Results 11 to 20 of about 10,879,472 (249)

Reconsideration of Temperature Determined by the Excited-State Population Distribution of Hydrogen Atoms Based on Tsallis Entropy and Its Statistics in Hydrogen Plasma in Non-Equilibrium State

open access: yesEntropy, 2023
In non-equilibrium plasmas, the temperature cannot be uniquely determined unless the energy-distribution function is approximated as a Maxwell–Boltzmann distribution.
Koji Kikuchi, Hiroshi Akatsuka
doaj   +2 more sources

Calculation of the Entropy Balance Equation in a Non-equilibrium Reaction-diffusion System

open access: yesEntropy, 2010
In this article, we discuss the relationships between thermodynamic quantities and the spatial pattern in a reaction-diffusion model based on the reversible Gray-Scott model.
Tomohiko Yamaguchi, Hitoshi Mahara
doaj   +2 more sources

Entropy Principle and Recent Results in Non-Equilibrium Theories [PDF]

open access: yesEntropy, 2014
We present the state of the art on the modern mathematical methods of exploiting the entropy principle in thermomechanics of continuous media. A survey of recent results and conceptual discussions of this topic in some well-known non-equilibrium theories
Vito Antonio Cimmelli   +3 more
doaj   +2 more sources

Modeling Non-Equilibrium Dynamics of a Discrete Probability Distribution: General Rate Equation for Maximal Entropy Generation in a Maximum-Entropy Landscape with Time-Dependent Constraints [PDF]

open access: yesEntropy, 2008
A rate equation for a discrete probability distribution is discussed as a route to describe smooth relaxation towards the maximum entropy distribution compatible at all times with one or more linear constraints. The resulting dynamics follows the path of
Gian Paolo Beretta
doaj   +2 more sources

The Maximum Entropy Production Principle: Its Theoretical Foundations and Applications to the Earth System [PDF]

open access: yes, 2010
The Maximum Entropy Production (MEP) principle has been remarkably successful in producing accurate predictions for non-equilibrium states. We argue that this is because the MEP principle is an effective inference procedure that produces the best ...
Axel Kleidon   +4 more
core   +2 more sources

Free and classical entropy over the circle. [PDF]

open access: yes, 2007
Relative entropy with respect to normalized arclength measure on the circle is greater than or equal to the negative logarithmic energy (Voiculescu's negative free entropy) and is greater than or equal to the modified relative free entropy.
Blower, Gordon
core   +4 more sources

Estimating time-dependent entropy production from non-equilibrium trajectories

open access: yesCommunications Physics, 2022
While methods for estimating the entropy production rate of a stationary process are relatively well established, this is still a challenge in non-stationary conditions.
Shun Otsubo   +3 more
doaj   +1 more source

Fluctuation theorem between non-equilibrium states in an RC circuit

open access: yesNew Journal of Physics, 2015
Fluctuation theorems impose constraints on the probability of observing negative entropy production in small systems driven out of equilibrium. The range of validity of fluctuation theorems has been extensively tested for transitions between equilibrium ...
L Granger   +4 more
doaj   +1 more source

An introduction to the non-equilibrium steady states of maximum entropy spike trains [PDF]

open access: yes, 2019
Although most biological processes are characterized by a strong temporal asymmetry, several popular mathematical models neglect this issue. Maximum entropy methods provide a principled way of addressing time irreversibility, which leverages powerful ...
Rodrigo Cofré   +5 more
core   +1 more source

MRNG: Accessing Cosmic Radiation as an Entropy Source for a Non-Deterministic Random Number Generator [PDF]

open access: yes, 2023
Privacy and security require not only strong algorithms but also reliable and readily available sources of randomness. To tackle this problem, one of the causes of single-event upsets is the utilization of a non-deterministic entropy source, specifically
Wolfgang Slany   +9 more
core   +1 more source

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