Istituto per le Applicazioni del Calcolo
"Mauro Picone"
Articolo in rivista
Numerical results for an accelerated projected gradient method with sparsity constraints for neuroimaging |
The purpose of neuroimaging is to investigate the brain functionality through the localization of the regions where bioelectric current flows, starting from the measurements of the magnetic field produced in the outer space. Assuming that each component of the current density vector possesses the… | |
Transition to hydrodynamics in colliding fermion clouds |
We study the transition from the collisionless to the hydrodynamic regime in a two-component spin-polarized mixture of 40K atoms by exciting its dipolar oscillation modes inside harmonic traps. The time evolution of the mixture is described by the VlasovLandau equations and numerically solved with… | |
Asymptotic Properties of Sequential Streaming Leveraging Users' Cooperation |
We consider a communication system in which a given digital content has to be delivered sequentially at constant rate to a set of users who asynchronously request it according to a Poisson process. Users can retrieve data: 1) from one or more sources that statically store the entire content; and 2… | |
Relativistic gravity gradiometry |
In general relativity, relativistic gravity gradiometry involves the measurement of the relativistic tidal matrix, which is theoretically obtained from the projection of the Riemann curvature tensor onto the orthonormal tetrad frame of an observer. The observer's 4-velocity vector defines its local… | |
Hydrokinetic approach to large-scale cardiovascular blood flow |
||
Spinning test particles in Weyl spacetimes |
The motion of spinning test particles along circular orbits in static vacuum spacetimes belonging to the Weyl class is discussed. Spin alignment and coupling with background parameters in the case of superimposed Weyl fields, corresponding to a single Schwarzschild black hole and single Chazy-… | |
Numerical Analysis of oscillations in a nonconvex problem related to image selective smoothing |
We study some numerical properties of a nonconvex variational problem which arises as the continuous limit of a discrete optimization method designed for the smoothing of images with preservation of discontinuities. The functional that has to be minimized fails to attain a minimum value. Instead,… | |
Continuity properties of solutions to the p-Laplace system |
A sharp integrability condition on the right-hand side of the p-Laplace system for all its solutions to be continuous is exhibited. Their uniform continuity is also analyzed and estimates for their modulus of continuity are provided. The relevant estimates are shown to be optimal as the right-hand… | |
A flexible high-performance Lattice Boltzmann GPU code for the simulations of fluid flows in complex geometries |
||
Dynamics of Trapped Fermion Clouds |
