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RISS 인기검색어
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- 저자 : 임재현(Jae Hyun Lim) (검색결과 211 건)
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임재현,이준연,Lim, Jae-Hyun,Lee, Jun-Yeon 한국정보처리학회 2002 정보처리학회논문지 C : 정보통신,정보보안 Vol.9 No.6
본 논문에서는 웹상의 높은 가변성을 고려하여 웹 캐시 공간을 관리하는 새로운 접근 방법을 제안한다. 모든 문서를 저장하는데 하나의 캐시를 사용하는 것 대신에, 캐시를 분할하여 파일 타입에 따라 저장한다. 제안된 방법은 LFU, LRU와 SIZE 기반 알고리즘을 사용하여 현재의 캐시 관리 정책과 비교한다. 2가지의 서로 다른 실제 작업부하를 사용하며, 시뮬레이션을 통해 파일 타입별 캐싱이 적중률과 바이트적중률을 개선시킴을 보인다. This paper proposes a new access method which is to considered the high variability in World Wide Web and manage the web cache space. Instead of using a single cache, we divide a cache and store all documents according to their file types. Proposed method was compares with current cache management policies using LFU, LRU and SIZE base algorithm. Using two different workload, we show the improvement hitting ratio and byte hitting ratio through simulating on the file type caching.
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디지털카메라의 이미지센서와 사진해상도 상관성 연구 -라이카, 캐논, 니콘카메라를 중심으로-
임재현 ( Jae Hyun Lim ),이해만 ( Hai Man Lee ) 커뮤니케이션디자인학회 2009 커뮤니케이션 디자인학연구 Vol.30 No.-
This study was processed to comprehend the pixel of a camera through comparative study of the printing resolution classified by the camera pixel, and to show the quality of Ink-jet printer by decipher comparison experiments through the objective naked eye. The purpose of this study is to give tips to digital camera users on how to choose the right camera and how to print photos taken by it. Moreover, the study also ascertains the characteristic of digital cameras. As a result of the experiment, Leica Digital Module R, which has a wide scope of color reappearance, was excellent in overall color reappearance range. On the score of the noise problem under a low light source, Nikon D3 showed the best performance. Though Canon 5D was fairly good in general, the saturation section was relatively inferior than other types of camera. In the print paper case, Glacier was excellent in the reappearance of images, but was in lack of the shadow detail section. Through the process of the study it showed that although glossy paper is used widely to print digital photos, the detail reappearance ability is insufficient. Despite the fact that glossy paper is highly preferred in printing, selecting print papers should be done more cautiously from now on. While the overall brightness of matte print paper was low, the reappearance ability of shadow detail was better than glossy paper. In conclusion, the digital cameras with deep bit depth showed excellence in color reappearance ability, and the matte print paper was better in shadow detail reappearance compared to glossy paper. However, glossy paper resulted better in highlighting. In case of printers, the gelatin silver print was far better in quality than the Ink-jet printer. The study shows that the color of the ink used in the Ink-jet printer had a great effect on the quality of printing. Moreover it`s rich color expression and the reappearance ability of shadow detail is not inferior to gelatin silver print.
ScienceON
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