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휴대용 멀티미디어기기를 위한 RAW 이미지 포맷 분석 및 응용
박미란(Park, Mi-Ran),신소희(Sin, So-Hee),김재신(Kim, Jae-Shin),노광현(Ro, Kwang-Hyun) 한국산학기술학회 2009 한국산학기술학회 학술대회 Vol.- No.-
본 논문에서는 RAW 이미지 포맷 중 PEF, MRW에 대한 분석 결과와 RAWImage Viewer에 대해 소개한다. DSLR 디지털 카메라로 촬영되는 이미지 파일은 범용의 JPEG 포맷이나 제조사별 독자적인RAW 이미지 포맷으로 저장된다. 이러한 RAW 이미지 파일을 PMP 등의 휴대용 멀티미디어 기기나디지털액자에서 재생 및 확인하기 위한 요구가 증대되고 있다. 하지만, RAW 이미지 포맷이 디지털카메라 제조사별로 다르고, 해당 포맷에 대한 구체적인 정보가 공개되지 않아 대부분의 휴대용 멀티미디어 기기에서 RAW 이미지 파일 재생 기능을 완벽하게 지원하지 못하고 있다. 본 논문에서는 RAW이미지 파일 포맷을 분석하여 다양한 임베디드 멀티미디어 기기에서 모든 RAW 이미지 파일을 지원할 수 있는 라이브러리 구축을 위한 연구 결과 중 일부를 소개한다. Cannon의 CRW, CR2 포맷과Nikon의 NEF 분석 결과에 이어 PEF, MRW에 대한 분석 결과와 RAW 이미지 출력 및 분석 기능이포함된 RAWImage Viewer에 대해 설명한다. 연구 결과는 RAW 파일을 재생할 수 있는 임베디드 장비 및 PC용 RAW 이미지 파일 재생 라이브러리를 구축 및 응용 프로그램 개발시 활용될 것이다.
배성훈(Seoung-Hun Bae),김준현(Jun-Hyun Kim),정연주(Yeon-Ju Jung),강상규(Sang-Kyu Kang),김재신(Jae-Sin Kim),김흥규(Heung-Kyu Kim) 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.2
In this paper, we compared the efficiencies of national R&D investments between NT (Nanotechnology) areas in terms of papers, patents, and commercializations, and found ways to improve the efficiencies of national R&D investments for each NT area. This is in response to huge R&D investments government has made recently in NT areas. Here, we collected data on investments, papers, patents, and commercializations for the R&D projects in NT areas through National Science & Technology Information Service. Based on the data, we analyzed the investment and performances (papers, patents, and commercializations) for each NT area, calculated the efficiency for each NT area, and compared the efficiencies between NT areas. Next, using cluster analysis, we identified several NT areas with similar characteristics in terms of paper efficiency, patent efficiency and commercialization efficiency. Finally, we derived implications for the efficiency enhancement for each grouping. The cluster analysis showed that there could be two groups, one being low in terms of technological outcome (papers and patents) efficiencies and high in terms of commercialization efficiencies, while the other being high in terms of technological outcome (papers and patents) efficiencies and low in terms of commercialization efficiencies. Therefore, the strategy for one group calls for support for technology transfer or technology introduction from other R&D performers and grant of guidance for improving R&D performers’ commercialization ability to other R&D performers while the strategy for the other group calls for R&D support for transfer of technology to other R&D performers, activation of technology transfer and support for commercialization of R&D performers.
정효석,김재신,소형석,소승영,소양섭 대한건축학회 1999 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.19 No.2
The paper presents results of an investigation on the permeability characteristics of concrete containing different levels of fly ash to partially replace ordinary Portland cement. The total cementitious content was 351㎏/㎥, and the water/cementitious materials ratio was 0.55. The porosity and pore structure of representative pastes of the matrix were measured using mercury intrusion porosimetry, and the permeability characteristics of these concrete were also determined by water and air permeability, chloride ion penetration. The results showed that concrete containing fly ash were able to significantly reduced the water and air permeability of concrete, And, results of the rapid permeability test slowed that the resistance of concrete to the penetration of chloride ions increases significantly as a contents of fly ash is increased. It appears that the presence of fly ash promotes the formation of a discontinuous macro-pore system which inhibits flow. Considering the significance of permeability characteristics in deciding concrete durability and the broad use of admixture materials in concrete is available.
문경주,고대형,김재신,소양섭 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2
The purpose of this study is to evaluate the qualities of the lightweight aggregate which is made by two kinds of the extrusion type and disk type pelletizer. The surface of the aggregate made by the disk type is also coated with AI₂O₃, and fly ash with the view to manufacturing the light-weight aggregate that specific gravity is lower than 1.0. As the result of test, it was possible to make light-weight aggregate that specific gravity was ranged about 0.6 to 1.4. Also, it's qualities are suitable as lightweight aggregates for non structural or structural concrete.