최근프린팅기술은 전자부품소재 산업의 대형화 및 저가격화의 해법으로 기대되고 있다. 특히 전자부품소재 프린팅 기술 중 잉크젯공정은 최신 디스플레이용 전극소재, PCB, FPCB 및 기타 소재공정에 이용하려는 움직임이 활발히 진행되고 있다. 그러나 잉크젯 기술은 재료의존도 비중이 높은 기술로서 소재(금속잉크)의 개발이 최우선시 되어야한다. 전자부품소재용 금속잉크에 사용되는 금속 나노입자는 우수한 전기전도성과 산업적응용이 가능해야 한다. 따라서 최근 연구되고

  Government-driven informatization support projects for small and medium companies turn into collaborative information technology alliances between mother companies and their suppliers. These collaboration efforts are driven by a mother company that can

The authors used association rules and patterns in sequential of data mining in order to raise the efficiency of engineering changes. The association rule can reduce the number of engineering changes since it can estimate the parts to be changed. The patterns in sequential can perform engineering changes effectively by estimating the parts to be changed from sequence estimation. According to this result, unnecessary engineering changes are eliminated and the number of engineering changes decrease. This method can be used for improving design quality and productivity in company managing engineering changes and related information.

본 연구는 유비쿼터스 환경에 적합한 시나리오를 기반으로 한 인텔리전트 의류의 어플리케이션을 개발하고 이를 실제 작동되는 디자인 및 구현을 목적으로 하였다. 스키장 응급구조 대원용 도우미 기능을 갖춘 인텔리전트 의류인 '패트롤 재킷'의 응용 시나리오를 개발하고, 이에 적합한 디자인을 선정하고 이를 실제로 구동 가능하도록 제작하였다. 이를 위하여, 전자/이미지 태그 기술 중 하나인 칼라 코드를 응용한 애플리케이션을 도출하고 이를 기반으로 컨셉 디자인과 실물 모델을 개발한 후 평가 및 수정 단계를 거쳐 최종 디자인 모형을 완성하였다. 이러한 일련의 과정을 거쳐 일상적인 외관의 인텔리전트 의류인 '패트롤 재킷'의 디자인 모형을 개발하였다.

The paper presents some results regarding the obtaining of some copper heat pipes with a porous copper internal layer for electronic components cooling. The heat pipes were realized by sintering of spherical copper powders of size directly on the internal side of a copper pipe of 18 mm in diameter. The obtained pipes were then brazed in order to obtain a heat pipe of 0.5 m in length. After that, the heat pipe was sealed and filled with a small quantity of distilled water as working fluid. To establish the total heat transport coefficient and the thermal flow transferred at the evaporator, some external devices were realized to allow the heating of the evaporator and the cooling of the condenser. Water heat pipes are explored in the intermediate temperature range of 303 up to 500 K. Test data are reported for copper water heat pipe, which was tested under different orientations. The obtained results show that the water heat pipe has a good thermal transfer performance in the temperatures range between 345 and 463 K.

Objectives: The aim of this study is to determine prevalence and related factors of musculoskeletal symptoms in electronics assembly line workers. Method: A questionnaire survey was performed on 350 workers in In-chon city. The questionnaire consisted of questions on the general characteristics, work duration, working hours, hobby activity hours, housekeeping activity hours and standardized descriptions of NOISH on musculoskeletal symptoms. Result: Complaint rates of musculoskeletal symptoms by anatomical site were as follows: shoulder, 67% : neck, 40.4% : waist, 28.7% : wrist and hand, 27.1% : foot and leg, 14.4% : arm and elbow, 11.2%. Significantly higher prevalence of shoulder musculoskeletal symptom was found women than men, married than unmarried, less than 1hours housekeeping activity than over 1hours housekeeping activity. Multiple logistic regression analysis identified gender, marital status and housekeeping activity as the main affecting factors for shoulder musculoskeletal symptoms. Conclusions: The most prevalence of musculoskeletal symptoms was shoulder site. It was higher in married women and over 1hours housekeeping activity in a day. It is recommended that married women should be reduce housekeeping activity time.

With the introduction of the Internet in the 21st century, the manufacturing-oriented industry, so called EMS(Electronic Manufacturing Service) specialized in manufacturing only, is rapidly expanding. From the beginning of the year 2000, the EMS industry in advanced countries around the world, whereas a strong Motivation System in which a manufacturing related staff plays a main role, has began providing the source of competitiveness. And this industry is regarded as a core of management linking productivity directly to management performance. Thus, all the manufacturing sectors including not only the electronic industry but also mechanical industry in the future are observed to be divided into two industries; a Maker strategy industry focused on marketing and development, and a EMS industry specialized in manufacturing. Therefore, we need to evaluate whether the industries should continue to support the Manufacturers Strategy or attempt to change into the EMS industry However, with no approved evaluation standard on hand as to an actual EMS industry, in this thesis, we develop the EM(EMS-Maker) Chart in order to analyze both the Manufacturer Strategy and the EMS industries.