• 한국수소및신에너지학회논문집
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• 제12권2호
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• pp.121-128
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• 2001

In order to study the relation between expansion of the specimen and the hydrogen absorption rate, thin palladium plates with cold rolling were used. Thin palladium plates were hydrogenated in the 0.1mol $H_2SO_4$ electrolyte by electrochemical method. The expansion behavior on hydrogen absorbing can be obtained by X-ray diffraction analysis and by micrometer measurement It is noted that the expansion rate of Palladium specimens in thickness direction is larger than in length and width direction. The lattice constants increase quickly with increasing hydrogen absorbing rate up to 0.5, but above the rate they keep constant. Also the clues for plastic deformation, such as slip lines and voids, were observed in abundantly even though the plates were hydrogenated once.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 D
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• pp.2500-2502
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• 2002

실시간으로 빠른 응답을 원하는 시스템에서 임베디드 시스템은 매우 적절한 요소가 되었으며 원격제어를 위해 네트워크를 이용한 연구가 많아지고 있다. 본 논문에서는 PC기반의 원격제어 시스템을 임베디드화 하고 여기에 실시간 운영체제를 이식하여 시스템의 안정성과 속도 면에서 우수한 시스템을 구현하려고 한다. 이를 위하여 임베디드 시스템인 상용의 EZBoard와 운영체제로 real time OS를 사용한다. 네트워크로는 통신 프로토콜은 TCP/IP를 이용하려고 한다. 나아가 이 시스템을 Doorlock 제어 시스템에 적용시키려고 한다.

• 한국시스템다이내믹스연구
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• 제9권1호
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• pp.107-123
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• 2008

Recently, due to the globalization of business, the efficient supply chain management(SCM) is considered as the key initiatives of business activities, and the leading logistics companies are trying to provide the differentiated 3PL services to meet their customers' needs. The domestic 3PL market scale, however, is still small and the logistics companies' competence is not good enough, so that 3PL companies need to concentrate on their logistics strategies and the government's supports and related policies are required. In this point of view, we developed the system dynamics model and forecasted middle or long-term domestic 3PL market. Through the result, we suggest the roles of government and the directions of policies to support the domestic 3PL market effectively.

• 대한한의학회지
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• 제20권4호
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• pp.29-38
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• 2000

In China, there are many books of medical record since Mingaileian which was written by Guan Jiang and Ying-Xiu Jiang in 1552. On the other hand, in Korea there are few medical records and the study of them is not widespread. The purpose of this study is promoting the study on the Korean medical records by the investigation on the medical records in the Euimunbogam which was written by Myoung-Shin Zhu in 1724. The book is composed of 263 medical records. Among them, 215 records are quoted from Chinese medical books and 48 records are original. There are some quoted books which were written after Dongeuibogam, such as Shoushibaoyuan, Zhingyuequanshu etc.

• 대한한의학회지
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• 제29권5호
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• pp.104-110
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• 2008

Objectives : The purpose of this study is to develop the method of selecting representative pulse wave. Methods : The pulse waves were acquired at the right and the left Guan point(關部) with 1420 people who were apparently healthy. The shape agreement of right and left pulse wave and the floating-sinking ratio were compared with three cases, which were the pulse height based method, the pulse area based method, and the pulse time based method. Results : In the point of the shape accordance, the pulse time based method was the best, and the pulse area based method was the worst. In the point of the floating-sinking ratio, the pulse height based method was the worst, and the pulse time based method was the best. Conclusions : So, the pulse time based method was recommended for selecting the representative pulse wave. This study compared the selection methods of representative pulse using the physiological characteristics of pulse wave. Further studies are required, because the representative pulse wave is the main factor of determining the shape and the floating-sinking characteristic of the pulse wave.

• 한국수소및신에너지학회논문집
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• 제29권5호
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• pp.483-489
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• 2018

Recently proposed organic flash cycle (OFC) was shown to potentially improve power generation using low grade heat source. In this paper, a thermodynamic performance is carried out for a modified OFC employed double expansions. Effects of the selection of working fluid and the important system parameters such as the temperatures in flash evaporators on the system performance were extensively investigated. Results showed that the system performances are strongly influenced with the system parameters and selection of the working fluid, and the power generation can be increased compared to the basic OFC.

• 한국수소및신에너지학회논문집
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• 제29권5호
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• pp.490-496
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• 2018

Recently, the power and refrigeration cogeneration based on Kalina cycle has attracted much attention for more efficient utilization of low-grade energy. This study presents a thermodynamic performance analysis of a cogeneration cycle of power and absorption refrigeration based on Kalina cycle. The cycle combines Kalina cycle (KCS-11) and absorption cycles by adding a condenser and an evaporator between turbine and absorber. The effects of ammonia mass fraction and separation pressure were investigated on the system performance of the system. Results showed that the energy utilization of the system could be greatly improved compared to the basic Kalina cycle.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1148-1151
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• 2009

A self-designed, written in labview, Organic Light-Emitting Diode junction temperature measuring program was used to calculate the internal junction temperature for devices during operation, and an infrared thermometer was used to measure the backside temperature of the device substrate, to discuss the effects of the junction and substrate temperature difference to the characteristics of the device.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2002년도 추계학술발표논문집 (중)
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• pp.1171-1174
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• 2002

파일 내에서 바이러스의 패턴을 탐색하는 현재의 백신 프로그램으로는 매일 수없이 제작되는 바이러스에 시기 적절하게 대응하지 못하는 어려움이 있다. 바이러스에 감염된 파일을 사후 처리하는 이러한 방식으로는 늘어나는 바이러스 문제를 궁극적으로 해결하지 못한다. 따라서 본 논문에서는 이러한 바이러스의 행위를 탐지할 수 있는 가상 실행기를 제안한다. 제안된 시스템은 대표적인 서버 운영체제인 리눅스 상에서 동작할 수 있도록 설계한다. 이를 이용함으로써 리눅스가 설치된 파일서버에 저장된 각종 윈도우 파일의 바이러스 감염여부를 판단할 수 있다. 또한. 제안된 시스템은 리눅스 뿐만 아니라 다른 Unix 계열 플랫폼에서도 동작할 수 있다는 장점이 있다.

• Structural Engineering and Mechanics
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• 제6권1호
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• pp.31-40
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• 1998

The research and applications of numerical methods of design optimization on structural dynamic behaviors are presented in this paper. The emphasis is focused on the dynamic design optimization of aerospace structures, particularly those composed of composite laminate and sandwich plates. The methods of design modeling, sensitivity analysis on structural dynamic responses, and the optimization solution approaches are presented. The numerical examples of sensitivity analysis and dynamic structural design optimization are given to demonstrate the effectiveness of the numerical methods.