Sandpile dynamics are considered on graphs constructed from periodic plane and space tilings by assigning a growing piece of the tiling, either torus or open boundary conditions. A general method obtaining Green’s function tiling is given, total variation cut-off phenomenon demonstrated under It shown that condition does not affect mixing time for planar tilings. In companion paper, computation...

background: snap-iv rating scale developed by swanson, nolan and pelham to diagnose attention deficit hyperactivity disorder (adhd). the aim of this study was determination of psychometrics specifications of this scale. methods: this was a methodological, applied and validity assessment study. one thousand students at 7 to 12 years of age in primary school in tehran city were selected by cluste...

in the construction process of a plastic concrete cut-off wall, concreting is usually performed using the termie pipe method. in this method, concreting is performed from the lowest point in the excavated trench (containing the slurry) using a funnel and the pipe connected to it. the concrete poured in the funnel gradually settles in the panel through the termie pipe which is beneath the slurry...

The minimal-length paradigm, a possible implication of quantum gravity at low energies, is commonly understood as phenomenological modification Heisenberg's uncertainty relation. We show that this equivalent to cut-off in the space conjugate position representation, i.e. wave numbers, which does not necessarily correspond momentum space. This result generalized several dimensions and noncommuta...

We present a generally applicable parameter-free first-principles method to determine electronic spin relaxation times and apply it to the technologically important group-IV materials silicon, diamond, and graphite. We concentrate on the Elliott-Yafet mechanism, where spin relaxation is induced by momentum scattering off phonons and impurities. In silicon, we find a ~T(-3) temperature dependenc...