• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 C
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• pp.1000-1002
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• 1998

We present an approach to parallelizing optimal power flow (OPF) that is suitable for distributed implementation and is applicable to very large interconnected power systems. The objective of this paper is to find a set of control parameters with which the Auxiliary Problem Principle (Algorithm - APP) can be best implemented in solving optimal power flow (OPF) Problems. We employed several IEEE Reliability Test Systems to demonstrate the alternative parameter sets.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2001년도 춘계학술대회 학술발표 논문집
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• pp.69-72
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• 2001

In this paper, we propose a new design method for bidirectional associative memories model with high error correction ratio. We extend the conventional GBAM model using bias terms and formulate a design procedure in the form of a constrained optimization problem. The constrained optimization problem is then transformed into a GEVP(generalized eigenvalue problem), which can be efficiently solved by recently developed interior point methods. The effectiveness of the proposed approach is illustrated by a example.

• 경영과학
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• 제15권1호
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• pp.1-12
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• 1998

This paper discusses a new algorithm, the PAPANET (Pivot And Probe Algorithm for NETwork optimization), for solving linear, capacitated linear network flow problem (NPs), PAPANET is a variation and specialization of the Pivot And Probe Algorithm (PAPA) developed by Sethi and Thompson, published in 1983-1984. PAPANET first solves an initial relaxed NP (RNP) with all the nodes from the original problem and a limited set of arcs (possibly all the artificial and slack arcs). From the arcs not considered in the current relaxation, we PROBE to identify candidate arcs that violate the current solution's dual constraints maximally. Candidate arcs are added to the RNP, and this new RNP is solved to optimality. This candidate pricing procedure and pivoting continue until all the candidate arcs price unfavorably and all of the dual constraints corresponding to the other, so-called noncandidate arcs, are satisfied. The implementation of PAPANET requires significantly fewer arcs and less solution CPU time than is required by the standard network simplex method implementation upon which it is based. Computational tests on randomly generated NPs indicate that our PAPANET implementation requires up to 40-50% fewer pivots and 30-40% less solution CPU time than is required by the comparable standard network simplex implementation from which it is derived.

• 품질경영학회지
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• 제38권2호
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• pp.236-247
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• 2010

This study was preformed to analyze the effect of ISO 26000(Global Standard on Social Responsibility(SR)) establishment and implementation on Korean Industries, and to take proper responsive measures as the results. ISO 26000 Global Standard was begun to prepare the establishment from 2003, and now being ended to be implemented as the effective SR Global Standard. If the ISO 26000 is published, almost countries must prepare the suitable process to implement its contents. But, many organizations involving the government and the enterprises in Korea have not the complete informations and knowledges about the ISO 26000 Global Standard and the implementation processes. This is serious problem. So, this study was aimed and performed to cope with this problem. In this study, the effect analysis of the establishment ISO 26000 Global Standard on Korean Economy and the industries will be performed, and the effective measures to prepare for its implementation will be taken. Especially the measures of the individual company to this situation will be discussed.

• Journal of applied mathematics & informatics
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• 제5권3호
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• pp.701-716
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• 1998

In this paper we develop algorithms in programming lan-guage SCHEME for implementation of the main first order gradient techniques for unconstrained optimization. Implementation of the de-scent techniques which use non-optimal descent steps as well as imple-mentation of the optimal descent techniques are described. Also we investigate implementation of the global problem called optimization along a line. Developed programs are effective and simpler with re-spect to the corresponding in the procedural programming languages. Several numerical examples are reported.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 추계종합학술대회 논문집
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• pp.220-223
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• 1999

Conventional double DES has been not only shown to have a vulnerable drawback to attack method called 'Meet-in-the-Middle', but also to be hard to use that it is because software implementation has a number of problem in real time processing. This paper describes the design and implementation of modified Isolated double DES algorithm using VHDL for resolving the above problems. In this approach, we also discuss an efficient method for increasing cipher strength through expansion of key length.

• 한국조리학회지
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• 제10권1호
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• pp.167-185
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• 2004

An implementation of 6 sigma in foodservice management was introduced from 2000. However they could not achieve full advantages of 6 sigma management because of short period of implementation time, and the critical problem is employees' complaints and their oppositions. The purpose of this study is to analyze the relationship of 6 sigma and organizational commitment in the foodservice industry. In this study, we found that organizational commitment improve with the implementation of 6 sigma. 6 sigma's essential factors have influenced on the organizational commitment.

• 한국유기농업학회지
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• 제25권3호
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• pp.643-651
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• 2017

본 연구는 HACCP 제도를 적용하고 있는 소규모, 중규모, 대규모 양돈농장의 HACCP 제도 도입 목적, 효과, 그리고 문제점 등을 비교분석하기 위한 목적으로 실시하였다. 소규모와 중규모 양돈농장은 HACCP 도입 목적의 1순위를 정부의 예산을 지원받기 위함이라고 하였으나 대규모 농장은 농장의 경쟁력 향상이라고 답하였다. HACCP 적용 효과는 소규모 농장의 경우 체계적인 농장관리를 1순위로 응답하였으나 중규모와 대규모 농장은 농장의 위생관리 수준 향상이라고 답하였다. 아울러 HACCP 적용에 따라 발생되는 가장 큰 문제점으로는 직원의 의식향상의 어려움(소규모 농장)과 HACCP 도입에 따른 기록관리(중규모, 대규모 농장)인 것으로 조사되었다. 이러한 문제점을 개선하기 위해서는 양돈농장 HACCP 평가항목 수의 조정과 종업원을 대상으로 HACCP 교육을 실시할 필요성이 있을 것으로 판단된다.

• 디지털산업정보학회논문지
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• 제10권1호
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• pp.99-104
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• 2014

Nowadays, various researches fulfill in many communication engineering area for B4G (Beyond Forth Generation). Next LTE-A (Long Term Evolution Advanced), MU-MIMO (Multi-User Multi Input Multi Output) method raises to upgrade throughput performance. However, the method of user selection is not decided because of many types and discussions in MU-MIMO system. Many existing methods are powerful for enhancing performance but have various restrictions in practical implementation. Fairness problem is primary restriction in this area. Existing papers emphasis algorithm to increase sum-rate but we introduce an algorithm about dealing with fairness problem for real commercialization implementation. Therefore, this paper introduces new user selection method in MU-MIMO system. This method overcomes a fairness problem in SUS (Semiorthogonal User Selection) algorithm. We can use the method to get a similar sum-rate with SUS and a high fairness performance. And this paper uses a hybrid method with SC-SUS (Superposition Coding SUS) algorithm and SUS algorithm. We find a threshold value of optimal performance by experimental method. We show this performance by computer simulation with MATLAB and analysis that results. And we compare the results with another paper's that different way to solve fairness problem.

• 한국항공운항학회:학술대회논문집
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• 한국항공운항학회 2005년도 추계학술발표대회 논문집
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• pp.45-49
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• 2005