sipjipum" because the twos are structurally similar) (1) In "Sipjipum", a summary of "Hwaeomgyeong" is contained. Thus descriptions of "Sipjipum" may be like those of "Hwaeomgyeong". (2) "Hwaeomgyeong" had a three-dimensional spatial structure which corresponds with the Heaven of Yok Gye Yuk Cheon and the Earth, when associated with places of preaching Buddhist sermons. 2) This researcher investigated stone platforms of the Buseoksa Temple with references to "Hwaeomgyeong" and "Sipjipum". 1) All the platforms, whether their building is still remained on them or not, comply better with implications of "Sipjipum". 2) Different heights of the stone platforms and the axial refraction of the platforms brought by their shape changes all imply variations in discipline levels descrided in "Sipjipum", in terms of form and symbolic implication. Sites which mainly compose the stone platforms also comply with descriptions contained in "Hwaeomgyeong" regarding the place, frequency and contents of preaching Buddhist sermons. In conclusion, the outside of the Buseoksa Temple is composed of architectural spaces for which contents of "Hwaeomgyeong" and "Sipjipum" and the frequency and place of preaching Buddhist sermons are fully considered and comprehended.

• 한국수학사학회지
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• 제10권2호
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• pp.11-23
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• 1997

Category theory gives a convenient language for the study of mathematical structures besides its own study. In this paper, we investigate how the abstract structure theory emerged in 1930s affects the study in Topology and eventually becomes a rudiment for the category theory. Moreover, various extensions and universal mapping problems were put in their proper perspective as reflections by the category theory and by its duality principle, coreflections become an interesting subject in Topology, both of which give rise to a new discipline of the categorical topology.

• Restorative Dentistry and Endodontics
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• 제45권3호
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• pp.39.1-39.11
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• 2020

Despite the vast literature on the effects of root canal irrigants on the dentin characteristics, the precise effects of clinically relevant irrigation sequences remain unclear. In this review, we systematically dissect the role of different sequential irrigation approaches that are used in clinical endodontics. Using a systematic search strategy, we attempt to answer the question: 'Which irrigating sequence has the most deleterious effects on dentin structure and properties?' The effect of irrigants on the dentin composition and mechanical properties have been reviewed. A wide variety of concentrations, duration and techniques have been employed to characterize the effects of chemicals on dentin properties, thus making it impossible to draw guidelines or recommendations of irrigant sequences to be followed clinically. It was apparent that all the studied irrigation sequences potentially result in some deleterious effects on dentin such as decrease in the flexural strength, microhardness, modulus of elasticity and inorganic content and organic-inorganic ratio of the dentin. However, the literature still lacks comprehensive investigations to compare the deleterious effect of different irrigation sequences, using a wide variety of qualitative and quantitative methods. Such investigations are essential to make clinical recommendations and strategize efforts to minimize chemically-induced damage to dentin characteristics.

• Interaction and multiscale mechanics
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• 제1권1호
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• pp.33-51
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• 2008

This paper investigates the modelling of coupled soil-structure interaction problems by domain decomposition techniques. It is assumed that the soil-structure system is physically partitioned into soil and structure subdomains, which are independently modelled. Coupling of the separately modelled partitioned subdomains is undertaken with various algorithms based on the sequential iterative Dirichlet-Neumann sub-structuring method, which ensures compatibility and equilibrium at the interface boundaries of the subdomains. A number of mathematical and computational characteristics of the coupling algorithms, including the convergence conditions and choice of algorithmic parameters leading to enhanced convergence of the iterative method, are discussed. Based on the presented coupling algorithms a simulation environment, utilizing discipline-oriented solvers for nonlinear structural and geotechnical analysis, is developed which is used here to demonstrate the performance characteristics and benefits of various algorithms. Finally, the developed tool is used in a case study involving nonlinear soil-structure interaction analysis between a plane frame and soil subjected to ground excavation. This study highlights the relative performance of the various considered coupling algorithms in modelling real soil-structure interaction problems, in which nonlinearity arises in both the structure and the soil, and leads to important conclusions regarding their adequacy for such problems as well as the prospects for further enhancements.

• 한국경영과학회지
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• 제20권2호
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• pp.1-10
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• 1995

In this study, a threshold policy is considered for the M/M/2 queueing system with server vacations. The probability generating function for the number of customers present in the system is derived using an embedded Markov chain approach. Then, assuming a linear cost structure, an efficient procedure to find an optimal threshold policy is presented. The Laplace-Stieltjes transofrm for th waiting time of an arbitrary customer under a "FIFO" discipline is also derived.o derived.

• International Journal of Knowledge Content Development & Technology
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• 제8권3호
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• pp.5-28
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• 2018

Socialization of doctoral students refers to the process through which they acquire various types of information about their work, department, university, and discipline for their future careers. This study aims to investigate information behaviors, with emphasis on identifying types of information exchanged in mentoring between faculty advisors and their doctoral students in library and information science (LIS). As a first step to developing a content framework for LIS doctoral mentoring, the author interviewed ten LIS doctoral students from nine U.S. universities. Based on data from these interviews, the author identified sixteen types of information exchanged: language, history, coursework, research, skills, teaching, networking, structure, politics, goals, strategies, values, norms/tradition, rules/policies, benefits, and personal life. In comparison with a content framework used, four dimensions were newly added. In addition to the identification of content dimensions, the author observed four meaningful contextual levels to which the content types can be applied: work, department/school, university, and discipline. The qualitative data also showed that interpersonal factors of advisees/advisors and contextual factors might relate to information exchange in doctoral mentoring. In a following paper, the author will present the results of a follow-up survey that tests and generalizes the findings of this study.