Results 21 to 30 of about 188,099 (285)

A Photon Force and Flow for Dissipative Structuring: Application to Pigments, Plants and Ecosystems

Entropy, 2022
Through a modern derivation of Planck’s formula for the entropy of an arbitrary beam of photons, we derive a general expression for entropy production due to the irreversible process of the absorption of an arbitrary incident photon spectrum in material ...
Karo Michaelian, Ramón Eduardo Cano Mateo   +1 more
doaj   +1 more source

Entropy production in thermal phase separation: a kinetic-theory approach [PDF]

Soft Matter, 2019
Entropy production during the process of thermal phase-separation of multiphase flows is investigated by means of a discrete Boltzmann kinetic model.
Yudong Zhang, Aiguo Xu, Guangcai Zhang, Yanbiao Gan, Zhihua Chen, Sauro Succi   +5 more
openaire   +3 more sources

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

, 2010
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.
Pigolotti, S., Puglisi, A., Rondoni, L., Vulpiani, A.   +3 more
core   +4 more sources

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

Entropy, 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

Nuclear 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

Nature 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, Masanao Igarashi, Hideaki Shimazaki   +2 more
doaj   +1 more source

Microscopic approach to entropy production [PDF]

, 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., Löwen, Hartmut, Wittkowski, Raphael   +2 more
core   +1 more source

The Character of Entropy Production in Rayleigh–Bénard Convection

Entropy, 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]

Philosophical 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

Проблеми 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, S.V. Lysenko, A.V. Hrynkiv, D.V. Holub   +3 more
doaj   +1 more source