• 한국경영과학회지
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• 제20권1호
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• pp.131-145
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• 1995

This paper presents a method for solving project planning problem which the opinions of experts greatly disagree in each activity processing time. Triangular fuzzy numbers (TFNs) are used to represent activity times of experts. And we introduce a pessimistic project planning with major TFNs and an optimistic project planning with minor. TFNs, and illustrate the approach using a combination of the existing composite and the comparison methods, which is used to solve the complex project planning problem.

• 경영과학
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• 제19권2호
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• pp.91-124
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• 2002

The use of network planning models and tools is essential for effective KII (Korea Information Infrastructure) planning and analysis in that it will significantly reduce the risk and uncertainty embeded in the development and the provision of future broadband services. The purpose of this study is to develop a theoretical framework and a computer tool for modeling the various aspects of the KII topology and architecture and evaluating the techno-economic feasibility of the KII implementation strategy.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 춘계학술대회
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• pp.239-245
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• 2008

In this study has investigated and considered product planning methods at the existing product design process and being used the safety evaluation methods at the product planning stage, and has deduced the 16 safety evaluation elements to have to be considered for executing the safety evaluation at the product planning stage. When the safety evaluation is executed from the product planning stage, more safe products will be designed.

• 대한안전경영과학회지
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• 제6권1호
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• pp.135-146
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• 2004

This paper first addresses a distribution planning method on centrally controlled supply chain. The distribution channels are assumed to be network of arborescence form. For such distribution networks, this study proposes a distribution planning scheme when the demands for retail sites are provided for a given planning horizon. As the planning horizon rolls forward, for a new horizon, forecasted demand distributions of periods in the horizon are updated. An idea of controlling customer service level by the selection of demand to be used in the planning (Demand Used in Planning, DUP) from the forecasted values is also discussed.

• Journal of information and communication convergence engineering
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• 제11권4호
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• pp.274-281
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• 2013

In this study, we consider the challenges in motion planning for automated driving systems. Most of the existing online motion-planning algorithms, which take dynamics into account, find it difficult to operate in an environment with narrow passages. Some of the existing algorithms overcome this by offline preprocessing if environment is known. In this work an online algorithm for motion planning with dynamics in an unknown cluttered environment with narrow passages is presented. It utilizes an idea of hybrid planning with sampling- and discretization-based motion planners, which run simultaneously in a full configuration space and a derived reduced space. The proposed algorithm has been implemented and tested with a real autonomous vehicle. It provides significant improvements in computational time performance over basic planning algorithms and allows the generation of smoother paths than those generated by the recently developed hybrid motion planners.

• 한국과학교육학회지
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• 제34권2호
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• pp.187-195
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• 2014

이 연구에서는 중등 예비과학교사의 수업 계획의 특징과 이에 영향을 미친 요인을 조사하였다. 서울 소재 사범대학에 재학 중인 13명의 예비과학교사가 연구에 참여하였다. 예비교사들이 작성한 교수학습 지도안과 활동지 등의 교수학습 자료, 수업 계획 일지를 수집하였으며, 수업 계획의 요소별로 예비교사들의 수업 계획에 대한 심층적인 정보를 얻기 위해 반구조화된 면담을 실시하였다. 연구 결과, 대부분의 예비교사들은 차시 계획에만 초점을 맞추어 교육과정을 체계적으로 고려하지 않았다. 수업 목표는 수업 계획에서 부차적인 요소로 간주되었으며, 주로 인지적 측면에만 초점을 맞추어 기술되었다. 교수학습 전략을 구체화하는 것은 수업 계획의 출발점이 되었는데, 예비교사들은 자신의 중등학교에서의 학습 경험을 반성적으로 평가하는 과정을 통해 예비교사 교육과정에서 학습한 구성주의적 교수학습 이론을 수용하여 수업 계획에 활용하였다. 교수학습 활동으로 실험 활동을 계획한 경우에는 교과서에 수록된 실험 활동을 그대로 사용하는 경향이 높았으나, 실험 외의 활동은 자신의 개인적 경험에 의존하여 계획하는 것으로 나타났다. 또한, 예비교사들은 교수학습 평가를 수업 계획의 요소로 인식하지 못하여 이를 계획하지 않는 경우가 많았다. 이러한 결과를 바탕으로 중등 예비과학교사 교육에서 수업 계획에 대한 구체적인 교육 방안을 제안하였다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2001년도 추계학술대회 논문집
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• pp.290-293
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• 2001

