in this paper the reflection coefficient of electromagnetic wave incidence on the walls of the buildings and obstacles that occurs in mobile communication path was modified by solving the riccati nonlinear equations. for this purpose, the building walls are assumed inhomogeneous layers where their permittivity changes as function of the wall thickness. using this reflection coefficient, a new p...

In a recent article (Katsav and Heyman, 2020), we derived an approximate tip-diffraction coefficient for circular wide-angle cones. the present work, derive uniform solution field in geometrical optics (GO) transition zones. The has form of Weber parabolic cylinder function order −3/2, but far from zones, it reduces to separate reflection tip diffraction contributions. derivation utilizes spect...

Electromagnetic wave diffraction by a wide and thick slit has been formulated and analyzed the effect of the slit’s thickness. From our numerical calculation, it has been found that for far field pattern, one can apply a rather simple infinitely thin slit formulation, when the thickness of the wide slit is less than one half wavelength. keywords: Ray-mode coupling, Thick slit diffraction proble...

for Analyzing the Diffraction of an Electromagnetic Gaussian Beam by a Cylinder Using UTD Concepts Titipong Lertwiriyaprapa , Kittisak Phaebua , Chuwong Phongcharoenpanich 2 and Monai Krairiksh 2 1 Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkut’s University of Technology North Bangkok, Thailand email: [email protected] 2 Faculty of Engineer...

Audio transcriptions from Automatic Speech Recognition systems are a continuous stream of words that are difficult to read. Segmenting these transcriptions into thematically distinct stories and categorizing the stories by topics increases readability and comprehensibility. However, manually defined topic categories are rarely available, and the cost of annotating a large corpus with thousands ...

This study summarizes the overall solution and sub-systems developed by the Center for Robust Speech Systems (CRSS) at the University of Texas at Dallas to address the NIST LRE-2011 competition. CRSS-UTD employs five core sub-systems in the proposed language ID solution that include: (1) i-vector, (2) SVM-GSV, (3) PPRLM, (4) Articulatory Feature based, and (5) Prosody based. The first four repr...

What is the relationship between civil war and terrorism? Recent attempts to unpack the similarities between these types of political violence have either focused on creating actor-based categories (terrorists vs. insurgents) and elucidating the different reasons for being one or the other or comparing and contrasting each to discern whether they have similar etiologies. In contrast to previous...