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- Presentation details - IFISC

the parametrically driven CGLE By Damià Gomila Pere Colet Maxi San Miguel Gian Luca Oppo 2008 Fitxers PCGLE without movies pdf 910 24 KB Tornar a la llista de presentacions Cerca presentacions Conté la paraula es Operador AND OR NOT

Original URL path: http://ifisc.uib-csic.es/presentations/presentation-detail.php?indice=54 (2016-02-15)

Open archived version from archive - Presentation details - IFISC

in modelling this complex state by a stochastic partial differential equation This equation requires both a bistable potential and a multiplicative noise term which vanishes at the metastable state An interesting feature of the model is that it displays a noise induced transition from laminarity to the STI regime We show by numerical simulations and a mean field analysis that for high noise intensities the system globally evolves to a

Original URL path: http://ifisc.uib-csic.es/presentations/presentation-detail.php?indice=57 (2016-02-15)

Open archived version from archive - Presentation details - IFISC

Noise beyond the ears Stochastic processes Some biological applications in Spanish By Raúl Toral 2008 Fitxers ruido pdf 21 03 MB Tornar a la llista de presentacions Cerca presentacions Conté la paraula es Operador AND OR NOT Paraules adicionals Línia

Original URL path: http://ifisc.uib-csic.es/presentations/presentation-detail.php?indice=60 (2016-02-15)

Open archived version from archive - 2D-Ising Applet

fix the values of temperature or magnetic field by toggling the corresponding buttons The two panels at the right show the instantaneous values of the magnetization versus T and H Start Stop the simulation with the buttons Pause the simulation with the button The simulation will continue with the same parameters as before Disclaimer on Internet Explorer This applet seems not to load gracefully on Internet Explorer but it correctly

Original URL path: http://ifisc.uib-csic.es/research/applet_complex/bidimensional/JIsing.php (2016-02-15)

Open archived version from archive - Claudio J. TESSONE (tessonec) :::~ personal page

this article can be found on line in the arXiv repository or in the IMEDEA web page Here you can find the oral presentation I presented in the FisEs 05 in Madrid The presentation is available in Spanish and in English How does the dynamics of this system look like This question is answered if you play with the active rotator applet The three region described in the paper can

Original URL path: http://ifisc.uib-csic.es/research/applet_complex/work/topics/act-rot/index.php (2016-02-15)

Open archived version from archive - Mass media interaction

Global cultural trend Spatially uniform and time dependent cultural field At each time step the components of the field take the most abundant value exhibited by the F th component of all the state vectors in the system It gives a global coupling function of all the elements in the system It can be interpreted as a global mass media influence which feeds back into the system the dominant global cultural trend iii Local field Local cultural trend Spatially non uniform and time dependent cultural field At each time step the component of the field at node i takes the most frequent value in component F of the state vectors of the elements in the von Neumann neighborhood of element i It can be interpreted as a local mass media regional broadcast which feeds back into the system the local dominant cultural trend References 1 R Axelrod J Conflict Res 41 203 1997 Related material by R Axelrod 2 K Klemm V M Eguíluz R Toral M San Miguel Global culture A noise induced transition in finite systems Phys Rev E 67 045101 R 2003 3 K Klemm V M Eguí luz R Toral M San Miguel Nonequilibrium transitions in complex networks a model of social interaction Phys Rev E 67 026120 2003 4 Globalization Polarization Cultural Drift and Social Networks A presentation in pdf 5 An analysis of the dissemination of culture in a one dimensional world can be found in K Klemm Victor M Eguí luz R Toral M San Miguel Globalization Polarization and Cultural Drift J Economic Dynamics Control 29 321 2005 See also Role of dimensionality in Axelrod s model for the dissemination of culture Physica A 327 1 2003 6 Review paper on Voter and Axelord s models M San Miguel et al Binary and multivariate stochastic models of consensus formation Computing in Science and Engineering 7 Issue 6 67 2005 7 J C González Avella M G Cosenza K Tucci Nonequilibrium transition induced by mass media in a model for social influence Phys Rev E 72 065102 R 2005 8 J C González Avella V M Eguí luz M G Cosenza K Klemm J L Herrera and M San Miguel Local versus global interactions in nonequilibrium transitions A model of social dynamics Phys Rev E 73 046119 2006 9 J C González Avella M G Cosenza K Klemm V M Eguí luz and M San Miguel I nformation Feedback and Mass Media Effects in Cultural Dynamics Journal of Artificial Societies and Social Simulation http jasss soc surrey ac uk 10 3 9 html 10 1 17 2006 10 Mass Media Effects in Culrural Dynamics The power of being subtle A presentation in pdf 11 D Centola J C González Avella V M Eguiluz and M San Miguel Homophily Cultural Drift and the Co Evolution of Cultural Groups Journal of Conflict Resolution arXiv physics 0609213 2007 12 F Vazquez J C González Avella V M Eguiluz and M San Miguel Time scale competition leading to

