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은 잉크를 이용한 그라비아 오프셋의 전극인쇄에서 닥터링 공정의 영향
최기성,박진석,송정근,Choi, Ki Seong,Park, Jin Seok,Song, Chung-Kun 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.6
In this paper, we analyzed the effects of doctoring process on the patterns of Ag ink in gravure off-set printing. The parameters of doctoring process were the angle and the pressure, which was represented by the depth of blade movement to the gravure roll, of doctor blade to the surface of gravure roll, and the angle of patterns engraved on the gravure roll to the doctor blade moving direction. The proper parameters were extracted for the fine patterns and they were 15 mm for the pressure, $60^{\circ}$ for the blade angle. And the angle of patterns with respect to the blade movement should be less than $40^{\circ}$ for the best results. The gravure off-set printing with the above parameters was carried out to print gate electrodes and scan bus lines of OTFT-backplane for e-paper. The line width of $50{\mu}m$ was successfully obtained. The thickness of electrodes was $2.5{\mu}m$ and the surface roughness was $0.65{\mu}m$ and the sheet resistance was $15.8{\Omega}/{\Box}$.
최기성 ( Ki-seong Choi ),최규식 ( Gyu-shik Che ) 한국항행학회 2016 韓國航行學會論文誌 Vol.20 No.6
감마선이 존재하는 시설물에서는 발생 즉시 이를 발견하여 처리해야 하며 이와 관련하여 무작위적으로 발생하는 신호를 처리하는 소프트웨어적인 방법을 사용하기도 하나 소프트웨어의 메모리 용량과 처리시간이 커지게 된다. 한편 하드웨어적인 방법으로 신호처리할 수 있는 회로가 일반화되어 있으나 발생 신호의 크기가 미약하고 속도가 고속인 경우에는 이에 대응하지 못한다. 하드웨어적으로 효과적으로 신호처리하려면 값이 매우 비싼 부품과 복잡한 회로를 필요로 한다. 따라서 본 연구에서는 크기는 미약하지만 속도가 고속인 감마선 발생신호에 대해서 하드웨어적으로 간단한 피크홀드 회로를 개발하여 피크 시점에서 ADC가 신호값을 직접 읽어냄으로써 감마선 신호의 피크치를 검출하는 회로를 연구, 개발하였다. 이러한 방법으로 하면 복잡한 소프트웨어 신호처리 방법을 사용하지 않고도 고속 발생신호를 효과적으로 포착할 수 있으므로 감마선의 존재가 농후한 방사능 환경에서 이를 사용하기에 적합하다. Gamma-ray must be detected and processed immedietely after generation of it in the circumstances where it exists. Software methology may be used to process randomly generated signals, but its memory size and processing time become large. By the way, the hardware circuit to detect randomly generated signals is generalized in industrial site, while those circuits are not able to answer to the cases whose amplitude are very small and also speed high. We researched and developed hardware based peak-hold circuit that is able to detect peaks of gamma-ray signals through direct reading out their values by ADC at the time of maximum reaching for the small amplitude and high speed signals, and proposed and estimated its results in this paper. This peak-hold circuit is adequate to use in the radiation circumstances in which the gamma-rays are heavy because its circuit can catch high speed signals efficiently without software signal processing supports.
SOME PROPERTIES OF M-SUBHARMONIC FUNCTIONS RELATED WITH POSITIVE LINEAR OPERATORS ??
최기성 建陽大學校 1999 建陽論叢 Vol.- No.7
In this paper, we will define some positive linear operator and investigate some properties of Harmonic functions and subharmonic functions related with the positive linear operator Pr on C(S).
INTEGRAL FORMULA OF SOME HOLOMORPHIC FUNCTIONS ASSOCIATED WITH WEIGHTED LEBESGUE MEASURE IN ??
CHOI, KI SEONG 建陽大學校 1998 建陽論叢 Vol.- No.6
Let B be the open unit ball in the n-dimensional complex space Cⁿ. We will investigate the properties of group of automorphisms on B and find integral representation of some holomorphic functions on B.
Bochner Integrability Of Functions On a Product Space
Choi, Ki Seong,Yang, Gye Tak 建陽大學校 1997 建陽論叢 Vol.- No.5
Let H be a complex-valued measurable function on a product space. We will find some conditions of H such that [H(y, ·)] is Bochner integrable.
An Inequality on the Wiener space via Dirichlet Form
Choi, Ki Seong 建陽大學校 1996 建陽論叢 Vol.- No.4
Let us consider the Wiener space (W,m). In this paper, I will investigat e quasi-everywhere property in an inequality on the Wiener space (W,M).
Notes on the reduced function and its regularization
CHOI, KI SEONG 建陽大學校 2000 建陽論叢 Vol.- No.8
In [3], K.T. Hahn and David Singman obtained some results which generalize the results in [5]. In [3], they used reduced function R(EV) and it's regularization R(EV) to obtain their results about boundary behavior of Green's potentials. In this paper, we will investigate some properties of the reduced function and it's regularization in detail.
Quadratic Variation in Wiener Space
Chang, Kun Soo,Choi, Ki Seong,Jang, Soon Yeun 연세대학교 자연과학연구소 1989 學術論文集 Vol.22 No.-
1947년 Cameron과 Martin은 이항분할을 사용해서 Wiener측도 거의 모든 X에 대하여 X의 이차변동이 1/2이 됨을 보였다. 그들의 결과는 Johnson과 Skoug에 의해 Wiener공간에서 척도 불변 가측성 개념을 정립하는 데 사용되었다. 이 개념은 Feynman적분론의 기초가 된다. 이 논문에서는, Cameron과 Martin의 결과를 이항분할을 포함하는 좀더 큰 분할의 모임으로 확장한다. In 1947, Cameron and Martin proved that for Wiener measure almost every x in Wiener space the quadratic variation of x is 1/2 by taking binary partitions. Their result was used to develop the concept of Scaleinvariant measurability in Wiener Space by Johnson and Skong. The theory of Feynman integral is based on their concept. In this paper, we extend Cameron and Martin's results to a broad class of partitions which contains binary partitions.