• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.733-735
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• 2002

반도체 CAD기술과 제조기술의 발전으로 인하여 반도체 집적도가 2001년 2002년 각각 0.35, 0.25마이크론 등으로 급속도로 증가하게 되었으며 이러한 집적토의 향상은 기대치 이상의 시스템 성능 향상을 이룩할 수가 있었다. 그러나 피할 수 없는 제조 공정의 변화와 불완전성으로 인하여 칩 크기에 제한이 따르게 되며 그 이상의 크기에서는 상용화가 불가능할 정도로 수율(Yield)이 현저하게 감소하게 된다. 기존의 대부분 연구가 반도체의 생산 공정의 관점에서 준비되어 활용되는 통계 자료에 근거한 경험의 축적이었다. 그런 연유로, 단지 반도체 생산 부분의 자료에만 치중하다보니 실지 반도체 수율에 가장 큰 영향의 요소인 랜덤 디펙트(random defect) 수율을 고려하지 못하는 치명적인 결점이 있다. 본 연구는 반도체 수율 분석과 수율을 증진시키기 위하여 설계된 도면 중 레이아웃에 해당하는 도면을 입력으로 하여, 반도체 생산 설비 즉 공정의 상태나 변수를 모델링하여 이를 수율 예측을 위한 기분 자료로 사용한다. 즉, 설계 단계에서 수율을 예측함으로써 과거 64M DRAM의 초기 단계에서의 수율과 같은 문제점을 해결할 수 있는 방안을 제시할 뿐 아니라, 비 메모리 칩의 수율을 설계단계에서 제공하는 역할을 한다.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.958-961
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• 2011

플런저(Plunger)의 부품 용도는 점화 플러그와 조립 되는 부품으로 연료 분사장치에 적용하여 연료 효율이 약 15~20% 개선됨이 일본에서 검증되어 일본은 상용화 되었다. 국내에서는 개발단계로 처음에 냉간단조로 개발하였다가 원가 및 생산성 문제로 프로그레시브금형(Progressive Die)로 개발 하려는 단계이다. 이에 본 논문에서는 디젤 차량에 장착되는 플런저를 냉간단조방식이 아닌 원가 및 생산성을 확보할 수 있는 프로그레시브 금형에 적용하여 양산할 수 있는 스트립 레이아웃을 개발한 결과를 바탕으로 금형설계 및 제작을 하고, 프레스에 장착하여 트라이얼 하였고 이를 통하여 기존 설비 대비 1/20의 금액투자로 플런저 생산원가를 확보할 수 있었다.

• Journal of Intelligence and Information Systems
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• v.14 no.3
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• pp.77-86
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• 2008

This study presents a method for estimating the productivity of the ship operation in container terminal. The productivity of the ship operation is influenced by the specifications of each piece of equipment and layouts of the terminal, and the operational strategies. The handling equipments considered in this study are QC(Quay Crane), RMGC (Rail mounted gantry crane), and Transporter (TR). The simulation experiments are conducted to estimate the QC productivity based on the change of the design factors.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.04a
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• pp.675-681
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• 2002

Parametric modeling and configuration design method are a important methods for rapid design in manufacturing. This paper proposes a relation rules which parametrically models a bonnet trimming tool based on Pro/Engineer. The concept of desogn is applied a trimming die of the bonnet outer panel. Trimming die have a many parameters. Each a parameter is related the die face and punch profile. A design system consists of a Pro/Engineer, a Pro/program.

• Journal of the Society of Naval Architects of Korea
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• v.45 no.2
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• pp.202-212
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• 2008

In recent days, global shipbuilding companies have been increasing their productivity or expanding their shipyards for a large amount of orders. Though, few researches about the shipyard layout designs have been studied. This research presents a simulation-based shipyard layout design framework to resolve the problems of the shipyard layout design. The shipyard layout design framework was developed on the basis of systems engineering method. The disciplined system engineering technique was guided by ISO/IEC 15288 during the planning phase of the shipyard layout design framework development. This framework suggests that how efficient and effective shipyard layout design could be got, that can satisfy the stakeholder of the layout. Furthermore, it is recommended that how the proposed shipyard layout should be verified and validated by digital simulation model. It is expected that the framework will contribute to not only the improvement of the existing shipyard but also the construction of the new shipyard.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.3
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• pp.363-369
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• 2003

