• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2002년도 금형가공 심포지엄
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• pp.26-33
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• 2002

Die Factory follows typical order adaptive manufacturing, and delaying delivery affects directly product development of customer, Manufacturing Management System is tried to comply with the appointed date of delivery. It acquires running signal from NC milling, calculates manufacturing results, and offers the basic data to manage the operation ratio. Thus it offers Production data necessary to accomplish the objective of progress improvement for Unmanned Manufacturing. Manufacturing Management System runs on Web Environment, and is composed of electronic work order, operation ratio data acquisition and totaling module.

• Journal of Communications and Networks
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• 제14권6호
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• pp.597-605
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• 2012

With the smart grid coming near, wide-area supervisory control and data acquisition (SCADA) becomes more and more important. However, traditional SCADA systems are not suitable for the openness and distribution requirements of smart grid. Distributed SCADA services should be openly composable and secure. Event-driven methodology makes service collaborations more real-time and flexible because of the space, time and control decoupling of event producer and consumer, which gives us an appropriate foundation. Our SCADA services are constructed and integrated based on distributed events in this paper. Unfortunately, an event-driven SCADA service does not know who consumes its events, and consumers do not know who produces the events either. In this environment, a SCADA service cannot directly control access because of anonymous and multicast interactions. In this paper, a distributed security framework is proposed to protect not only service operations but also data contents in smart grid environments. Finally, a security implementation scheme is given for SCADA services.

• 전자통신동향분석
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• 제33권2호
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• pp.48-55
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• 2018

Immersive media, which maximizes the viewer's sense of presence and immersion, has been developed in the form of 3D stereoscopic media and UHD media. Going one step further, VR media, which can provide immersive experiences within an artificially created environment, have recently been considered a type of next-generation media. Within this trend, numerous IT and broadcasting companies around the world are actively investing their time and resources to boost the emerging VR industry. In this paper, we introduce the representative VR media acquisition and broadcasting service technologies that are leading the current VR industry.

• 반도체디스플레이기술학회지
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• 제9권4호
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• pp.51-56
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• 2010

As the price of image acquisition component becomes low enough, the compact and easily accessible handheld devices are generally equipped with image acquisition functionality. This trend speeds up various applications in diverse areas such as image related services and software. Therefore users strongly need to identify their images effectively and efficiently so that the duplicated images are perceived as one physical entity. In order to handle this environment, we propose a number of methods that generate image identifiers utilizing fundamental image features. In this paper, we analyze the identifier generation methods in terms of various size patterns, especially for tiny size cases, since the small images does not contain abundant pixels for feature extraction. In this paper, experimental evaluation over identifier generation methods' behavior according to different sizes is demonstrated.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2012년도 제46차 하계학술발표논문집 20권2호
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• pp.257-260
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• 2012

소수력 발전은 대체에너지의 일환으로 공해가 없고 작동의 신뢰도가 높아 신재생에너지 연구개발과 관련하여 소수력발전에 대한 관심이 높아지고 있으나, 기존의 대수력용 수차와는 달리 소수력용 수차 및 주변 시스템의 설계법이 근래 확립되어 있지 않다. 본 연구에서는 수차의 크기 및 수차의 잠김 정도가 일정한 유량과 유속에 대하여 수차의 각 운동량, 즉 출력에 미치는 영향에 대하여 분석하고 이를 토대로 수차의 적정 설치기준 및 수차를 제어하기 위한 제어용 소프트웨어를 마련하기 위하여 실험 환경을 구성하고, 구성된 실험 환경에서 자료 취득을 하기 위한 전자 회로 및 소프트웨어를 구성하고, 구성된 장치와 환경에서 취득한 자료가 유효함을 확인하였다.

• 한국IT서비스학회지
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• 제8권1호
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• pp.125-142
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• 2009

The Ministry of Information and Communication announced "The Guideline for Management of Software Project" in October 2006. The public employees(acquirer) have to manage software projects with this guideline. The guideline was based on the International standard(ISO/IEC 12207) and IEEE standard(IEEE/EIA 12207), and was developed by considering the domestic software industry environment. The guideline can help to establish a software acquisition process for appropriate management of software projects, and the process can increase the management productivity of software projects. This study provides the explanation about the guideline with terms of 5W1H(who(user), what(summary), when(time to apply), where(domain of application), why(objective), how(method of use)) for understanding of the guideline.

