Results 31 to 40 of about 1,382,098 (332)

Effective action and density functional theory [PDF]

open access: yes, 2002
The effective action for the charge density and the photon field is proposed as a generalization of the density functional. A simple definition is given for the density functional, as the functional Legendre transform of the generator functional of ...
.R.G. Parr   +41 more
core   +3 more sources

Density-functional fluctuation theory of crowds

open access: yesNature Communications, 2018
Tools from statistical physics can be used to investigate a large variety of fields ranging from economics to biology. Here the authors first adapt density-functional theory to predict the distributions of crowds in new environments and then validate ...
J. Felipe Méndez-Valderrama   +4 more
doaj   +1 more source

Density Functional Theory Insight into Chemical Vapor Infiltration

open access: yesMethane, 2023
Chemical Vapor Infiltration (CVI) has proven remarkably successful in producing strong and lightweight ceramic matrix composite materials. This technology has matured to regular industrial use.
Eric A. Walker   +2 more
doaj   +1 more source

Scaled Density Functional Theory Correlation Functionals [PDF]

open access: yesThe Journal of Physical Chemistry A, 2007
We show that a simple one-parameter scaling of the dynamical correlation energy estimated by the density functional theory (DFT) correlation functionals helps increase the overall accuracy for several local and nonlocal functionals. The approach taken here has been described as the "scaled dynamical correlation" (SDC) method [Ramachandran, J.
Mohammed M, Ghouri   +2 more
openaire   +2 more sources

Investigation of structure and vibrational properties of cyclobutane pirimidine dimer [PDF]

open access: yesHemijska Industrija, 2013
We performed a theoretical analysis of the structure and vibrational properties of cyclobutane pyrimidine dimer, which is the main product in a photochemical reaction involving two molecules of 1-methylthymine.
Petković Milena M.   +2 more
doaj   +1 more source

Density-functional theory of polar insulators [PDF]

open access: yes, 1996
We examine the density-functional theory of macroscopic insulators, obtained in the large-cluster limit or under periodic boundary conditions. For polar crystals, we find that the two procedures are not equivalent.
C. O. Almbladh   +19 more
core   +3 more sources

Nuclear fission in covariant density functional theory

open access: yesEPJ Web of Conferences, 2013
The current status of the application of covariant density functional theory to microscopic description of nuclear fission with main emphasis on superheavy nuclei (SHN) is reviewed.
Afanasjev A.V., Abusara H., Ring P.
doaj   +1 more source

Density functional theory of electrowetting

open access: yes, 2014
The phenomenon of electrowetting, i.e., the dependence of the macroscopic contact angle of a fluid on the electrostatic potential of the substrate, is analyzed in terms of the density functional theory of wetting.
Bier, Markus, Ibagon, Ingrid
core   +1 more source

Recent Progress in Lattice Density Functional Theory

open access: yesComputation, 2019
Recent developments in the density-functional theory of electron correlations in many-body lattice models are reviewed. The theoretical framework of lattice density-functional theory (LDFT) is briefly recalled, giving emphasis to its universality and to ...
T. S. Müller, W. Töws, G. M. Pastor
doaj   +1 more source

A density functional theory for ecology across scales

open access: yesNature Communications, 2023
Modelling diverse ecological phenomena across scales with a single mathematical framework is challenging. Here, the authors draw on density functional theory to develop a framework that bridges between mechanistic theories at fine scales and statistical ...
Martin-I. Trappe, Ryan A. Chisholm
doaj   +1 more source

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