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악골 낭종의 적출술 후 골재생에 대한 파노라마 촬영과 컴퓨터 단층촬영의 비교 분석
김택성(Taek-Sung Kim),이재훈(Jae-Hoon Lee) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.2
Introduction: A cyst is a closed pathologic sac containing fluid or semi-solid material in central region. The most common conventional treatment for a cyst is enucleation. It was reported that spontaneous bone healing could be accomplished without bone grafting. We are trying to evaluate bone reconstruction ability by analyzing panorama radiograph and computed tomography (CT) scan with retrograde studying after cyst enucleation. In this way we are estimating critical size defect for spontaneous healing without bone graft. Materials and Methods: The study comprised of 45 patients who were diagnosed as cysts and implemented enucleation treatment without bone graft. After radiograph photo taking ante and post surgery for 6, 12, 18, 24 months, the healing surface and volumetric changes were calculated. Results: 1. Spontaneous bone healing was accomplished clinically satisfying 12 months later after surgery. But analyzing CT scan, defect volume changes indicate 79.24% which imply incomplete bone healing of defect area. 2. Comparing volume changes of defect area of CT scan, there are statistical significance between under 5,000 mm3 and over 5,000 mm3. The defect volume of 5,000 mm3 shows 2.79×1.91 cm in panoramic view. Conclusion: Bone defects, which are determined by a healed section using a panoramic view, compared to CT scans which do not show up. Also we can estimate the critical size of defects for complete healing.
김대식(Kim Dae-Sik),김택성(Kim Teak-Sung),이강렬(Lee Gang-Ryeol) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
We will propose the fuel reduction plans for diesel locomotive; on one hand by reducing the waste of idle fuel which is used for the protection of engine assembly, and on the other hand by improving the driving habit. For this, it's necessary to analyse the amount used of fuel in accordance with the drive pattern and the fuel consumption per trains. For Korail, to improve their management, the fuel reduction is an urgent problem, and many studies are in progress for it. We transform the diesel locomotive to electric locomotive for the fuel reduction . But it's not possible to quit completely the diesel locomotive operating because of the freight transportation and the special South-North relationship. So it is the key how to manage the diesel locomotive more efficiently and more economically.
손경소(Kyoung-So SON),김대식(Dae-Sik KIM),김호순(Ho-Soon KIM),김택성(Teak-Sung KIM),박태기(Tae-Gi PARK) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
It is very often for the experienced diesel locomotive drivers to identify the proper replacing time for the fuel adjustment tube only based on their experience. Because of that sometimes the locomotive's fuel is burned out due to the unnecessary torque. Or sometimes the locomotive does not operate with its accelerating performance because the fuel is not supplied at the appropriate moment. Meanwhile recent typical auto vehicles provide drivers with the average fuel efficiency and the instant fuel efficiency in real-time. By providing the real time display mentioned above it is one of the good examples that those drivers who had driven their cars not properly and used a lot of fuel with their bad driving habits obtain the efficient driving pattern by continuous educating effect. Similarly if the diesel locomotive provides the train driver with the optimal driving pattern within a certain driving section it will be effective for fuel saving. It is possible to make the most effective driving pattern by performing the repeated trial running especially for the railway because the track's operating routes its grades and etc are relatively precise. This research analyzes the result data which was obtained by many times trial running on the identical section after equipping the fuel use measuring device to a certain test vehicle and confirms the fuel saving effect depending on the driving pattern along the test section. At the same time the research to establish the optimal driving pattern was progressed.
인쇄 / 소결 방법에 의한 CdS 광전도 셀 제작과 특성
정태수,김택성,정철훈,이훈,신영진,홍광준,유평렬 ( Tae Soo Jeong,Taek Sung Kim,Cheol Hoon Jeong,Hoon Lee,Yeong Jin Shin,Kwang Joon Hong,Pyeong Yeol Yu ) 한국센서학회 1998 센서학회지 Vol.7 No.5
We fabricated a photoconductive cell made of polycrystalline CdS thick film which has high photo-sensitivity using a print/sintering method. The resultant grain size is about 4 ㎛. When CuCl₂ of 0.06 to 0.12 mg is added, the sensitivity and the ratio of photocurrent to dark current are 0.8 and 10³, respectively. The response wavelength is 511 nm. The rise and decay response times are 50 and 20 ms, respectively. In addition, the maximum power dissipation is beyond 80 mW. We noticed that the addition of CuCl₂ between 0.06 and 0.12 mg to 1g of CdS results in a reliable formation of photoconductive sensor.