نتایج جستجو برای: thermal entropy

تعداد نتایج: 279916  

Journal: :The Journal of chemical physics 2015
Fernando Barbosa V da Silva Fernando Albuquerque Oliveira Marco Aurélio A Barbosa

The thermodynamics and kinetics of the one dimensional lattice gas with repulsive interaction are investigated using transfer matrix technique and Monte Carlo simulations. This simple model is shown to exhibit waterlike anomalies in density, thermal expansion coefficient, and self-diffusion. An unified description for the thermodynamic anomalies in this model is achieved based on the ground sta...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2014
B Gaveau L Granger M Moreau L S Schulman

Many thermodynamic relations involve inequalities, with equality if a process does not involve dissipation. In this article we provide equalities in which the dissipative contribution is shown to involve the relative entropy (also called the Kullback-Leibler divergence). The processes considered are general time evolutions in both classical and quantum mechanics, and the initial state is someti...

2013
Michael Zakharov Michael Sadovsky

A novel model of thermal regulation of homoeothermic animals has been implemented. The model is based on a non-equilibrium thermodynamic approach which introduces entropy balance and the rate of entropy generation as a formulation of The Second Law. The model explains linear correlation between an animal’s skin and environment temperatures using the first principles and demonstrates the role of...

Journal: :International Journal of Energy and Environmental Engineering 2012

2014
Gershon Kurizki

Heat flow between a large “bath” and a smaller system brings them progressively closer to thermal equilibrium while increasing their entropy[1]. Deviations from this trend are fluctuations involving a small fraction of a statistical ensemble of systems interacting with the bath: in this respect, quantum and classical thermodynamics are in agreement[1, 2, 3, 4, 5]. Can there be drastic differenc...

1998
Y. Itoh M. Hotta M. Morikawa

We investigate the possibility of statistical explanation of the black hole entropy by counting quasi-bounded modes of thermal fluctuation in two dimensional black hole spacetime. The black hole concerned is quantum in the sense that it is in thermal equilibrium with its Hawking radiation. It is shown that the fluctuation around such a black hole obeys a wave equation with a potential whose pea...

2007
Saikat Guha Jeffrey H. Shapiro Baris I. Erkmen

Previous work on the classical information capacities of bosonic channels has established the capacity of the single-user pure-loss channel, bounded the capacity of the single-user thermal-noise channel, and bounded the capacity region of the multiple-access channel. The latter is a multiple-user scenario in which several transmitters seek to simultaneously and independently communicate to a si...

2006
Hisham A. Abdel-Aal

This paper examines the relationship between wear and the generation of entropy within the mechanically affected zone, MAZ, of a sliding material. It is postulated that wear is related to irreversible entropy generation within the MAZ. This accumulation takes a place due to the degradation in the ability of the rubbing material to maintain a noncongested flow of the generated entropy. This, in ...

Journal: :Entropy 2008
James Baker-Jarvis

The goal in this paper is to show how many high-frequency electromagnetic metrology areas can be understood and formulated in terms of entropy evolution, production, and fluctuations. This may be important in nanotechnology where an understanding of fluctuations of thermal and electromagnetic energy and the effects of nonequilibrium are particularly important. The approach used here is based on...

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