• 대한전기학회논문지
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• 제41권4호
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• pp.346-354
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• 1992

In the power-system, the active and reactive power levels of load bus randomly vary over days, months, and years which are stochastic in nature. This paper presents an algorithm for optimal Var planning considering the uncertainties of loads. The optimization problem is solved by a stochastic linear programming technique which can handle stochastic constraints to evaluate optimal Var requirement at load bus to maintain the voltage profile which results in probabilistic density function by stochastic Load Flow analysis within admissible range. The effectiveness of the proposed algorithm has been verified by the test on the IEEE-30 bus system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.197-198
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• 2008

In this paper, we study an opportunistic scheduling scheme for the OFDMA system with streaming services. The service is modeled by using the appropriate utility function. We formulate a stochastic optimization problem that aims at maximizing network utility while satisfying the QoS requirement of each user. The problem is solved by using the dual approach and the stochastic sub-gradient algorithm.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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• pp.1108-1115
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• 2003

This paper Introduces a method to automate process design using Case Based Reasoning technique. A case is represented hierarchically through functional requirement, behavioral model, and process mechanism model Specifically, a case retrieval algorithm to use function and behavior, case adaptation method to use hierarchical case representation, and a machine selection method are presented.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 26-27 Oct. 1990
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• pp.41-46
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• 1990

In the existing robot programming methods, off-line method becames important role of programming because of improvement of hardware and software of PC. The purpose of this study is to develop practical robot programming system for polishing task using PC. In the first place, we have investigated the existing robot programming systems, and derived the requirement of this programming system from the existing systems. And we have decided the structure of this system. After that, we have developed this system. Using Windows software, this programming system has man/machine interface function. So users can use easily and quickly.

• 대한산업공학회지
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• 제33권2호
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• pp.227-236
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• 2007

This paper proposes a method for designing stacking warehouses of pyramid type which can be found in storage rooms for steel coils, paper rolls, and drums for oils. Formulas were derived for estimating the expected travel time of cranes and the expected time for rehandling activities. Based on the derived formulas, this study derives the cost function for determining the optimal numbers of rows, bays, tiers of stacks under the condition that the requirement for storage space is satisfied. Numerical examples were given.

• 한국기계연구소 소보
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• 통권20호
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• pp.33-39
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• 1990

In the existing robot programming methods, off-line method because important role of programming because of improvement of hardware and softeare of PC. The purpose of this study is to develop practical robot programming system for polishing task using PC. In the first place, we have investigated the existing robot programming systems, and derived the requirement of this programming system from the existing systems. And we have decied the structure of this system. After that, we have developed this system. Using Windows software, this programming system has man/machine interface function. Therefore users can use easily and quickly.

• 한국군사과학기술학회지
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• 제7권1호
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• pp.13-23
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• 2004

There are several kinds of error factors in control system design. All error factors must be analysed before designing the control system. Therefore, each error factor must be compensated and eliminated completely. Systems Engineering can solve these error factors. In this paper, systems engineering approach on control system design are studied under model based systems engineering with RDD-100, Matlab-Simulink. Systems Engineering shall be used in defense development from control system design to system development.

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2004년도 춘계학술발표대회논문집
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• pp.778-781
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• 2004

최근 수년간 e-learning 분야에서는 서로 다른 플랫폼에서도 컨텐츠가 공유될 수 있도록 하기 위해 SCORM이라는 표준안 작업이 한창 이루어져 왔다. 또한 이 표준안을 따르는 컨텐츠 저작 도구들이 개발 되고 있다. 따라서 본 논문에서는 이런 SCORM 표준안을 따르는 컨텐츠 저작 도구들의 기능을 비교 분석하기 위한 기준을 제시하였고 이를 바탕으로 여러 컨텐츠 저작 도구들을 비교 및 평가해 보았다.

• 한국콘텐츠학회논문지
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• 제11권1호
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• pp.202-215
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• 2011

디자인을 수행하는데 있어서 디자인의 형태, 기능, 양식에 관한 폭 넓은 이해는 매우 중요하다. 왜냐하면 형태와 기능을 배제한 디자인은 존재할 수 없고 또한 모든 디자인은 서로 다른 양식에 의해 구체화되기 때문이다. 이러한 관점에서 본 논문은 디자인의 형태, 기능, 양식과 그 관계에 대하여 고찰하였다. 우선 1-서론에서는 연구논제의 배경을 설명하고 목적과 필요성에 대한 문제를 제기하였다. 이를 토대로 2-디자인 형태에서는 원초적 형태, 가공적 형태, 규범적 형태, 표현적 형태에 대하여 살펴보았고, 3-디자인 기능에서는 본래적 기능, 전승적 기능, 절대적 기능, 상대적 기능에 대하여 살펴보았으며, 4-디자인 양식에서는 생존 양식, 민속양식, 단순양식, 복합양식에 대하여 살펴보았다. 끝으로 5-결론에서는 형태, 기능, 양식에 대한 접근방법을 피력하고 그 관계를 정립하였다.

• 한국압력기기공학회 논문집
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• 제8권2호
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• pp.26-32
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• 2012

The systems of the nuclear power plant are designed based on the User Requirement Document, and Korea Hydro & Nuclear Power Co. (KHNP) implements preventive maintenance activities to keep the specific design function of the system consistently. To monitor the preventive maintenance effectiveness, KHNP has also developed maintenance effectiveness monitoring (MR) program based on NUMARC 93-01 since 2003, and has implemented the program in all operating plants. Recently, KHNP has upgraded MR programs by reflecting implementing experiences ; reestablishing the performance monitoring level, improving analysis for standby function and performance criteria for passive components, reestablishing the availability performance criteria and the performance criteria for the same type of components. These upgraded MR programs will contribute to enhance safety and improve equipment reliability through monitoring maintenance effectiveness.