129,860 research outputs found
Ljubljanska izjava
Ljubljanska izjava o rabi slovenskega jezika v visokošolskih ustanovah v Sloveniji z namenom ohranjanja jezikovne raznolikosti v Evropski unij
A quadratic lower bound for subset sums
Let A be a finite nonempty subset of an additive abelian group G, and let
\Sigma(A) denote the set of all group elements representable as a sum of some
subset of A. We prove that |\Sigma(A)| >= |H| + 1/64 |A H|^2 where H is the
stabilizer of \Sigma(A). Our result implies that \Sigma(A) = Z/nZ for every set
A of units of Z/nZ with |A| >= 8 \sqrt{n}. This consequence was first proved by
Erd\H{o}s and Heilbronn for n prime, and by Vu (with a weaker constant) for
general n.Comment: 12 page
Warburton, N. (2012). Vprasanje umetnosti [The art question]. Afterword study by Marjan Simenc. Ljubljana: Sophia. [Book review]
Book review of: Warburton, N. (2012). Vprasanje umetnosti [The art question]. Afterword study by Marjan Simenc. Ljubljana: Sophia. 158 p., ISBN 978-961-6768-48-1
27th European Congress of Arachnology, Ljubljana, Slovenia, 2 - 7 September 2012
Recently 157 participants from 39 countries met in Ljubljana, Slovenia, for presenting, discussing and sharing arachnological topics. This was the 27th European Congress of Arachnology, held from the 2nd to 7th of September 2012
Transport in tunnelling recombination junctions: a combined computer simulation study
The implementation of trap-assisted tunneling of charge carriers into numerical simulators ASPIN and D-AMPS is briefly described. Important modeling details are highlighted and compared. In spite of the considerable differences in both approaches, the problems encountered and their solutions are surprisingly similar. Simulation results obtained for several tunneling recombination junctions made of amorphous silicon (a-Si), amorphous silicon carbide (a-SiC), or microcrystalline silicon (µc-Si) are analyzed. Identical conclusions can be drawn using either of the simulators. Realistic performances of a-Si/a-Si tandem solar cells can be reproduced with simulation programs by assuming that extended-state mobility increases exponentially with the electric field. The same field-enhanced mobilities are needed in single tunneling recombination junctions in order to achieve measured current levels. Temperature dependence of the current-voltage characteristics indicates that the activation energy of enhanced mobilities should be determined. Apparent discrepancies between simulation results and measurements are explained and eliminated making use of Gill’s law. For application in tandem and triple solar cell structures, tunneling recombination junctions made of (µc-Si) are the most promising of all examined structures.Fil: Vukadinovic, M.. University of Ljubljana; EsloveniaFil: Smole, F.. University of Ljubljana; EsloveniaFil: TopiÄŤ, M.. University of Ljubljana; EsloveniaFil: Schropp, R. E. .. Utrecht University; PaĂses BajosFil: Rubinelli, Francisco Alberto. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Santa Fe. Instituto de Desarrollo TecnolĂłgico para la Industria QuĂmica. Universidad Nacional del Litoral. Instituto de Desarrollo TecnolĂłgico para la Industria QuĂmica; Argentin
Top Quark Properties
Recent measurements of top-quark properties at the LHC and at the Tevatron
are presented. The results include precision measurements of standard model
parameters, such as the top-quark mass, the measurement of angular
distributions as well as the search for anomalous couplings.Comment: Conference proceedings for Lepton Photon, Ljubljana, 17-22 August
2015, 12 pages, 10 figure
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