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Tripathi, V.*; Bhattacharya, S.*; Rubino, E.*; Benetti, C.*; Perello, J. F.*; Tabor, S. L.*; Liddick, S. N.*; Bender, P. C.*; Carpenter, M. P.*; Carroll, J. J.*; et al.
Physical Review C, 109(4), p.044320_1 - 044320_15, 2024/04
被引用回数:0 パーセンタイル:0.00(Physics, Nuclear)ミシガン州立大学の国立超伝導サイクロトロン研究所においてCaのフラグメンテーション反応によって中性子過剰核
Sを生成し、そこからのベータ崩壊および遅発中性子放出ベータ崩壊によって
Clの励起状態を得た。得られた実験データをSDPFSDG-MU相互作用を用いた大規模殻模型計算と比較し、よい一致を得た。
Bierwage, A.; Yun, G. S.*; Choe, G. H.*; Nam, Y.*; Lee, W.*; Park, H. K.*; Bae, Y.-S.*
Nuclear Fusion, 55(1), p.013016_1 - 013016_17, 2015/01
被引用回数:4 パーセンタイル:17.25(Physics, Fluids & Plasmas)The dynamics of multiple flux tubes in the core of a sawtoothing tokamak plasma are studied numerically. This is motivated by observations of long-lived hot spots in the ECE images of KSTAR plasmas with ECH. Using a empirical source term in a reduced set of MHD equations, it is shown that flux tubes with helicity h=1 are easily produced and survive for the observed time intervals only if the safety factor q is close to unity and the magnetic shear is small. It is shown that under these conditions the spatial localization of ECH may allow it to actively induce the formation of the tubes. Using simulations, we examine how the flux tubes merge and annihilate, and how their dynamics depend on the strength of the drive. We conclude that flux tubes play an important role for the dynamic competition between sources and sinks of thermal and magnetic energy during the sawtooth ramp phase. The development of self-consistent simulation models is motivated and directions for experiments are given.
Poornam, G. P.*; 松本 淳; 石田 恒; Hayward, S.*
Proteins; Structure, Function, and Bioinformatics, 76(1), p.201 - 212, 2008/12
被引用回数:85 パーセンタイル:90.79(Biochemistry & Molecular Biology)A new method for the analysis of domain movements in large, multichain, biomolecular complexes is presented. The method is applicable to any molecule for which two atomic structures are available that represent a conformational change indicating a possible domain movement. The method is blind to atomic bonding and atom type and can, therefore, be applied to biomolecular complexes containing different constituent molecules such as protein, RNA, or DNA. Here, we report on the application of the method to biomolecules covering a considerable size range: hemoglobin, liver alcohol dehydrogenase, S-Adenosylhomocysteine hydrolase, aspartate transcarbamylase, and the 70S ribosome. The results provide a depiction of the conformational change within each molecule that is easily understood, giving a perspective that is expected to lead to new insights.
米田 安宏; Nam, H.*; 上野 慎太郎*; 藤井 一郎*; Kim, S.*; 和田 智志*
no journal, ,
In nanoscale structural analysis of ferroelectrics by combining synchrotron radiation high-energy X-ray diffraction and pair distribution function (PDF) method, the deviation between the inside of the domain and the average structure can be extracted. The mixed crystal of BiFeO and BaTiO
shows relatively good piezoelectric properties, but the properties are further improved by adding Bi(Mg
Ti
)O
. When the experimentally obtained PDF was fitted with the cubic structure, which is the average structure, it could be reproduced almost completely in the region of 80 AA or more. However, in the region of 40 AA or less, the difference between the experimentally obtained PDF and the cubic structure is large, and it is clear that the local structure is different from the average structure. The ferroelectric mechanism can be clarified by structural modeling using the observed PDF brlowe 80 AA.