Path integrals, particular kinds, and strange things

K Friston, L Da Costa, DAR Sakthivadivel, C Heins… - Physics of Life …, 2023 - Elsevier
This paper describes a path integral formulation of the free energy principle. The ensuing
account expresses the paths or trajectories that a particle takes as it evolves over time. The …

25 years of self-organized criticality: solar and astrophysics

MJ Aschwanden, NB Crosby, M Dimitropoulou… - Space Science …, 2016 - Springer
Shortly after the seminal paper “Self-Organized Criticality: An explanation of 1/f noise” by
Bak et al.(1987), the idea has been applied to solar physics, in “Avalanches and the …

Parcels and particles: Markov blankets in the brain

KJ Friston, ED Fagerholm, TS Zarghami, T Parr… - Network …, 2021 - direct.mit.edu
At the inception of human brain mapping, two principles of functional anatomy underwrote
most conceptions—and analyses—of distributed brain responses: namely, functional …

Stochastic chaos and Markov blankets

K Friston, C Heins, K Ueltzhöffer, L Da Costa, T Parr - Entropy, 2021 - mdpi.com
In this treatment of random dynamical systems, we consider the existence—and
identification—of conditional independencies at nonequilibrium steady-state. These …

A new nine-dimensional chaotic lorenz system with quaternion variables: complicated dynamics, electronic circuit design, anti-anticipating synchronization, and …

EE Mahmoud, M Higazy, TM Al-Harthi - Mathematics, 2019 - mdpi.com
In this paper, a chaotic quaternion autonomous nonlinear structure is introduced and intends
to be a contribution. It is the first nonlinear dynamical system with quaternion variables to be …

Scale Invariance in Gamma-Ray Flares of the Sun and 3C 454.3

FK Peng, JJ Wei, HQ Wang - The Astrophysical Journal, 2023 - iopscience.iop.org
Using the gamma-ray flare samples of the Sun and 3C 454.3 observed by the Fermi
telescope, we investigate the statistical properties of sizes including fluence (energy), peak …

Universality of non-extensive Tsallis statistics and time series analysis: Theory and applications

GP Pavlos, LP Karakatsanis, MN Xenakis… - Physica A: Statistical …, 2014 - Elsevier
We investigate Tsallis q-statistics for various complex physical systems. In particular, the
Tsallis q-triplet is estimated for space plasmas, atmospheric dynamics, seismicity, and brain …

Tsallis non-extensive statistics and solar wind plasma complexity

GP Pavlos, AC Iliopoulos, GN Zastenker… - Physica A: Statistical …, 2015 - Elsevier
This article presents novel results revealing non-equilibrium phase transition processes in
the solar wind plasma during a strong shock event, which took place on 26th September …

Tsallis non-extensive statistics, intermittent turbulence, SOC and chaos in the solar plasma. Part two: Solar flares dynamics

LP Karakatsanis, GP Pavlos, MN Xenakis - Physica a: Statistical mechanics …, 2013 - Elsevier
In this study which is the continuation of the first part (Pavlos et al. 2012)[1], the nonlinear
analysis of the solar flares index is embedded in the non-extensive statistical theory of …

Generalization of the possible algebraic basis of q-triplets

C Tsallis - The European Physical Journal Special Topics, 2017 - Springer
The so called q-triplets were conjectured in 2004 [C. Tsallis, Physica A 340, 1 (2004)] and
then found in nature in 2005 [LF Burlaga, AF Vinas, Physica A 356, 375 (2005)]. A relevant …