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화학적인 용액 코팅방법에 의한 박막형 고온초전도체에 사용되는 SUS310 금속모재의 평탄화 연구
이종범,이현준,김병주,권병국,김선진,이종수,이철영,문승현,이희균,홍계원,Lee, J.B.,Lee, H.J.,Kim, B.J.,Kwon, B.K.,Kim, S.J.,Lee, J.S.,Lee, C.Y.,Moon, S.H.,Lee, H.G.,Hong, G.W. 한국초전도학회 2011 Progress in superconductivity Vol.12 No.2
The properties of $2^{nd}$ generation high temperature superconducting wire, coated conductor strongly depend on the quality of superconducting oxide layer and property of metal substrate is one of the most important factors affecting the quality of coated conductor. Good mechanical and chemical stability at high temperature are required to maintain the initial integrity during the various process steps required to deposit several layers consisting coated conductor. And substrate need to be nonmagnetic to reduce magnetization loss for ac application. Hastelloy and stainless steel are the most suitable alloys for metal substrate. One of the obstacles in using stainless steel as substrate for coated conductor is its difficulties in making smooth surface inevitable for depositing good IBAD layer. Conventional method involves several steps such as electro polishing, deposition of $Al_2O_3$ and $Y_2O_3$ before IBAD process. Chemical solution deposition method can simplify those steps into one step process having uniformity in large area. In this research, we tried to improve the surface roughness of stainless steel(SUS310). The precursor coating solution was synthesized by using yttrium complex. The viscosity of coating solution and heat treatment condition were optimized for smooth surface. A smooth amorphous $Y_2O_3$ thin film suitable for IBAD process was coated on SUS310 tape. The surface roughness was improved from 40nm to 1.8 nm by 4 coatings. The IBAD-MgO layer deposited on prepared substrate showed good in plane alignment(${\Delta}{\phi}$) of $6.2^{\circ}$.
전자빔 증발법에 의한 박막형 고온초전도체의 $CeO_2$ 버퍼층 증착 연구
이종범,박신근,김혜진,문승현,이희균,홍계원,Lee, J.B.,Park, S.K.,Kim, H.J.,Moon, S.H.,Lee, H.G.,Hong, G.W. 한국초전도학회 2010 Progress in superconductivity Vol.11 No.2
The properties of buffer layer for thermal and chemical stability in coated conductor is a very important issue. $CeO_2$ has desirable thermal and chemical stability as well as good lattice match. In this study, $CeO_2$ was deposited by electron beam deposition. The MgO(001) single crystal and LMO buffered IBAD substrate(LMO/IBAD-MgO/$Y_2O_3/Al_2O_3$/Hastelloy) were used as substrates, which have $\Delta\phi$ values of ${\sim}8.9^{\circ}$. The epitaxial $CeO_2$ films was deposited with high deposition rate of $12{\sim}16\;{\AA}/sec$. During deposition, the change of oxygen partial pressure(${\rho}O_2$) does not cause change in c-axis texture. In case of $CeO_2$ on MgO single crystal, the substrate temperature was optimized at $750^{\circ}C$ with superior $\Delta\phi$ and $\Delta\omega$ value. Otherwise, In case of LMO buffered IBAD substrate, It was optimized at $650^{\circ}C$ with increasing its deposition thickness of $CeO_2$, which was finally obtained with best $\Delta\phi$ value of $5.5^{\circ}$, $\Delta\omega$ value of $2^{\circ}$ and Ra value of 2.2 nm.
