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The Optimal Design of 600 kJ SMES Magnet Based on Stress and Magnetic Field Analysis
Sangyeop Kwak,Myungjin Park,Wooseok Kim,Seungyong Hahn,Seungwook Lee,Jikwang Lee,Kyeongdal Choi,Jinho Han,Joonhan Bae,Seokho Kim,Kiduk Sim,Haejong Kim,Kichul Seong,Hyunkyo Jung,Songyop Hahn IEEE 2008 IEEE transactions on applied superconductivity Vol.18 No.2
<P>In the development of large scale superconducting magnetic energy storage (SMES) systems, the problem of mechanical stresses induced in the windings by Lorentz force becomes more critical as dimensions of system and magnetic field increase. In this paper, an optimal design process of a 600 kJ SMES magnet combined with mechanical stress analysis is presented. A stress analysis method based on electromagnetic finite element analysis (FEA) is explained in detail. The results of the analysis led to the development of an optimum design, electro-magnetically and mechanically, of a single-pole double pancake coil (DPC) type 600 kJ SMES magnet. The stress in each DPC are described along with recommendations for winding tension in the manufacturing process to minimize radial and hoop stress in each DPC.</P>
Conceptual Design of HTS Magnet for a 5 MJ Class SMES
Myungjin Park,Sangyeop Kwak,Wooseok Kim,Jikwang Lee,Jinho Han,Kyeongdal Choi,Hyunkyo Jung,Joonhan Bae,Seokho Kim,Kiduk Sim,Haejong Kim,Kichul Seong,Songyop Hanh IEEE 2008 IEEE transactions on applied superconductivity Vol.18 No.2
<P>Superconducting magnetic energy storage (SMES) systems with High Temperature Superconducting (HTS) wires have been actively developed world-wide. A 600 kJ class SMES with Bi-2223 HTS wire has been in development as a national project since 2004 and is currently approaching the final testing stage of the first of three phases. In the second phase of the project, several MJ class HTS SMES will be developed. In this paper, designs of magnets for 5 MJ class SMES with DI-BSSCO and YBCO coated conductor are presented and compared.</P>
SERS imaging of HER2-overexpressed MCF7 cells using antibody-conjugated gold nanorods
Park, Hyejin,Lee, Sangyeop,Chen, Lingxin,Lee, Eun Kyu,Shin, Soon Young,Lee, Young Han,Son, Sang Wook,Oh, Chil Hwan,Song, Joon Myong,Kang, Seong Ho,Choo, Jaebum Royal Society of Chemistry 2009 Physical chemistry chemical physics Vol.11 No.34
<P>Antibody-conjugated gold nanorods (GNRs) have been used for the targeting and imaging of specific cancer markers expressed on the surface membrane of cancer cells. GNRs with various aspect ratios were fabricated, and their surface-enhanced Raman scattering enhancement effects were evaluated. To attach the GNRs selectively onto the targets in cancer cells, specific antibodies were immobilized on the surface of GNRs using the layer-by-layer deposition method. First, Raman reporter molecules, mercaptopyridine, were attached to the surface of GNRs, and their surface charge was modified using poly(sodium 4-styrene-sulfonate) to make the surface charge negative. Then, anti-rabbit IgGs were immobilized onto the surface of the GNRs by electrostatic interactions. HER2 markers, expressed on the cell surface, were treated with anti-HER2 primary antibodies. Finally, the functionalized nanoprobes, conjugated with secondary antibodies, were attached to the markers on cancer cells by antibody–antibody interactions. In the present study, MCF7 cells overexpressing breast cancer marker HER2 were used as the optical imaging targets. Our experimental results demonstrate the potential feasibility of antibody-conjugated GNRs for the highly sensitive targeting and imaging of biomarkers expressed on the surface membrane of cancer cells.</P> <P>Graphic Abstract</P><P>We report the application of antibody-conjugated gold nanorods for the targeting and imaging of biomarkers expressed on cancer cells. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b904592a'> </P>
문형경(HyoungKyung Mun),한상엽(SangYeop Han),홍문근(MoonGeun Hong) 한국추진공학회 2018 한국추진공학회 학술대회논문집 Vol.2018 No.5
발사체는 매우 복잡한 시스템으로서 이러한 발사체의 개발은 사전준비, 설계, 제작, 시험 등 단계적으로 개발이 진행되어야 하며 목표하는 임무를 수행하기 위한 최적의 발사체 개발을 위해서는 수많은 시행착오와 기술의 접목이 요구된다. 이러한 발사체의 개발 난이도는 개발 초기 발사체 개념설계의 품질에 크게 좌우된다. 본 논문에는 발사체 개념설계 과정과 개발 방법론 연구에 대해 소개하고자 한다. 또한, 개념설계 개발 방법론을 검증하기 위해 한국형발사체 모델을 선정하였으며 성능을 비교 및 검토하였다. 이를 통해 같은 방법으로 다른 발사체의 개념설계 분석에 적용하여 비행성능을 예측할 수 있을 것으로 기대한다. Launch vehicle is very complicated system. The development of such a launch vehicle should be processed step by step on preparation, design, manufacturing, and testing. The optimized development of launch vehicle to accomplish the target mission requires lots of trials and errors and technologies. The difficulty of the development of launch vehicle largely depends on the quality of conceptual design of launch vehicle at the early stage of development. This paper introduces the procedure of conceptual design of launch vehicle and its strategy. In addition, to verify the method of conceptual design, the data from KSLV-II SLV are used for the comparison and review. Authors anticipate that the method shown in this paper can estimate the flight performances of other launch vehicles by applying it to the analysis of conceptual design.