Results 31 to 40 of about 442,315 (312)

Entropy production and coarse-graining in Markov processes [PDF]

open access: yes, 2001
We study the large time fluctuations of entropy production in Markov processes. In particular, we consider the effect of a coarse-graining procedure which decimates {\em fast states} with respect to a given time threshold.
Puglisi, A.   +3 more
core   +4 more sources

An Information-Theoretic Analysis of Flexible Efficient Cognition for Persistent Sustainable Production

open access: yesEntropy, 2020
Amidst certainty, efficiency can improve sustainability by reducing resource consumption. However, flexibility is needed to be able to survive when uncertainty increases. Apropos, sustainable production cannot persist in the long-term without having both
Stephen Fox, Adrian Kotelba
doaj   +1 more source

Entanglement entropy of N=2⁎ de Sitter vacuum

open access: yesNuclear Physics B, 2019
de Sitter vacuum of nonconformal gauge theories is non-equilibrium, manifested by a nonvanishing rate of the comoving entropy production at asymptotically late times.
Alex Buchel
doaj   +1 more source

Nonequilibrium thermodynamics of the asymmetric Sherrington-Kirkpatrick model

open access: yesNature Communications, 2023
Most natural systems operate far from equilibrium, displaying time-asymmetric, irreversible dynamics characterized by a positive entropy production while exchanging energy and matter with the environment.
Miguel Aguilera   +2 more
doaj   +1 more source

Microscopic approach to entropy production [PDF]

open access: yes, 2012
It is a great challenge of nonequilibrium statistical mechanics to calculate entropy production within a microscopic theory. In the framework of linear irreversible thermodynamics, we combine the Mori-Zwanzig-Forster projection operator technique with ...
Brand, Helmut R.   +2 more
core   +1 more source

The Character of Entropy Production in Rayleigh–Bénard Convection

open access: yesEntropy, 2014
In this study; the Rayleigh–Bénard convection model was established; and a great number of Bénard cells with different numbered vortexes were acquired by numerical simulation.
Chenxia Jia, Chengjun Jing, Jian Liu
doaj   +1 more source

Maximum entropy production and plant optimization theories [PDF]

open access: yesPhilosophical Transactions of the Royal Society B: Biological Sciences, 2010
Plant ecologists have proposed a variety of optimization theories to explain the adaptive behaviour and evolution of plants from the perspective of natural selection (‘survival of the fittest’). Optimization theories identify some objective function—such as shoot or canopy photosynthesis, or growth rate—which is maximized with respect to one or more ...
openaire   +3 more sources

Thermodynamic substantiation of the direction of nonequilibrium processes in triadconjugations of machine parts based on the principles of maximum and minimum entropy

open access: yesПроблеми трибології, 2022
The article gives a thermodynamic substantiation of the direction of nonequilibrium processes in tribocouples of machine parts, in tribosystems, based on the principles of maximum and minimum entropy.
V.V. Aulin   +3 more
doaj   +1 more source

Entropy production by resonance decays [PDF]

open access: yes, 1996
We investigate entropy production for an expanding system of particles and resonances with isospin symmetry -- in our case pions and $\rho$ mesons -- within the framework of relativistic kinetic theory. A cascade code to simulate the kinetic equations is
A. L. Fetter   +21 more
core   +2 more sources

The Role of Vegetation on the Ecosystem Radiative Entropy Budget and Trends Along Ecological Succession

open access: yesEntropy, 2014
Ecosystem entropy production is predicted to increase along ecological succession and approach a state of maximum entropy production, but few studies have bridged the gap between theory and data.
Paul C. Stoy   +4 more
doaj   +1 more source

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