파종시기에 따른 미백2호 찰옥수수 품종의 생육 및 이삭 특성 변화
허태현 ( Heo T. H. ),최여진 ( Y. J. Choi ),사승진 ( S. J. Sa ),강호원 ( H. W. Kang ),김서영 ( S. Y. Kim ),이현빈 ( H. B. Lee ),박상익 ( S. I. Park ),이종범 ( J. B. Lee ),이재이 ( J. Lee ),이주경 ( J. K. Lee ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2017 강원 농업생명환경연구 Vol.29 No.3
본 연구는 파종시기에 따른 미백2호 찰옥수수 품종의 생육 특성 변화를 관찰하기 위하여 4월 중순부터 5월 중순까지 2주 간격으로 3회 종자를 분산 파종한 후 각 처리구별로 개체들에 대한 생육특성을 조사하였다. 출아일수의 경우 1차 파종(4월 19일)에서는 파종 후 12일째인 5월 1일에 50% 이상의 개체들이 출아를 하였으며, 2차 파종(5월 10일)에서는 파종 후 7일째인 5월 17일에 50% 이상의 개체들이 출아를 하였고, 3차 파종(5월 24일)에서는 파종 후 6일째인 5월 30일에 50% 이상의 개체들이 출아를 하였다. 옥수수 수염의 출사기는 4월 19일에 파종한 1차 처리구에서는 6월 29일에 50% 이상의 개체들이 출사를 하였으며, 5월 10일에 파종한 2차 처리구에서는 7월 14일에 50% 이상의 개체들이 출사를 하였으며, 그리고 5월 24일에 파종한 3차 처리구에서는 7월 27일에 50% 이상의 개체들이 출사를 하였다. 초장의 경우 1차 파종 처리구에서는 최소 185 cm에서 최대 210 cm로 평균 200 cm를 나타내었고, 2차 파종 처리구는 최소 196 cm에서 최대 233 cm로 평균 212 cm를 나타내었고, 그리고 3차 파종 처리에서는 최소 215 cm에서 최대 241cm로 평균 232 cm를 나타내었다. 이삭장의 경우 1차 처리구에서는 평균 20 cm를 2차 처리구에서는 평균 19.6 cm, 그리고 3차 처리구에서는 평균 19 cm를 각각 나타내었다. 백립중의 경우는 1차 처리구에서 평균 36.4 g을 2차 처리구에서 평균 35.3 g을 그리고 3차 처리구에서 평균 35.0 g을 각각 나타내었다. 이상의 결과에 의하면 종실 수량과 관련된 형질들의 경우는 가급적 파종시기를 빨리하여 생육기간을 충분히 확보해 주는 것이 옥수수 이삭의 생산성에 더 유리한 것으로 나타났다. In order to observe the effects of sowing date on the ‘Mibaek 2’ waxy corn cultivar, we investigated the morphological traits of individuals under early, mid, and late sowing conditions. The budding of early (April 19th), mid (May 10th), and late (May 24th) sown plants was observed at 12 d, 7 d, and 6 d after sowing, respectively. The silking of early, mid, and late sown plants was observed on June 29th, July 14th, and July 27th, respectively. Most of the early-sown plants had an average height of 200 cm, with a minimum of 185 cm and a maximum of 210 cm, while mid-sown plants had a mean height of 212 cm with a minimum of 196 cm and a maximum of 233 cm. The average height of late-sown plants was 232 cm, with a minimum of 215 cm and a maximum of 241 cm. The longest ear length and the highest value of 100-kernel weight were observed in early-sown plants compared to mid-and late-sown plants. Our findings suggest that it is more advantageous to sow the ‘Mibaek 2’ waxy corn cultivar as early as possible to obtain the highest productivity.
이종범(J. B. Lee),박찬국(박찬국) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
While the car is driving, to maintain reasonable temperature in engine is very important problem in that not only maintain the steady combustion state, but also prevent engine from increasing of lubricating oil consumption, deteriorating of lubricating oil, shortening of life time, deforming of material strength. and so on. 111is research divides radiator with elements and energy balance equation is used to analyze the each element Data of engine radiant heat experiment and car cooling tunnel experiment is adapted to program for calculation of radiator outlet temperature, and this result is compared with outlet temperature of cooling tunnel experiment result.<br/> As a result, radiator outlet temperature agrees numerical analysis data with experiment data. then this simulation program is able to adapt development of cooling system<br/>
이종범(J. B. Lee),조상훈(S. H. Cho),민병찬(B. C. Min),홍두영(D. Y. Hong),이원주(W. J. Lee) 한국신뢰성학회 2011 한국신뢰성학회 학술대회논문집 Vol.2011 No.6
The failure of LCC analysis is recognized as a serious risk for companies in fast-paced business environment. LCC analysis has been mentioned and analyzed only in accounting perspectives, but recently engineering perspectives of LCC analysis based on the execution of appropriate procedures become more important than the accounting perspectives. Especially, the practical use of reliability engineering related methodologies is recognized as a key factor for the LCC analysis. For the practical use of reliability methods, LCC analysis for unexposed problems is a key issue, and utilizing FMEA and FTA techniques is needed to solve the unexposed problems. Reliability, maintainability, availability, and safety should be evaluated by the LCC analysis with the reliability methods, so we study methodologies for the LCC analysis. Present Worth can be calculated by multiplication of Annual Equivalent Cost and PWAF. Reliability engineering related methods are needed for the process of dividing Present Worth into PWAF, and the practical use of reliability methods can improve accuracy of LCC analysis.