Results 101 to 110 of about 458,840 (351)
Arthritis Care &Research, EarlyView.Objective To investigate the association between rheumatoid arthritis (RA) and coronary artery calcium (CAC) prevalence, incidence, and progression over four years in adults without prior cardiovascular disease. Methods A case‐cohort study within the Brazilian Longitudinal Study of Adult Health (ELSA‐Brasil) included 585 participants (86 patients with ...
Patrícia Fonseca Estrada +7 more
wiley +1 more source
Stability of periodic plane wave solutions of wave equations
Journal of Computational and Applied Mathematics, 1991 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
A global investigation of solitary-wave solutions to a two-parameter model for water waves
, 1996 The model equation (2r''''/15)-(br'')+(ar)+(3r^2/2)-((r')^2/2)+[rr']'=0 arises as the equation for solitary-wave solutions to a fifth-order long-wave equation for gravitycapillary water waves.
Groves, MD, Champneys, AR
core
QUASI-PERIODIC SOLUTIONS FOR 1D NONLINEAR WAVE EQUATION
Journal of Applied Analysis & Computation, 2023 Summary: In this paper, one-dimensional (1D) nonlinear wave equation \[ u_{tt}-u_{xx}+mu+u^7=0 \] on the finite \(x\)-interval \([0, \pi]\) with Dirichlet boundary conditions is considered. It is proved that there are many \(3\)-dimensional elliptic invariant tori, and thus quasi-periodic solutions for the above equation.
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley +1 more source
Periodic and solitary-wave solutions of the Degasperis-Procesi equation
, 2004 Travelling-wave solutions of the Degasperis-Procesi equation are investigated. The solutions are characterized by two parameters. For propagation in the positive x-direction, hump-like, inverted loop-like and coshoidal periodic-wave solutions are found ...
Vakhnenko, V.O., Parkes, E.J.
core +1 more source
EXACT PERIODIC WAVE SOLUTIONS OF A SINGULAR INTEGRABLE EQUATION
Mathematical Modelling and Analysis, 2011 In this paper, theory of dynamical systems is employed to investigate periodic waves of a singular integrable equation. These periodic waves contain smooth periodic waves, periodic cusp waves and periodic cusp loop waves. Under fixed parameter conditions, their exact parametric expressions are given.
Xie, Shaolong, Gao, Bin
openaire +3 more sources
Karl Popper and the Mechanisms of Hydrogen Embrittlement
Advanced Engineering Materials, EarlyView.Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley +1 more source
, 2015 We overview theoretical and experimental advances in the field of rogue wave solutions of multi-component optical wave systems. In these systems, the transfer of energy among the coupled waves may lead to novel and complex extreme wave phenomena.
Conforti, M. +20 more
core