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최신형 스마트폰 디스플레이 색재현 성능향상에 관한 비교연구AMOLED 및 TFT-LCD를 중심으로
김현서 ( Hyun Suh Kim ),신수근 ( Soo Keun Shin ),이용환 ( Yong Hwan Lee ) 한국사진학회 2014 AURA Vol.0 No.32
This paper carries out an evaluation of the quality of preferred colors in digital photography reproduced on the display of smart phones. In order to inquire into the display that has established itself as a major media of the reproduction of digital photographs, this study compares the color reproduction ability of two smart phones equipped with the latest display technologies such as AM-OLED and TFT-LCD and evaluates their colors and image quality. The methods of research include: 1) an analysis of the results of preceding research through the process of an objective evaluation of colors; and 2) addition of details of an analysis of the enhanced display of the newest smart phones and suggestion of a few supplement points. It is safe to say that the scale of delivery of various visual arts through smart phones has recently exceeded that through the analogue methods. According to this flow, an objective evaluation of digital colors and a study on standards have become necessary subjects of research, regarding the way in which a picture taken is digitally reproduced on a display. This paper recorded a comparative analysis of the trend of colors reproduced through smart phones in the processes of producing and generating digital images. The displays are calculated from the range of the performance included within display gamut volume from six categories of database that are luminance, white balance, gray scale linearity, RGB channel, color reproduction and contrast.
질화물 우선석출이 발생하는 결정립계 어긋남 각도의 통계 및 확률적 평가
김성준 ( Sung Joon Kim ),이상호 ( Sang Ho Lee ),이태호 ( Tae Ho Lee ),최병학 ( Byung Hak Choe ),신수근 ( Soo Keun Shin ) 대한금속재료학회 ( 구 대한금속학회 ) 2007 대한금속·재료학회지 Vol.45 No.5
The distribution and prediction interval for the misorientation angle of grain boundary at which Cr2N was precipitated during heating at 900℃ for 10(4) sec were estimated. The misorientation angles had a lognormal distribution with parameters μ=3.680, σ=0.09817. The prediction interval of the misorientation angle could be obtained by the median rank regression method and the mathematical method. The prediction interval by the median rank regression had larger values than that by the mathematical method.
초내열 합금 Alloy718의 저주기 피로시험에서 반복연화 및 R=X (X=0,-1)효과
최병학,신수근,신정근,김선화,윤기봉,염종택,박노광 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-
The LCF properties for R=0 as tension-tension and R=-1 as tension-compression were examined in DA alloy718. While the hysteresis loops composed of ?ε_(t), ?ε_(p) and ?σ were figured with similaity in both of R=0 and R=-1, the loops of R=0 were continuely going down along the stress axis during cyclic fatigue progressing. It was caused by Bauschinger effect, which includes a tendancy for stress recovering as an amount of compression stress. The phenomena of cyclic softening in both of R=0 and R=1 seem to be caused by planar slip of dislocations, which was accompanied by shearing the γ'/γ" precipitates during the cyclic fatigue test.