The crystal computer - computing with inorganic cellular frameworks and nets

The enormous potential of parallel computing has led to the first prototype devices being constructed. However, all the examples to date rely on complicated chemical and/or physical manipulations, and hence do not lend themselves to the kind of widespread investigation necessary to advance the field. This article presents a new paradigm for parallel computing: the use of solid, single crystalline materials as cellular automata suggesting the idea of the “Crystal Computer,” now possible due to a new class of crystalline cellular materials that undergo single-crystal-to-single-crystal (SC-SC) oxidation and reduction (REDOX) reactions. Two avenues are proposed for investigation: reversible single-crystal to single-crystal electronic transformations and solid-state spin transfer within spin-crossover complexes. Both schemes allow computation to occur in three dimensions, within cheap and easy to assemble materials and using commonplace techniques for input and readout

Electroweak measurements in electron–positron collisions at w-boson-pair energies at lep

Contains fulltext : 121524.pdf (preprint version ) (Open Access

Search for Charged Higgs bosons: Combined Results Using LEP Data

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Higgs Doublet Models (2HDMs). The data of the four experiments are statistically combined. The results are interpreted within the 2HDM for Type I and Type II benchmark scenarios. No statistically significant excess has been observed when compared to the Standard Model background prediction, and the combined LEP data exclude large regions of the model parameter space. Charged Higgs bosons with mass below 80 GeV/c^2 (Type II scenario) or 72.5 GeV/c^2 (Type I scenario, for pseudo-scalar masses above 12 GeV/c^2) are excluded at the 95% confidence level