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Modelisation of electrical intergrain contacts at high frequencies

Clerc, J.P.; Brouers, F.; Sarychev, A.K. - In: Physica A: Statistical Mechanics and its Applications 241 (1997) 1, pp. 289-295

A number of physical and physicochemical properties of granular materials can be traced to the nature of the interfaces and contact between the grains. In this paper we deal more specifically with the electrical resistance of the inter-granular contacts. More generally we will consider the...

Persistent link: https://www.econbiz.de/10010586691

Recent advances in strong field magneto-transport in a composite medium

Bergman, David J.; Strelniker, Yakov M.; Sarychev, Andrey K. - In: Physica A: Statistical Mechanics and its Applications 241 (1997) 1, pp. 278-283

Macroscopic inhomogeneities have a profound effect on electrical conductivity in the presence of a strong magnetic field B. One expression of this is the appearance of a new physical length in the system, which increases with B and is unbounded. This length characterizes the extra distortions of...

Persistent link: https://www.econbiz.de/10010587382

Giant field fluctuations and characteristic lengths in optical properties of nano metal-dielectric films

Brouers, F.; Sarychev, A.K.; Blacher, S.; Lothaire, O. - In: Physica A: Statistical Mechanics and its Applications 241 (1997) 1, pp. 146-153

We show that the intensities of the local electric field in metal-dielectric granular films may exhibit giant fluctuations in the optical and infrared range when the dissipation in metallic grains is low. It is found that these fluctuations are highly correlated in space. We introduce a new...

Persistent link: https://www.econbiz.de/10011057050

Exergy transported by particle fluxes

Badescu, Viorel - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 8, pp. 1818-1826

A general theory for the available work (exergy) carried by particle fluxes is developed ab initio by using a simple … statistical thermodynamics approach. Relationships that may be used for both fermions and bosons are derived. The exergy flux of … free particles involves an efficiency-like factor affecting the energy flux. This factor contains the environment …

Persistent link: https://www.econbiz.de/10011063418

Simulation study on microstructure formations in magnetic fluids

Enomoto, Yoshihisa; Oba, Katsumi; Okada, Masafumi - In: Physica A: Statistical Mechanics and its Applications 330 (2003) 3, pp. 496-506

We propose the Langevin-type microscopic equations of motion for magnetic fluids. Magnetic fluids are modeled as an ensemble of interacting ferromagnetic nanoparticles suspended in a viscous fluid. The present model is described in terms of position vectors of nanoparticles and orientation...

Persistent link: https://www.econbiz.de/10010588411

Combined update scheme in the Sznajd model

Yu-Song, Tu; Sousa, A.O.; Ling-Jiang, Kong; Mu-Ren, Liu - In: Physica A: Statistical Mechanics and its Applications 370 (2006) 2, pp. 727-733

We analyze the Sznajd opinion formation model, where a pair of neighboring individuals sharing the same opinion on a square lattice convinces its six neighbors to adopt their opinions, when a fraction of the individuals is updated according to the usual random sequential updating rule...

Persistent link: https://www.econbiz.de/10010588545

A nonextensive statistical approach to the kinetics of phase transformation

Kayacan, Ozhan; Cetinel, Hakan - In: Physica A: Statistical Mechanics and its Applications 348 (2005) C, pp. 223-235

Some limitations of Johnson–Mehl–Avrami–Kolmogorov (JMAK) equation, which is used widely for describing kinetics of phase transformation, were demonstrated using probabilistic analysis and Monte Carlo simulations [Acta Mater. 48 (2000) 4217]. As well-known, JMAK equation predicts correctly...

Persistent link: https://www.econbiz.de/10010590091

Simulation study on nanocluster growth deposited on a substrate

Enomoto, Yoshihisa; Sawa, Masataka - In: Physica A: Statistical Mechanics and its Applications 331 (2004) 1, pp. 189-197

We present a model equation that describes nucleation and growth of hemispherical nanoclusters or islands deposited on a substrate for the small surface coverage case. The model is formulated in terms of a set of rate equations for the island sizes, combined with the time-dependent behavior of...

Persistent link: https://www.econbiz.de/10010590598

Investigation of nucleation and grain growth in 2-dimensional systems by using generalized Monte Carlo simulations

Cetinel, Hakan; Kayacan, Ozhan; Ozaydin, Demet - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 18, pp. 4121-4126

locating the minimum energy configuration. Therefore, for a given temperature, the fact that a configuration of the system with … lower energy could be obtained by using the generalized Monte Carlo simulation means that a different textural configuration …

Persistent link: https://www.econbiz.de/10010679211

Studying DNA evolution through successive file editions

Oliveira, Paulo Murilo Castro de - In: Physica A: Statistical Mechanics and its Applications 273 (1999) 1, pp. 70-74

We propose an experimental way to test theories concerning DNA evolution mechanisms, through computer simulations.

Persistent link: https://www.econbiz.de/10010664825