This paper presents two novel methods for Angle-of-Arrival (AoA) estimation in the presence of unknown mutual coupling. We mainly focus on the first method, where we show that this method could estimate AoAs of multiple sources when more mutual coupling parameters are included in the model, compared to existing methods. Furthermore, we derive a closed form Mean-Squared-Error (MSE) expression of...

Curvature induced phase transition is thoroughly investigated in a four-fermion theory with N components of fermions for arbitrary space-time dimensions (2 ≤ D < 4). We adopt the 1/N expansion method and calculate the effective potential for a composite operator ψ̄ψ. The resulting effective potential is expanded asymptotically in terms of the space-time curvature R by using the Riemann normal co...

The phase structure associated with the chiral symmetry is thoroughly investigated in de Sitter spacetime in the supersymmetric Nambu-Jona-Lasinio model with supersymmetry breaking terms. The argument is given in the three and four space-time dimensions in the leading order of the 1/N expansion and it is shown that the phase characteristics of the chiral symmetry is determined by the curvature ...

We report magnetization and specific-heat measurements on polycrystalline samples of BaCdVO PO4 2 and show that this compound is a S=1 /2 frustrated square lattice with ferromagnetic nearest-neighbor J1 and antiferromagnetic next-nearest-neighbor J2 interactions. The coupling constants J1 −3.6 K and J2 3.2 K are determined from a fitting of the susceptibility data and confirmed by an analysis o...

Introduction: One of the essential skills which helps healthcare management students succeed in leadership is development of critical thinking skills during their education. Our study objective was to assess critical thinking skills among healthcare management students of Shahid Sadoughi University of Medical Sciences in 2016. Methods: A descriptive, cross-sectional study was conducted among 9...

this study was carried out to investigate the possibility of prediction the occurrence of heat stress in dairy cows and determination of climate critical periods. the most common indexes for estimation the degree of thermal stress istemperature humidity index (thi). in this study yousef’s thi index (1985)was used to analyze the yearly and monthly effects of temperature and humidity. meteorologi...