48 citations · 263 across the 66 of their papers we have counts for
6 papers · 1 filter
A cluster of many small holes with negative imaginary surface impedances may generate a negative refraction index
Ahmed Alsaedi, Bashir Ahmed, Durga Prasad Challa +2
We deal with the scattering of an acoustic medium modeled by an index of refraction varying in a bounded region of and equal to unity outside . This regio…
Self-adjoint elliptic operators with boundary conditions on not closed hypersurfaces
A. Mantile, A. Posilicano, M. Sini
The abstract theory of self-adjoint extensions of symmetric operators is used to construct self-adjoint realizations of a second-order elliptic operator on with li…
Extraction of the index of refraction by embedding multiple and close small inclusions
Ahmed Alsaedi, Faris Alzahrani, Durga Prasad Challa +2
We deal with the problem of reconstructing material coefficients from the farfields they generate. By embedding small (single) inclusions to these media, located at points in t…
The equivalent medium for the elastic scattering by many small rigid bodies and applications
Fadhel Al-Musallam, Durga Prasad Challa, Mourad Sini
We deal with the elastic scattering by a large number of rigid bodies, , of arbitrary shapes with and with constant Lamé coefficients…
Multiscale analysis of the acoustic scattering by many scatterers of impedance type
Durga Prasad Challa, Mourad Sini
We are concerned with the acoustic scattering problem, at a frequency , by many small obstacles of arbitrary shapes with impedance boundary condition. These scatterers are assum…
The enclosure method for the anisotropic Maxwell system
Rulin Kuan, Yi-Hsuan Lin, Mourad Sini
We develop an enclosure-type reconstruction scheme to identify penetrable and impenetrable obstacles in electromagnetic field with anisotropic medium in \mathbb{R}^{3}. The main di…