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Current Status of the KSTAR TF Superconducting Magnet Development
ByoungSu Lim,C. S. Kim,D. J. Kim,D. K. Lee,G. S. Lee,H. K. Park,I. S. Woo,J. S. Bak,J. Y. Choi,J.J. Joo,K. Pak,K. Kim,K. P. Kim,M. S. Ko,N. H. Song,S. Lee,S. J. An,W. Chung,W. W. Park,Y. J. Song 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The KSTAR (Korea Superconducting Tokamak Advanced Research) TF magnet system is a fully superconducting magnet system which consists of 16 TF coils. The TF coil system provides a field of 3.5 T at a plasma center, with a peak flux density at the TF coils of 7.5 T. The stored energy is 470 MJ. TF coils use a Nb3Sn superconducting strand with Incoloy alloy 908 (afterward, Incoloy 908) conduit. The Nb3Sn strand has KSTAR HP-III specifications in which the critical current density is greater than 750 A/mm2 at 12 T, 4.2 K. The nominal current of the TF coils is 35.2 kA with all coils in series. For the fabrication of CICC (Cable-In-Conduit Conductor), a continuous CICC jacketing system is developed, and the procedures of coil fabrication are established to develop the TF coil. The prototype TF coil and the TF 01 16 coils are fabricated for the KSTAR superconducting magnet system. The TF17 coil which will be used as a back up coil is under fabrication. The overall TF coil fabrication will be completed by the end of December 2005.=
Jacketing of CICC for KSTAR Superconducting Magnet System
ByoungSu Lim,C. S. Kim,D. J. Kim,D. K. Lee,G. S. Lee,H. K. Park,I, S Woo,J. S. Bak,J. Y. Choi,J.J. Joo,K. Pak,K. Kim,K. P. Kim,M. S. Ko,N. H. Song,S. I. Lee,S. J. An,W. Chung,W. W. Park,Y. J. Song 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The KSTAR (Korea Superconducting Tokamak Advanced Research) superconducting magnet system consists of 16 TF (Toroidal Field) and 14 PF (Poloidal Field) coils. Internally-cooled cabled superconductors will be used for the magnet system. The magnet system adopts a superconducting CICC (Cable-In-Conduit Conductor) type conductor. It uses two different types of CICCs, Nb3Sn cable with Incoloy alloy 908 (afterward, Incoloy 908) conduit and NbTi cable with 316LN stainlesssteel conduit. A continuous CICC jacketing system is developed for the CICC jacketing and it uses the tube-mill process which consists of forming, welding, sizing and squaring procedures. The cabling process for TF and PF superconducting cable and the fabrication process of each CICC (TF CICC and PF CICC) are described. The welding of conduit materials is also discussed. The fabrication results including the geometrical specification will be discussed.
Rapid detection of viral RNA in honeybee using ultra-rapid qPCR and a DNA chip
Jung-Min Kim,Su-Jin Lim,SoMin Kim,MoonJung Kim,ByoungHee Kim,Truong A Tai,김선미,ByoungSu Yoon 대한수의학회 2020 Journal of Veterinary Science Vol.21 No.1
The emergence and prevalence of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) in livestock animals have become a worldwide public health concerns. While the prevalence and genetic profiles of MRSA strains in pigs and pork meat have been actively studied, livestock-associated MSSA strains have only been characterized in a few small-scale studies. In this investigation, we assessed the nationwide prevalence of MSSA in the Korean pig production chain, including pig farms, slaughterhouses, and retail markets. Among the 41 MSSA strains, the predominant clonal lineages were sequence type (ST) 398 (n = 15, 37%) and ST5 (n = 13, 32%). Although the overall prevalence of MSSA (2.58%) was low and mostly restricted to pig farms, ST398 MSSA strains showed higher level of multidrug resistance phenotype versus non-ST398 MSSA strains. In addition to the MDR phenotype, all of the ST398 MSSA strains exhibited resistance to tetracycline as they harbored the tet(K), tet(L), and/or tet(M) genes. However, ST398 MSSA strains did not exhibit increased resistance to zinc compared with the non-ST398 strains. This study is the first to provide evidence of ST398 MSSA emergence in livestock animals in Korea. Further studies are necessary to elucidate the potential of ST398 MSSA strains for human transmission. Our findings suggest that the MDR phenotype and high levels of tetracycline resistance may have played an important role in the emergence and prevalence of ST398 MSSA in pig farms in Korea.