Results 31 to 40 of about 439,956 (300)

Linear and Non Linear Effects on the Newtonian Gravitational Constant as deduced from the Torsion Balance [PDF]

open access: yes, 2007
The Newtonian gravitational constant has still 150 parts per million of uncertainty. This paper examines the linear and nonlinear equations governing the rotational dynamics of the torsion gravitational balance.
Enns R. H.   +6 more
core   +2 more sources

Critical Oscillation Constant for Difference Equations with Almost Periodic Coefficients

open access: yesAbstract and Applied Analysis, 2012
We investigate a type of the Sturm-Liouville difference equations with almost periodic coefficients. We prove that there exists a constant, which is the borderline between the oscillation and the nonoscillation of these equations.
Petr Hasil, Michal Veselý
doaj   +1 more source

Experimental Study on the Dynamic Heat Transfer Characteristics of a Mechanically Pumped Two-phase Cooling Loop

open access: yesFrontiers in Energy Research, 2021
The present research designs a mechanically pumped cooling loop system and conducts an experimental investigation on the dynamic heat transfer characteristics of the system.
Lei Li, Jianyun Tao, Wei Gao
doaj   +1 more source

Covariant structure constants for a deformed oscillator algebra [PDF]

open access: yesTheoretical and Mathematical Physics, 2017
$sl_2$-covariant expressions for structure constants of the associative algebra of deformed oscillators $Aq\left(2, \right)$ are obtained.
openaire   +2 more sources

Realistic computable error bounds for three dimensional finite element analyses in linear elasticity [PDF]

open access: yes, 2011
We obtain a computable estimator for the energy norm of the error in piecewise affine and piecewise quadratic finite element approximations of linear elasticity in three dimensions.
Ainsworth, Mark   +1 more
core   +1 more source

The Oscillation of a Class of the Fractional-Order Delay Differential Equations

open access: yesDiscrete Dynamics in Nature and Society, 2014
Several oscillation results are proposed including necessary and sufficient conditions for the oscillation of fractional-order delay differential equations with constant coefficients, the sufficient or necessary and sufficient conditions for the ...
Qianli Lu, Feng Cen
doaj   +1 more source

Bloch Oscillations Due to Quantum Domain Breathing in One-Dimensional Electronic Photoinduced Phase Transitions

open access: yesApplied Sciences, 2019
We theoretically predict a novel oscillation that will be observed during the dynamical processes of one-dimensional electronic photoinduced phase transitions.
Kaoru Iwano
doaj   +1 more source

Relation between dispersion lines and conductance of telescoped armchair double-wall nanotubes analyzed using perturbation formulas and first-principles calculations

open access: yes, 2012
The Landauer's formula conductance of the telescoped armchair nanotubes is calculated with the Hamiltonian defined by first-principles calculations (SIESTA code). Herein, partially extracting the inner tube from the outer tube is called 'telescoping'. It
R. Saito, Ryo Tamura, S. Datta
core   +1 more source

Necessary and Sufficient Conditions of Oscillation in First Order Neutral Delay Differential Equations

open access: yesAbstract and Applied Analysis, 2014
We are concerned with oscillation of the first order neutral delay differential equation [x(t)−px(t−τ)]′+qx(t−σ)=0 with constant coefficients, and we obtain some necessary and sufficient conditions of oscillation for all the solutions in respective cases
Songbai Guo, Youjian Shen, Binbin Shi
doaj   +1 more source

A Survey on the Oscillation of Difference Equations with Constant Delays

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2019
In this survey, necessary and sufficient conditions for the oscillation of all solutions of delay difference equations with one or several constant arguments, in terms of the characteristic equation, are presented.
Ioannis Stavroulakis
doaj   +1 more source

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