• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2006년도 추계학술대회
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• pp.589-598
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• 2006

The rectilinear Steiner tree problem is to find a minimum-length rectilinear interconnection of a set of terminals in the plane. It is well known that the solution to this problem will be the minimal spanning tree (MST) on some set Steiner points. A hybrid evolutionary algorithm is introduced based upon the Prim algorithm. The Prim algorithm for the fitness evaluation requires heavy calculation time. The fitness value of parents is inherited to their child and the fitness value of child is estimated by the inherited structure of tree. We introduce four alternative evolutionary algorithms, Experiment result shows that the calculation time is reduced to 25% without loosing the solution quality by using the fitness estimation.

• 소성∙가공
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• 제15권9호
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• pp.679-685
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• 2006

New method for evaluation of heat transfer coefficient is proposed. In general, many researchers have been studied about inverse problem in order to calculate the heat transfer coefficient on three-dimensional heat conduction problem. But they can get the time-dependent heat transfer coefficient only through inverse problem. In order to acquire temperature-dependent heat transfer coefficient, it requires much time for numerous repetitive calculation and inconvenient manual modification. In order to solve these problems, we are using the SQP(Sequential Quadratic Programming) as an optimization algorithm. When the temperature history is given by experiment, the optimization algorithm can evaluate the temperature-dependent heat transfer coefficient with automatic repetitive calculation until difference between calculated temperature history and experimental ones is minimized. Finally, temperature-dependent heat transfer coefficient evaluated by developed program can used on various heat transfer problem.

• 대한산업공학회지
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• 제40권4호
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• pp.428-434
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• 2014

Dry docks are used to repair warships or Merchant ships based on their life cycles. There are the certain number of dry docks in the ROK Navy, However, the ROK Navy force structure has been changing a lot since the Korean War. The focus of this study is to analyze the queueing problem regarding present dry docks capacities and to forecast the appropriate number of dry docks based on future naval ship structure. The study proposes to obtain an efficient dry dock size using queueing problem and simulation.

• 창의정보문화연구
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• 제5권2호
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• pp.165-171
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• 2019

소프트웨어 교육의 관심이 커짐에 따라 교육부에서 필수로 초등 5~6학년 실과에 소프트웨어 교육을 진행하도록 하였다. 이 연구에서는 학습자 중심 평가를 소프트웨어 교육에 적용하여 그 효과성을 분석하였다. 이를 통해 많은 교사가 학교 현장에서 소프트웨어 교육에 학습자 중심 평가를 적용하여 좀 더 효과적인 소프트웨어 교육이 되었으면 한다. 학습자 중심 평가에서는 학생들이 능동적으로 수업에 참여하고 적극적인 학습 활동을 함으로써 긍정적인 효과를 기대할 수 있다. 학습자 중심 평가를 통해 여러 배경 변수를 고려하여 학생들의 3가지 측면, 창의력, 문제해결력, 정보 활용 능력이 어떻게 변화하는지 확인하고, 소프트웨어 교육에서 학습자 중심 평가가 이 능력들에 어떠한 영향을 미치는지 확인하였다. 연구 결과, 소프트웨어 교육에서 학습자 중심 평가가 창의력, 문제해결력, 정보 활용 능력에 모두 유의미한 효과가 있었고 엔트리/스크래치 공부 경험의 유무 또한 이에 영향을 주었다는 것을 확인할 수 있었다.

• 품질경영학회지
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• 제41권3호
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• pp.475-486
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• 2013

Purpose: In this study, we propose the evaluation criteria and method for selecting intensive management items which, in order to improve the parts management.1) Methods: Parts management such as MIL-STD-3018, SD-19, SD-22 is used for devising the proposed evaluation criteria and method of selecting intensive management items. Especially, proposed evaluation criteria is customized by using AHP method. Results: We approved the importance of evaluation criteria for selecting intensive management items using AHP method. In production step, the parts problem record, the parts reliability, the supplier reliability, DMSM S1). In development step, the parts problem record, a counterfeit, the parts reliability, MTTF2). Conclusion: The evaluation criteria and method for selecting intensive management items which is applicable to the domestic weapon acquisition environment is proposed.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.576-579
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• 2007

급격한 경제성장과 함께 도시의 인구 집중으로 주택 문제의 해결을 위해 대규모 아파트 단지가 들어섰고 현재도 그 수가 계속 증가하고 있다. 반면 경년이 오래 된 아파트의 경우 노후화로 인한 문제 해결을 위한 수단으로 정부차원에서 리모델링을 유도하는 정책에 의해 리모델링에 대한 관심이 높아지고 있으나 그에 따른 기술적 제도적 뒷받침이 부족한 형편이다. 리모델링의 성과를 객관적으로 평가할 수 있도록 리모델링의 특성과 사회적, 문화적 요구를 수용할 수 있는 리모델링 성능평가에 관한 연구가 필요하다. 본 논문에서는 국내 주택성능평가표시 제도와 일본의 기존주택 성능평가 항목을 비교하여 리모델링 공동주택의 성능평가를 적용하기 위한 방안에 대하여 연구하였다.

