Results 81 to 90 of about 3,552,226 (242)
Atrial fibrosis in atrial fibrillation: Mechanisms, mapping techniques and clinical applications
The Journal of Physiology, EarlyView.Abstract figure legend Summary of key aspects of atrial fibrosis in atrial fibrillation, highlighting atrial fibrosis as a hallmark of atrial fibrillation (AF). (1) Different types of fibrosis (blue), illustrating reparative and reactive fibrosis; (2) fibrosis detection techniques (green), illustrating late gadolinium enhancement cardiac magnetic ...
Caterina Vidal Horrach +8 more
wiley +1 more source
2-D fast sweeping method for the factored Eikonal equation and its improvement on inversion accuracy
Journal of Applied Geophysics, 2019 Curvature of wavefront is very large near source point. However, plane wavefront assumption is adopted when calculating traveltimes by use of finite-difference scheme.
Guangnan Huang +5 more
semanticscholar +1 more source
The Journal of Physiology, EarlyView.Abstract figure legend Activation time (AT) maps from right ventricular apical pacing in a human ventricles model with longer action potential duration in the His‐Purkinje system (HPS) than in the myocardium (MYO). For pacing with a long S1S2 coupling interval (CI), the AT from the myocardial pacing site to the first AT of the HPS (ATMYO) is longer ...
Jason D. Bayer +3 more
wiley +1 more source
On Lebesgue points of entropy solutions to the eikonal equation [PDF]
, 2023 We consider entropy solutions to the eikonal equation |?u| = 1 in two-space dimensions. These solutions are motivated by a class of variational problems and fail in general to have bounded variation.
Lamy X., Marconi E.
core +1 more source
Ultra‐Confinement of Polaritons in Single Atomic Layer Ag Photonic Quantum Dots
Advanced Materials, Volume 38, Issue 36, 26 June 2026.Strong confinement of surface phonon polaritons of silicon carbide was achieved in photonic quantum dots fabricated from van der Waals heterostructure of epitaxial graphene over single‐atomic layer silver. Scattering‐type scanning near‐field optical microscopy combined with an analytical approach, developed to reveal local propagation constants with ...
Xinyi Li +10 more
wiley +1 more source
Approximation of the 2D complex eikonal equation : analysis and simulation [PDF]
, 2012 textHigh frequency wave propagation is well described even at caustics by Gaussian beams and the complex eikonal equation. In contrast to the real eikonal equation, the complex eikonal equation is elliptic and not well posed as an initial value problem.
Liu, Peijia, Peijia Liu
core
Counterexamples in Calculus of Variations in $L^\infty$ through the vectorial Eikonal equation [PDF]
, 2018 We show that for any regular bounded domain $\Omega\subseteq \mathbb R^n$, there exist infinitely many global diffeomorphisms equal to the identity on $\partial \Omega$ which solve the Eikonal equation.
Nikos Katzourakis, Giles Shaw
semanticscholar +1 more source
Geodesic Vector Fields on a Riemannian Manifold
Mathematics, 2020 A unit geodesic vector field on a Riemannian manifold is a vector field whose integral curves are geodesics, or in other worlds have zero acceleration. A geodesic vector field on a Riemannian manifold is a smooth vector field with acceleration of each of
Sharief Deshmukh +2 more
doaj +1 more source
On the Eikonal equation for degenerate elliptic operators [PDF]
Proceedings of the American Mathematical Society, 2011 We consider the nonnegative viscosity solution of the homogeneous Dirichlet problem for an eikonal equation associated to an operator sum of squares of vector fields of Grushin type in a symmetric domain. We show that the solution is locally Lipschitz continuous except at the characteristic boundary point.
openaire +2 more sources
Advanced Science, Volume 13, Issue 32, 9 June 2026.Skeleton‐oriented object segmentation (SKOOTS) introduces a new strategy for 3D mitochondrial instance segmentation by predicting explicit skeletons rather than relying on boundary cues. This approach enables robust analysis of densely packed organelles in large FIB‐SEM datasets.
Christopher J. Buswinka +3 more
wiley +1 more source