http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
몽골 울란바타르시 대기오염 저감을 위한 난방방식개선에 관한 연구
김봉섭 한국자원공학회 2008 한국자원공학회지 Vol.45 No.5
This study aims to analyze an air pollution levels in Ulaanbaatar City and to search for a realistic way to solve this problem. Mongolia in recent years has been suffered from increasing pollution due to industrial growth. Moreover, it's limited technologies concerning fuel production like poor combustion technology and low quality coal also causes atmospheric pollution seriously. Winter pollution by using heaters, especially, is crisis level and this problem now touches on resident's standard of living in this area. Ulaanbaatar is a city that is home to nearly 1.2 million people and a half of them live in “Ger” that is traditional mongolian house. Most people living in ger could not move to a city and built a slum. They use poor material, such as brown coal, lump coal, firewood and used tire for fuel because they cannot access heating system being provided by government. Most of them are exposed to air pollution and children, particularly, are more weaker than adults. Actually, the number of child patients who have a respiratory disease is increasing rapidly. Improvements in heating system and coal production will be help to reduce air pollutants in Ulaanbaatar. At this point in time, Korean briquettes are acceptable flues for Mongolia's economical and social condition and Korea is suitable for an advisor because it have industrial know-how and developed technology related to production and employment of briquettes. This project will contribute to improve in neighbor’s quality of life. This study will analyze local briquette’s production and quality and seek a method that relieves air pollution in Ulaanbaatar.
김봉섭,정현갑,김인근,Kim, Bong-Seop,Jeong, Hyeon-Gap,Kim, In-Geun 한국기계연구원 1994 硏究論文集 Vol.24 No.-
In this paper, the experimental unit of the cross inductive radio line and two linear induction motors driven by IGBT inverter for train control was made. In actual condition, the track has straight line, but so as to be able to achieve in small space, the unit prepared was shaped into two circular plates. Then by detecting inductive signal, the position data could be obtained. Also the equipment representing speed and thrust of LIM and train position by means of the experimantal unit could be composed.
나노인덴테이션 주사탐침현미경에 의한 다이아몬드성 탄소 박막의 특성 분석
김봉섭,오영우,윤존도 경남대학교 신소재연구소 2001 신소재연구 Vol.13 No.-
나노인덴테이션(Nanoindentation) 방법에 의한 박막재료의 기계적 특성을 평가하기 위하여, 용융석영과 (111)n형 실리콘웨이퍼를 이용하여 탄성계수와 경도를 측정하고, 그 값을 문헌 상의 값과 비교하였다. 용융석영은 2%, (111)n형 실리콘웨이퍼는 10%범위 내에서 잘 일치하였다. 이온빔증착법으로 제조된 400∼500nm의 두께를 가지는 DLC 박막을 40∼50nm 깊이로 압입 시험을 실시하였다. 그 결과 5가지 박막 중에서, 중착가스로 벤젠만 사용하고 바이어스 전압을 0∼-50V로 하여 제조한 박막의 탄성계수와 경도가 132GPa과 18GPa로 가장 높게 나타났다. 주사탐침현미경을 이용하여 표면 거칠기를 측정한 결과 순수그룹의 표면 거칠기는 0.25nm이하로 매우 평탄한 표면을 가지고 있었지만, 실리콘그룹은 1.17nm에서 2.60nm로 실란이 첨가된 모든 시편에서 물결무늬 모양이 관찰되었으며, 표면 거칠기가 증가하였다. In order for the characterization of mechanical properties of thin film materials, the hardness and elastic modulus of fused-quartz and (111)n type silicon safer was measured by nanoindentation. The results are compared with the value of reference. The measured hardness and elastic modulus was within 2% of fused-quartz and 10% of (111)n type silicon wafer. Ion beam deposited DLC thin films, with a thickness of 400∼500nm were indented in a depth range of 40∼50nm by nanoindentation. The results showed that DLC thin film using benzene and bias voltage 0∼-50V has elastic modulus and hardness value of 132GPa and 18GPa. Surface roughness of DLC thin films was measured by scanning probe microscope. The results showed that pure group had a very low roughness within 0.25nm and the roughness of silicon group was within 1.17 and 2.60nm. All of silicon doped samples showed wavy surface.
5 ' 5 ' - dithiobis ( 2 - nitrobenzoic acid ) 에 의한 메탈로사이오닌 cystein 기의 분자 특징
김봉섭,권훈정,최명언,고은희 ( Bong Sub Kim,Hoon Jeong Kwon,Myung Un Choi,Eun Hie Koh ) 생화학분자생물학회 1987 BMB Reports Vol.20 No.3
In the previous study of the reaction of the cysteinyl groups of metallothionein (MT) with 5,5`-dithiobis(2-nitrobenzoic acid) (DTNB) (Korean Biochem. J. (1984) 17, 288-298), it was found that the DTNB titrable cysteinyl groups were markedly affected either by the presence of metal or by the changes of protein conformation. In order to clarify these phenomena, we prepared the a fragment (4-metal cluster) of MT-I and examined the DTNB reaction. The ratio of 1.7 was obtained as the DTNB titrable cysteinyl groups to the bound metal ions. Thus these data support the notion that only one type of cysteinyl groups may interact with DTNB, mainly simply coordinated cysteinyl groups. Furthermore, we investigated the effects of var ous disulfides on the DTNB reaction rates to explore the micro environment around the cysteinyl groups. Disulfides tested were cystamine, 2-hydroxyethyl disulfide, dimethyl disulfide, and 3,3`-dithiodipropanoic acid. The DTNB reaction rate of MT-I was enhanced by cystamine and 2-hydroxyethyl disulfide, but that of the α fragment was inhibited by both disulfides. Others had no effects on the DTNB reaction of MT. Therefore, the DTNB titrable cysteinyl groups of MT seem to be located in a hydrophilic and negatively charged microenvironment.