• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.41 no.1
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• pp.78-84
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• 2005

The main goal of this work is to study the effects of temperature and volume fraction of fiber on the Charpy impact test with GF/PP composites. The critical fracture energy and failure mechanisms of GF/PP composites are investigated in the temperature range of 60^{\circ}C$ to -50^{\circ}C$ by impact test. The critical fracture energy increased as the fiber volume fraction ratio increased. The critical fracture energy shows a maximum at ambient temperature and it tends to decreases as temperature goes up or goes down. Major failure mechanisms can be classified such as fiber matrix debonding, fiber pull-out and/or delamination and matrix deformation.

• 대한치주과학회:학술대회논문집
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• 2007.11a
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• pp.140-141
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• 2007

• 대한치주과학회:학술대회논문집
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• 2007.11a
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• pp.197-198
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• 2007

• Journal of the Korean Home Economics Association
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• v.44 no.6 s.220
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• pp.59-69
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• 2006

This study explored the antecedent variables associated with variability in toddler's aggressive behavior. The subjects were 182 toddlers(101 boys and 81 girls) and their mothers. Data were collected via questionnaires. The main results of this study were as follows ; First, aggression was significantly correlated with toddler age, but not with gender. Mother's parenting was related to boy's aggression, whereas both temperament and parenting were significantly related to girls' aggressive behavior. However, day-care variabes were not the significantly associated with toddler's aggression. Second, regression analyses revealed the interaction effect of child temperament and parenting, after controlling for main effects.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.32 no.4
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• pp.275-282
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• 2008

In Korea, air source heat pump system is less efficient than conventional heat source facilities, because the air temperature in winter season is so low that COP of air source heat pump system drops below 3.0. Therefore, the study on the application of heat pump heating and cooling systems is crucial for the efficient popularization of heat pump. In this work, we present the dynamic analysis of energy consumption for the large hospital building by heat resistance-capacitance method. The system simulation of water storage air source heat pump is additionally performed by changing sizes and locations of the hospital building. The computed results show that energy cost of water storage air source heat pump is low, so it is more economical than absorption chiller & heater.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.767-770
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• 2000

저 대역 망에서 동영상을 실시간으로 전송하기 위해서는 높은 압축률을 요구한다. 따라서 복원된 이미지는 화질 저하라는 현상을 낳게 되는데 본 논문에서는 복원 이미지의 화질 보상에 대한 방법으로 디코더에서 블록 아티팩을 제거하고 복원 이미지를 선명하게 하는 알고리즘을 제안한다. 여기서 화질 보상은 원본 이미지와 동일하게 만드는 것이 아니라 인간이 더 좋은 영상으로 인식하도록 하는 걸 목적으로 한다.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.272-277
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• 2004

Recently reliability Improvement and certification are considered as important issues by world-wide leading and highly qualified companies in advanced countries. In Korea, from a few years ago, the policy for reliability certification newly has been driven to improve product competitiveness in part and material industry. As yet the reliability certification is local and domestic, it is necessary to develop local certification system to global certification system. Reliability certification system is composed of accreditation body, testing laboratory and reliability assurance. In this paper, we review the reliability certification system and its application in Korea and the current research trends in advanced countries. Finally we propose some suggestions for the eliability certification system to be an international standard.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2007.04a
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• pp.367-372
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• 2007

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.797-803
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• 2002

다양한 리스크 문제가 발생하고 있는 기업 환경 속에서 세계선도 기업들은 이미 효과적인 리스크 관리시스템의 운영을 통하여 개업의 손실을 최소화함으로써 이윤을 극대화하고 있으나 우리 기업들은 아직 그렇지 못한 실정이다. 본 연구에서는 국제규격인 ISO14971과 IEC62198, JIS Q2001의 리스크 경영 규격을 중심으로 리스크 경영 시스템(Risk Management System :RMS)의 구성을 분석 비교한다. 각각의 규격에서 사용되는 적용범위, 용어 및 정의 리스크 경영의 개념과 절차, 경영 시스템에 적용되는 기법들을 비교, 분석하여 우리 기업들이 가지고있는 리스크 문제를 효과적으로 관리할 수 있는 대안 모색을 가능하도록 하는 기초 자료를 제시하고자 한다.

• 한국지구물리탐사학회:학술대회논문집
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• 2011.10a
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• pp.101-102
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• 2011