Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Funaro, Daniele"'
Autor:
Fatone, Lorella, Funaro, Daniele
Anisotropic diffusion is a well recognized tool in digital image processing, including edge detection and denoising. We present here a particular nonlinear time-dependent operator together with an appropriate high-order discretization for the space v
Externí odkaz:
http://arxiv.org/abs/2204.13475
Autor:
Funaro, Daniele, Chiolerio, Alessandro
Biconical-type antennas featuring high directivity have been designed, created, and tested in anechoic chamber. Results in the range between 1 and 5 GHz are presented in this article. In particular, two different configurations have been tested, with
Externí odkaz:
http://arxiv.org/abs/2202.01887
Autor:
Funaro, Daniele
Vector displacements expressed in spherical coordinates are proposed. They correspond to electromagnetic fields in vacuum that globally rotate about an axis and display many circular patterns on the surface of a sphere. The fields basically satisfy t
Externí odkaz:
http://arxiv.org/abs/2106.05851
The accuracy and effectiveness of Hermite spectral methods for the numerical discretization of partial differential equations on unbounded domains, are strongly affected by the amplitude of the Gaussian weight function employed to describe the approx
Externí odkaz:
http://arxiv.org/abs/2104.02181
Autor:
Funaro, Daniele, Manzini, Gianmarco
Spectral approximation based on Hermite-Fourier expansion of the Vlasov-Poisson model for a collisionless plasma in the electro-static limit is provided, by including high-order artificial collision operators of Lenard-Bernstein type. These different
Externí odkaz:
http://arxiv.org/abs/2103.00691
Autor:
Funaro, Daniele
Fluid configurations in three-dimensions, displaying a plausible decay of regularity in a finite time, are suitably built and examined. Vortex rings are the primary ingredients in this study. The full Navier-Stokes system is converted into a 3D scala
Externí odkaz:
http://arxiv.org/abs/2004.04262
In this work, we apply a semi-Lagrangian spectral method for the Vlasov-Poisson system, previously designed for periodic Fourier discretizations, by implementing Legendre polynomials and Hermite functions in the approximation of the distribution func
Externí odkaz:
http://arxiv.org/abs/1807.02418
Autor:
Funaro, Daniele
Publikováno v:
Mathematica Modelling and Analysis, 23, 2018
If the interior of a conducting cavity (such as a capacitor or a coaxial cable) is supplied with a very high-frequency electric signal, the information between the walls propagates with an appreciable delay, due to the finiteness of the speed of ligh
Externí odkaz:
http://arxiv.org/abs/1807.06421
Autor:
Funaro, Daniele
Publikováno v:
Proceedings of VI International Conference on ATMOSPHERE, IONOSPHERE, SAFETY, Kaliningrad 2018, ISBN 978-5-9971-0491-7
Ball lightning is an impressive natural electromagnetic phenomenon occurring in atmosphere under suitable circumstances. Its origin, composition and stability issues are a matter of debate, due to presence of many evidences still unexplained. An atte
Externí odkaz:
http://arxiv.org/abs/1806.05555