The structure of amorphous GeSe2 (a-GeSe2) has been studied by means of a combination of two-edges X-ray absorption spectroscopy (XAS) and angle-dispersive X-ray diffraction under pressures up to about 30 GPa. Multiple-edge XAS data-analysis of a-GeSe2 at ambient conditions allowed us to reconstruct and compare the first-neighbor distribution function with previous results obtained by neutron d...

oxide nanoparticles can exhibit unique physical and chemical properties due to their limited size and a high density of corner or edge surface sites. in this study, mgo nanoparticle was synthesized using mg(ch3coo)2 and hexamethylenetetramine as starting materials. the structure and optical properties of these particles are investigated by using x-ray diffraction (xrd), scanning electron micros...

The Diffraction coefficient for electromagnetic waves incident obliquely incident on a curved edge formed by perfectly conducting plane surfaces. This diffraction coefficient remains valid in the transition region adjacent to shadow and reflection boundaries where the diffraction coefficients of Keller’s original theory fail. Our method is proposed on Keller’s method of the canonical problem, w...

The electromagnetic scattering from a large planar strip composed of parallel free-standing dense metallic strips is addressed. The scattered field is evaluated by resorting to a couple of different methods: an asymptotic technique, namely the Uniform Geometrical Theory of Diffraction (UTD), and a numerical method (the Method of Moments, MoM). The results of a numerical investigation are presen...

In recent years there has been growing interest in modeling sound propagation in complex, three-dimensional (3D) virtual environments. With diverse applications for the military, the gaming industry, psychoacoustics researchers, architectural acousticians, and others, advances in computing power and 3D audio-rendering techniques have driven research and development aimed at closing the gap betw...