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곽진호(Jin Ho Kwak),이재운(Jaeun Lee) 한국정보과학회 1995 정보과학회논문지 Vol.22 No.8
네트워크(Interconnection network) 모델들로 사용되어지고 있는 Hypercube, Butterfly, Wrapped Butterfly, Cube-connected-cycles 등이 지금까지 bit binary string을 이용하여 표현되어지고 이로부터 대수적인 방법인 수론과 군론을 이용하여 주로 연구되어 왔다. 본 논문에서는, 이들 네트워크가 가지고 있는 대칭성과 국소 대칭성을 이용하여 위상적인 방법인 크기(size)가 작은 기저 네트워크(base network)상의 피복으로 표현하는 방법을 소개한다. 또한 이러한 성질을 이용하여 두 네트워크 사이의 네트워크 함수를 그들의 기저 네트워크에서 정의된 네트워크 함수를 이용하여 구성하는 방법을 제시하고, 그 구성되어진 함수의 효율성을 계산 할수 있는 공식을 유도하였다. Most standard network models, like Hypercube, Butterfly, Wrapped-butterfly, Cube-connected-cycles, etc , are described by using bit binary string, and have been examined mostly by using algebraic tools like number theory or group theory. In this paper, we introduce a new topological method to discribe them as covering networks over simple base networks by using global or local symmetries of networks. By using this new description, we obtain a method to construct network mappings between large interconnection networks when a mapping is given between their base networks, and a formula to measure the efficiency of the constructed mapping.
박보성,김현정,신현호,박성민,이재운,전성건,나윤채,Park, Bo-Seong,Kim, Hyun-Jeong,Shin, Hyeonho,Park, Seongmin,Lee, Jaeun,Jeon, Sunggun,Nah, Yoon-Chae 한국재료학회 2021 한국재료학회지 Vol.31 No.3
Electrochromic devices (ECDs) have been drawing great attention due to their high color contrast, low power consumption, and memory effect, and can be used in smart windows, automatic dimming mirrors, and information display devices. As with other electronic devices such as LEDs (light emitting diodes), solar cells, and transistors, the mechanical flexibility of ECDs is one of the most important issue for their potential applications. In this paper, we report on flexible ECDs (f-ECDs) fabricated using an all-in-one EC gel, which is a mixture of electrolyte and EC material. The f-ECDs are compared with rigid ECDs (r-ECDs) on ITO glass substrate in terms of color contrast, coloration efficiency, and switching speed. It is confirmed that the f-ECDs embedding all-in-one gel show strong blue absorption and have competitive EC performance. Repetitive bending tests show a degradation of electrochromic performance, which must be improved using an optimized device fabrication process.