Browsing Exact and Earth Sciences by Subject "Difusão"
Now showing items 1-20 of 24
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Analysis of cool DO-type white dwarfs from the Sloan Digital Sky Survey data release 10
(2014) [Journal article]We report on the identification of 22 new cool DO-type white dwarfs (WDs) detected in data release 10 (DR10) of the Sloan Digital Sky Survey (SDSS). Among them, we found one more member of the so-called hot-wind DO WDs, ... -
Anomalies in a waterlike model confined between plates
(2013) [Journal article]Using molecular dynamic simulations we study a waterlike model confined between two fixed hydrophobic plates. The system is tested for density, diffusion, and structural anomalous behavior and compared with the bulk results. ... -
Anomalous diffusion in the evolution of soccer championship scores : real data, mean-field analysis, and an agent-based model
(2013) [Journal article]Statistics of soccer tournament scores based on the double round robin system of several countries are studied. Exploring the dynamics of team scoring during tournament seasons from recent years we find evidences of ... -
Comparative study of intermetallic phases formed by direct ion implantation and radiation enhanced diffusion of tin in two kinds of steel
(1985) [Journal article]The surface layers of high-carbon and stainless steel samples, treated by both direct ion implantation of Sn + ions and radiation enhanced diffusion of tin, are analyzed by means of Rutherford backscattering and 119Sn and ... -
Computer simulation of dynamical anomalies in stretched water
(2004) [Journal article]In this work, we describe how the anomalous diffusivity is related to the structural anomalies. For this purpose, we study how the thermodynamics and the dynamics of low-temperature water are affected by the decrease of ... -
Cooperation in diffusive spatial games
(2007) [Journal article]Random diffusion is shown to be an important mechanism on fostering cooperative behavior among simple agents (memoryless, unconditional cooperators or defectors) living on a spatially structured environment. In particular, ... -
Diffusion enhancement in core-softened fluid confined in nanotubes
(2012) [Journal article]We study the effect of confinement in the dynamical behavior of a core-softened fluid. The fluid is modeled as a two length scales potential. This potential in the bulk reproduces the anomalous behavior observed in the ... -
Dynamics of thermal growth of silicon oxide films on Si
(2000) [Journal article]Thermal growth of silicon oxide films on Si in dry O₂ is modeled as a dynamical system, assuming that it is basically a reaction-diffusion phenomenon. Relevant findings of the last decade are incorporated, as structure and ... -
Effect of oxide overlayer formation on the growth of gold catalyzed epitaxial silicon nanowires
(2006) [Journal article]A direct dependence between the inadvertent formation of SiO2 on gold films deposited on silicon 111 substrates, and the nucleation and yield of epitaxial, gold catalyzed, silicon nanowires grown on such substrates is ... -
Effects of the attractive interactions in the thermodynamic, dynamic, and structural anomalies of a two length scale potential
(2010) [Journal article]Using molecular dynamic simulations, we study a system of particles interacting through a continuous core-softened potentials consisting of a hard core, a shoulder at closest distances, and an attractive well at further ... -
Entropy, diffusivity and the energy landscape of a waterlike fluid
(2010) [Journal article]Molecular dynamics simulations and instantaneous normal mode (INM) analysis of a fluid with core-softened pair interactions and waterlike liquid-state anomalies are performed to obtain an understanding of the relationship ... -
High pressure induced phase transition and superdiffusion in anomalous fluid confined in flexible nanopores
(2014) [Journal article]The behavior of a confined spherical symmetric anomalous fluid under high external pressure was studied with Molecular Dynamics simulations. The fluid is modeled by a core-softened potential with two characteristic length ... -
Influence of disordered porous media on the anomalous properties of a simple water model
(2015) [Journal article]The thermodynamic, dynamic, and structural behavior of a water-like system confined in a matrix is analyzed for increasing confining geometries. The liquid is modeled by a two-dimensional associating lattice gas model that ... -
Liquid crystal phase and waterlike anomalies in a core-softened shoulder-dumbbells system
(2010) [Journal article]Using molecular dynamics we investigate the thermodynamics, dynamics, and structure of 250 diatomic molecules interacting by a core-softened potential. This system exhibits thermodynamic, dynamic, and structural anomalies: ... -
Manifold reconnection in chaotic regimes
(1998) [Journal article]In this paper we extend the concept of separatrix reconnection into chaotic regimes. We show that even under chaotic conditions one can still understand enhanced diffusion in phase space in terms of relatively smooth ... -
A modification of Ångström's method that employs photothermal radiometry to measure thermal diffusivity : application to chemical deposited diamond
(1998) [Journal article]A modification of the one dimensional A ° ngstro¨m’s method that employs photothermal radiometry has been used to determine the longitudinal thermal diffusivity of three thin long bars of chemical vapor deposited diamond. ... -
Nitrogen diffusion enhancement in a ferrous alloy by deuterium isotopic effect
(2007) [Journal article]Studies of nitrogen implantation in an iron alloy using photoemission electron spectroscopy, sputtered neutral mass spectrometry, and elastic recoil detection analysis, reveal an enhancement of nitrogen diffusion when ... -
Patternig method for silicides based on local oxidation
(1995) [Journal article]Oxidation of CoSi2 layers on Si~100! using oxidation masks has been investigated. It is shown that local oxidation can be used to pattern the silicide layer. This method allows the formation of buried interconnects and ... -
Relation between occupation in the first coordination shells and widom line in core-softened potentials
(2013) [Journal article]Three core-softened families of potentials are checked for the presence of density and diffusion anomalies. These potentials exhibit a repulsive core with a softening region and at larger distances an attractive well. We ... -
Role of fluorine in suppressing boron transient enhanced diffusion in preamorphized Si
(2004) [Journal article]We have explained the role of fluorine in the reduction of the self-interstitial population in a preamorphized Si layer under thermal treatment. For this purpose, we have employed a B spike layer grown by molecular-beam ...
