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  • Publication details - IFISC
    model in the spatiotemporally chaotic regime may be understood in terms of localized dynamics in both space and scale wavenumber A projection onto a Daubechies basis yields a good separation of scales as shown by an examination of the contribution of different wavelet levels to the power spectrum At most scales including the most energetic ones we find essentially Gaussian dynamics We also show that removal of certain wavelet modes

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=418 (2016-02-15)
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  • Publication details - IFISC
    written as a sl vector complex Ginzburg Landau equation Dynamical properties of localized structures of topological character in this vector field case are considered Creation and annihilation processes of different kinds of vector defects are described and some of them interpreted in theoretical terms A transition between different regimes of spatiotemporal dynamics is described Keywords Vector Ginzburg Landau equation VCGL topological defects spatiotemporal chaos optical instabilities light polarization Related material

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=440 (2016-02-15)
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  • Publication details - IFISC
    coherence resonance effect for coupled excitable systems Namely we demonstrate numerically that the regularity in the signal emitted by an ensemble of globally coupled FitzHugh Nagumo systems under excitation by independent noise sources is optimal for a particular value of the number of coupled systems This resonance is shown through several different dynamical measures the time correlation function correlation time and jitter Fitxers Tornar a la llista de publicacions Cerca

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=997 (2016-02-15)
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  • Publication details - IFISC
    Noise Letters 2 4 R161 R174 2002 We demonstrate the concept of bailout embedding a general process for obtaining order from chaotic dynamics by embedding the system within another larger one Such an embedding can target islands of order and hence control chaos Moreover a small amount of noise enhances this process Fitxers FNL2 pdf 1253127 Bytes Tornar a la llista de publicacions Cerca publicacions Conté la paraula es Operador

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=550 (2016-02-15)
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  • Publication details - IFISC
    embeddings of three dimensional volume preserving maps to study qualitatively the dynamics of small spherical neutrally buoyant impurities suspended in a time periodic incompressible fluid flow The accumulation of impurities in tubular vortical structures the detachment of particles from fluid trajectories near hyperbolic invariant lines and the formation of nontrivial three dimensional structures in the distribution of particles are predicted Fitxers PRL89 pdf 752235 Bytes Tornar a la llista de

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=521 (2016-02-15)
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  • Publication details - IFISC
    First Passage Time MFPT for diffusion in fluctuating media We exploit van Kampen s technique of composite stochastic processes obtaining analytical expressions for the MFPT for a general system and focus on the two state case where the transitions between the states are modelled introducing both Markovian and non Markovian processes The comparison between the analytical and simulations results show an excellent agreement Fitxers JoBuWiTrap pdf 98128 Bytes Tornar a

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=587 (2016-02-15)
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  • Publication details - IFISC
    with ecological systems we find that the simplest case of such models shows a kind of competitive exclusion principle However the inclusion of terms corresponding to ecological intracompetition shows that if such parameters overcome certain threshold values the meaning of strong and weak companies should be redefined Also by adequately adjusting such a parameter a company can induce the extinction of one or more of its competitors Fitxers CompeteCom pdf

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=586 (2016-02-15)
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  • Publication details - IFISC
    open and closed For both of them three distinct regimes are found depending on the relative strengths of the stirring and the rate of the excitable reaction In order to clarify and understand the role of the many competing mechanisms present simplified models of the process are introduced They are one dimensional baker map models for the flow and a one dimensional approximation for the transverse profile of the filaments

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=571 (2016-02-15)
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