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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.
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.
백만종,김형묵,이인성,선경,김광택,김학제,Baek, Man-Jong,Kim, Hyoung-Mook,Lee, In-Sung,Sun, Kyung,Kim, Kwang-Taik,Kim, Hark-Jei 대한흉부심장혈관외과학회 1999 Journal of Chest Surgery (J Chest Surg) Vol.32 No.1
승모판의 기계판막치환술 후 판막이나 좌심방 내 혈전증은 판막 기능장애나 혈전색전증을 일으킨다. 조기 진단과 적절한 치료는 중요하지만 임상에서 쉽지 않다. 혈전용해 치료는 혈전증으로 인한 재수술의 위험성을 줄일 수 있어 혈전증 치료에 적절한 한 방법이 될 수 있다. 본 보고는 저분자량 헤파린과 와파린으로 혈전용해 치료를 한 3명의 환자를 보고하고자 하였다. 한 명의 임산부를 포함한 2명의 환자는 판막 혈전증으로 인한 판막폐쇄와 개폐운동 장애가 있었고 다른 한 명은 내원 5일전 혈전색전증으로 뇌경색이 발생한 좌심방내 혈전증 환자였다. 환자들은 프락시파린 0.3cc (7,500 ICU AXa)을 하루에 2∼3번씩 피하로 투여하여 치료를 받았다. 퇴원 당시 판막과 좌심방 내 혈전은 완전히 혹은 거의 완전히 용해되었고 판막의 개폐운동은 정상이었다. 혈전용해 때부터 외래 추적 기간동안 특별한 부작용은 없었다. Thrombosis in valve or left atrium after mechanical mitral valve replacement causes prosthetic valve dysfunction or thromboembolism. Early and adequate therapy is very important but clinically not easy. Thrombolysis can avoid reoperation-related risks and act as an optimal therapy for prosthetic valve thrombosis. This report describes three patients who were treated by using low molecular weight heparin (LMWH) and wafarin. Two patients, including one pregnant woman, had prosthetic valve thrombosis and immobility of valve leaflets, and one patient with recent cerebral infarction due to thromboembolism had thrombus in left atrium. Fraxiparine 0.3 cc (7,500 ICU AXa) was administrated subcutaneously twice or triple daily. At discharge, thrombosis in valve and left atrium were completely or near totally lysed and valve leaflets were normally mobile. During the period of thrombolysis and follow up, there were no complications in all patients.