• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2004년도 ISMP Pb-free solders and the PCB technologies related to Pb-free solders
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• pp.201-209
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• 2004

As the European Community's Directive on the Restriction of Hazardous Substances in Electrical and Electronic Equipment banning lead (Pb) in electronics products will take effect on July 1, 2006, most electronics manufacturers will be commencing with volume production of Pb-free components by the middle of 2004. Electrodeposited pure tin finishes on electronic components are a leading contender to replace the industry standard tin-lead. Commensurate with this shift will be a somewhat steep learning curve as manufacturers adapt a variety of equipment and processes to contend with the issues surrounding this critical, industry-wide material conversion. Since the electrodeposited finish directly influences the critical reliability characteristics of the component itself, the nature of the Pb-free component finish must be well characterized and understood. Only through a thorough examination of the attributes of the electroplated tin deposit can critical decisions be made regarding component finish reliability. This paper investigates the properties of electrodeposited tin that may have an effect on component reliability, namely, grain structure (size and shape), oxide formation, tin whisker formation, and solderability. Data will be presented from laboratory and production settings, with the objective being to enable manufacturers to draw their own conclusions regarding previously established perceptions and misconceptions about electrodeposited tin properties.

• 한국정보시스템학회지:정보시스템연구
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• 제9권1호
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• pp.61-86
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• 2000

CALS(Commerce At Light Speed) which originated in the early 1980's in the military sector is now an integral component in our global strategy to further heighten competitiveness. Through integration and streamlining of production, distribution, technical information and management, CALS will certainly lead the world out of these economically challenging times and into new global prosperity. However, not much effort have been focused on the development and diffusion issues of component technologies such as ERP/SCM(Enterprise Resourses Planning/supply Chain Management), PDM(Product Data Management), and BPR(Business Process Reengineering) related with the CALS in electronic industry. Therefore, the purpose of this study is to analyze the advancing status and to present suggestions for the development of the CALS in electronic industry. In order to achieve the purpose, the case study has been conducted using the questionaries on the end-users and the interviews on the managers in the CALS area. The case study cover 57 users of the CALS for the three outstanding electronics(L, S, and D Electronics) in Korea. The questionaries include five success measures and eleven diffusion factors for the component technologies such as ERP/SCM, PDM, and BPR. In summary, the CALS will serve as the bases for exciting corporated innovations and the common business framework which facilitates the realization of Virtual Enterprise and Electronic Commerce in the 21st century.

• 전력전자학회논문지
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• 제11권2호
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• pp.104-112
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• 2006

대용량 동기 발전 전동기 운전에는 주로 사이리스터를 이용한 정지형 주파수 변환장치(SFC static Frequency Converter)시스템이 널리 사용되고 있다. 본 논문에서는 기술적인 언급이 거의 되어있지 않은 회생 제동 시스템의 개선된 제어 알고리즘을 제시하였다. 기술적 언급이 없기 때문에 실제 구동되고 있는 양수 발전소의 실측 파형을 분석하여 알고리즘을 도출하였으며 이로 인해 기존의 회생제동 제어에서 사용되었던 전압센서가 필요 없게 되어 경제적인 절감 효과를 유발하고 또한 제어요소의 간략화로 제어의 강인성을 확보하였다. 그리고 실험을 통하여 실효성 및 타당성을 검증하였다.

• The Korean Journal of Physiology and Pharmacology
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• 제13권6호
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• pp.497-502
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• 2009

Exercise-mediated physical treatment has attracted much recent interest. In particular, swimming is a representative exercise treatment method recommended for patients experiencing muscular and cardiovascular diseases. The present study sought to design a swimming-based exercise treatment management system. A survey questionnaire was completed by participants to assess the prevalence of muscular and cardiovascular diseases among adult males and females participating in swimming programs at sport centers in metropolitan regions of country. Using the Fuzzy Analytic Hierarchy Process (AHP) technique, weighted values of indices were determined, to maximize participant clarity. A patient management system model was devised using information technology. The favorable results are evidence of the validity of this approach. Additionally, the swimming-based exercise management system can be supplemented together with analyses of weighted values considering connectivity between established indices.

• 한국정보처리학회논문지
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• 제6권4호
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• pp.988-998
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• 1999

본 논문에서는 LVQ(Learning vector Quantization)을 이용하여 퍼지 규칙의 수를 줄이는 방안을 제안하였다. 훈련 패턴이 많이지면 퍼지 규칙 수가 증가하게 되어 많은 기억용량과 많은 분류시간이 요구된다. 따라서 이러한 문제를 해결하기 위해서는 퍼지규칙의 수를 줄일 수 있는 방법이 강구되어야 한다. 그러나, 퍼지 규칙의 수가 줄어듦으로써 발생하는 성능의 하락을 최소화하기 위하여 양질의 초기 참조 패턴으로 훈련 한 후에, 퍼지 규칙을 생성한다. 시뮬레이션을 통해서 제안된 방법이 매우 효과적임을 알 수 있었다.

