Results 31 to 40 of about 11,355 (304)

Some Variational Principles for Coupled Thermoelasticity

open access: yesJournal of Engineering, 2013
The nonlinear thermoelasticity of type II proposed by Green and Naghdi is considered. The thermoelastic structural model is formulated in a quasistatic range, and the related thermoelastic variational formulation in the complete set of state variables is
Francesco Marotti de Sciarra
doaj   +1 more source

Neumann's method to solve boundary problems of elastic thin shells [PDF]

open access: yesКомпьютерные исследования и моделирование, 2015
This paper studies possibilities to use Neumann's method to solve boundary problems of elastic thin shells. Variational statement of statical problems for shells allows examining the problems within the space of distributions.
Yu. S. Nayshtut
doaj   +1 more source

Bergson and the Heptapods

open access: yesBergsoniana, 2021
Given Bergson’s commitment to a dynamic conception of time and an open future it seems likely that he would not have welcomed developments in physics which suggest that we live in an eternal four-dimensional block-universe.
Barry Dainton
doaj   +1 more source

A Variational Principle in Krein Space [PDF]

open access: yesTransactions of the American Mathematical Society, 1994
A variational characterization, involving a max-inf of the Rayleigh quotient, is established for certain eigenvalues of a wide class of definitizable selfadjoint operators Q in a Krein space.
Binding, Paul, Najman, Branko
openaire   +2 more sources

Symmetries, variational principles, and quantum dynamics

open access: yesDiscrete Dynamics in Nature and Society, 2004
We describe the role of symmetries in formation of quantum dynamics. A quantum version of d'Alembert's principle is proposed to take into account the symmetry constrains more exact.
J. Manjavidze, A. Sissakian
doaj   +1 more source

Ingress of Li into Solid Electrolytes: Cracking and Sparsely Filled Cracks

open access: yesSmall Structures, 2023
The growth of Li dendrites in a solid electrolyte is commonly idealized by a pressure‐filled crack. Recent observations in both garnet and sulfide electrolytes show that sparsely filled cracks exist prior to shorting of the cell, thereby invalidating ...
Dipayan Mukherjee   +5 more
doaj   +1 more source

Nonlocal Variational Principles with Variable Growth

open access: yesJournal of Function Spaces, 2014
This paper is concerned with the functional J defined by J(u)=∫Ω×ΩW(x,y,∇u(x),∇u(y))dx dy, where Ω⊂ℝN is a regular open bounded set and W is a real-valued function with variable growth.
Yongqiang Fu, Miaomiao Yang
doaj   +1 more source

Variational principles and forecasting models of the contents of Ca and Sr during the A356 melting process

open access: yes工程科学学报, 2018
Ca and Sr are the most effective modification elements in the casting of the Al-Si alloy, and they are usually added before casting when the alloy is in the form of the middle alloy.
AO Xiao-hui   +4 more
doaj   +1 more source

On the structure of minimizers of causal variational principles in the non-compact and equivariant settings

open access: yes, 2012
We derive the Euler-Lagrange equations for minimizers of causal variational principles in the non-compact setting with constraints, possibly prescribing symmetries.
Finster, Felix, Bernard, Yann
core   +1 more source

Quantropy

open access: yesEntropy, 2015
There is a well-known analogy between statistical and quantum mechanics. In statistical mechanics, Boltzmann realized that the probability for a system in thermal equilibrium to occupy a given state is proportional to \(\exp(-E/kT)\), where \(E\) is the ...
John C. Baez, Blake S. Pollard
doaj   +1 more source

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