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신용수(Yong-su Shin),최형일(Hyung-il Choi),이도형(Dohyung Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Mixing between independent fluids is of significant importance in microfluidics applications. However, efficient mixing is hampered by comparatively slow molecular diffusion process at this micro-scale. In the present study, in order to enhance the mixing efficiency, the configuration of obstacles in the Y-channel micromixer is optimized using an approximate optimization technique. Before optimization, mixing characteristics is analyzed by an unstructured grid CFD simulation. The meta model of the mixer configurations is proposed using the analysis method and neural network theory. Sequential Quadratic Programming(SQP) method is applied to the optimization procedure. Through these procedures, the parameters of configuration such as the radii and locations of obstacles are optimized.
김영록,신용수,Kim, Young Rock,Shin, Yong-Su 한국수학사학회 2016 Journal for history of mathematics Vol.29 No.5
In tropical geometry, the sum of two numbers is defined as the minimum, and the multiplication as the sum. We learned that dynamic programming in tropical algebraic geometry can be used to find the shortest path in graphs. We have also learned about the Bezout's Theorem, which is a theorem concerning the intersections of tropical plane curves, and the stable intersection principle.
김영록,신용수,Kim, Young Rock,Shin, Yong-Su 한국수학사학회 2017 Journal for history of mathematics Vol.30 No.3
In tropical geometry, the sum of two numbers is defined as the minimum, and the multiplication as the sum. As a way to build tropical plane curves, we could use Newton polygons or amoebas. We study one method to convert the representation of an algebraic variety from an image of a rational map to the zero set of some multivariate polynomials. Mikhalkin proved that complex curves can be replaced by tropical curves, and induced a combination formula which counts the number of tropical curves in complex projective plane. In this paper, we present close examinations of this particular combination formula.
전자 학술지가 전문도서관 운영에 미치는 영향 분석 : KIST 사례를 중심으로
강대신,신용수,신말숙,윤혜정,Kang, Dae-Shin,Shin, Yong-Su,Shin, Mal-Suk,Yoon, Hyea-Jeong 한국과학기술정보연구원 과학기술정보센터 2003 Journal of Information Science Theory and Practice Vol.34 No.3
본 연구는 정부출연연구소인 한국과학기술연구원의 사례를 통해 전자 학술지가 전문도서관 운영 전반 즉, 예산, 정보 이용, 업무, 시설, 공간에 미치는 영향에 대해 조사 분석하였다. 이러한 분석을 통해 전문도서관 운영 측면에서 고려해야 할 요소들을 다음과 같이 제안하고 있다. 첫째, 전자 학술지 도입은 전문도서관 운영 전반에 영향을 미치기 때문에 직무별로 접근하지 말고 큰 틀에서 접근하여야 한다. 둘째, 현재 전자 학술지는 대부분 콘소시엄을 통해 구독하는 경우가 대부분이지만, 정보 제공 기관들과 정보 공유를 위한 협력망 구축 및 구독 방법을 다양화하여야 한다. 셋째, 전자 정보 운영 환경에 맞게 직무 분석을 통해 업무가 재설계되어야 한다. 넷째, 물리적 규모가 아닌 원하는 전자 정보를 이용할 수 있도록 서고 및 장비를 재구성 할 필요가 있다. 마지막으로, 전문도서관처럼 자료의 보존 보다는 시의 적절한 정보 활용을 중요시 하는 기관의 요구에 따른 사고의 전환이 필요하다. This case study analyzed how electronic journal subscription had an effect on special library management including budget, information behavior, library operations, facilities, space et al. in KIST. This study suggests the followings; 1) Since electronic journals has an effect on overall operations of special libraries, draw big pictures not by functions. 2) Though the most method for subscription is consortium, it is necessary to build cooperation network for information sharing and vary cost architecture of information use. 3) Through job analysis, redesign jobs. 4) Reconstruct stacks and facilities. 5) It is necessary paradigm shift that it is more important to use than preserve materials in the special libraries.
Y-채널 마이크로 믹서에서의 혼합 효율에 대한 LIF Confocal Microscope 측정
김경목(Kyoung-mok Kim),신용수(Yong-su Shin),이도형(Dohyung Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Mixing is one of important processes in biochemical microfluidics. In efficient micromixer design, it is essential to analyze flow pattern and evaluate mixing efficiency. In this paper, mixing efficiency for Y-channel micromixer is measured by fluorescence intensity using LIF(Laser Induced Fluorescence) Confocal Microscope. With polydimethylsiloxane(PDMS), the Y-channel micromixers are fabricated and those are bonded to glass plate through Plasma bonding. For measuring of fluorescence intensity by He/Ne laser, Nile Blue A is injected into the micromixer. For visualization of the flow pattern and dynamic image capturing, CAM Scope is used with Blue and red dye. Modified simple algorithm for incompressible flow equation is solved for the same geometry as in the experiment for the comparison with computer simulation. From the experiments and simulation, accurate mixing efficiency evaluation for Y-channel micromixer is established.
조각자(조角刺) 추출물(抽出物)이 정상 흰쥐의 뇌혈류(腦血流) 변화(變化)에 미치는 영향(影響)
김남욱 ( Nam Uk Kim ),조국령 ( Gook Ryung Cho ),임대웅 ( Dae Woong Lim ),신용수 ( Yong Su Shin ),김진성 ( Jin Sung Kim ),최진봉 ( Jin Bong Choi ),전상윤 ( Sang Yun Jeon ),홍석 ( Seok Hong ) 한방재활의학과학회 2009 한방재활의학과학회지 Vol.19 No.1
Objectives: This study was designed to investigate the effects of Gleditsiae spina(GS) on changes in cerebral blood flow in rats. Methods: The present study was investigated regional cerebral blood flow(rCBF) and mean arterial blod pressure(MABP) in rats. In addtion, the present study also investigated action mechanisms of GS on changes in rCBF and MABP by Pre-treatment with indomethacin(Idm) and methylene blue(MTB), an inhibitor of a vasodepressor material. Results: Treatment with GS elevated rCBF in dose-dependent manner, but MABP levels were not affected by treatment with GS. Pre-treatment with indomethacin(IDM), an inhibitor of cyclooxygenase, inhibited increase of rCBF induced by GS too, In addition, Pre-treatment with MTB inhibited increase of MABP too. But, Pre-treatment with IDM did not affect MABP levels. Conclusions: These results suggest that GS is effective to treat patient with disease related to cerebral ischemia, because GS can increase rCBF. In addition, the mechanisms are thought to be related to both of cyclooxygenase and guanylate cyclase pathways.
Strong F-Regularity over The Quotient Ring of C-M Local Ring
신용수 성화대학교 1993 成和論叢 Vol.- No.3
Commercial nano crystalline TiO_(2) powders were used to characterize photocatalyst, using thermal spray coating technique. The microstructure of coating layers were examined by SEM. FE-SEM and TEM. Also the cross sectional areas of TiO_(2) coating layers were observed by SEM. The phases were analyzed by X-ray diffraction method. Surface roughness and hardness were measured. It was found that phase transformation from anatase to rutile occurred, and the melted splats are all rutile, and unmeted nano particles were anatase. These unmelted anatase phase may enhance to play a role of photocatalyst.
Prime Ideals and Their Applications in Commutative Rings
Shin, Dong-Soo,Shin, Yong-Su 牧園大學校 1987 論文集 - 牧園大學校 Vol.12 No.-
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