Results 21 to 30 of about 11,320,320 (289)

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

open access: yesEntropy, 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   +1 more
doaj   +1 more source

Nonequilibrium Quantum Impurities: From Entropy Production to Information Theory [PDF]

open access: yesPhysical Review Letters, 2008
5 pages, 1 figure new version with minor ...
Mehta, Pankaj, Andrei, Natan
openaire   +3 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

On Entropy Production of Repeated Quantum Measurements I. General Theory [PDF]

open access: yesCommunications in Mathematical Physics, 2017
We study entropy production (EP) in processes involving repeated quantum measurements of finite quantum systems. Adopting a dynamical system approach, we develop a thermodynamic formalism for the EP and study fine aspects of irreversibility related to the hypothesis testing of the arrow of time.
Benoist, Tristan   +3 more
openaire   +2 more sources

New Inequalities for Convex Functions with Applications for the N-Entropy of a Discrete Random Variable [PDF]

open access: yes, 1999
New inequalities for convex mappings of a real variable and applications in Information Theory for Shannon's entropy are ...
Dragomir, Sever S
core   +6 more sources

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

Suppressing the Vortex Rope Oscillation and Pressure Fluctuations by the Air Admission in Propeller Hydro-Turbine Draft Tube [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
For the purpose of automatic generation control (AGC), a portion of the propeller hydro-turbine units in China is adjusted to operate within a restricted range of 75%-85% load using computer-controlled AGC strategies.
H. Wu   +9 more
doaj   +1 more source

Microscopic theory for the time irreversibility and the entropy production [PDF]

open access: yesJournal of Statistical Mechanics: Theory and Experiment, 2018
Abstract In stochastic thermodynamics, the entropy production of a thermodynamic system is defined by the irreversibility measured by the logarithm of the ratio of the path probabilities in the forward and reverse processes. We derive the relation between the irreversibility and the entropy production starting from the deterministic ...
Chun, Hyun-Myung, Dong Noh, Jae
openaire   +2 more sources

Theory and simulation of shock waves: Entropy production and energy conversion [PDF]

open access: yesPhysical Review E, 2021
We have considered a shock wave as a surface of discontinuity and computed the entropy production using non-equilibrium thermodynamics for surfaces. The results from this method, which we call the "Gibbs excess method" (GEM), were compared with results from three alternative methods, all based on the entropy balance in the shock front region, but with ...
Bjørn Hafskjold   +3 more
openaire   +5 more sources

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

Home - About - Disclaimer - Privacy