• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.517-518
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• 2018

국내 제약 산업은 상위 30대 기업이 전체 생산 매출의 55.1%를 차지하는 불균형적인 구조를 가지고 있으며, 중소업체들은 공급자 과잉의 힘든 상황 속에 처해 있다. 이러한 가운데 중소제약업체를 중심으로 기존 설비를 활용하여 외국 제약회사의 Original 의약품을 복제한 Generic 의약품을 생산하여 납품하는 OEM/ODM 방식의 위탁생산이 증가하고 있다. 또한 글로벌 바이오의약품을 중심으로 CMO(Contract Manufacturing Organization) 생산에 대한 관심이 높아지고 있다. 본 연구에서는 의약품 위 수탁 사업에 있어서 영업사원의 핵심역량인 정보제공, 전문성, 판매기술, 태도 및 관계형성, 업무유연성이 고객 만족에 미치는 영향을 분석하여 CMO업체의 경쟁력 강화를 위한 방안을 제시하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.283-285
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• 2002

강의시간표 문제(Lecture timetabling Problem)는 일주일을 기본으로 하는 특정 시간대 별로 학생(Course-class), 교수, 그리고 강의실과 같은 자원에 대한 스케줄링 문제로서 각각의 자원에 대하여 적절한 조합으로 제약조건들 사이의 충돌을 최소화하여 자원을 배치하는 할당문제이다. 강의시간표 문제는 수천 명 학생들에 대하여 개개인의 시간표를 작성해야 하므로 기하급수적으로 증가하는 탐색공간에 대하여 최악의 경우 탐색 시간이 지수적으로 증가하는 NP-complete Problem이다. 이러한 거대하고 복잡한 강의시간표 문제는 계층적으로 분할하여 기능별로 처리하면서 제약조건을 협상하도록 하는 각 모듈 단위의 에이전트를 구성하므로 좀 더 작고 단순한 문제로 변환될 수 있다. 본 논문에서는 방대한 탐색 공간과 과잉-제약조건(Over-constraint)문제의 하나인 강의시간표 작성 문제를 분산제약조건 만족 문제 특성을 이용하고 다중 에이전트 구조를 사용하여 해결하는 강의시간표 자동화 시스템 설계를 제안한다.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.47 no.1
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• pp.94-101
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• 2010

Optimization of interconnects among processors and memories becomes important as multiple processors and memories can be integrated on a Multi-Processor System-on-Chip (MPSoC). Since the optimal interconnection architecture is usually dependent on the applications, systematic design methodology for various data transfer requirements is necessary. In this paper, we focus on bus interconnection for MPSoC applications which use 4 ~ 16 processors. We propose a new systematic bus design methodology under performance constraints using Single Arbitration Multiple Bus Accesses (SAMBA) style bus architectures. Optimized bus architecture is found to satisfy performance constraints for a single or multiple applications. When compared to the unoptimized architecture, our method can reduce the bus switch logic circuits significantly (by more than 50% sometimes). Furthermore, low cost bus architectures can be found to satisfy the performance constraints for multiple applications.

• Journal of Korean Association for Spatial Structures
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• v.12 no.2
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• pp.89-98
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• 2012

This study investigates the optimum structural design of space truss considering global buckling, and is to obtain the minimal weight of the structure. The mathematical programming method is used for optimization of each member by member force. Besides, dynamic programming method is adapted for consideration in snap-through buckling. The mathematical modeling for optimum design of truss members consists of objective function of total weight and constrain equations of allowable tensile (or compressive) stress and slenderness. The tangential stiffness matrix is examined to find the critical point on equilibrium path, and a ratio of the buckling load to design load is reflected in iteration procedures of dynamic programming method to adjust the stiffness of space truss. The star dome is examined to verify the proposed optimum design processor. The numerical results of the model are conversed well and satisfied all constrains. This processor is a relatively simple method to carry out optimum design with consideration in global buckling, and is viable in practice with respect to structural design.

• Annual Conference on Human and Language Technology
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• 1999.10e
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• pp.288-293
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• 1999

일반적으로 두 개의 명사가 결합하여 하나의 명사 기능을 하는 어구를 복합명사라고 한다. 한국어는 복합명사 내의 명사를 붙여볼 수도 있고 띄어쓸 수도 있으므로 복합명사의 형태적 분석에 많은 어려움이 있다. 이 연구에서는 각 명사의 복합명사 결합을 최대한 제약하여 문법검사기에서 복합명사와 관련된 오류의 발생을 최소화할 수 있는 방범을 개발했다. 이 논문에서 복합명사 분석 기능을 제약하는 방법으로 형태적 제약 방법과 의미정보에 따라 복합명사의 결합관계를 제약하는 방법을 이용했다. 어휘 정보만으로 복합명사를 분석하면 의미관계에 의한 오류는 찾기 어려우므로 복합명사의 구조적 결합관계와 의미 결합관계를 밝혀 복합명사를 잘못 분석하는 문제점을 극복한다. 복합명사의 결합제약은 명사의 왼쪽과 오른쪽에 올 수 있거나 올 수 없는 명사를 의미, 형태적 특성과 명사가 나타나는 분포(distribution)에 따라 분류하여 규칙베이스화하였다. 의미정보를 이용한 복합명사 결합제약 알고리즘도 구현하였다.

