Search Results for author: Daniele Marinazzo

Found 10 papers, 6 papers with code

Higher-order mutual information reveals synergistic sub-networks for multi-neuron importance

no code implementations1 Nov 2022 Kenzo Clauw, Sebastiano Stramaglia, Daniele Marinazzo

Quantifying which neurons are important with respect to the classification decision of a trained neural network is essential for understanding their inner workings.

Representation Learning

Cognitive modelling with multilayer networks: Insights, advancements and future challenges

no code implementations2 Oct 2022 Massimo Stella, Salvatore Citraro, Giulio Rossetti, Daniele Marinazzo, Yoed N. Kenett, Michael S. Vitevitch

Cognitive multilayer networks can map multiple types of information at once, thus capturing how different layers of associations might co-exist within the mental lexicon and influence cognitive processing.

Community Detection

Frontal effective connectivity increases with task demands and time on task: a Dynamic Causal Model of electrocorticogram in macaque monkeys

no code implementations21 Feb 2022 Katharina Wegner, Charles R. E. Wilson, Emmanuel Procyk, Karl J. Friston, Frederik Van de Steen, Dimitris A. Pinotsis, Daniele Marinazzo

We apply Dynamic Causal Models to electrocorticogram recordings from two macaque monkeys performing a problem-solving task that engages working memory, and induces time-on-task effects.

Quantifying dynamical high-order interdependencies from the O-information: an application to neural spiking dynamics

1 code implementation31 Jul 2020 Sebastiano Stramaglia, Tomas Scagliarini, Bryan C. Daniels, Daniele Marinazzo

We address the problem of efficiently and informatively quantifying how multiplets of variables carry information about the future of the dynamical system they belong to.

Synergy as a warning sign of transitions: the case of the two-dimensional Ising model

1 code implementation16 Jan 2019 Daniele Marinazzo, Leonardo Angelini, Mario Pellicoro, Sebastiano Stramaglia

We consider the formalism of information decomposition of target effects from multi-source interactions, i. e. the problem of defining unique, redundant (or shared), and synergistic (or complementary) components of the information that a set of source variables provides about a target, and apply it to the two-dimensional Ising model as a paradigm of a critically transitioning system.

Statistical Mechanics

Multiscale Granger causality analysis by à trous wavelet transform

1 code implementation12 Jul 2017 Sebastiano Stramaglia, Iege Bassez, Luca Faes, Daniele Marinazzo

Since interactions in neural systems occur across multiple temporal scales, it is likely that information flow will exhibit a multiscale structure, thus requiring a multiscale generalization of classical temporal precedence causality analysis like Granger's approach.

EEG

Kernel Granger causality and the analysis of dynamical networks

1 code implementation20 Mar 2008 Daniele Marinazzo, Mario Pellicoro, Sebastiano Stramaglia

We apply the proposed approach to a network of chaotic maps and to a simulated genetic regulatory network: it is shown that the underlying topology of the network can be reconstructed from time series of node's dynamics, provided that a sufficient number of samples is available.

Disordered Systems and Neural Networks Exactly Solvable and Integrable Systems Quantitative Methods

Kernel method for nonlinear Granger causality

1 code implementation16 Nov 2007 Daniele Marinazzo, Mario Pellicoro, Sebastiano Stramaglia

Important information on the structure of complex systems, consisting of more than one component, can be obtained by measuring to which extent the individual components exchange information among each other.

Disordered Systems and Neural Networks Exactly Solvable and Integrable Systems

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