Results 11 to 20 of about 120,755 (193)

Rényi Entropy in Statistical Mechanics

open access: yesEntropy, 2022
Rényi entropy was originally introduced in the field of information theory as a parametric relaxation of Shannon (in physics, Boltzmann–Gibbs) entropy. This has also fuelled different attempts to generalise statistical mechanics, although mostly skipping
Jesús Fuentes, Jorge Gonçalves
doaj   +1 more source

Implicit Type Constitutive Relations for Elastic Solids and Their Use in the Development of Mathematical Models for Viscoelastic Fluids

open access: yesFluids, 2021
Viscoelastic fluids are non-Newtonian fluids that exhibit both “viscous” and “elastic” characteristics in virtue of the mechanisms used to store energy and produce entropy.
Vít Průša, K. R. Rajagopal
doaj   +1 more source

Finite-strain thermoelasticity based on multiplicative decomposition of deformation gradient [PDF]

open access: yesTheoretical and Applied Mechanics, 2002
The constitutive formulation of the finite-strain thermoelasticity is revisited within the thermodynamic framework and the multiplicative decomposition of the deformation gradient into its elastic and thermal parts.
Vujošević L., Lubarda V.A.
doaj   +1 more source

Exploring the Interfacial Reaction of Nano Al/CuO Energetic Films through Thermal Analysis and Ab Initio Molecular Dynamics Simulation

open access: yesMolecules, 2022
The effect of the interface layer on energy release in nanoenergetic composite films is important and challenging for the utilization of energy. Nano Al/CuO composite films with different modulation periods were prepared by magnetron sputtering and ...
Anran Shi   +7 more
doaj   +1 more source

NMR chemical shift as analytical derivative of the Helmholtz free energy [PDF]

open access: yesThe Journal of Chemical Physics, 2013
We present a theory for the temperature-dependent nuclear magnetic shielding tensor of molecules with arbitrary electronic structure. The theory is a generalization of Ramsey's theory for closed-shell molecules. The shielding tensor is defined as a second derivative of the Helmholtz free energy of the electron system in equilibrium with the applied ...
Van Den Heuvel W., Soncini A.
openaire   +3 more sources

Some Thermodynamic Aspects of Black Holes and Singularities [PDF]

open access: yes, 1996
We review and correct the classical critical exponents characterizing the transition from negative to positive black hole's heat capacity at high charge--angular momentum.
Lousto, C. O.
core   +2 more sources

Superstatistics of Schrödinger equation with pseudo-harmonic potential in external magnetic and Aharanov-Bohm fields

open access: yesHeliyon, 2020
In this work, the thermodynamic properties of pseudo-harmonic potential in the presence of external magnetic and Aharanov-Bohm fields are investigated. The effective Boltzmann factor in the superstatistics formalism was used to obtain the thermodynamic ...
A.N. Ikot   +7 more
doaj   +1 more source

Vibrational Internal Energy And Helmholtz Free Energy Of Metals

open access: yesTurkish Journal of Computer and Mathematics Education (TURCOMAT), 2021
This article revealed an interesting issue on vibrational internal energy and Helmholtz free energy of metals. The relationship existing between the lateral strain and axial strain was taking into consideration during computation. Vibrational internal energy and Helmholtz free energy of metals was computed and studied based on the theory of free ...
openaire   +1 more source

THERMODYNAMIC PROPERTIES OF ROCK-FORMING OXIDES, α-Al2O3, Cr2O3, α-Fe2O3, AND Fe3O4 AT HIGH TEMPERATURES AND PRESSURES

open access: yesГеодинамика и тектонофизика, 2016
Equations of state of corundum (α-Al2O3), eskolaite (Cr2O3), hematite (α-Fe2O3), and magnetite (Fe3O4) are constructed based on the Helmholtz free energy by simultaneous optimization of ultrasonic, X-ray diffraction, dilatometric, and thermochemical ...
P. I. Dorogokupets   +3 more
doaj   +1 more source

The hindered rotor density-of-states interpolation function [PDF]

open access: yes, 1997
We construct an approximation to the partition function for hindered rotors based entirely on their asymptotic behavior and no fitting parameters. The approximant is shown to be quite accurate in all temperature ranges.
Flagan, Richard C.   +2 more
core   +1 more source

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