Search · four archives
Search · four archives
19 papers · ranked by Valyu relevance
Kora T. Montemagno, Arthur S. Courtin, Dounia Mulders, Francesca Fardo
While painful and non-painful thermal stimuli elicit a rich dynamical pattern of brain activity, canonical event related potentials (ERP) analyses quantify only limited aspects of this pattern. In this study, we complement the conventional ERP approach by quantifying the spatial and temporal differentiation of EEG…
Kora T. Montemagno, Arthur S. Courtin, Dounia Mulders, Francesca Fardo
The perturbational complexity index (PCI), grounded in systems dynamic and information theory, quantifies the brain’s capacity for differentiation and integration of neural activity. While it has been used to characterise consciousness states following transcranial magnetic stimulation, its responsiveness to sensory…
Martin Breyton, Jan Fousek, Giovanni Rabuffo, Pierpaolo Sorrentino + 6 more
Signatures of consciousness are found in spectral and temporal properties of neuronal activity. Among these, spatiotemporal complexity after a perturbation has recently emerged as a robust metric to infer levels of consciousness. Perturbation paradigms remain, however, difficult to perform routinely. To discover…
Ilaria Colombi, Thierry Nieus, Marcello Massimini, Michela Chiappalone + 1 more
'Michela Chiappalone' 'Giuseppe Giglia'] Dissociated cortical neurons in vitro display spontaneously synchronized, low-frequency firing patterns, which can resemble the slow wave oscillations characterizing sleep in vivo. Experiments in humans, rodents, and cortical slices have shown that awakening or the…
Renzo Comolatti, Andrea Pigorini, Silvia Casarotto, Matteo Fecchio + 13 more
The Perturbational Complexity Index (PCI) was recently introduced to assess the capacity of thalamocortical circuits to engage in complex patterns of causal interactions. While showing high accuracy in detecting consciousness in brain injured patients, PCI depends on elaborate experimental setups and offline processing…
Almudena Barbero-Castillo, Pedro Mateos-Aparicio, Leonardo Dalla Porta, Alessandra Camassa + 2 more
'Leonardo Dalla Porta' 'Alessandra Camassa' 'Lorena Perez-Mendez' 'Maria V. Sanchez-Vives'] Quantitative estimations of spatiotemporal complexity of cortical activity patterns are used in the clinic as a measure of consciousness levels, but the cortical mechanisms involved are not fully understood. We used a version of…
Charlotte Maschke, Jordan O’Byrne, Michele Angelo Colombo, Melanie Boly + 5 more
Consciousness has been proposed to be supported by electrophysiological patterns poised at criticality, a dynamical regime which exhibits adaptive computational properties, maximally complex patterns and divergent sensitivity to perturbation. Here, we investigated dynamical properties of the resting-state…
Jihao Long, Jiequn Han
Most existing theoretical analysis of reinforcement learning (RL) is limited to the tabular setting or linear models due to the difficulty in dealing with function approximation in high dimensional space with an uncertain environment. This work offers a fresh perspective into this challenge by analyzing RL in a general…
Dominique Makowski, An Shu Te, Tam Pham, Zen Juen Lau + 2 more
'S. H. Annabel Chen' 'Paolo Castiglioni'] Complexity quantification, through entropy, information theory and fractal dimension indices, is gaining a renewed traction in psychophsyiology, as new measures with promising qualities emerge from the computational and mathematical advances. Unfortunately, few studies compare…
Nancy Rebout, Jean-Christophe Lone, Arianna De Marco, Roberto Cozzolino + 2 more
'Roberto Cozzolino' 'Alban Lemasson' 'Bernard Thierry'] While there is no consensus about the definition of complexity, it is widely accepted that the ability to produce uncertainty is the most prominent characteristic of complex systems. We introduce new metrics that purport to quantify the complexity of living…
Jarosław Klamut, Ryszard Kutner, Zbigniew R. Struzik
Recently it has been argued that entropy can be a direct measure of complexity, where the smaller value of entropy indicates lower system complexity, while its larger value indicates higher system complexity. We dispute this view and propose a universal measure of complexity based on the Gell-Mann's view of complexity.…
Shaobo He, Chunbiao Li, Kehui Sun, Sajad Jafari
Designing a chaotic system with infinitely many attractors is a hot topic. In this paper, multiscale multivariate permutation entropy (MMPE) and multiscale multivariate Lempel-Ziv complexity (MMLZC) are employed to analyze the complexity of those self-reproducing chaotic systems with one-directional and two-directional…
Jurgen Riedel, Chris P. Barnes
In this study we examine the emergence of complex biological patterns through the lens of reaction-diffusion systems. We introduce two novel complexity metrics, Diversity of Number of States (DNOS) and Diversity of Pattern Complexity (DPC), which aim to quantify structural intricacies in pattern formation, enhancing…
Chen Bai, Wenhao Li, Xian-Hui Ge
The Jarzynski identity can describe small-scale nonequilibrium systems through stochastic thermodynamics. The identity considers fluctuating trajectories in a phase space. The complexity geometry frames the discussions on quantum computational complexity using the method of Riemannian geometry, which builds a bridge…
Dragutin T. Mihailović, Gordan Mimić, Emilija Nikolić-Ðorić, Ilija Arsenić
'Ilija Arsenić'] 1 Faculty of Agriculture, Division of Meteorology and Biophysics, University of Novi Sad, Dositeja Obradovica Sq. 8, 21000 Novi Sad, Serbia 2 Faculty of Sciences, Department of Physics, University of Novi Sad, Dositeja Obradovica Sq. 3, 21000 Novi Sad, Serbia 3 Faculty of Agriculture, Division of…
Luan Carlos de Sena Monteiro Ozelim, Abicumaran Uthamacumaran, Felipe S. Abrahão, Santiago Hernández-Orozco + 3 more
Naive Statistical Algorithms Authors: ['Luan Carlos de Sena Monteiro Ozelim' 'Abicumaran Uthamacumaran' 'Felipe S. Abrahão' 'Santiago Hernández-Orozco' 'Narsis A. Kiani' 'Jesper Tegnér' 'Héctor Zenil'] We give answer to an argument trying to show the divergence of Assembly Theory from LZ compression. We formally proved…
Brittany Story, Biswajit Sadhu, Henry Adams, Aurora Clark
Recent work (J. Chem. Phys. 154, 114114) has demonstrated that sublevelset persistent homology provides a compact representation of the complex features of an energy landscape in $3N$-dimensions. This includes information about all transition paths between local minima (connected by critical points of index > 1), and…
Jarosław Klamut, Ryszard Kutner, Zbigniew R. Struzik
Recently, it has been argued that entropy can be a direct measure of complexity, where the smaller value of entropy indicates lower system complexity, while its larger value indicates higher system complexity. We dispute this view and propose a universal measure of complexity that is based on Gell-Mann’s view of…
Laura Eslava, Sayle Sigarreta Ricardo, Arno Siri-Jégousse
We prove that the generalized Randić index over graphs following the Erdos-Rényi model, for both the sparse and dense regimes, is concentrated around its mean when the number of vertices tends to infinity.