• The monthly packaging world
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• s.201
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• pp.92-94
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• 2010

• Information Display
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• v.4 no.4
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• pp.14-19
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• 2003

CRT용 Glass 산업의 경우, 금형 및 유리의 온도는 매우 중요한 변수이다. 이 온도는 상온에서 출발한 금형이 반복되는 Heat Cycle을 거치면서 안정화 상태로 이르게 되는 과정을 거치면서 결정된다. 이때 안정화되는 금형의 온도분포에 의해 제품의 품질이 결정됨에 따라, 불량이 발생할 경우, 안정화 시간 및 금형수정 Cost 증가 등 매우 큰 손실이 야기된다. 이에 본 연구는 CAE를 통하여 상기 Heat Cycle의 해석과정 중에서, I-DEAS의 MACRO인 "Program file"을 이용하여 Modeling 및 Meshing을 수행하여 단시간 내 정확한 Preprocessing을 통해 유동 및 열 해석에 적용하는 자동화 프로그램을 개발하였다.

• Journal of Astronomy and Space Sciences
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• v.25 no.4
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• pp.445-458
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• 2008

Image chain analysis of synthetic aperture radar (SAR) satellite is one of the primary activities for satellite design because SAR image quality depends on spacecraft bus performance as well as SAR payload. Especially, satellite pointing and stability error make worst effect on the original SAR image quality which is implemented by SAR payload design. In this research, Image chain analysis S/W was developed in order to analyze the SAR image quality degradation due to satellite pointing and stability error. This S/W consists of orbit model, attitude control model, SAR payload model, clutter model, and SAR processor. SAR raw data, which includes total 25 point targets in the scene of $5km{\times}5km$ swath width, was generated and then processed for analysis. High resolution mode (spotlight), of which resolution is 1m, was applied. The results of image chain analysis show that radiometric accuracy is the most degraded due to the pointing error. Therefore, the successful design of attitude control subsystem in spacecraft bus for enhancing the pointing accuracy is most important for image quality.

• KIPS Transactions on Software and Data Engineering
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• v.2 no.8
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• pp.507-516
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• 2013

Mobile devices have limited computing power and resources. Since mobile devices are equipped with rich network connectivity, an approach to subscribe cloud services can effectively remedy the problem, which is called Mobile Cloud Computing (MCC). Most works on MCC depend on a method to offload functional components at runtime. However, these works only consider the limited verion of offloading to a pre-defined, designated node. Moveover, there is the limitation of managing services subscribed by applications. To provide a comprehensive and practical solution for MCC, in this paper, we propose a self-stabilizing process and its management-related methods. The proposed process is based on an autonomic computing paradigm and works with diverse quality remedy actions such as migration or replicating services. And, we devise a pratical offloading mechanism which is still in an initial stage of the study. The proposed offloading mechanism is based on our proposed MCC meta-model. By adopting the self-stabilization process for MCC, many of the technical issues are effectively resolved, and mobile cloud environments can maintain consistent levels of quality in autonomous manner.

• Food Science and Preservation
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• v.18 no.4
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• pp.436-441
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• 2011

The change in physicochemical and sensory properties and bioactive compounds of Campbell grape juice has been investigated for 30 days at $-5^{\circ}C$. The pH and sugar/acid ratio of the cold stabilized juice increased, while titratable acidity and soluble solids decreased as cold stabilization period is prolonged. Juice samples became lighter, yellowish to brownish and lesser red in color as can be observed with the increasing $L^*$ and $b^*$ values, and decreasing $a^*$ value, respectively. The juice cold stabilized for a shorter period of time showed higher levels of bioactive compounds and radical scavenging activity, and was more preferred by the panelists than the juice cold stabilized for a longer period of time. These results suggest that cold stabilization period affected the quality characteristics of grape juice.

• KOREAN POULTRY JOURNAL
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• v.12 no.2 s.124
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• pp.33-35
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• 1980

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.37 no.4
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• pp.399-405
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• 2009

The focal plane image stabilization for a satellite camera is one of the an effective method which can increase the satellite camera's image quality by removing the motion disturbance of a focal plane. The objectives of this article are to introduce the concept of the focal plane image stabilization and determine the best driving conditions of the actuator for the response and thrust. Under various driving condition the experiments have been performed to investigate the response and thrust characteristics of the piezoelectric driven stick-slip actuator of the focal plane image stabilizing device. From experiments, the best driving frequency and duty ratio for the magnesium slider are 70 kHz and 27%, respectively.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.227-228
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• 2013

본 논문은 2012년도 12월 31일 새벽 4시를 기하여 아날로그 지상파텔레비전이 디지털 지상파텔레비전으로 완전 전환되어짐에 따라 초고속정보통신건물인증에서 "특등급"건물도 필수적으로 광장비(광수신기)가 댁내의 세대단자함에 들어가야 함으로서 현재의 산업적 보급 현황에 대하여 알아보고자 한다. 방송공동수신설비에서 가장 중요한 설비로서 세대단자함에 광수신기가 들어가야 하지만, 최근의 경기침체로 인하여 건설경기도 침체됨으로서 구내통신설비에도 영향이 있는 것으로 파악되고 있다. 2009년 11월에 개정된 "방송공동수신설비의 설치기준에 관한 고시"와 초고속정보통신건물인증업무 처리지침 개정에 따라 특등급의 공동주택은 광선로 및 광 장비가 도입되어야 하나 초기 품질의 안정화나 장비의 활성화가 안되는 상황에서 고가의 장비가 일반적이었으나, 현재는 일부 대단히 단지가 조성됨으로서 추가적인 인하요건이 발생하고, 향후 1~2년 안에 점진적으로 가격과 품질이 안정화가 이루질 것으로 예상된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.430-434
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• 2002

Recently, lot of researchers pay attention to custom power equipments for power quality improvement, especially, voltage stabilization equipment using PWM AC-AC converter. In this paper, voltage regulation system with PWM Buck-Boost AC-AC converter is proposed and then the system is modelled and analyzed by using of Circuit DQ transformation whereby steady state characteristics such as equations for voltage gain and power factor are obtained. The equations become guide line for system design by showing the effect on system operations. Finally, some experiment will show validity of analysis.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.817-824
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• 2002

자연재해, 인위적인 재해 등 회사 경영에 관련해 다양한 리스크 문제가 나타나고있으며 리스크에 대한 적절한 대응을 하고 안정화를 도모함과 동시에 리스크 문제가 표면화되어 초래하는 영향을 극소화하기 위한 포괄적인 새로운 패러다임의 경영시스템 도입이 주요 전략과제로 대두되고 있다. 본 연구에서는 리스크 위험 요소를 줄이고 품질 향상의 목적으로 기업의 경쟁력 강화를 위한 새로운 모델로써 기존 ISO 9000 품질경영시스템과 JIS Q2001 리스크 경영시스템의 통합모델을 제시하고자 한다.