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C. J. Yoon,H. Akikawa,K. Aoki,Y. Fukao,H. Funahashi,M. Hayata,K. Imai,K. Miwa,H. Okada,N. Saito,H. D. Sato,K. Shoji,H. Takahashi,K. Taketani,J. Asai,M. Kurosawa,M. Ieiri,T. Hayakawa,T. Kishimoto,A. Sa 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
We determined scattering length and effective range of ΛΛ scattering for the ΛΛ relative energy (M_(ΛΛ)-2M_Λ) from ΛΛ threshold to 30 MeV/c_2. Phase shift of the ΛΛ wave function which described by scattering length and effective range was determined by fitting the ΛΛ mass spectrum. The obtained scattering length -0.10^(+0.37)_(-1.56) ± 0.04, and effective range 13.90 ^(+14.35)_(-9.13) ± 10.53 fm is the most consistent with the values predicted by using a series of the Nijmegen soft core models NSC97's. However the predicted values by using the Nijmegen hard core model ND (G-matrix), the extended soft core model ESC00, and the Kyoto-Niigata FSS are out of three standard deviations from the determined scattering parameters. Further, we determine ΛΛ potential by fitting the ΛΛ invariant mass spectrum using numerically solved ΛΛ wave function with two-Gaussian shaped potential well. The ΛΛ scattering parameters derived from the wave function are found to be scattering length -0.09, and effective range 29.34 fm with a maximum phase shift of 2.4 deg.
객체 지향형 프로그램에 의한 유한 요소법 코드 개발에 관한 연구
사종엽,채은미,이철욱,성윤제,허준성,편상욱,강태영 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.1
A computer code of finite element method is developed by using the ?? programming language. The concept of class, inheritance, and polymorphism in ?? improves the modularity and the flexibility(such as potability, implantability, and expandability) of engineering software. The graphic user interface (GUI) is designed by using the MFC(Microsoft Foundation Class) based on ??, and combined successfully with the main code of FEM solver. This study shows the superior of OOP(Object-Oriented programming) such as ?? to other progamming languages when applied to complicated engineering problems.
Analysis of Cyp2b1 gene expression in the rat liver and brain by multiplex PCR
America Vanoye-Carlo,Gabriel Gutiérrez-Ospina,Jaime Marcial-Quino,Saúl Gómez-Manzo,Itzhel Garcia-Torres,Ignacio De la Mora-De la Mora,Sergio Enríquez-Flores,Sara T. Méndez,Bryan V. Phillips-Farfán,Ped 대한독성 유전단백체 학회 2015 Molecular & cellular toxicology Vol.11 No.4
The CYP2B6 enzyme is involved in the metabolism of environmental toxins and endogenous compounds. The expression and activity of the cyp2b6 gene is important for the brain’s ability to detoxify harmful compounds. In rats, the Cyp2b1 gene is homologous to the human Cyp2b6 gene and has an isoform, Cyp2b2, with nearly the same sequence. Although the distinction between them is fundamental, most studies report global changes in CYP2B enzymes due to the complexity of the techniques to detect both genes separately. We instrumented a semi-quantitative technique combining multiplex end point RT-PCR with restriction enzyme assays, allowing us to establish a relatively simple, reproducible and affordable method to distinguish Cyp2b1 gene expression from Cyp2b2. Using this technique, we showed differential Cyp2b1 expression after phenobarbital and ethanol induction in the brain and liver and detected increased Cyp2b1 expression after ethanol treatment in the brain striatum that had not been detected before.
Machining of the KSTAR TF coil structure
K. H. Hong,C. H. Choi,D. H. Park,D. K. Hur,H. Sin,H. K. Park,H. T. Kim,J. H. Won,J. H. Lim,J. M. Chung,박주식,J. W. Sa,J. Y. Song,N. G. Kim,S. H. Hwang,Y. D. Chu,Y. G. Song 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The KSTAR Toroidal Field (TF) magnet system consists of 16 TF structures. Each structure must be machined for precise assembly and reducing error field. Dimensions of the structure are a height of 4.5 m and a width of 3.2 m. The allowable tolerance of the structure is ±1 2 mm, and that of the bolt hole for Poloidal Field (PF) coil basement is ±0.5 mm. The final machining of the structure is also important for assembly of the interface structures such as toroidal ring, PF coil structures, and Central Solenoid (CS) structure. Before coil encasing, the inside surface of the structure is machined. Most of the outer surface of the structure, except for the surface of the intercoil structure (ICS), is machined after final welding. In particular, the side surface of an inboard leg, the connection plate of the ICS, the toroidal ring basement, the PF structure basements, shear key holes, and conical bolt holes are precisely machined. Fabrication and assembly tolerances are absorbed by the thickness of the electrical insulation, the spacer of the shear key, and the taper ring of the conical bolt. Six TF coil structures have been assembled and two structures are waiting for assembly. Another three structures are under final machining. A laser tracker is used for three dimensional survey and measurement of the structure.