A5061465937- Cardiac electrophysiology and arrhythmias
- Complex Systems and Time Series Analysis
- Advanced Thermodynamics and Statistical Mechanics
- Ionosphere and magnetosphere dynamics
- Magnetic confinement fusion research
- Solar and Space Plasma Dynamics
- Statistical Mechanics and Entropy
- Nonlinear Dynamics and Pattern Formation
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Quantum Mechanics and Applications
- Cardiac Arrhythmias and Treatments
- Atrial Fibrillation Management and Outcomes
- Theoretical and Computational Physics
- Neural dynamics and brain function
- Atomic and Molecular Physics
- Climate variability and models
- Astro and Planetary Science
- Meteorological Phenomena and Simulations
- Quantum Information and Cryptography
- Advanced Data Storage Technologies
- Complex Systems and Dynamics
- Fusion materials and technologies
- Force Microscopy Techniques and Applications
- Quantum Computing Algorithms and Architecture
Institut national de recherche en informatique et en automatique
2016-2024
Predict (France)
2024
Centre de Recherche Inria Bordeaux - Sud-Ouest
2016
Inserm
2014
Université de Bordeaux
2014
Electrophysiology and Heart Modeling Institute
2013-2014
Hôpital Cardiologique du Haut-Lévêque
2014
École Polytechnique
2006
Centre National de la Recherche Scientifique
2006
CEA Cadarache
2003-2005
Background— Specific noninvasive signal processing was applied to identify drivers in distinct categories of persistent atrial fibrillation (AF). Methods and Results— In 103 consecutive patients with AF, accurate biatrial geometry relative an array 252 body surface electrodes obtained from a noncontrast computed tomography scan. The reconstructed unipolar AF electrograms acquired at bedside multiple windows (duration, 9±1 s) were processed the (focal or reentrant activity) their cumulative...
Atrial fibrillation (AF) is a cardiac arrhythmia characterized by rapid and irregular atrial electrical activity with high clinical impact on stroke incidence. Best available therapeutic strategies combine pharmacological surgical means. But when successful, they do not always prevent long-term relapses. Initial success becomes all the more tricky to achieve as maintains itself pathology evolves into sustained or chronic AF. This raises open crucial issue of deciphering mechanisms that...
Two-dimensional fluid simulations of scrape-off layer (SOL) turbulence with non-constrained energy content (flux driven) are characterized by profile relaxation and strong outward bursts density. The ballistic propagation extends well beyond the e-folding length SOL a Mach number M⊥ ∼ 0.04. Turbulence stabilization is achieved biasing part limiter surface. critical radial extent to achieve this derived. This effect governs size biased ring required insulate wall from long range matter. same...
Observations of the interstellar medium (ISM) show a complex density and velocity structure which is in part attributed to turbulence. We here present self-contained introduction multifractal formalism microcanonical version allows us for first time compute precise turbulence characteristic parameters from single observational map without need averages grand ensemble statistical observables. focus on studying 250 mu-m Herschel Musca filament make use MHD simulations. find clear signature...
Under the conditions of weak Langmuir turbulence, a self-consistent wave-particle Hamiltonian models effective nonlinear interaction spectrum M waves with N resonant out-of-equilibrium tail electrons. In order to address its intrinsically time-asymptotic behavior, Monte Carlo code was built estimate equilibrium statistical mechanics in both canonical and microcanonical ensembles. First, single wave model is considered cold beam-plasma instability O’Neil setting for Landau damping. O’Neil’s...
As astounding as it may still seem to many, Bell's theorems do not prove nonlocality. Non separable multipartite objects exist classically, meaning with local physics, the statistical state measurement of which violates famous inequalities. Alleviating almost century old confusion, correct laws statistics and logic pinpoint true oddity quantum objects: duality. is shown in first part this short essay, duality plus conservation allow violation inequalities for any spatio-temporal separation....
We present significant improvements to our previous work on noise reduction in {\sl Herschel} observation maps by defining sparse filtering tools capable of handling, a unified formalism, significantly improved as well deconvolution order reduce effects introduced the limited instrumental response (beam). implement greater flexibility allowing wider choice parsimonious priors noise-reduction process. More precisely, we introduce and approach type $l^2$-$l^p$, with $p > 0$ variable apply it...
In a companion paper (I. Multifractal analysis of clinical data), we used wavelet-based multiscale to reveal and quantify the multifractal intermittent nature cardiac impulse energy in low frequency range ≲ 2Hz during atrial fibrillation (AF). It demarcated two distinct areas within coronary sinus (CS) with regionally stable spectra likely corresponding different anatomical substrates. The electrical activity also showed no sign kind temporal correlations typical cascading processes across...
We report unexpected evidence of critical fluctuations the electric potential heart during atrial fibrillation in humans. Scale invariance and long range correlations are found, which we show cannot be accounted for solely with property excitability, since disorder emerges by formation chaotic patterns excitable media. To shed light on data, discuss hypothesis that, fact, appears through a phase transition, compare phenomenological grounds to quenched-in magnetic transition. infer...
The paper assesses stationary probability distributions in out of equilibrium systems. In the phenomenology proposed, no free energy can be well defined. Fluctuations Landau couplings arise when intrinsic chemical potential leads to disorder. relaxation is shown take form a geometrical random process. Systems this kind show criticality features as that first order transitions, which encapsulate generalized static fluctuation dissipation relation. This will help determine three classes...