• 한국정보시스템학회지:정보시스템연구
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• 제18권1호
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• pp.97-115
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• 2009

This study proposes a framework for an evaluation and selection of a venture firm with promising new technology in optical electronics industry to nurture that firm. The framework is intended to help practitioners to evaluate accurately and objectively new technologies. In addition, this study tests the usability and effectiveness of this framework with an actual certain case. More specifically, this study, first proposes that the framework for new technology evaluation is composed of financial perspective, market perspective, internal business perspective, and R&D and growing perspective. They are on the four perspectives of BSC(Balanced Score Card). Each perspective contains specific items. In addition, this study uses AHP(Analytic Hierarchy Process) to assess the comparative importance among the four perspectives and their specific items. Secondly, based on the results of AHP, the usability and effectiveness of the framework suggested in this study have been tested with a real case evaluating and selecting a promising venture firm. The results of the study have the following implications: this study has developed the framework for new technology evaluation which assists practitioners. Our framework offers the four perspectives and their specific items with their respective comparative importance. Furthermore, this study has verified that the proposed framework can be applicable in real situation with more accurate results.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1049-1052
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• 2008

We developed novel molecular dynamics and quantum chemical molecular dynamics simulators for the design of MgO protecting layer in plasma display panel. These simulators were applied to the investigations on the destruction processes of the MgO protecting layer as well as the evaluation of its second electron emission ability. From the simulation results, we successfully proposed new guidelines for MgO protecting layer with high durability and high second electron emission ability.

• 한국실천공학교육학회논문지
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• 제3권1호
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• pp.56-61
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• 2011

IT기술의 발달로 SW 중요성이 높아짐에 따라서 대학졸업자들의 프로그래밍 능력에 대한 산업체 요구가 점점 높아지고 있다. 그 결과로, 시스템 위주의 전자공학 전공 교과목에서도 프로그래밍이 이미 많은 비중을 차지하고 있으며, 컴퓨터 실습실과 같은 교육환경은 상당히 개선되었고, 교수들이 강의의 질 및 교육 결과를 향상시키고자 많은 노력을 하고 있다. 하지만, 여전히 프로그래밍 교육에 대한 사회 및 산업체의 요구를 만족시키지 못하는 것도 현실이다. 본 논문에서는 한국기술교육대학교 전기전자통신공학부 전자전공에서 이루어지고 있는 프로그래밍 교육 현황을 소개하고, 프로그래밍 교육의 근간이 되는 1학년 대상 프로그래밍 언어 교육에 대한 문제점을 학생, 교재, 담당교수, 수강학생수 그리고 수업시간 면에서 고찰 한 후, 개선방안을 제안한다.

• 전자공학회논문지
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• 제51권6호
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• pp.183-189
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• 2014

최근 자동차에 불고 있는 스마트 바람은 더 이상 차량을 운송도구가 아닌 스마트 이동수단으로 만들어 놓았다. 스마트 자동차는 여러기술이 복합화되는 것이어야 하지만, 그중에서도 자동차의 통신 인프라로 자주 거론되는 것은 바로 WAVE(Wireless Access in Vehicular Environment)이다. 현재 국내의 현실은 WAVE를 활용하여 차량용 통신을 지원하기에는 어려운 상황이다. 가장 근본적인 이유는 주파수가 할당되어 있지 않기 때문인데, 본 논문에서는 WAVE관련 표준화 상황을 살펴보고 더불어 관련 전문가들의 설문에 근거하여 WAVE용 주파수의 할당이 어떤 식으로 이뤄져야 하는가에 대해서 살펴보도록 한다

• 펄프종이기술
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• 제47권5호
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• pp.43-51
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• 2015

This research was performed to investigate the quality of leaflets provided with newspapers. The leaflets were classified according to business types and regions. The physical and strength properties were analyzed. The sizes of leaflets were 2, 4, 8 jeoljis of crown octavo, A3, A4, A5, and B3, B4, B5. Most of them were color printed and both-sides printing was much more popular than one-side printing. The leaflets about electronics, educations, and clothing showed lower density than restaurant business and other areas. The leaflets of electronics, educations, and clothing, and large stores showed lower tensile strength, and those of restaurant businesses and building trades showed relatively high tensile strengths. No differences on the quality of leaflets except for large stores were found according to business areas. Large markets made the leaflets with various types of papers, and low quality papers were also included.