The Web-based project is seriously not efficient area at software engineering. In order to develop a Web-based system, UI(User Interface) designers usually first design display layout and then business logic developers bring to complete the coding of the display layout source. In the case of maintenance, it goes through the same process. This kinds of Web-based software development method were proposed by the various methods same as the tag library of JSP. But there are many problems to apply them and they are low productive comparing to the C/S based software development method. WFS(Web Form System), which is suggested on this thesis, separates UI design from business logic on a Web project and offers the better environment to develop Web-based software. Eventually WFS will improve the productivity to develop Web-based software.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.8
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• pp.1205-1215
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• 2002

The purpose of this study was to develop a production line using simulation method, which could improve work allocation, labor utility and productivity. Using simulation software AIM, a simulation model of functional sports wear assembly line was developed. A functional sports wear production factory were analysed to gather data necessary for this research. Factory layouts, production facilities, work time of each unit jobs were investigated. The data obtained were used as to build a base simulation model. Then, the base simulation model was verified using the obtained data, such as daily productivity. Using simulation method, low alternative production plans were suggested, which were to enhance productivity, and work efficiency and to reduce queue length and throughput time.

• Journal of the Korea Fashion and Costume Design Association
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• v.6 no.1
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• pp.88-93
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• 2004

I The Purpose of this study is to look in to the production of high-functional clothing industry, such as item, style, layout, labor, suggest some effective solutions and alternatives for them. 23124554 For this purpose, the companies specialized in manufacturing of special high-functional clothings were sampled for a survey using interview and a questionnaire. The results of this study can be summarized as follows; It was found that since demands for high-functional apparels are low and their sewing processes are much complicated requiring expensive equipments, only a few companies are engaged in such apparels. In addition, since the quantity of order s small and material inputs are more frequently changed, the sewing processes on the production line need to be changed together with the production layouts. On the other hand, as the materials used are very special, expensive equipments should be used, for which the companies feel much burdensome financially. Accordingly, t is deemed necessary for the high-functional apparel manufactures to specialize the processes requiring specialized equipments or outsource some of them or recruit highly-skilled workers.

• Journal of the Society of Naval Architects of Korea
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• v.50 no.1
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• pp.14-24
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• 2013

The marine leisure industry in Korea has been the focus of the power of economic growth and the creation of jobs in recent years. In this regard, many studies concerning marine leisure are on-going in various fields. In this paper, developed a layout system and algorithm can resolve the factory and facility layout problem. For a layout design of leisure-boat factories, the leisure-boat production process is analyzed in order to derive standard production space elements for the layout of the factory. Based on the results, a draft design of the factory layout is carried out based on the manpower planning data, as well as the characteristics and relationships of each process data. A layout design of this paper can be verified through a factory simulation solution and we suggest the verification method using a SBD(simulation based design) methodology. The layout system takes into account the user's accessibility and extendibility, so it is web-oriented and uses RIA (rich Internet Application) technology. Furthermore, the system and layout algorithm of this paper are verified with samples data that show the efficient factory arrangement and practical application method.

• Journal of the Korean Geosynthetics Society
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• v.20 no.4
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• pp.113-124
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• 2021

Underground environmental infrastructure and energy production facilities, which are recognized as avoidable facilities such as landfills, are emerging as an important social issue due to urbanization and economic growth. In order to safely construct a large-scale plant facility in the underground space, it is necessary to increase the utilization of the limited space layout and minimize unnecessary columns. In this study, the plant modularization method(Pipe Rack Module) was reviewed to solve the problems of work constraints, assembly and demolition, process system interconnection, and maintenance that occur when plant facilities are underground. In addition, plant module analysis was performed by applying various load conditions (earthquake load, device load, earth pressure load, etc.) to improve spatial layout usability and secure structure stability. Based on the analysis results under various boundary condition, the implications regarding the minimum installation interval and module arrangement (draft) of basic modules required for the construction of an underground combined plant were derived.