BACKGROUND The prognostic implications of P-wave dispersion in patients with a variety of cardiac disease conditions are increasingly being recognised. The relationship between P-wave dispersion and left ventricular function in sickle cell anaemia is unknown. OBJECTIVE This study was aimed at evaluating the relationship between P-wave dispersion and left ventricular function in adult Nigerian...

INTRODUCTION It was aimed to calculate QT intervals in patients with acromegaly and to reveal its correlation between QT intervals, and growth hormone and insulin like growth factor-1. MATERIAL AND METHODS Forty-one patients with acromegaly were enrolled into the study. Another 41 individuals with similar features, such as comorbid diseases, age and sex constituted the control group. The elec...

In this paper, a discrete one-parameter distribution called the semi-Poisson is introduced, which based on set of non-negative integers. It seen that captures over-dispersion and zero-inflation scenarios well. A few properties proposed distribution, such as moments, probability-generating function, index dispersion, recurrence relation for negative moments are presented. The applied to two real...

In this paper, a new structure of photonic crystal fibers (PCFs) with large negative dispersion is presented in order to compensate the positive at wavelength 1.55 μm. The proposed PCF has square lattice structure. basic cladding, it consists four rings, so that each ring number circular holes. final structure, two inner rings cladding are reshaped relative outer rings. first near core stellar ...

We demonstrate the negative refraction of microwaves in a metallic photonic crystal prism. The spectral response of the photonic crystal prism, which manifests both positive and negative refraction, is in complete agreement with band-structure calculations and numerical simulations. The validity of Snell's law with a negative refractive index is confirmed experimentally and theoretically. The n...

In this paper, we develop a novel soft-clipping discrete beta GARCH (ScDBGARCH) model that provides an available method to bounded time series with under-dispersion, equi-dispersion or over-dispersion. The new not only allows positive dependence, but also negative dependence. stochastic properties of the models are established, and these results are, in turn, used analysis asymptotic conditiona...

Propagation of optical pulse in nonlinear media with varying dispersion is both fundamental [1] and important applied problem [2–8] because the dispersion-managed (DM) system, which is a system with periodic dispersion variation along an optical fiber, is one of the most prospective candidate for ultrafast high-bit-rate optical communication lines. Lossless propagation of optical pulse in DM fi...

Mechanical topological insulators have enabled a myriad of unprecedented characteristics that are otherwise not conceivable in traditional periodic structures. While rich dynamics, new developments the domain mechanical systems hindered by their inherent inability to exhibit negative elastic or inertial couplings owing inevitable loss dynamical stability. The aim this paper is, therefore, remed...