• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.1026-1029
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• 2002

Outlet of gas has been a big problem in deforming rubber or plastic in pressing mold. Air vent has been used to solve the problem, but it has weak points such as the increased cost, the increased number of process, and vent marks on the surface of a produce. In this study, the sintering method is used for making porous metal mold. Porous metal mold has many open pores, which are very small. When Porous metal mold is used for pressing mold, all process would be made short, produce cost would be down, and it would not leave vent marks on the surface of a produce. Porosity varies from sintering and pressing conditions, which are the pressure of compacting powder, the length of sintering time, sintering temperature and sintering atmosphere etc. This study will find optimized sintering temperature condition for the Porous metal mold.

• 한국정밀공학회지
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• 제16권12호
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• pp.24-30
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• 1999

In the automobile development, press tool design and manufacturing are very difficult and need high cost experienced workers. Therefore, we concerned ourselves in the cost down and easy manufacturing. In this research, we have developed a tool for LH/RH of the front fender, which had difficulty in forming. We have carried out the drawing analysis by Pam-stamp and CATIA modeling. Finally, we get the optimal design parameter. As a result of try out, we found out the optimal width and margin at the center line for tool design. Also, in order to get good results we have to intaglio margin in the part of the wheel house and utilize double bead on every side except corner.

• 한국정밀공학회지
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• 제20권1호
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• pp.91-98
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• 2003

Removal of gas in a mold has been a big problem in pressing mold or in injection mold. Air vent has been used to solve the problem, but it has weak points such as the increased cost, the increased number of process, and vent marks on the surface of a product. In this study, the sintering method and rapid tooling method are used for making porous metal mold. Porous metal mold has many open pores, which are very small. When porous metal mold is used for pressing mold or injection mold, all process would be made short, produce cost would be down, and vent marks would be not leaved on the surface of a product. Characteristic of porous material varies from sintering conditions, which are the length of sintering time, sintering temperature and sintering atmosphere etc. This study will find optimized sintering condition for the porous metal mold.

• 전력전자학회논문지
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• 제4권1호
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• pp.105-110
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• 1999

이 논문은 역률제어회로를 갖는 인버터 구동 에어컨에 관해 설명한다. 정류기에 역률제어회로를 적용함에 의해서 전원선으로의 고조파 삽입을 줄일 수 있고, 효율을 향상시킬 수 있으며, 기존의 인버터와 비교해서 전체 시스템 가격을 낮출 수 있다. 또한, 역률제어회로의 출력전압을 안정화함에 의해서 시스템 성능을 향상시킨다. 본 논문에서는 역률제어회로의 자세한 설계절차를 제시하고, 역률제어회로의 여러 가지 장점을 시뮬레이션과 실험을 통해서 확인하였다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2003년도 추계학술대회 및 정기총회
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• pp.246-251
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• 2003

공급체인관리는 개별적 기업 에이전트(마케팅, 자재, 구매, 생산, 유통등)를 통합하여 운용하도록 하는데, 이러한 통합은 한 기업에서 국한되는 것이 아니라 공급자로부터 소비자까지의 공급체인의 모든 에이전트에게 적용된다. 공급체인의 에이전트들 간의 통합이 실질적으로 효과를 나타내기 위해서는 상호 정보 공유 및 조정된 방법으로 운영되어야 한다. 전자거래에 대한 요구가 증대되면서 새로운 변화에 유연하게 대처하고 예측하지 못했던 상황, 즉 Order에 대한 주문량 변경/취소, 새로운 고객 등장(긴급을 요구하는 Project등)으로 새로운 Order 생성, 계절적 요인으로 인한 주문량 폭주, Event에 의한 특정 상품에 대한 Cost Down 및 Cost 복원, 원자재/제품의 불량처리에 대한 Delivery 일정 수정 등과 같은 사건에 능동적으로 대처할 수 있도록 공급체인 내에서 Intelligent 기능을 가진 Coordination Agent의 도입이 요구되고 있다. 따라서 본 연구에서는 전자거래와 공급체인을 연계한 e-SCM에서의 조정 에이전트 시스템을 구현하고 Agent의 Coordination 능력을 분석한다.

• 한국멀티미디어학회논문지
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• 제19권6호
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• pp.1052-1064
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• 2016

For effective management and processing for civil affairs, online public services are in operation in every administrative organizations. However, due to the lack of links in each government departmental business processes on e-Government system, the satisfaction of the civil petitioners has not improved. In this paper, we propose an improved business process for the implementation of one-stop integrated civil affairs and suggestions services on e-Government system to reduce the time and cost for processing civil affairs and to improve the efficiency of the public services by cutting down the cost and time. This paper also suggests the ways to improve the quality of public service through redesigning civil affairs processing in the light of integrated system for the civil affairs and its suggestion.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2011년도 제37회 추계학술대회논문집
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• pp.511-514
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• 2011

본 논문은 탄소 섬유의 응용 분야 중에서 주로 항공우주 분야를 중심으로 조사하였다. 탄소 섬유의 좋은 물성에도 불구하고 초기에는 기술적 경제적인 요인으로 항공기 등에는 그다지 많이 사용되지 않았다. 그러나 기술의 향상으로 물성의 향상과 가격 저하로 모든 분야로 탄소 섬유의 적용은 늘어가고 있다.

• International Journal of Safety
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• 제11권2호
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• pp.1-4
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• 2012

The falling accidents have increased in the structure and heavy industries. Therefore, a various falling prevention systems with safety block and lanyard have been supplied in order to prevent falling accidents and acquire the long life and cost down for the maintenance. However, there are not the reliable and domestic the falling prevention system until now. Almost systems were imported from U.S.A, Japan, U.K and Germany. The structural safety of the imported safety block is satisfied sufficiently, but it has heavy weight due to the cover with the aluminum and thickness. So, many workers are not feeling themselves. Thus, the aim of this work is to develop a commercial safety block that has a light weight and strength. And the cost efficiency of the system and safety for workers also will be improved remarkably.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1763-1766
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• 2007

Three technical obstacles must be overcome to build a fruitful business in the nascent industry of flexible microelectronics: the self-heating effect of thin film transistors (TFTs), the thermal and mechanical durability of flexible devices, and the cost issue. The self-heating effect is controlled through TFT shape, TFT electrical performance, dimensional reduction and energy-efficient circuits. Plastic engineering is one of the keys to solving thermal and mechanical durability problems faced by flexible microelectronics devices. For the Suftla flexible microelectronics business to be viable, Suftla transfer yield must be sufficiently high to keep down device cost. Improving the transfer yield is not easy, but it is the same challenge already faced and cleared in the TFT liquid crystal display industry.

• 반도체디스플레이기술학회지
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• 제2권3호
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• pp.13-18
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• 2003

A remote monitoring system of the semiconductor equipment is used to monitor or control operations of the equipment. Most of the conventional monitoring systems are based on the client-server model with the general purpose PC. Basically, it implies the difficulties in the system reliability and cost down due to its size and complexity. To overcome these difficulties, we suggest an embedded web server which is based on the low-cost microprocessor. It is designed for the monitoring or controlling a dedicated equipment only. To evaluate the feasibility of the suggested embedded web server, we have implemented a test-board with ATMega103 and programmed the basic modules using the AVR-GCC. Finally, we have tested its operations on the MS Explorer 6.0 environment.