Results 21 to 30 of about 1,735 (69)

Revisiting the 1D and 2D laplace transforms [PDF]

open access: yes, 2020
Foundation for Science and Technology of Portugal, under the projects UIDB/00066/2020.The paper reviews the unilateral and bilateral, one- and two-dimensional Laplace transforms.
Machado, José Tenreiro   +1 more
core   +2 more sources

On classes of non-Gaussian asymptotic minimizers in entropic uncertainty principles

open access: yes, 2006
In this paper we revisit the Bialynicki-Birula & Mycielski uncertainty principle and its cases of equality. This Shannon entropic version of the well-known Heisenberg uncertainty principle can be used when dealing with variables that admit no variance ...
Abe   +47 more
core   +3 more sources

An Analytical Solution for Transient Heat Conduction in a Composite Slab with Time‐Dependent Heat Transfer Coefficient

open access: yesMathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018
An analytical solution is derived for one‐dimensional transient heat conduction in a composite slab consisting of n layers, whose heat transfer coefficient on an external boundary is an arbitrary function of time. The composite slab, which has thermal contact resistance at n − 1 interfaces, as well as an arbitrary initial temperature distribution and ...
Ryoichi Chiba, Filippo de Monte
wiley   +1 more source

Green's function method for handling radiative effects on false vacuum decay

open access: yes, 2015
We introduce a Green's function method for handling radiative effects on false vacuum decay. In addition to the usual thin-wall approximation, we achieve further simplification by treating the bubble wall in the planar limit.
Garbrecht, Bjorn, Millington, Peter
core   +1 more source

Field statistics in linear viscoelastic composites and polycrystals. [PDF]

open access: yes, 2014
International audienceThe aim of this study is to estimate the effective response, as well as the statistics of the fields (average and fluctuations per phase) in linear viscoelastic heterogeneous materials.
Badulescu, Claudiu   +2 more
core   +4 more sources

Forced Vibration of a Timoshenko Beam Subjected to Stationary and Moving Loads Using the Modal Analysis Method

open access: yesShock and Vibration, Volume 2017, Issue 1, 2017., 2017
The modal analysis method (MAM) is very useful for obtaining the dynamic responses of a structure in analytical closed forms. In order to use the MAM, accurate information is needed on the natural frequencies, mode shapes, and orthogonality of the mode shapes a priori.
Taehyun Kim   +3 more
wiley   +1 more source

Baryons as Solitons in Three Dimensional Quantum Chromodynamics

open access: yes, 1992
We show that baryons of three dimensional Quantum Chromodynamics can be understood as solitons of its effective lagrangian. In the parity preserving phase we study, these baryons are fermions for odd $N_c$ and bosons for even $N_c$, never anyons.
Ferretti, G., Rajeev, S. G., Yang, Z.
core   +2 more sources

d dimensional SO(d)-Higgs Models with Instanton and Sphaleron: d=2,3 [PDF]

open access: yes, 1999
The Abelian Higgs model and the Georgi-Glashow model in 2 and 3 Euclidean dimensions respectively, support both finite size instantons and sphalerons. The instantons are the familiar Nielsen-Oleson vortices and the 't Hooft-Polyakov monopole solutions ...
A.A. Belavin   +38 more
core   +2 more sources

Determination of the Creep Parameters of Linear Viscoelastic Materials

open access: yesJournal of Applied Mathematics, Volume 2016, Issue 1, 2016., 2016
Creep process of linear viscoelastic materials is described by the integral equation of Boltzmann‐Volterra in which creep kernel is approximated by Rabotnov’s fractional exponential function. The creep equation contains four unknown parameters: α, singularity parameter; β, fading parameter; λ, rheological parameter; and ε0, conditionally instantaneous ...
Alibay Iskakbayev   +3 more
wiley   +1 more source

Theoretical and practical differences between creep and relaxation Poisson's ratios in linear viscoelasticity [PDF]

open access: yes, 2015
International audiencePoisson's ratio is a well-defined parameter in elasticity. For time-dependent materials , multiple definitions based on the ratios between lateral and axial deformations are available. Here, we focus ourselves on the two most widely
Aili, Abudushalamu   +3 more
core   +3 more sources

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