• 한국수학교육학회지시리즈A:수학교육
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• 제40권2호
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• pp.253-263
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• 2001

Developing mathematical thinking skills is one of the most important goals of school mathematics. In particular, recent performance based on assessment has focused on the teaching and learning environment in school, emphasizing student's self construction of their learning and its process. Because of this reason, people related to mathematics education including math teachers are taught to recognize the fact that the degree of students'acquisition of mathematical thinking skills and strategies(for example, inductive and deductive thinking, critical thinking, creative thinking) should be estimated formally in math class. However, due to the lack of an evaluation tool for estimating the degree of their thinking skills, efforts at evaluating student's degree of mathematics thinking skills and strategy acquisition failed. Therefore, in this paper, mathematical thinking was studied, and using the results of study as the fundamental basis, mathematical thinking process model was developed according to three types of mathematical thinking - fundamental thinking skill, developing thinking skill, and advanced thinking strategies. Finally, based on the model, evaluation factors related to essential thinking skills such as analogy, deductive thinking, generalization, creative thinking requested in the situation of solving mathematical problems were developed.

• 산업경영시스템학회지
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• 제26권3호
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• pp.67-73
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• 2003

Manufacturing technologies of compound semiconductor are similar to the process of memory device, but management technology of manufacturing process for compound semiconductor is not enough developed. Semiconductor manufacturing environment also has been emerged as mass customization and open foundry service so integrated manufacturing system is needed. In this study we design the integrated manufacturing system for compound semiconductor fabrication t hat has monitoring of process, reduction of lead-time, obedience of due-dates and so on. This study presents integrated manufacturing system having database system that based on web and data acquisition system. And we will implement them in the actual compound semiconductor fabrication.

• 산업공학
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• 제25권3호
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• pp.347-356
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• 2012

The acquisition cost of defense weapon system has been continuously increasing because of art-of-technology of it. This phenomenon requires efficiency and transparency in the weapon system acquisition process through cost estimation. Therefore cost estimation is very important to the government acquisition programs to support decisions about funding and to evaluate resource requirement as a key decision point. The Commercial parametric cost estimating models have been using extensively to obtain appropriate cost estimates in early acquisition phase. These models have many restrictions to ensure the cost estimating result in Korean defense environment because they are developed based on foreign R&D data. Also estimation results are different from Korean defense industry accounting system. So, some studies have been tried to develop a CER (Cost Estimation Relationship) based on the Korean historical data. However, there are some restrictions to improve the predictability and ensure the stability of the developed singular CERs which consider the following data characteristics individually. The the abnormal conditions of data that is multicollinearity, outlier and heteroscedasticity under rack of the number of observations. In this paper, a CER's Linear Combining Model is proposed to overcome those limitations which guarantee more accurate estimation (25.42% higher precision) than other singular CERs. At least, this study is meaningful as a first attempt to improve the predictability of CER with insufficient data. The methodology suggested in this study will be useful to develop a complex Korean version cost estimating model development in future.

• 한국산학기술학회논문지
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• 제18권2호
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• pp.426-432
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• 2017

본 논문에서는 주요 선진국의 국방획득조직 현황과 관련 분석에 따른 시사점, 국방획득체계의 전문성 활용 방안과 관련 과 방위사업감독관의 운용현황, 결론적으로 각 전문분야에서의 전문화 및 운용방안, 기대효과와 향후방향을 중장기적 관점에서 비교 분석하였다. 세부적으로, 주요 선진국의 국방획득조직의 현황을 통해서 국내에 적용 가능한 운용체계를 식별하였고, 각 분야의 운용방안을 반영하면서 방산비리 근절과 방위사업감독관의 효율적인 운용이라는 부분이 정부를 비롯하여 각 기관, 민간 기관들 등 전사적인 노력이 밑받침이 되어야 한다는 사실을 도출할 수 있었다. 법적 제도적 관점에서 법 정비의 시급성을 강구하는 기회가 되었고, 그리고 현재의 사전검증 절차 수립이라는 부분이 투명성, 신뢰성, 전문성을 제 3자 관점에서 투명성을 확립할 수 있는 제도적 근거가 되었다는 점에서 큰 의의가 있다고 판단한다. 결론적으로, 방위사업감독관의 운용은 방위사업 전반에 대한 사전 감독체계 수립을 가능하게 하고, 업무적 독립성을 최대한 보장할 수 있는 환경을 구축할 수 있다는 점에서 그 영향력을 기대해 볼만 하다.