Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Costa, U. M."'
Autor:
Costa, U. M. S., Freire, V. N., Malacarne, L. C., Mendes, R. S., Picoli, Jr., S., de Vasconcelos, E. A., Silva, Jr, E. F. da
Publikováno v:
Physica A 361 (2006) 209-215
In this work, we address modal parameter fluctuations in statistical distributions describing charge-to-breakdown $(Q_{BD})$ and/or time-to-breakdown $(t_{BD})$ during the dielectric breakdown regime of ultra-thin oxides, which are of high interest f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602515
The single-cluster Monte Carlo algorithm and the reweighting technique are used to simulate the 3D-ferromagnetic Ising model on three dimensional Voronoi-Delaunay lattices. It is assumed that the coupling factor $J$ varies with the distance $r$ betwe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509303
Autor:
Potiguar, F. Q., Costa, U. M. S.
Publikováno v:
Physica A, volume 342, page 145(2004)
We use a scheme of separation of degrees of freedom for a system, in order to produce two systems with finite number of degrees of freedom. Our intent is to measure the energy square relative fluctuation (SRF) of the observable part through the simul
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302593
Voting data from city-councillors, state and federal deputies elections are analyzed and considered as a response function of a social system with underlying dynamics leading to complex behavior. The voting results from the last two general Brazilian
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211560
The zero-temperature Glauber dynamic is used to investigate the persistence probability $P(t)$ in the randomic two-dimensional ferromagnetic Ising model on a Voronoi-Delaunay tessellation. We consider the coupling factor $J$ varying with the distance
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211097
Autor:
Potiguar, F. Q., Costa, U. M. S.
Publikováno v:
Physica A, 321, 482(2003)
We calculate the fluctuation of the energy of a system in Tsallis statistics following the finite heat bath canonical ensemble approach. We obtain this fluctuation as the second derivative of the logarithm of the partition function plus an additional
Externí odkaz:
http://arxiv.org/abs/cond-mat/0210525
Autor:
Potiguar, F. Q., Costa, U. M. S.
We show, in two different ways, that the Tsallis' partition function and its derivatives are related to thermodynamic quantities such as entropy, internal energy, etc., in the same way as in Boltzmann-Gibbs' formalism, with the Lagrange multiplier $\
Externí odkaz:
http://arxiv.org/abs/cond-mat/0208357
It is presented a microscopic interpretation for the temperature within Tsallis thermostatistics, generalizing the classical derivation based on the Boltzmann-Gibbs statistics. It is shown that with this definition the zeroth law and the equipartitio
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206243
Autor:
Potiguar, F. Q., Costa, U. M. S.
Publikováno v:
Physica A, 303 (2002) 457
In this work assuming valid the equipartition theorem and using the normalized q-expectation value, we obtain, until first order approximation, the hydrodynamics equation for the generalized statistics. This equations are different from those obtaine
Externí odkaz:
http://arxiv.org/abs/cond-mat/0104379
Publikováno v:
Physica A 299 (2001) 371-377
The influence of turbulent effects on a fluid flow through a (pseudo) porous media is studied by numerically solving the set of Reynolds-averaged Navier-Stokes equations with the $\kappa$-$\epsilon$ model for turbulence. The spatial domains are two-d
Externí odkaz:
http://arxiv.org/abs/cond-mat/0102238