بحث بسيط
السجلات المعروضة 31 -- 40 من 284
Fate of accidental symmetries of the relativistic hydrogen atom in a spherical cavity
(
Elsevier Masson
, 2015 , Article)
The non-relativistic hydrogen atom enjoys an accidental SO(4) symmetry, that enlarges the rotational SO(3) symmetry, by extending the angular momentum algebra with the Runge–Lenz vector. In the relativistic hydrogen atom ...
On computing joint invariants of vector fields
(
Elsevier
, 2015 , Article)
A constructive version of the Frobenius integrability theorem-that can be programmed effectively-is given. This is used in computing invariants of groups of low ranks and recover examples from a recent paper of Boyko etal. (2009).
PbS/CdS heterojunction quantum dot solar cells
(
Springer New York LLC
, 2016 , Article)
The present work investigates the effects of combination of lead sulfide PbS quantum dots and cadmium sulfide CdS nanoparticles (NPs), with n-type and p-type semiconductors, on the photovoltaic performance of heterojunction ...
PPF-dependent fixed point results for multi-valued ? F-contractions in Banach Spaces and Applications
(
MDPI AG
, 2019 , Article)
The solutions for many real life problems is obtained by interpreting the given problem mathematically in the form of f (x) = x. One of such examples is that of the famous Borsuk-Ulam theorem, in which using some fixed ...
Fixed point results for generalized chatterjea type contractive conditions in partially ordered G-metric spaces
(
Hindawi Publishing Corporation
, 2014 , Article)
In the framework of ordered G -metric spaces, fixed points of maps that satisfy the generalized Chatterjea type contractive conditions are obtained. The results presented in the paper generalize and extend several well ...
Investigation of Proton Diffusion Coefficient for PbO2 Prepared from Intermediate Oxides
(
Pleiades Publishing
, 2019 , Article)
Lead dioxide was extracted from used batteries, and used to synthesize the following intermediate oxides by heating at different temperatures: Pb12O19, Pb12O17, and Pb3O4. Each of the prepared intermediate oxide was subject ...
Positron annihilation study on polyaniline nanocomposite used for Pb(II) ion removal
(
Taylor & Francis
, 2016 , Article)
Nanocomposites of polyaniline (PANI) with three different concentrations of micrometre-sized sawdust are prepared in aqueous media via chemical casting method at room temperature. Thereafter, the removal efficiency of the ...
Approximate analytic solutions of transient nonlinear heat conduction with temperature-dependent thermal diffusivity
(
Hindawi Publishing Corporation
, 2014 , Article)
A new approach for generating approximate analytic solutions of transient nonlinear heat conduction problems is presented. It is based on an effective combination of Lie symmetry method, homotopy perturbation method, finite ...
Effective action study of the PT-symmetric (iϕ3)6−ϵ theory and the Yang–Lee edge singularity
(
World Scientific Publishing Co. Pte Ltd
, 2019 , Article)
We use the effective potential method to study the PT-symmetric iϕ3 field theory in 6−ϵ space–time dimensions. For ϵ=0, we obtained the first two energy levels which are real as well as reflecting the stability of the ...
Existence and approximation results for SKC mappings in CAT(0) spaces
(
Springer International Publishing
, 2014 , Article)
Recently, Karap?nar and Tas (Comput. Math. Appl. 61:3370-3380, 2011) extended the class of Suzuki-generalized nonexpansive mappings to the class of SKC mappings. In this paper, we investigate SKC mappings to get a criterion ...