• Journal of Energy Engineering
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• v.11 no.4
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• pp.291-298
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• 2002

This paper presents a practical methodology that can analysis power flow and marginal factors based on optimal power flow (OPF) of power systems under restructuring environment. First of all, to evaluate useful marginal factors, nonlinear optimization problems of minimum fuel cost and minimum transmission loss are formulated and solved by nonlinear primal-dual interior point method. Here, physical constraints considered in the optimization problems are the limits of bus voltage. line overloading, and real & reactive power generation. Also, an evaluation method of marginal price and marginal transmission loss is presented based on sensitivities calculated by the two OPF problems. Especially, to reflect the cost related to transmission losses in the competitive electricity market, an analysis method of MLF (marginal loss factor) is pro-posed. Numerical results on IEEE RTS 24 show that the proposed algorithm is effective and useful for analysis of power market price.

• Annual Conference on Human and Language Technology
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• 2014.10a
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• pp.81-86
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• 2014

한국어 의존 파싱은 문장 내 단어의 지배소를 찾음으로써 문장의 구조적 중의성을 해소하는 작업이다. 지배소 후위 원칙은 단어의 지배소는 자기 자신보다 뒤에 위치한다는 원리로, 한국어 구문분석을 위하여 널리 사용되는 원리이다. 본 연구에서는 한국어 지배소 후위 원리를 의존 파싱을 위한 트랜지션 시스템의 제약 조건으로 적용하여 2가지 트랜지션 시스템을 제안한다. 제안 모델은 기존 트랜지션 시스템 중 널리 사용되는 arc-standard와 arc-eager 알고리즘에 지배소 후위 제약을 적용한 포워드(forward) 기반 트랜지션 시스템과, 트랜지션 시스템의 단점인 에러 전파(error propagation)를 완화시키기 위하여 arc-eager 알고리즘의 lazy-reduce 방식을 적용한 백워드(backward) 기반 트랜지션 시스템이다. 실험은 세종 구구조 말뭉치를 의존구조로 변환하여 실험하였고, 실험 결과 백워드 기반 트랜지션 시스템이 포워드 방식보다 우수한 성능을 보였다. 기존 연구와의 비교를 위하여 기존 연구를 조사하였지만 세부 실험 환경이 서로 달라서 직접적인 비교는 어려웠다. 제안하는 시스템의 최고 성능은 UAS 92.85%, LAS 90.82% 이다.

• Journal of Internet Computing and Services
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• v.4 no.1
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• pp.75-86
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• 2003

In this paper, we extended hierarchial structure of managed object class to support Role-Based Access Control, and described constraint conditions that have support dynamic temporal function as well as statical temporal function established by management process. And we defined about violation notifications should report to manager when rules violate constraint conditions. Also we presented system architecture that support RBAC with MIB(Management Information Base) of ITU-T recommendation. By access control enforcement and decision function, constraint conditions and activated translation procedure of each roles are described, our system presents dynamic temporal property systematically.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.15 no.2
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• pp.281-291
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• 2002

This paper describes the minimum cost design of prestressed reinforced concrete (PRC) hem with rectangular section. The cost of construction as objective function which includes the costs of concrete, prestressing steel, non prestressing steel, and formwork is minimized. The design constraints include limits on the minimum deflection, flexural and shear strengths, in addition to ductility requirements, and upper-Lower bounds on design variables as stipulated by the specification. The optimization is carried out using the methods based on discretized continuum-type optimality criteria(DCOC). Based on Kuhn-Tucker necessary conditions, the optimality criteria are explicitly derived in terms of the design variables - effective depth, eccentricity of prestressing steel and non prestressing steel ratio. The prestressing profile is prescribed by parabolic functions. In this paper the effective depth is considered to be freely-varying and one uniform for the entire multispan beam respectively. Also the maximum eccentricity of prestressing force is considered in every span. In order to show the applicability and efficiency of the derived algorithm, several numerical examples of PRC continuous beams are solved.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.33 no.6
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• pp.419-426
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• 2020

The structural design of the steel eccentrically braced frame (EBF) was developed and analyzed in this study through multiobjective optimization (MOO). For the optimal design, NSGA-II which is one of the genetic algorithms was utilized. The amount of structure and interfloor displacement were selected as the objective functions of the MOO. The constraints include strength ratio and rotation angle of the link, which are required by structural standards and have forms of the penalty function such that the values of the objective functions increase drastically when a condition is violated. The regulations in the code provision for the EBF system are based on the concept of capacity design, that is, only the link members are allowed to yield, whereas the remaining members are intended to withstand the member forces within their elastic ranges. However, although the pareto front obtained from MOO satisfies the regulations in the code provision, the actual nonlinear behavior shows that the plastic deformation is concentrated in the link member of a certain story, resulting in the formation of a soft story, which violates the capacity design concept in the design code. To address this problem, another constraint based on the Eurocode was added to ensure that the maximum values of the shear overstrength factors of all links did not exceed 1.25 times the minimum values. When this constraint was added, it was observed that the resulting pareto front complied with both the design regulations and capacity design concept. Ratios of the link length to beam span ranged from 10% to 14%, which was within the category of shear links. The overall design is dominated by the constraint on the link's overstrength factor ratio. Design characteristics required by the design code, such as interstory drift and member strength ratios, were conservatively compared to the allowable values.