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김만종 대한금속재료학회(대한금속학회) 1963 대한금속·재료학회지 Vol.1 No.4
For the combustion of slack Korean anthracite, the fluidization method is best suited with no requirement for briquetting or pulverization. Outstanding difficulties arising from low combustion reactivities, unreasonably high combustibles in the ash, and the stack loss by the carry over and the nuisance due to fly ash have being eliminated by preheating the combustion air and slack coal, modification of the furnace and removal of the ash through clinker formation. This method will probably solve the gasification problem of the Korean anthracite powders through further development work.
H.264/SVC 비디오 재생기에서 사용자 인지 품질 고려한 CPU 전력 감소 기법
김만종,송민석 한국차세대컴퓨팅학회 2011 한국차세대컴퓨팅학회 논문지 Vol.7 No.3
H.264/SVC를 포함하는 SVC(scalable video coding) 기술은 단일 비디오 스트림에서 다수의 프레임 율을 지원할 수 있는 시간적 확장성을 제공한다. 본 논문에서는 이 기술을 H.264/SVC 동영상 재생을 위한 새로운 동적 전압조절 (dynamic voltage scaling) 기법을 위해 이용한다. 본 논문에서는 사용자에 의해 인지된 품질이 프레임 재생율에 의해 얼마나 영향을 받는지 산정하고, 제어 이론적 피드백을 사용하여 각각의 프레임을 디코딩 할 때 걸리는 시간을 예측한다. 이에 기반하여, 본 논문에서는 H.264/SVC의 디코딩을 지원하는 리눅스의 MPlayer에 이 기법을 구현을 하였으며, 실험을 통해서 최대 품질 비디오 재생 대비 약 15~19% 사이의 에너지를 절감할 수 있음을 확인 할 수 있었다. Scalable video coding (SVC) techniques, including H.264/SVC, allow temporal scalability that supports multiple frame-rates in a single video stream. We exploit this in a new dynamic voltage scaling (DVS) scheme for video playback. We assess how the perceived quality of a video depends on the frame-rate, and then predict the decoding time needed for each frame using control-theoretic feedback. We implemented this scheme in a Linux MPlayer that supports H.264/SVC decoding. Experimental results show that energy consumption is between 15% and 19% less than full-quality video playback.
김만종,이창용,하백현 ( Man Jong Kim,Chang Yong Lee,Baik Hyon Ha ) 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.5
Hydrogen mordenite and the modified mordenites of different silica/alumina ratio were impregnated by cupric and/or chromic salts, and redox-treated with hydrogen/oxygen at 500C and 750℃, respectively and used for catalytic decomposition of NO. Activity of NO decomposition increases with contents of copper and shows maximum at l0wt%. Catalytic activities for the samples treated in 750℃ are lower than that in 500℃ But the increase of silica/alumina by aluminum extraction and chromic addition to cupric salt for the impregnation improved the thermal crystal stability of mordenite which results in stabilized catalytic activity even for the samples pretreated at 750℃.
고려자기의 청자색영과 소성요내 (燒成窯內) 분위기와의 관계
김만종 대한금속재료학회(대한금속학회) 1963 대한금속·재료학회지 Vol.1 No.4
The artistic color texture of the Korean celadon is obtained by uniform reduction of 2-3% Fe₂O₃to FeO contained in the body and glaze material with strong and continuous reducing flame produced by the fire wood. Motley brown colors were evolved during unsuccessful firing from vagrance between oxidizing and reduction flame through the formation of color compounds with Fe₂O₃, Fe₃O₄and FeO color layers rather than from excessive reduction or concentration of the iron oxides in the raw material. Strong reducing flame obtained from the gasification combustion furnace using the Korean anthracite as the fuel served for the same purpose of satisfactory reduction of Fe₂O₃to FeO producing excellent celadon color.
김만종 대한금속재료학회(대한금속학회) 1963 대한금속·재료학회지 Vol.1 No.2
Slack coal has generally less value of utilization compared to lump coal. Although Korean anthracite is produced mostly in powder form, still about 30% could be recovered as small sizes, which are presently misused as power coal but could be far more profitably utilized as stoker fuel. The demand for synthesis gas material at the fertilizer plants is also growing thus necessitating the utilization of Korean anthracite small sizes. A test has been made to observe how Korean anthracite small sizes would burn in a small hand fired furnace in order to obtain combustion data for further trial in retort type stoker. General combustion characteristics are excellent, indicating favorable prospect as industrial fuel such as on chain grate stokers, retort stokers, and gas producers.