Publications

Fluid mechanics

Analysis of aortic pressure fields from 4D flow MRI in healthy volunteers: Associations with age and left ventricular remodeling

Background: Aging-related arterial stiffness is associated with substantial changes in global and local arterial pressures. The subsequent early return of reflected pressure waves leads to an elevated left ventricular (LV) afterload and ultimately…

Kevin Bouaou, Ioannis Bargiotas, Thomas Dietenbeck, Emilie Bollache, Gilles Soulat, Damian Craiem, Sophia Houriez-Gombaud-Saintonge, Alain de Cesare, Umit Genser, Alain Giron, Alban Redheuil, Emmanuel Messas, Didier Lucor, Elie Mousseaux, Nadjia Kachenoura

Journal of Magnetic Resonance Imaging - 2019

Statistics

Categorized Bandits

We introduce a new stochastic multi-armed bandit setting where arms are grouped inside ``ordered'' categories. The motivating example comes from e-commerce, where a customer typically has a greater appetence for items of a specific well-identified…

Matthieu Jedor, Jonathan Louëdec, Vianney Perchet

Advances in Neural Information Processing Systems - 2019

Mathematics

Interpolating between Optimal Transport and MMD using Sinkhorn Divergences

Comparing probability distributions is a fundamental problem in data sciences. Simple norms and divergences such as the total variation and the relative entropy only compare densities in a point-wise manner and fail to capture the geometric nature…

Jean Feydy, Thibault Séjourné, François-Xavier Vialard, Shun-Ichi Amari, Alain Trouvé, Gabriel Peyré

AISTATS - 2019

Mathematics

Energy-optimal strokes for multi-link microswimmers: Purcell's loops and Taylor's waves reconciled

Abstract Micron-scale swimmers move in the realm of negligible inertia, dominated by viscous drag forces. In this paper, we formulate the leading-order dynamics of a slender multi-link ( N -link) microswimmer assuming small-amplitude undulations…

François Alouges, Antonio Desimone, Laetitia Giraldi, Yizhar Or, Oren Wiezel

New Journal of Physics - 2019

Bioengineering

Comparing Gait Trials with Greedy Template Matching

Aliénor Vienne-Jumeau, Laurent Oudre, Albane Moreau, Flavien Quijoux, Pierre-Paul Vidal, Damien Ricard

Sensors - 2019

Mathematics

Novel insight on molecular dynamics trajectories : local equilibrium viewed by kappa-segmentation

Molecular dynamics (MD) simulations can produce nowadays huge amount of data using high-throughput CPU/GPU clusters. However, the systematic and routine use of MD simulations for a study of the large molecules of real biological systems is still…

Sharad Goulam, Luba Tchertanov, Alain Trouvé

JOBIM 2019 - 2019

Methodology

Patch redundancy in images: a statistical testing framework and some applications

In this work we introduce a statistical framework in order to analyze the spatial redundancy in natural images. This notion of spatial redundancy must be defined locally and thus we give some examples of functions (auto-similarity and template…

Valentin de Bortoli, Agnès Desolneux, Bruno Galerne, Arthur Leclaire

SIAM Journal on Imaging Sciences - 2019

Image Processing

JPEG Grid Detection based on the Number of DCT Zeros and its Application to Automatic and Localized Forgery Detection

This work proposes a novel method for detecting JPEG compression, as well as its grid origin, based on counting the number of zeros in the DCT of 8 × 8 blocks. When applied locally, the same method can be used to detect grid alignment abnormalities…

Tina Nikoukhah, J Anger, T Ehret, Miguel Colom, J M Morel, R Grompone von Gioi

IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) Workshops - 2019

Engineering Sciences

Fiber to resonator coupling simulation measure and optimization

David Bassir, Patrice Salzenstein

Optoelectronic Devices and Integration - 2019

Life Sciences

Estimating Center of Mass Trajectory in Quiet Standing: a Review

As falls prevalence increases with the aging of the population, early detection of balance degradation is of great importance for efficient prevention and treatment. This work compares a wide range of state-of-the-art methods to estimate the…

Alice Nicolaï, Julien Audiffren

2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) - 2019