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이춘미(Lee Choun-Mi),김주영(Kim Ju-Young),홍원화(Hong Won-Hwa) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
For the last half a century, Korea has been experienced rapid economic growth and industrialization development. however they cause serious problems that environment pollution and energy shortage are appeared, and the biggest problem that we are now confronted are required solutions through allover the world. Now, Korea's energy consumption is the 10th in the whole world, Among them, energy for buildings, about 25% in the whole Energy which spend in Korea, is very serious. Especially, the energy consumption of school buildings which have heating & cooling system according to improvements of educational environment are rapidly increasing. These features are explicit III the University, Because it has lots of colleges and facilities for lecture, experiment, and research. Especially, electric power consumption account for 75 percent of energy consumption in educational institutions. Accordingly, it is important to understand and analyze the pattern of electricity energy consumption which is used. This study attempts to appoint the place which is one of university and to investigate the characteristics of energy consumption like electricity, gas, oil.
이춘미(Chunmei Li),송호성(Hosung Song),맹성호(Sungho Maeng),허인호(Inho Hur) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
The automatic transmission is composed by many rotating parts transmitting a driving force. Heat is generated by the friction between the rotating parts, and the function of the parts can be degraded due to the heat. Therefore, adequate lubricating oil (oversupply= power losses, undersupply= lack of lubrication) is needed for the friction parts. The amount of lubricating oil is decided by the shape of lubrication flow and lubricant properties and quantity of lubricating oil. For the adequate amount of the lubricating oil without trial and error, lubrication design method should be developed that can consider the above factors. In this study, CFD is used for the lubrication design method to analyze and reflect the above factors, and the result is equivalent to the experiment. In the future, it is expected to be optimization of the lubrication flow design by using this method.
국내산 곡물과 장내개선 효과 규명을 통한 synbiotic 소재 개발 및 산업화
김동균, 권오성, 정준영, 이춘미, 김광엽 충북대학교 농업과학기술연구소 2020 農業科學硏究 Vol.36 No.1
The purpose of this study was to select the lactic acid bacteria (LAB) through acid resistance,???? bile salt resistance ,heat resistance, organic acid production and examine the LAB to attach to grains, ability of fermentation conditions. Confocal scanning laser microscopy (CLSM) was used to confirm the adhesion of grains and Lactobacillus spp. The selected strains were fermented in corn extract to confirm the optinum ratio of carbon and nitrogen source. The optimum ratio was applied to the mixed grain extracts to examine the growth curve and organic acid production. After fermentation activity, antioxidant of mixed grain extracts were measured. As results, Lactobacillus salivarius CFM 22 and Lactobacillus plantarum CFM 23 showed the highest potential as LAB. The selected strains were observed to adhesion to grains through CLSM. When the optimum conditions of fermentation obtained from the corn extract were applied to the mixed grain extracts, the growth curve and organic acid production were increased. After fermentation, antioxidant level in mixed grain extracts was increased. As results, we could confirm the possibility of the selected strains and grains as synbiotic food material.
검진 기관에서의 선별 유방촬영술 시행에 따른 연령 제한의 필요성에 대한 연구
윤하얀,이춘미,안의경,김용환,Yun, Ha-Yan,Lee, Choon-Mi,Ahn, Ui-Kyeong,Kim, Yong-Hwan 대한디지털의료영상학회 2010 대한디지털의료영상학회논문지 Vol.12 No.1
National Cancer Screening Project and Korean Society of Breast Imaging recommend that breast cancer screening should be performed on those aged 40 and above. Nevertheless, this recommendation is usually ignored by a number of medical institutions. The purpose of this study is to emphasize the necessity of an age limitation in screening mammography. Ten institutions were randomly selected and telephone inquiries about patients' age limitation and internal guidelines were set up. The 3,214 women, who underwent screening mammography through 'GE Senography 2000D' in each hospital, were classified into five groups according to age(from 20s to 40s, at intervals of 5). And then, collected data was analyzed by a radiologist in accordance with ACR-BIRADS(American College of Radiology Breast Imaging Reporting and Data System), through which breast parenchymal density and the results of analysis were categorized in order to predict the sensitivity of mammography. Information about craniocaudal-view mammograms was automatically produced by use of GE Senography 2000D, and the average glandular dose was retrospectively analyzed through the program 'Excel 2007.' Two institutions did not set the age limitation. Other seven institutions internally allowed those who wanted to receive mammography regardless of age. Approximately 99% of those aged 20 to 29 were judged as having the dense breast. In those aged 35 to 39, breast parenchymal density tended to be lower, but the fatty breast to increase. In the case of 'category-zero' that does not need additional tests, the rate of 'heterogeneously dense' and 'extremely dense' reached to 83.1% and 15.1% respectively. Regarding dense breasts, there was no sufficient information for image reading. The glandular dose, applied to 3,214, was 1.47mGy on the average. In those aged 20 to 24 who are sensitive to radiation, the average glandular dose indicated 1.59mGy. Those aged 35 and above showed the lowest value, 1.43mGy. In those aged 35 to 39, the breast tended to change from denseness to fattiness. The average glandular dose was lowest in those aged 35 and above, which suggests that screening mammography should be periodically performed on those aged 35 and above in order that breast cancer may be early detected. On the other hand, in those aged less than 35, it is difficult to analyze mammograms due to the high density of breast parenchyma, and also retakes become frequent. In particular, subjects may be exposed to excessive doses. Accordingly, it should be substituted by breast self-examination or clinical breast examination. In case of need, it is advisable to perform ultrasonography.