Results 71 to 80 of about 16,809 (204)
Anomalous Areas Detection in Rocks Using Time-Difference Adjoint Tomography
Mathematics, 2022 Detecting anomalous areas (such as caves, faults, and weathered layers) in rocks is essential for the safety of facilities and personnel in subsurface engineering.
Feiyue Wang +3 more
doaj +1 more source
Quantum gravitational optics: the induced phase
, 2007 The geometrical approximation of the extended Maxwell equation in curved spacetime incorporating interactions induced by the vacuum polarization effects is considered.
Ahmadi N +7 more
core +1 more source
The Journal of Physiology, EarlyView.Abstract figure legend This study examines the relationships between activation and repolarization times in epicardial reconstructed unipolar electrograms derived from ECG‐imaging in patients with normal and delayed ventricular activation. In patients with a narrow QRS‐complex, ECG‐imaging reveals significant variability in the activation ...
Karin C. Smits +9 more
wiley +1 more source
Fast Methods for Eikonal Equations: An Experimental Survey [PDF]
IEEE Access, 2019 The Fast Marching Method is a very popular algorithm to compute times-of-arrival maps (distances map measured in time units). Since their proposal in 1995, it has been applied to many different applications such as robotics, medical computer vision, fluid simulation, etc.
J. V. Gomez +3 more
openaire +4 more sources
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
A New Glauber Theory based on Multiple Scattering Theory
, 2008 Glauber theory for nucleus-nucleus scattering at high incident energies is reformulated so as to become applicable also for the scattering at intermediate energies. We test validity of the eikonal and adiabatic approximations used in the formulation, and
Kawai, Mitsuji +3 more
core +1 more source
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
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
Degenerate Eikonal equations with discontinuous refraction index [PDF]
ESAIM: Control, Optimisation and Calculus of Variations, 2006 Summary: We study the Dirichlet boundary value problem for eikonal type equations of ray light propagation in an inhomogeneous medium with discontinuous refraction index. We prove a comparison principle that allows us to obtain existence and uniqueness of a continuous viscosity solution when the Lie algebra generated by the coefficients satisfies a ...
openaire +2 more sources
Multiple Parton Interactions in Hadron Collisions and Diffraction
, 2009 Hadrons are composite objects made of quarks and gluons, and during a collision one can have several elementary interactions between the constituents. These elementary interactions, using an appropriate theoretical framework, can be related to the total ...
Lipari, Paolo, Lusignoli, Maurizio
core +1 more source