396 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR154 papers
- Paris-Est SupFR126 papers
- École nationale des ponts et chausséesFR92 papers
- CERMICSFR71 papers
- Institut national de recherche en sciences et technologies du numériqueFR64 papers
- Laboratoire d'Informatique Gaspard-MongeFR46 papers
- Laboratoire d’Analyse et de Mathématiques AppliquéesFR44 papers
- Université Paris-Est CréteilFR40 papers
- Université Paris-Est Marne-la-ValléeFR39 papers
- Laboratoire NavierFR33 papers
- Laboratoire Modélisation et Simulation Multi-EchelleFR29 papers
- Université Paris DiderotFR15 papers
22 papers · 1 filter
MRI investigation of granular interface rheology using a new cylinder shear apparatus
Pascal Moucheront, François Bertrand, Georg Koval +5
The rheology of granular materials near an interface is investigated through proton magnetic resonance imaging. A new cylinder shear apparatus has been inserted in the MRI device,…
Anisotropic nonlinear elasticity in a spherical bead pack: influence of the fabric anisotropy
Yacine Khidas, Xiaoping Jia
Stress-strain measurements and ultrasound propagation experiments in glass bead packs have been simultaneously conducted to characterize the stress-induced anisotropy under uniaxia…
On external presentations of infinite graphs
Christophe Morvan
The vertices of a finite state system are usually a subset of the natural numbers. Most algorithms relative to these systems only use this fact to select vertices. For infinite sta…
Regularization properties of the 2D homogeneous Boltzmann equation without cutoff
Vlad Bally, Nicolas Fournier
We consider the 2-dimensional spatially homogeneous Boltzmann equation for hard potentials. We assume that the initial condition is a probability measure that has some exponential…
Finite element computation of absorbing boundary conditions for time-harmonic wave problems
Denis Duhamel, Tien-Minh Nguyen
This paper proposes a new method, in the frequency domain, to define absorbing boundary conditions for general two-dimensional problems. The main feature of the method is that it c…
Permeability of a bubble assembly: From the very dry to the wet limit
Florence Rouyer, Olivier Pitois, Elise Lorenceau +1
We measure the permeability of a fluidized bed of monodispersed bubbles with soap solution characteristic of mobile and non-mobile interfaces. These experimental data extend the pe…
Three-dimensional jamming and flows of soft glassy materials
Guillaume Ovarlez, Quentin Barral, Philippe Coussot
Various disordered dense systems such as foams, gels, emulsions and colloidal suspensions, exhibit a jamming transition from a liquid state (they flow) to a solid state below a yie…
Conformally covariant quantization of Maxwell field in de Sitter space
S. Faci, E. Huguet, J. Queva +1
In this article, we quantize the Maxwell ("massless spin one") de Sitter field in a conformally invariant gauge. This quantization is invariant under the SO group and cons…
Annealed lower tails for the energy of a polymer
Amine Asselah
We consider the energy of a randomly charged polymer. We assume that only charges on the same site interact pairwise. We study the lower tails of the energy, when averaged over bot…
Nonlinear viscoelastic wave propagation: an extension of Nearly Constant Attenuation (NCQ) models
Nicolas Delépine, Luca Lenti, Guy Bonnet +1
Hysteretic damping is often modeled by means of linear viscoelastic approaches such as "nearly constant Attenuation (NCQ)" models. These models do not take into account nonlinear e…
Yield stress and shear-banding in granular suspensions
Abdoulaye Fall, Francois Bertrand, Guillaume Ovarlez +1
We study the emergence of a yield stress in dense suspensions of non-Brownian particles, by combining local velocity and concentration measurements using Magnetic Resonance Imaging…
An energy-preserving Discrete Element Method for elastodynamics
Laurent Monasse, Christian Mariotti
We develop a Discrete Element Method (DEM) for elastodynamics using polyhedral elements. We show that for a given choice of forces and torques, we recover the equations of linear e…
Effective dynamics using conditional expectations
Frederic Legoll, Tony Lelievre
The question of coarse-graining is ubiquitous in molecular dynamics. In this article, we are interested in deriving effective properties for the dynamics of a coarse-grained variab…
Viable harvest of monotone bioeconomic models
Michel De Lara, Pedro Gajardo, Hector Ramirez Cabrera
Some monospecies age class models, as well as specific multi-species models (with so-called technical interactions), exhibit useful monotonicity properties. This paper deals with d…
The many-body Green function of degenerate systems
Christian Brouder, Gianluca Panati, Gabriel Stoltz
A rigorous non perturbative adiabatic approximation of the evolution operator in the many-body physics of degenerate systems is derived. This approximation is used to solve the lon…
Gell-Mann and Low formula for degenerate unperturbed states
Christian Brouder, Gianluca Panati, Gabriel Stoltz
The Gell-Mann and Low switching allows to transform eigenstates of an unperturbed Hamiltonian into eigenstates of the modified Hamiltonian . This switching can be pe…
Homogenization of accelerated Frenkel-Kontorova models with types of particles
Nicolas Forcadel, Cyril Imbert, Régis Monneau
We consider systems of ODEs that describe the dynamics of particles. Each particle satisfies a Newton law (including the acceleration term) where the force is created by the intera…
Constant entropy sampling and release waves of shock compressions
Jean-Bernard Maillet, Emeric Bourasseau, Laurent Soulard +2
We present several equilibrium methods that allow to compute isentropic processes, either during the compression or the release of the material. These methods are applied to comput…
The Dielectric Permittivity of Crystals in the reduced Hartree-Fock approximation
Eric Cancès, Mathieu Lewin
In a recent article (Cancès, Deleurence and Lewin, Commun. Math. Phys., 281 (2008), pp. 129-177), we have rigorously derived, by means of bulk limit arguments, a new variational mo…
Existence, uniqueness and convergence of a particle approximation for the Adaptive Biasing Force process
Benjamin Jourdain, Tony Lelievre, Raphaël Roux
We prove existence and uniqueness for some nonlinear stochastic differential equation used in molecular dynamics, whose nonlinearity comes from a conditional expectation term. We a…
Quantitative estimates of the convergence of the empirical covariance matrix in Log-concave Ensembles
Radosław Adamczak, Alexander E. Litvak, Alain Pajor +1
Let be an isotropic convex body in . Given $\eps>0$, how many independent points uniformly distributed on are needed for the empirical covariance matrix to appr…
Probing viscoelastic properties of a thin polymer film sheared between a beads layer and quartz crystal resonator
Julien Leopoldes, Xiaoping Jia
We report measurements of viscoelastic properties of thin polymer films of 10-100 nm at the MHz range. These thin films are confined between a quartz crystal resonator and a millim…