Istituto per le Applicazioni del Calcolo
"Mauro Picone"
Istituto per le Applicazioni del Calcolo
"Mauro Picone"
LBcuda: A high-performance CUDA port of LBsoft for simulation of colloidal systems |
We present LBcuda, a GPU accelerated version of LBsoft, our open-source MPI-based software for the simulation of multi-component colloidal flows. We describe the design principles, the optimization and the resulting performance as compared to the CPU version, using both an average cost GPU and high… | |
Semiflexible polymers under external fields confined to two dimensions |
The non-equilibrium structural and dynamical properties of semiflexible polymers confined to two dimensions are investigated by molecular dynamics simulations. Three different scenarios are considered: the force-extension relation of tethered polymers, the relaxation of an initially stretched… | |
Minimal kinetic theory: A mathematical framework for non-equilibrium flowing matter |
We discuss the intriguing ability of minimal kinetic theory to describe a broad variety of complex non-equilibrium flows across scales of motion. It is argued that, besides major computational progress, minimal kinetic theory also provides a new conceptual framework to investigate the complexities… | |
On the equilibrium of a charged massive particle in the field of a Reissner-Nordstrom black hole |
The multiyear problem of a two-body system consisting of a ReissnerNordström black hole and a charged massive particle at rest is here solved by an exact perturbative solution of the full EinsteinMaxwell system of equations. The expressions of the metric and of the electromagnetic field,… | |
An anisotropic eigenvalue problem of Stekloff type and weighted Wulff inequalities |
We study the Stekloff eigenvalue problem for the so-called pseudo p-Laplacian operator. After proving the existence of an unbounded sequence of eigenvalues, we focus on the first nontrivial eigenvalue ?, providing various equivalent characterizations for it. We also prove an upper bound for ? in… | |
The stability and the convergence of a collocation method for a class of Cauchy singular integral equations |
The author proves the stability and the uniform convergence of a collocation method for solving Cauchy singular integral equations with regular pertubation kernel. Error estimates in the uniform norm are also given. | |
General velocity, pressure, and initial condition for two-dimensional and three-dimensional lattice Boltzmann simulations |
In this paper, an alternative approach to implement initial and boundary conditions in the lattice Boltzmann method is presented. The main idea is to approximate the nonequilibrium component of distribution functions as a third-order power series in the lattice velocities and formulate a procedure… | |
Application of the HLSVD Technique to the Filtering of X-Ray Diffraction Data |
A filter based on the Hankel-Lanczos singular value decomposition (HLSVD) technique is presented and applied for the first time to X-ray diffraction (XRD) data. Synthetic and real powder XRD intensity profiles of nanocrystals are used to study the filter performances with different noise levels.… | |
Spontaneous motility of passive emulsion droplets in polar active gels |
We study by computer simulations the dynamics of a droplet of passive, isotropic fluid, embedded in a polar active gel. The latter represents a fluid of active force dipoles, which exert either contractile or extensile stresses on their surroundings, modelling for instance a suspension of… | |
Wavelet density estimation for weighted data |
We consider the estimation of a density function on the basis of a random sample from a weighted distribution. We propose linear and nonlinear wavelet density estimators, and provide their asymptotic formulae for mean integrated squared error. In particular, we derive an analogue of the asymptotic… |