We investigate the network model of community by Watts, Dodds and Newman (D.J. Watts et al., Science <Emphasis Type="Bold">296, 1302 (2002)) as a hierarchy of groups, each of 5 individuals. A homophily parameter α controls the probability proportional to exp (-αx) of selection of neighbours against distance x. The...</emphasis>

A set of 3873 cracks on exposed granite rock surfaces are analyzed in order to investigate possible fracture mechanisms. The fracture patterns are compared with the Mohr-Coulomb and the Roscoe fracture models, which can be combined into a single fracture scheme. A third model for comparison is...

The performance of various structure characteristics in the task of indicating structural peculiarities in packings of hard spheres is investigated. Various characteristics based on Voronoi polyhedra, spherical harmonics, and Delaunay simplices are considered together with the pair correlation...

Results of simultaneous thermal analysis (STA), synchrotron powder diffraction (in the range 300–973 K) and inelastic neutron scattering (at 285 and 505 K) on non-superionic β- and superionic α-AgCuSe are reported. The sample is stable in argon on heating. The volume change at the...

The isothermal aging of the asymmetry induced in the disordered dielectric crystal <InlineEquation ID="Equ1"> <EquationSource Format="TEX">$\mbox{KTa}_{1-x} \mbox{Nb}_{x} \mbox{O}_{3} $</EquationSource> </InlineEquation> (x=0.027) submitted to the biasing electric field <Emphasis Type="Bold">E, is investigated. To this end, the response of the complex dielectric constant to infinitesimal field changes <InlineEquation ID="Equ2"> <EquationSource...</equationsource></inlineequation></emphasis></equationsource></inlineequation>

Differential Scanning Calorimetric (DSC) studies on Ag<Subscript>x</Subscript>Ge<Subscript>15</Subscript>Te<Subscript>85-x</Su bscript> glasses have been undertaken over a wide range of compositions, to understand the effect of topological thresholds on thermal properties. It is found that the compositional dependence of glass transition temperature (T <Subscript> g </Subscript>),...</subscript><//su></subscript></subscript></subscript>