The spectral theorem in linear algebra tells us that every symmetric matrix A (n x n) can be factored as A = PDP , where P is an orthogonal matrix and D is a diagonal matrix comprising of the eigenvalues of A. Such a diagonalization is possible only when A is symmetric. What if A is just a square matrix but not symmetric? We know that every square matrix A (symmetric or not) is diagonalizable a...

The current empirical study was conducted to investigate the wall neighborhood impact on the two-dimensional flow structure and heat transfer enhancement behind a square cylinder. The low- velocity open-circle wind tunnel was used to carry out the study tests considering the cylinder diameter (D)-based Reynolds number (ReD) of 5130. The selected items to compare were different gap he...

We report the first Vivaldi arrays monolithically fabricated exclusively using commercial, low-cost, 3-D metal printing (direct laser sintering [DMLS]). Furthermore, we developed one of dual-polarized on a triangular lattice, and compare it to square lattice array. The is attractive because has 15.5% larger cell size compared can be more naturally truncated into wide range aperture shapes such ...

In this paper, we consider the steady state mean square error (MSE) analysis for 2-D LMS adaptive filtering algorithm in which the filter’s weights are updated along both vertical and horizontal directions as a doubly-indexed dynamical system. The MSE analysis is conducted using the well-known independence assumption. First we show that computation of the weight-error covariance matrix for doub...

background: both vitamin d deficiency and hypertension are prevalent in the general population. several observations indicate an association between vitamin d deficiency and high blood pressure. the present case-control study aimed to compare serum 25-hydroxyvitamin d (25-ohd) in hypertensive patients versus healthy controls. methods: one hundred patients aged 30-60 years with hypertension (htn...