Ricerc@Sapienza

A general numerical method for calculating the time-domain characteristics of the electromagnetic field generated by a pulsed dipole in the presence of a planar multilayered screen is presented. The method involves the efficient evaluation of classical Sommerfeld integrals and an inverse Fourier transform to recover the time-domain field from the frequency-domain field. For sufficiently thin screens with highly conductive properties, an analytical method, based on a modified Cagniard–de Hoop approach, is also presented to validate the results.

This study investigates the actual use of acceleration lanes by means of traffic micro-simulations in proximity to the convergence between the main and the secondary traffic streams. The data needed to develop the micro-simulation model were collected videotaping two acceleration lanes of an Italian highway, near the village of San Liberato. The relevant microsimulation model has been developed utilizing a commercial software, the TransModeler traffic simulation package, while the calibration and validation phases have been realized based on real-life data.

In this paper, we present a Boussinesq type model which is able to simulate wave fields and nearshore currents in coastal regions characterized by morphologically complex coastal lines and irregular seabed and by the presence of coastal structures. The proposed model solves the integral contravariant form of the fully nonlinear Boussinesq equations, from deep water up to just seaward of the surf zones, and the non-linear shallow water equations, in the surf zone, on curvilinear boundary conforming grids.