Results 31 to 40 of about 3,555,319 (320)
Open Mathematics, 2018 The paper belongs to the qualitative theory of half-linear equations which are located between linear and non-linear equations and, at the same time, between ordinary and partial differential equations.
Hasil Petr, Veselý Michal
doaj +1 more source
Realistic computable error bounds for three dimensional finite element analyses in linear elasticity [PDF]
, 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
Revisiting a Negative Cosmological Constant from Low-Redshift Data [PDF]
Symmetry, 2019 Persisting tensions between high-redshift and low-redshift cosmological observations suggest the dark energy sector of the Universe might be more complex than the positive cosmological constant of the Λ CDM model.
L. Visinelli, S. Vagnozzi, U. Danielsson
semanticscholar +1 more source
A sharp oscillation criterion for a difference equation with constant delay
Advances in Difference Equations, 2020 It is known that all solutions of the difference equation Δ x ( n ) + p ( n ) x ( n − k ) = 0 , n ≥ 0 , $$\Delta x(n)+p(n)x(n-k)=0, \quad n\geq0, $$ where { p ( n ) } n = 0 ∞ $\{p(n)\}_{n=0}^{\infty}$ is a nonnegative sequence of reals and k is a natural
Vasileios Benekas +2 more
doaj +1 more source
The 6dF Galaxy Survey: baryon acoustic oscillations and the local Hubble constant [PDF]
, 2011 We analyse the large-scale correlation function of the 6dF Galaxy Survey (6dFGS) and detect a baryon acoustic oscillation (BAO) signal at 105h −1 Mpc. The 6dFGS BAO detection allows us to constrain the distance–redshift relation at zeff = 0.106.
F. Beutler +9 more
semanticscholar +1 more source
Recombination-independent Determination of the Sound Horizon and the Hubble Constant from BAO [PDF]
Astrophysical Journal, 2020 The Hubble tension and attempts to resolve it by modifying the physics of (or at) recombination motivate finding ways to determine H0 and the sound horizon at the epoch of baryon decoupling rd in ways that rely neither on a recombination model nor on ...
L. Pogosian, Gong-Bo Zhao, K. Jedamzik
semanticscholar +1 more source
Frontiers 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
Nanomechanical characterization of quantum interference in a topological insulator nanowire [PDF]
, 2019 The discovery of two-dimensional gapless Dirac fermions in graphene and topological insulators (TI) has sparked extensive ongoing research toward applications of their unique electronic properties.
Doh, Yong-Joo +7 more
core +4 more sources
Covariant structure constants for a deformed oscillator algebra [PDF]
Theoretical 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
Harmonic oscillations and their switching in elliptical optical waveguide arrays
, 2011 We have studied harmonic oscillations in an elliptical optical waveguide array in which the coupling between neighboring waveguides is varied in accord with a Kac matrix so that the propagation constant eigenvalues can take equally spaced values.
Edelman A Kostlan E Lewis +7 more
core +1 more source