Original URL path: http://ifisc.uib-csic.es/research/APPLET_Axelrod/Culture.html (2016-02-15)

Open archived version from archive - Dissemination of Culture (Axelrod)

7 PDF Presentation of the effects of mass media in cultural dynamics J C Gonzalez Avella et al Physical Review E 73 046119 2006 A guide for using the applet Here it is assumed that you are familiar with the dynamical rules of the model If not reference 2 above should be helpful and buttons increase decrease the basic model parameters L is the linear size of the square lattice Increasing decreasing L fine coarse grains the current configuration However the new larger smaller lattice is generated independently of the old one relevant in the case p 0 F is the number of features Changing F while the dynamics is running or between setting different kinds of initial configurations allows you to play many tricks Try it out q is the number of traits used in the random initial configuration for perturbations and the ongoing noise r 0 r is the noise rate When r is increased from zero the state of the applet is changed to running automatically p is the small world parameter the probability of randomly rewiring a bond of the lattice Any change made to p creates a new random lattice The time is the number of elementary epochs divided by the system size In one time unit each site performs on average one update trial Stop Go allows you to toggle the state of the applet between running and paused If r 0 and the current configuration is absorbing no updates are possible and the state of the applet is displayed as frozen Perturbation assigns a random new trait out of 1 q to a randomly chosen feature at a randomly chosen site The homogeneous initial configuration assigns the same trait to all features in all sites The random initial configuration assigns an independent random

Original URL path: http://ifisc.uib-csic.es/research/socio/culture.html (2016-02-15)

Open archived version from archive - Applet HTML Page

use A red B black or AB bilingual white of each agent is randomly distributed Set by default strip like i c half of the lattice is using language A red while the other half is using language B black AB init domain half of the lattice is bilingual white while the other half is monolingual A red INPUT parameters of the model L linear dimension of the lattice Size of the system N L x L s 0 s red The social prestige of language B black is 1 s The case s 0 5 is the case of socially equivalent languages Language A is preferred for s 0 5 a a 0 volatility or persistence parameter The case a 1 is the marginal situation where the transition probabilities depend linearly on the densities of speakers A high volatility regime regime exists for a low volatility regime exists for a 1 with a probability of changing language state below the marginal case Note that you can change the parameters a and s during the dynamics with the corresponding buttons OUTPUT The instantaneous value of the following quantities are given density A density B density AB densities of speakers of each linguistic group A B and AB ρ average interface density defined as the density of links joining two agents in a different state The inverse of ρ gives an average linear measure of a monolinguistic domain Decreasing ρ shows that linguistic domains are being formed and grow in time When ρ 0 the dynamics reaches a final absorbing state with every agent using the same language time unit of time of the simulation A unit of time includes N iterations of the dynamics so that each agent has been updated on average once every unit of time Exploring the parameter space As a guide to explore the parameter space to observe different qualitative dynamical behavior you can use the following parameter values System size of N 64 set by default is the best size to understand the dynamics Random initial conditions are set by default Parameter space a s Note that it is interesting to change parameters during the time evolution of the dynamics Specially moving from the default case a 1 s 0 5 to the other multiple situations described below 1 Marginal volatility a 1 1 1 a 1 s 0 5 Case of socially equivalent languages We observe formation and growth of monolingual domains After a long time a finite size fluctuation drives the system to consensus on one of the two languages and extinction of the other In the Abrams Strogatz model the dynamics is driven by interfacial noise Voter Model like while in the Bilinguals model dynamics is curvature driven and bilingual agents do not form domains but remain at the interfaces between monolingual ones Starting the Bilinguals model from random initial conditions 1 3 of the times the system gets trapped in stripe like dynamical metastable states where the system remains in dynamical

Original URL path: http://ifisc.uib-csic.es/research/complex/APPLET_LANGDYN.html (2016-02-15)

Open archived version from archive