This paper proposes some approaches to model Ultra Wideband (UWB) antenna arrays. Based on the array factor, often stipulated as not adapted for the description of the properties of UWB arrays in the literature, an analytical expression of the beampattern is developed. The achieved results are coherent with other formulations and empiric studies proposed in the literature. Furthermore, a time-f...

In order to make realistic simulations of the radio propagation mechanism in ultra-wide band channels, an appropriate model is usually needed. In this paper we give a new technique of modeling the impulse response of the 60 Ghz channel. This new approach is based on the spectral analysis of α-stable processes. Our new model present many advantages : firstly, the channel is characterized only by...

Motivated by the p-analogue of exponential integral function [1], we introduce a two-parameter generalization Incomplete Exponential Integral function. By using classical H¨older’s and Young’s inequalities, among other analytical techniques, establish some new inequalities involving generalized

We investigate gravitational effects of extreme, non-extreme and ultraextreme domain walls in the presence of a dilaton field φ. The dilaton is a scalar field without self-interaction that couples to the matter potential that is responsible for the formation of the wall. Motivated by superstring and supergravity theories, we consider both an exponential dilaton coupling (parametrized with the c...

Introduction Loss of glycosaminoglycans (GAG) is a signature of early osteoarthritis (OA). Although sodium MRI has been shown to correlate linearly with GAG concentration (1, 2), it poses major challenges at clinical magnetic field strengths (1.5T/3.0T) in terms of low signal-to-noise (SNR), poor spatial resolution and long acquisition times due to low natural abundance, low sodium concentratio...

The dynamics of GRB jets during the afterglow phase have an important effect on the interpretation of their observations and for inferring key physical parameters such as their true energy and event rate. Semi-analytic models generally predict a fast lateral expansion, where the jet opening angle asymptotically grows exponentially with its radius. Numerical simulations, however, show a much mor...

In this paper, we developed a metal micro-fluidic chip with advanced surface processing for ultra-small volume molecular isothermal amplification. This method takes advantages of the nucleic acid amplification with good stability and consistency, high sensitivity about 31 genomic DNA copies and bacteria specific gene identification. Based on the advanced surface processing, the bioreaction assa...

In this paper, by using the exponential convexity property of a barrier function, we propose an infeasible interior-point method for Cartesian P_*(k) horizontal linear complementarity problem over symmetric cones. The method uses Nesterov and Todd full steps, and we prove that the proposed algorithm is well define. The iteration bound coincides with the currently best iteration bound for the Ca...