نتایج جستجو برای: gamba and lossani 2000
تعداد نتایج: 16850186 فیلتر نتایج به سال:
We introduce a gaussian probability density for the space-time distribution of wormholes, thus taking effectively into account wormhole interaction. Using a meanfield approximation for the free energy, we show that giant wormholes are probabilistically suppressed in a homogenous isotropic “large” universe. 1 E-mail: [email protected]. 2 E-mail: [email protected]. 3 On leave of absence fr...
We study the first-order formalism of pure four-dimensional SU(2) Yang–Mills theory with theta-term. We describe the Green functions associated to electric and magnetic flux operators à la ’t Hooft by means of gauge-invariant non-local operators. These Green functions are related to Witten’s invariants of four-manifolds. E-mail: [email protected] 2 E-mail: [email protected] E-mail:...
Roland Bliem,1 Jiri Pavelec,1 Oscar Gamba,1 Eamon McDermott,2 Zhiming Wang,1,* Stefan Gerhold,1 Margareta Wagner,1 Jacek Osiecki,3 Karina Schulte,3 Michael Schmid,1 Peter Blaha,2 Ulrike Diebold,1 and Gareth S. Parkinson1,† 1Institute of Applied Physics, Vienna University of Technology, Vienna, Austria 2Institute of Materials Chemistry, Vienna University of Technology, Vienna, Austria 3MAX IV La...
We discuss some general properties of the Landau kinetic equation. In particular, the difference between the ”true” Landau equation, which formally follows from classical mechanics, and the ”generalized” Landau equation, which is just an interesting mathematical object, is stressed. We show how to approximate solutions to the Landau equation by the Wild sums. It is the so-called quasi-Maxwellia...
A viola da gamba foi um instrumento protagonista no cenário musical Renascença e do Barroco europeu, adentrando período Clássico com alguns gambistas de renome. Por décadas, músicos musicólogos afirmaram que a seu repertório morreram o último gambista Carl Friederich Abel, quando faleceu em 1787. De uma perspectiva moderna é difícil compreender como teve tão grande aceitação nas cortes longa at...
the present study sought to investigate the role of dynamic assessment (da) in improvement of iranian efl writing performance at different language proficiency levels. to this end, after conducting the quick placement test, 60 iranian efl learners were assigned to two groups with different language proficiency levels. in both groups each participant wrote two compositions, one before and one af...
We consider the n-dimensional space homogeneous Boltzmann equation for elastic collisions for variable hard potentials with Grad (angular) cutoff. We prove sharp moment inequalities, the propagation of L-Maxwellian weighted estimates, and consequently, the propagation L-Maxwellian weighted estimates to all derivatives of the initial value problem associated to the afore mentioned problem. More ...
Time-dependent solutions to the BoltzmannPoisson system in two spatial dimensions and threedimensional velocity space are obtained by using a recently developed high order WENO scheme. The collision operator of the Boltzmann equation models the scattering processes between electrons and phonons which are assumed to be in thermal equilibrium. In this paper, the deterministic numerical solutions ...
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