http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
농도구배와 평균속도가 삼지화염의 부상 특성에 미치는 영향에 관한 실험적 연구
서정일,김남일,오광철,신현동,Seo, Jeong-Il,Kim, Nam-Il,Oh, Kwang-Chul,Shin, Hyun-Dong 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.8
A triple flame in a mixing layer was studied experimentally with concentration gradient and mean velocity by using a multi-slot burner, which can stabilize the lift-off flame. Flame stabilization condition, lift-off heights, and some other characteristics were examined for methane and propane flame within a range of very low concentration gradient. Pitot-tube and LDV(Laser Doppler Velocimetry) were used for velocity. Mass spectroscopy and Rayleigh scattering signal were used for concentration gradients. Thermo-couples and SiC TFP(Thin Filament Pyrometer) were used for temperature. It was found that minimum values of the lift-off heights exist at a certain concentration gradient for constant mean velocity and this means that the propagation velocity has a maximum value. The scales of flame to the burner nozzle and intensity variation of the diffusion flame were suspected as the cause.
서정일,강경옥,Seo, Jeong-Il,Kang, Kyeong-Ok 한국음향학회 2009 韓國音響學會誌 Vol.28 No.7
본 논문에서는 초고선명 방송 (UHDTV)에서의 고품질 실감 오디오를 재현하기 위한 오디오 신호규격 및 멀티채널 오디오 재생시스템 형상, 멀티채널 오디오 부호화 기법에 대한 기술개발 동향, 표준화 현황, 문제점에 대해서 살펴보고 국내의 방송 및 통신 환경에 적절한 해결 방안을 제시한다. In this paper, we describe technical trends, standard activities, and upcoming issues relating on UHDTV audio, which requires high quality realistic sound. We also propose a proper solution to it for domestic broadcasting and telecommunication environments.
서정일,Seo, Jeong-Il 한국건축역사학회 2014 건축역사연구 Vol.23 No.3
This paper discusses Leon Battista Alberti's vision of the paradigmatic city. In his De re aedificatoria, Alberti proposes how the architecture of both individual buildings and cities should be ordered and embellished. Borrowing ideas from the ancient writers on one hand, and reflecting on actual urban reality on the other, Alberti proposes an ideal city where the sacred and the secular come together in hierarchical harmony, beautified under the principle of ornament. In Book VIII, dealing with secular public works of architecture, he writes about the composition of a new humanist city that transcends actual reality. Ornament, a central idea of his aesthetics, supports his conception of the paradigmatic city.
Fe(NO<sub>3</sub>)<sub>3</sub> 수용액의 농도와 침지시간에 따른 지르코니아의 색상 및 특성 변화
서정일,박원욱,고재숙,Seo, Jeong Il,Park, Won Uk,Go, Jae-Sook 대한치과기공학회 2016 대한치과기공학회지 Vol.38 No.4
Purpose: The increased aesthetic requirements and demands of patients have resulted in the developments of coloring liquid for zirconia. Methods: In this study, zirconia block was dipped into $Fe(NO_3)_3$solution, which showed a color and then concentration of $Fe(NO_3)_3$and zirconia's color and physical properties depending on the dipping time were observed and compared with exclusive coloring solutions. As the result, the following conclusions were obtained. Results: When compared with the specimens that were colored using exclusive solutions, $L^*$ value rose overall depending on the concentration of $Fe(NO_3)_3$and $a^*$ value was red in the form of (+) in all the specimens. Also, $b^*$ value was in the form of (+) at 0.5 to $1{\ss}fl$, but was in the form of (-) at 1.5 to $2{\ss}fl$. The dipping time did not highly influence $L^*$ value, but $a^*$ value and $b^*$ value were directly opposite to the specimens, which were not colored, except the sample that was dipped for only 2 seconds. When compared with exclusive coloring solutions, $Fe(NO_3)_3$had the most similar color at 0.5 to $1{\ss}fl$ and the longer the coloring time, the higher the rate of color change became. In relation to the density change depending on the addition of $Fe(NO_3)_3$, there was the lowest density at $2{\ss}fl$ and the density was increased in the specimens that were not colored. Conclusion: These results show that $Fe(NO_3)_3$solution can be used to make colored zirconia. It is expected that newly made colored zirconia can be used in clinical practice because the colored zirconia not only possesses the mechanical properties that all ceramic core material should have but also was biocompatible to a living cells.
특집 - 당뇨인이 특히 조심해야 할 합병증 - 당뇨병환자의 감염과 간암 -
서정일,Seo, Jeong-Il 사단법인 한국당뇨협회 2008 당뇨 Vol.220 No.-
당뇨병이 심장질환이나 중풍을 일으킬 위험이 높다는 것은 잘 알려져 있지만, 간염, 간경변 및 간암 등의 간질환 발생을 높일 수 있다는 위험성에 대해서는 잘 모르고 있다. 당뇨병이 간질환의 발생을 높이고 거꾸로 간질환이 당뇨병 발생을 높인다.