The mid-schedule planning of the ship is making a schedule about the process from cutting to erection. The ship consists of lots of blocks. This block has different process because of the shape of the block varies in accordance with the ship-type and the part position of the ship. The type and order of each block process initially must be generated for the mid-schedule planning. In this paper, the process planning, described as above is preparing the basic information before scheduler make a plan with the prepared manhour. The scheduling is done with this process planning which includes the information of the process order. This paper shows the research about three methods to design the process planning. First, investigate the expression method about information of the process planning for the mid-schedule planning in real workplace. Second, design the object of the process planning on the basis of investigating the expression method. Finally, develop the prototype of object on the basis of this designed process planning and then find the practical use in the mid-schedule planning. The object, which is developed in this paper, contains the main algorithm. In case of developing The Mid-Schedule Planning System, this object is expected to be utilized very easily as consisting another object.

• Nuclear Engineering and Technology
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• 제53권11호
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• pp.3505-3516
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• 2021

During nuclear facility decommissioning, workers are continuously exposed to high-level radiation. Hence, adequate path planning is critical to protect workers from unnecessary radiation exposure. This work discusses recent development in radioactive path planning and the algorithms recommended for the task. Specifically, we review the conventional methods for nuclear decommissioning path planning, analyze the techniques utilized in developing algorithms, and enumerate the decision factors that should be considered to optimize path planning algorithms. As a major contribution, we present the quantitative performance comparison of different algorithms utilized in solving path planning problems in nuclear decommissioning and highlight their merits and drawbacks. Also, we discuss techniques and critical consideration necessary for efficient application of robots and robotic path planning algorithms in nuclear facility decommissioning. Moreover, we analyze the influence of obstacles and the environmental/radioactive source dynamics on algorithms' efficiency. Finally, we recommend future research focus and highlight critical improvements required for the existing approaches towards a safer and cost-effective nuclear-decommissioning project.

• 대한방사선기술학회지:방사선기술과학
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• 제45권5호
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• pp.439-448
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• 2022

The purpose of this study was to analyze the results from statistical process control (SPC) to recommend upper and lower control limits for planning parameters based on delivery quality assurance (DQA) results and establish our institutional guidelines regarding planning parameters for helical tomotherapy (HT). A total of 53 brain, 41 head and neck (H & N), and 51 pelvis cases who had passing or failing DQA measurements were selected. The absolute point dose difference (DD) and the global gamma passing rate (GPR) for all patients were analyzed. Control charts were used to evaluate upper and lower control limits (UCL and LCL) for all assessed treatment planning parameters. Treatment planning parameters were analyzed to provide its range for DQA pass cases. We confirmed that the probability of DQA failure was higher when the proportion of leaf open time (LOT) below 100 ms was greater than 30%. LOT and gantry period (GP) were significant predictor for DQA failure using the SPC method. We investigated the availability of the SPC statistic method to establish the local planning guideline based on DQA results for HT system. The guideline of each planning parameter in HT may assist in the prediction of DQA failure using the SPC statistic method in the future.

• 과학기술학연구
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• 제13권2호
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• pp.111-136
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• 2013

과학기술혁신을 통해 사회문제 해결을 지향하는 혁신정책이 부상하고 있다. 이 정책은 기술적 측면과 사회적 측면을 통합적으로 고려할 것을 요구하고 있다. 본 연구는 사회문제 해결형 혁신을 위한 '사회-기술기획'이라는 새로운 활동의 필요를 제시하고 그것의 특성과 발전방향을 제시하였다. 이를 위해 본 연구는 국내외에서 이루어지고 있는 사회-기술기획 활동 사례를 살펴보고 그 성격과 유형을 정리하였다. 그리고 이를 기반으로 사회-기술기획 활동의 발전 방향을 제시했다.