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Energy fluctuations 2 Finite heat baths 2 Ising model 2 Random lattices 2 75.40.Mg Numerical simulation studies - 75.40.Cx Static properties (order parameter 1 Canonical ensemble 1 Classical Monte Carlo methods 1 Critical dynamics 1 Critical exponents 1 Damage spreading 1 Dielectric breakdown 1 Diluted ferromagnet 1 Dynamical phase transitions 1 Ferromagnetic Ising model 1 Ferromagnetism 1 Forchheimer's equation 1 Growth 1 Heisenberg model 1 MOS devices 1 Monte Carlo methods 1 PACS. 64.60.Fr Equilibrium properties near critical points 1 PACS. 75.70.Ak Magnetic properties of monolayers and thin films 1 Percolation 1 Phase transition 1 Porous media 1 Reliability 1 Self-organization 1 Spin models 1 Spreading of damage 1 Tsallis statistics 1 Turbulence 1 Weibull distribution 1 critical exponents 1 critical exponents - 05.10.Ln Monte Carlo methods - 05.20.-y Classical statistical mechanics 1 etc.) 1 heat capacities 1 static susceptibility 1
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Costa, U.M.S. 11 Costa, U.M.S 5 Potiguar, F.Q. 3 Almeida, M.P. 2 Andrade, J.S 2 Lima, F.W.S. 2 Lyra, M.L 2 Almeida, M.P 1 Cavalcante, F.S.A 1 Costa Filho, R.N. 1 Freire, V.N. 1 J.S. Andrade Jr. 1 Jr., J.S. Andrade 1 Lima, F.W.S 1 Luz, E.M. de Sousa 1 Lyra, M.L. 1 Macedo, H.H. 1 Makse, H.A. 1 Malacarne, L.C. 1 Mariz, A.M. 1 Mendes, R.S. 1 Moreira, A.A 1 Moreira, J.E 1 Nobre, F.D. 1 Picoli Jr., S. 1 Potiguar, F.Q 1 Rojdestvenski, I.V. 1 Siqueira, A.F. 1 Sousa Luz, E.M. de 1 Stanley, H.E. 1 da Silva Jr., E.F. 1 de Sousa, E.S. 1 de Souza, A.F 1 de Vasconcelos, E.A. 1
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Physica A: Statistical Mechanics and its Applications 14 The European Physical Journal B - Condensed Matter and Complex Systems 2
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RePEc 16
Showing 1 - 10 of 16
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Critical behavior of the 3D Ising model on a poissonian random lattice
Lima, F.W.S.; Costa, U.M.S.; Costa Filho, R.N. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 7, pp. 1545-1550
The single-cluster Monte Carlo algorithm and the reweighting technique are used to simulate the 3D ferromagnetic Ising model on 3D Voronoi–Delauney lattices. It is assumed that the coupling factor J varies with the distance r between the first neighbors as J(r)∝e−ar, with a≥0. The...
Persistent link: https://www.econbiz.de/10011059843
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An improved description of the dielectric breakdown in oxides based on a generalized Weibull distribution
Costa, U.M.S.; Freire, V.N.; Malacarne, L.C.; Mendes, R.S. - In: Physica A: Statistical Mechanics and its Applications 361 (2006) 1, pp. 209-215
In this work, we address modal parameter fluctuations in statistical distributions describing charge-to-breakdown (QBD) and/or time-to-breakdown (tBD) during the dielectric breakdown regime of ultra-thin oxides, which are of high interest for the advancement of electronic technology. We reobtain...
Persistent link: https://www.econbiz.de/10010591698
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Thermodynamical relations for systems in contact with finite heat baths
Potiguar, F.Q.; Costa, U.M.S. - In: Physica A: Statistical Mechanics and its Applications 344 (2004) 3, pp. 614-618
We obtain the relations between macroscopic thermodynamical properties and microscopic ensemble averages of a system in contact with a heat bath which has a finite number of degrees of freedom. Our approach is based on the geometry of the accessible phase space of the system. By using a suitable...
Persistent link: https://www.econbiz.de/10010590648
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Numerical calculation of the energy-relative fluctuation for a system in contact with a finite heat bath
Potiguar, F.Q.; Costa, U.M.S. - In: Physica A: Statistical Mechanics and its Applications 342 (2004) 1, pp. 145-150
We have recently shown that the dispersion and the energy square relative fluctuations of a finite system in contact with a finite heat bath depends on the number of degrees of freedom of the system and of the bath. In this paper, we present numerical simulations which support this result.
Persistent link: https://www.econbiz.de/10010591814
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Fluctuation of energy in the generalized thermostatistics
Potiguar, F.Q; Costa, U.M.S - In: Physica A: Statistical Mechanics and its Applications 321 (2003) 3, pp. 482-492
We calculate the fluctuation of a system's energy 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 term. We also find an explicit expression for the...
Persistent link: https://www.econbiz.de/10010591378
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Self-organized percolation growth in regular and disordered lattices
Cavalcante, F.S.A; Moreira, A.A; Costa, U.M.S; Andrade, J.S - In: Physica A: Statistical Mechanics and its Applications 311 (2002) 3, pp. 313-319
The self-organized percolation process (SOP) is a growth model in which a critical percolation state is reached through self-organization. By controlling the number of sites or bonds in the growth front of the aggregate, the system is spontaneously driven to a stationary state that corresponds...
Persistent link: https://www.econbiz.de/10010590881
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Transport theory in the context of the normalized generalized statistics
Potiguar, F.Q.; Costa, U.M.S. - In: Physica A: Statistical Mechanics and its Applications 303 (2002) 3, pp. 457-468
In this work assuming that the equipartition theorem is valid and using the normalized q-expectation value, we obtain, until first-order approximation, the hydrodynamics equation for the generalized statistics. These equations are different from those obtained in the context of the...
Persistent link: https://www.econbiz.de/10010591152
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Turbulent effects on fluid flow through disordered porous media
Macedo, H.H.; Costa, U.M.S.; Almeida, M.P. - In: Physica A: Statistical Mechanics and its Applications 299 (2001) 3, pp. 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 κ–ε model for turbulence. The spatial domains are two-dimensional rectangular grids with different porosities...
Persistent link: https://www.econbiz.de/10011062578
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Diagrammatic damage spreading in the quantum Heisenberg ferromagnet
Costa, U.M.S; de Souza, A.F; Lyra, M.L - In: Physica A: Statistical Mechanics and its Applications 283 (2000) 1, pp. 42-47
The Handscomb Monte Carlo method is a powerful tool for the investigation of the critical properties of quantum spin models. The sample space in this technique is constructed over the space of ordered Mayer's diagrams and it is the diagrammatic series of the partition function that is calculated...
Persistent link: https://www.econbiz.de/10011062301
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The ferromagnetic Ising model on a Voronoi–Delaunay lattice
Lima, F.W.S; Moreira, J.E; Andrade, J.S; Costa, U.M.S - In: Physica A: Statistical Mechanics and its Applications 283 (2000) 1, pp. 100-106
We investigate the two-dimensional ferromagnetic Ising model in the Voronoi–Delaunay tesselation. In this study, we assume that the coupling factor J varies with the distance r between the first neighbors as J(r)∝e−αr, with α⩾0. The disordered system is simulated applying the...
Persistent link: https://www.econbiz.de/10011062778
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