Mahdi Ebrahimian, Mohammadtaghi Rahmani and Maria I. Todorovska ABSTRACT Interferometric identification and health monitoring of high-rise buildings has been gaining increasing interest in recent years. The wave dispersion in the structure has been largely ignored in these efforts, but needs to be considered to further develop these methods. In this paper, (1) the goodness of estimation of vert...

in recent years, sub-band speech recognition has been found useful in addressing the need for robustness in speech recognition, especially for the speech contaminated by band-limited noise. in sub-band speech recognition, the full band speech is divided into several frequency sub-bands, with the result of the recognition task given by the combination of the sub-band feature vectors or their lik...

in this article, we suggested a novel design of polarization splitter based on coupler waveguide on inp substrate at 1.55mm wavelength. photonic crystal structure is consisted of two dimensional (2d) air holes embedded in inp/ingaasp material with an effective refractive index of 3.2634 which is arranged in a hexagonal lattice. the photonic band gap (pbg) of this structure is determined using t...

in this work we solve the set of hydrodynamical equations for accretion disks in the spherical coordinates (r,θ,ϕ) to obtain the explicit structure along θ direction. we study a two-dimensional advective accretion disc in the presence of thermal conduction. we find self-similar solutions for an axisymmetric, rotating, steady, viscous-resistive disk. we show that the global structure of an advec...

the electronic structure, energy band structure and electronic density of 2 sno ceramic in cubicphase have been investigated using first principle full potential-linearized augmented plane wave (fp-lapw)method within density functional theory (dft). local density approximation (lda) and the generalizedgradient approximation (gga), which are based on exchange- correlation energy optimization wer...

 The two-dimensional structure of graphene, consisting of an isotropic hexagonal lattice of carbon atoms, shows fascinating electronic properties, such as a gapless energy band and Dirac fermion behavior of electrons at fermi surface. Anisotropy can be induced in this structure by electrochemical pressure. In this article, by using tight-binding method, we review anisotropy effects in the elect...

The spiral structure of the low surface brightness galaxies F568-6 (Malin 2) and UGC 6614 is large scale, with arms that wrap more than half a revolution, and extend out to 50 and 80 kpc in UGC 6614 and F568-6 respectively. The density contrasts observed in the H I maps are high, with arm/interarm contrasts of ∼2:1, whereas the velocity perturbations due to spiral structure are low, in the rang...

A new multi-layer substrate integrated waveguide (SIW) structure is developed to design dual-band evanescent-mode band-pass filters (BPFs). Two independent series LC circuits are implemented by incorporating metallic irises in the different layers of the structure. The combination of the metallic irises with capacitive-plates is embedded inside the SIW to independently excite two evane...

We investigate experimentally the generation of highly directional radiation from a plain two-dimensional photonic crystal structure where an embedded source couples to a photonic crystal band having Bloch modes of even symmetry and negative group velocity. No modification is made to the crystal structure. By virtue of recent studies employing corrugated surface modes, this may be a viable meth...