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박건식,박종문,윤용선,김보우,강진영,Park, K.S.,Park, J.M.,Yoon, Y.S.,Kim, B.W.,Kang, J.Y. 한국전자통신연구원 2007 전자통신동향분석 Vol.22 No.5
X-선 측정 및 영상장치를 포함한 다양한 응용분야에서 방사선에 대한 고해상도의 영상을 얻기 위한 목적으로 반도체 검출기에 대한 개발이 활발히 진행되고 있다. 본 고에서는 방사선 검출을 위해 요구되는 반도체 물질의 주요 특성에 대해서 조사하였다. 또한 반도체를 이용한 플랫 패널(flat panel) 시스템, 픽셀 디텍터(pixel detector)와 스트립 디텍터(strip detector) 등의 혼성형 디텍터(hybrid detector), MAPS와 DEPFET 등의 단일형 픽셀 디텍터(monolithic pixel detector)의 디바이스 동작 원리 및 특성과 국내외 기술 동향에 대하여 살펴보았다.
오윤택(Yoon-Taek Oh),김희원(Hee-Won Kim),김형진(Hyung-Jin Kim),고영찬(Young-Chan Ko),박종문(Jong-Moon Park) 한국펄프·종이공학회 2019 펄프.종이技術 Vol.51 No.1
The smoothness of coated paper for the high end printing materials would be one of the most important properties for the print quality. In this study, the surface of paper was measured with stylus by 2,000 to 20,000 data. Using these data, the FD values of thickness and friction mean deviation were obtained through the JMP program. The optimal conditions for measurement of the coated paper’s surface were surveyed by varying the load on the stylus and the number of data derived. FD values were measured to analyze surface characteristics such as roughness and smoothness of coated paper. The larger the number of data derived, the more detailed the measurement was possible, and it gave lower fractal value. Proper pressure on paper and measuring distance of stylus in order to differentiate hill and crater of paper surface were important. 5 gf stylus pressure and 20,000 data were proper among various conditions. FD values of base paper and coated paper were 1.30-1.36 and 1.19-1.29 respectively, and the results showed the smoothness of coated paper was improved by coating process.