Browsing by Subject "Physics, Multidisciplinary"
Now showing items 120 of 21

Detection of lowdimensional chaos in wind time series
(2009)In the present work we investigated the existence of lowdimensional deterministic chaos in wind time series. The time series were obtained from the New Anchialos (Greece) Air Base Measurement station. In a first place we ... 
Distribution of EnergyMomentum in a SchwarzschildQuintessence SpaceTime Geometry
(2013)An analysis of the energymomentum localization for a fourdimensional Schwarzschild black hole surrounded by dark energy in the form of quintessence is presented in order to provide expressions for the distributions of ... 
Energy distribution in a Schwarzschildlike spacetime
(2007)In this paper, utilizing Moller's energymomentum complex, we explicitly evaluate the energy and momentum density associated with a metric describing a fourdimensional, Schwarzschildlike, spacetime derived from an effective ... 
EnergyMomentum Localization for a SpaceTime Geometry Exterior to a Black Hole in the Brane World
(2013)In general relativity one of the most fundamental issues consists in defining a generally acceptable definition for the energymomentum density. As a consequence, many coordinatedependent definitions have been presented, ... 
Feedback controlling against chaos
(2000)A PD (Proportional plus Derivative) feedback controller is proposed for the control of chaotic dynamic systems. Using this feedback law the design requirement of command matching is satisfied independently of the perturbations ... 
Gaseous mixture flow between two parallel plates in the whole range of the gas rarefaction
(2004)The flow of binary gaseous mixtures between two parallel plates driven by gradients of pressure, temperature and concentration is studied, based on the McCormack model of the Boltzmann equation. The coupled kinetic equations ... 
A homogenous random fractal model for time series produced by constant energy molecular dynamics simulations
(2003)In the present work we present an analysis of time series of instantaneous temperature and pressure produced during microcanonical (constant energy) molecular dynamics (MD). Simulations were applied to a nickel oxide grain ... 
Localization of energy for a regular black hole solution in an asymptotically de Sitter spacetime geometry
(2011)The energy and momentum distributions of a regular black hole in a fourdimensional, asymptotically de Sitter spacetime geometry are computed, whereby the Einstein, LandauLifshitz, Weinberg and Moller energymomentum ... 
Moller's energymomentum complex for a spacetime geometry on a noncommutative curved D3brane
(2008)Moller's energymomentum complex is employed in order to determine the energy and momentum distributions for a spacetime described by a "generalized Schwarzschild" geometry in (3+1)dimensions on a noncommutative curved ... 
Noise perturbation of the thermostat in constant temperature molecular dynamics simulations
(2004)In this work we study the effects of noise applied on the thermostat in the case of the constant temperature molecular dynamics simulations. We consider the cases of additive and or multiplicative noise. We then examine ... 
Numerical integration of fluid dynamics problems by discrete dynamical systems
(2000)A discrete time algorithm for the numerical solution of the NavierStokes equations, namely the set of nonlinear partial differential equations (PDEs) characterizing the how of viscous and compressible fluids is presented. ... 
On perturbations of the Mandelbrot map
(2000)In this work, we propose new applications of analytic and nonanalytic perturbations of the Mandelbrot map as expressed in a twoparameter deformation family of it. The influence of alternative applications of noise for ... 
On probabilistic Mandelbrot maps
(2009)In this work, we propose a definition for a probabilistic Mandelbrot map in order to extend and support the study initiated by Argyris et al. [Argyris J, Andreadis I, Karakasidis Th. On perturbations of the Mandelbrot map. ... 
On the Julia set of the perturbed Mandelbrot map
(2000)In this work, we present numerical results which support the smooth decomposition method of the generalized Julia set by Peintge et al., in the case of other perturbations of the Mandelbrot map studied in our previous work ... 
On the Julia sets of a noiseperturbed Mandelbrot map
(2002)In the present work we present numerical results which support further a 2 " type bifurcation scenario for the interior of the Fatou sets, as suggested by the smooth decomposition method introduced by Peinke, Parisi, ... 
Photonic integrated device for chaos applications in communications
(2008)A novel photonic monolithic integrated device consisting of a distributed feedback laser, a passive resonator, and active elements that control the optical feedback properties has been designed, fabricated, and evaluated ... 
Towards canonical quantum gravity for 3+1 geometries admitting maximally symmetric twodimensional surfaces
(2010)The canonical decomposition of all 3+1 geometries admitting twodimensional spacelike surfaces is exhibited as a generalization of a previous work. A proposal, consisting of a specific renormalization Assumption and an ... 
Towards canonical quantum gravity for G(1) geometries in 2+1 dimensions with Lambdaterm
(2008)The canonical analysis and subsequent quantization of the (2+1)dimensional action of pure gravity plus a cosmological constant term is considered, under the assumption of the existence of one spacelike Killing vector ... 
Transition of an electromagnetically driven liquid metal flow from laminar to turbulent in a toroidal square duct
(2013)The electromagnetically driven liquid metal flow in a toroidal duct of a square crosssection is studied numerically searching for the critical Reynolds (Re) and Hartmann (Ha) numbers where transition occurs. Results are ...