• 한국항만학회지
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• 제7권1호
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• pp.5-12
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• 1993

In complex decision making such as ill-defined system, one of the main problem is how to treat ambiguous aspect of the decision making. According to the complexity and ambiguity of the objective systems, many types of evaluation attributes are necessary for the rational decision and the relationship among the attributes become complex and fuzzy. Fuzzy integral is very effective to evalute the complex system with interaction between attributes but how to save the evaluation efforts in the decision making process of grading the membership of the objects or alternative is the problem to be tackled. Because the more object there are to evaluate, the number of decisions to made increase exponentially. Therefore, this paper aimes to propose a new evaluation algorithm based on fuzzy integral which can save the evaluator's efforts in decision making process. The proposed algorithm is constructed as follows : First, compose the fuzzy measure by introducing AHP(Analytical Hierachy Process) & mutual interaction coefficient. Second, generate fuzzy measure value of monotone family set for calculating the fuzzy integral. The effectiveness of the proposed algorithm is investigated through the example and sensitivity of interaction coefficient is illustrated.

• STI Policy Review
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• 제7권1호
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• pp.1-16
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• 2016

Technology supply has been the main thrust of the Korean government's science & technology policy, focusing on the development and acquisition of new technology in line with the catching-up strategy of economic growth and industrial development. However, new social or societal problems have become major government policy issues, heralding new innovation policy aimed to address them. Such new policy initiatives for social problem-solving present a niche where the existing system of government innovation policy process is challenged, including such processes as goal-setting, planning, implementation, project management, and evaluation. The rigidity of the existing institution of government innovation policy, however, still shapes the content and progression of innovation policy for social problem-solving. This study reviews Korean innovation policy for social problem-solving as a policy niche, and aims to clarify its challenges and opportunities. It uses a system transition framework to explain the emergence and evolution of the innovation policy niche in Korea. The main research question is to what extent and in what aspect the existing innovation policy regime shaped innovation policy for social problem-solving. The study examines the inertia of the current paradigm of innovation policies and R&D programs, and sheds light on the search for a distinctive identity for innovation policies that tackles social problems.

• 복식문화연구
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• 제29권3호
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• pp.346-360
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• 2021

Universities have recently introduced problem-based learning (PBL) to various subjects to enhance problem-solving skills (including self-directed learning and small-group learning) required in industry. The PBL module was applied to the personal production process in a draping class. A study was based on a questionnaire after conducting two PBL modules with a group of students. Each PBL module included 'design analysis', 'presentation of flat sketch and draping plan', 'discussion of the plan', 'evaluation of the draping result and correcting the problem', and 'final evaluation of the completed project'. Results showed that satisfaction with the PBL method and its activities was higher than satisfaction with existing teaching methods. In particular, among the various components, the 'design analysis' and 'the presentation step of flat sketch and draping plan' stages were more helpful to students compared to small-group discussion. Moreover, the effects of PBL were observed through student reflection essays, in which students suggested that PBL was very effective in enhancing problem-solving through self-directed and small-group learning. Despite the overall satisfaction with PBL, students expressed some minor difficulties associated with awkwardness with a novel learning method, lack of diverse perspectives among each group, and poor communication skills. Therefore, the study shows that PBL is highly likely to be useful to students when they are solving pattern drafting problems and making samples through self-directed learning and small-group learning.

• 한국정보시스템학회지:정보시스템연구
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• 제13권2호
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• pp.225-240
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• 2004

The most critical problem of MIS evaluation is the lack of the systematic framework to cover various factors and viewpoints. To solve this problem, this study takes the multi-level and contingent approach to performance evaluation, composed of three levels: evaluating the contribution of MIS to an organization [strategy level]; evaluating the activities of MIS department or MIS function as an organizational sub-function through the overall MIS lifecycle [function level]; and evaluating the quality or productivity of the application systems as MIS outputs [system level]. Ideal MIS evaluation should include all three levels of the hierarchy with balanced importance. However, MIS evaluationcanbedividedintothreetypes,suchasstrategy-oriented, function-oriented and system-oriented evaluation, depending on the focus and emphasis of evaluation. The usage pattern of each evaluation type is analyzed according to contingent variables of MIS evaluation such as MIS maturity, information intensity and firm size, and top management's intent. It is also found that the firms of higher MIS maturity and top management's intent use the strategy-oriented evaluation type, and the firms with strategy-oriented evaluation type show a higher MIS performance. Further, MIS maturity and top management's intent show contingent effects between evaluation type and MIS performance. Some managerial implications can be drawn based on the results of the study. First, strategy-oriented evaluation of MIS is more important as many firms more often use information technology as a strategic weapon. Second, MIS performance varies with evaluation type. Therefore, the design of MIS evaluation framework should be done carefully in the strategic and managerial contexts. Third, firms are recommend to use a different evaluation type according to organizational characteristics such as MIS maturity and information intensity.