5,220 research outputs found

    Nauwkeurig lezen, precies manipuleren, als middel om gelegenheden te grijpen

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    Het artikel bespreekt het jonge oeuvre van Tom Thys Architecten en besteed een bijzondere aandacht voor de ontwerpmethodiek

    The curious case of curiosity: unpleasant advertising and curiosity

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    Previous research demonstrated that advertisements that induce positive feelings are effective. However, unpleasant advertising are frequently used and can be effective as well. This research examines whether evoked curiosity can explain the effectiveness of unpleasant advertising. Our results indicate that although unpleasant advertising did not lead to behavioral intention with regard to the advertised product, unpleasant advertising did evoke curiosity. Curiosity itself proves to be a strong predictor of behavioral intention

    Toughening of the ceramic superconductor Bi-2223 with Ag

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    In an attempt to increase the toughness of the high temperature superconductor Bi1.5Pb0.5Sr2Ca2Cu3Ox (Bi-2223) we synthesised composites with three different filler morphologies of Ag. It is shown that Ag-addition improves Bi-2223 grain growth and reduces sample-porosity. Little effect on the mechanical strength is observed but the mismatch in thermal expansion coefficient induces a residual stress field at the filler matrix interface and allows toughening mechanisms to appear. This results in a clear post-peak behaviour when filler with high aspect ratio is used. The effect of the aspect ratio on the efficiency of the toughening mechanisms is studied

    Reply to 'Comment on "Extending Hirshfeld-I to bulk and periodic materials" '

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    The issues raised in the comment by T.A. Manz are addressed through the presentation of calculated atomic charges for NaF, NaCl, MgO, SrTiO3_3 and La2_2Ce2_2O7_7, using our previously presented method for calculating Hirshfeld-I charges in Solids [J. Comput. Chem.. doi: 10.1002/jcc.23088]. It is shown that the use of pseudo-valence charges is sufficient to retrieve the full all-electron Hirshfeld-I charges to good accuracy. Furthermore, we present timing results of different systems, containing up to over 200200 atoms, underlining the relatively low cost for large systems. A number of theoretical issues is formulated, pointing out mainly that care must be taken when deriving new atoms in molecules methods based on "expectations" for atomic charges.Comment: 7 pages, 2 Tables, 2 figure

    Extending Hirshfeld-I to bulk and periodic materials

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    In this work, a method is described to extend the iterative Hirshfeld-I method, generally used for molecules, to periodic systems. The implementation makes use of precalculated pseudo-potential based charge density distributions, and it is shown that high quality results are obtained for both molecules and solids, such as ceria, diamond, and graphite. The use of such grids makes the implementation independent of the solid state or quantum chemical code used for studying the system. The extension described here allows for easy calculation of atomic charges and charge transfer in periodic and bulk systems.Comment: 11 pages, 4 Tables, 5 Figures, pre-referee draft only, much extended post referee version only available at publishe

    A model for the percolation effect in the magnetic susceptibility of HTSC composites

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    A simple model is proposed to explain the nature of the screening properties of superconducting composites. The percolation effect in the susceptibility and the maximum in shielding efficiency are interpreted as a consequence of the encapsulation of nonsuperconducting areas by the superconducting material. A three dimensional simulation based on site-bond percolation theory was conducted to test this model, using the calculated fraction of bonds that become superconducting at low temperatur
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