Exploració per autor "García Ojalvo, Jordi"
Ara es mostren els items 3-22 de 41
-
Caos i atzar: juga la natura als daus?
(2010-05-03)
Audiovisual
Accés obert -
Collective excitability in a mesoscopic neuronal model of epileptic activity
(2018-01-12)
Article
Accés obertAt the mesoscopic scale, the brain can be understood as a collection of interacting neuronal oscillators, but the extent to which its sustained activity is due to coupling among brain areas is still unclear. Herewe address ... -
Collective stochastic coherence and synchronizability in weighted scale-free networks
(2014-01-21)
Article
Accés obertCoupling frequently enhances noise-induced coherence and synchronization in interacting nonlinear systems, but it does so separately. In principle collective stochastic coherence and synchronizability are incompatible ... -
Comparison between an exact and a heuristic neural mass model with second-order synapses
(Springer, 2022-12-01)
Article
Accés obertNeural mass models (NMMs) are designed to reproduce the collective dynamics of neuronal populations. A common framework for NMMs assumes heuristically that the output firing rate of a neural population can be described by ... -
Complex spatiotemporal oscillations emerge from transverse instabilities in large-scale brain networks
(Public Library of Science (PLOS), 2023-04-12)
Article
Accés obertSpatiotemporal oscillations underlie all cognitive brain functions. Large-scale brain models, constrained by neuroimaging data, aim to trace the principles underlying such macroscopic neural activity from the intricate and ... -
Consistency of heterogeneous synchronization patterns in complex weighted networks
(Institute of Physics (IOP), 2017-03-10)
Article
Accés obertSynchronization within the dynamical nodes of a complex network is usually considered homogeneous through all the nodes. Here we show, in contrast, that subsets of interacting oscillators may synchronize in different ways ... -
Controlling the leader-laggard dynamics in delay-synchronized lasers
(2007)
Article
Accés restringit per política de l'editorial -
Coupling-mediated ghost resonance in mutually injected lasers
(2005-03)
Article
Accés restringit per política de l'editorial -
Cross-frequency transfer in a stochastically driven mesoscopic neuronal model
(2015-02-16)
Article
Accés obertThe brain is known to operate in multiple coexisting frequency bands. Increasing experimental evidence suggests that interactions between those distinct bands play a crucial role in brain processes, but the dynamical ... -
Differentiating resting brain states using ordinal symbolic analysis
(Institute of Physics (IOP), 2018-10-08)
Article
Accés obertSymbolic methods of analysis are valuable tools for investigating complex time-dependent signals. In particular, the ordinal method defines sequences of symbols according to the ordering in which values appear in a time ... -
Dynamics of globally delay-coupled neurons displaying subthreshold oscillations
(2009-08)
Article
Accés restringit per política de l'editorialWe study an ensemble of neurons that are coupled through their time-delayed collective mean field. The individual neuron is modelled using a Hodgkin–Huxley-type conductance model with parameters chosen such that the uncoupled ... -
Excitation/inhibition patterns in a system of coupled cortical columns
(2014)
Text en actes de congrés
Accés restringit per política de l'editorialWe study how excitation and inhibition are distributed mesoscopically in small brain regions, by means of a computational model of coupled cortical columns described by neural mass models. Two cortical columns coupled ... -
Extracranial Estimation of Neural Mass Model Parameters Using the Unscented Kalman Filter
(2018-10-15)
Article
Accés obertData assimilation, defined as the fusion of data with preexisting knowledge, is particularly suited to elucidating underlying phenomena from noisy/insufficient observations. Although this approach has been widely used in ... -
Generation of spatiotemporal colored noise
(American Physical Society, 1992-10-01)
Article
Accés obertWe develop an algorithm to simulate a Gaussian stochastic process that is non-δ-correlated in both space and time coordinates. The colored noise obeys a linear reaction-diffusion Langevin equation with Gaussian white noise. ... -
Inducció magnètica: la llei de Faraday-Lenz
(2008-11-10)
Audiovisual
Accés obertFenomen de la inducció magnètica i la seva descripció matemàtica en base a la llei de Faraday-Lenz -
Information routing driven by background chatter in a signaling network
(2011-12-08)
Article
Accés obertLiving systems are capable of processing multiple sources of information simultaneously. This is true even at the cellular level, where not only coexisting signals stimulate the cell, but also the presence of fluctuating ... -
Lag alternance in unidirectional coupled semiconductor lasers
(2009)
Text en actes de congrés
Accés obert -
Mesoscopic Segregation of Excitation and Inhibition in a Brain Network Model
(2015-02-09)
Article
Accés obertNeurons in the brain are known to operate under a careful balance of excitation and inhibition, which maintains neural microcircuits within the proper operational range. How this balance is played out at the mesoscopic ... -
Modelos físicos de actividad cerebral: de la micro- a la macro-escala
(2012-09-01)
Article
Accés restringit per política de l'editorial -
Multi-stability and transient chaotic dynamics in semiconductor lasers with time-delayed optical feedback
(World Scientific Publishing, 2010)
Capítol de llibre
Accés restringit per política de l'editorialWe investigate numerically the chaotic transient dynamics of a semiconductor laser with time-delayed optical feedback. This transient behavior is seen in the low-frequency fluctuations (LFF) regime ocurring when the laser ...
