Locating influential nodes via dynamics-sensitive centrality

With great theoretical and practical significance, locating influential nodes of complex networks is a promising issues. In this paper, we propose a dynamics-sensitive (DS) centrality that integrates topological features and dynamical properties. The DS centrality can be directly applied in locating influential spreaders. According to the empirical results on four real networks for both susceptible-infected-recovered (SIR) and susceptible-infected (SI) spreading models, the DS centrality is much more accurate than degree, $k$-shell index and eigenvector centrality.Comment: 6 pages, 1 table and 2 figure

Nonlinear transport theory for hybrid normal-superconducting devices

We report a theory for analyzing nonlinear DC transport properties of mesoscopic or nanoscopic normal-superconducting (N-S) systems. Special attention was paid such that our theory satisfies gauge invariance. At the linear transport regime and the sub-gap region where the familiar scattering matrix theory has been developed, we provide confirmation that our theory and the scattering matrix theory are equivalent. At the nonlinear regime, however, our theory allows the investigation of a number of important problems: for N-S hybrid systems we have derived the general nonlinear current-voltage characteristics in terms of the scattering Green's function, the second order nonlinear conductance at the weakly nonlinear regime, and nonequilibrium charge pile-up in the device which defines the electrochemical capacitance coefficients

Poly[[diaqua­(1,10-phenanthroline-κ2 N,N′)(μ3-4-sulfonato­benzene-1,2-dicarboxyl­ato-κ4 O 1:O 2 ,O 2′:O 4)dysprosium(III)] dihydrate]

The 4-sulfophthalate trianion in the polymeric title complex, {[Dy(C8H3O7S)(C12H8N2)(H2O)2]·2H2O}n, bridges three water/phenanthroline-coordinated DyIII atoms to form a three-dimensional network architecture. The metal atom is further chelated by a carboxyl­ate group and is covalently bonded to a monodentate carboxyl­ate group and to a monodentate sulfonate group in a distorted square-anti­prismatic geometry. The coordinating and the solvent water mol­ecules are hydrogen bonded to the network. In the crystal, one solvent water mol­ecule is disordered over two positions [major component = 59 (3)%]

trans,trans,trans-Diaquabis(nicotinamide-κN)bis­(2-nitro­benzoato-κO)cadmium(II) dihydrate

The cadmium atom in the title compound, [Cd(C7H4NO4)2(C6H6N2O)2(H2O)2]·2H2O, lies on a center of inversion in an all-trans octa­hedral environment. In the crystal, the complex inter­acts with the uncoordinated water mol­ecules through O—H⋯O and N—H⋯O hydrogen bonds, forming a layered network

Magnetic flux penetration in polycrystalline SmFeO0.75F0.2As

The recently discovered Fe–As superconducting materials which show high potential ability to carry current due to their low anisotropy have attracted a great number of attentions to understand their superconductivity mechanism and explore their applications. This paper presents a method to synthesis SmFeO0.75F0.20As polycrystalline by hot press in detail. The magnetization at different temperatures and applied fields obtained by a superconducting quantum interference device are also discussed. In addition, the local magnetization process is presented by magneto-optical imaging technique at the conditions of zero-field-cooling and field-cooling. It is found that the collective magnetization process of the newly discovered Fe–As superconductors is very similar to that of high-Tc cuprates. For instance, the Fe–As superconductors and high-Tc cuprates have the same magnetization features due to strong pining and intergrain weak link. The global supercurrent is significantly lower than local grain supercurrent due to the weak line between the grains