The equal-time or static temperature correlation function from fluctuations originated at a surface is computed. Such fluctuations come from a random heat flux appearing in Newton's law of cooling. The correlation is studied in the real space and for different values of the Nusselt number.

Voltage fluctuations near Gunn threshold are analyzed by introducing a model which takes into account the presence of inhomogeneities in the donor density. Correlation functions in different representations are computed and critical behavior is discussed. Our results are compared with Keizer's...

Fluctuations about homogeneous and inhomogeneous non-equilibrium steady states near Gunn instability are studied. Density and electric field autocorrelation functions in Fourier and real spaces are calculated in the framework of generalized Landau-Lifshitz fluctuating hydrodynamics. Some...

We study the propagation of the temperature fluctuations in a system in the presence of an interface. Such fluctuations originate from surface noise sources which are introduced through the random parts of the interfacial currents which satisfy fluctuation-dissipation theorems. The formal...

We study the dynamics of an axisymmetric particle suspended in a fluid. The approach we use is based on the induced forces method. We then obtain formal expressions for the friction tensors from which one derives explicit formulas for the friction coefficients depending on the shape of the...

We present new results in a model of technological evolution which displays different macroscopic behaviors based on very simple microscopic rules of local interaction. The main features are criticality and self-organization. We give information about new scaling relation and study the roughness...

We model the Internet as a network of interconnected Autonomous Systems which self-organize under an absolute lack of centralized control. Our aim is to capture how the Internet evolves by reproducing the assembly that has led to its actual structure and, to this end, we propose a growing...