1Neurologist of Nathan Portella Tropical Diseases Institute, Federal University of Piauí, Teresina PI, Brazil; 2Nathan Portella Tropical Diseases Institute, Federal University of Piauí, Teresina PI, Brazil; 3Faculdade NOVAFAPI, Teresina PI, Brazil. Correspondence: Marcelo Adriano da Cunha e Silva Vieira; Rua São Pedro 2.133; 64001-380 Teresina PI Brasil; E-mail: [email protected] Confli...

In this paper, four approximate cone-beam CT reconstruction algorithms are compared: Advanced single slice rebinning (ASSR) as a representative of algorithms employing a two dimensional approximation, PI, PI-SLANT, and 3-PI which all use a proper three dimensional back-projection. A detailed analysis of the image artifacts produced by these techniques shows that aliasing in the z-direction is t...

Three experiments examined behavior in extinction following periodic reinforcement. During the first phase of Experiment 1, four groups of pigeons were exposed to fixed interval (FI 16 s or FI 48 s) or variable interval (VI 16 s or VI 48 s) reinforcement schedules. Next, during the second phase, each session started with reinforcement trials and ended with an extinction segment. Experiment 2 wa...

The paper is focused on computation of all possible robustly stabilizing Proportional-IntegralDerivative (PID) controllers for oblique wing aircraft modelled as interval system. The main idea of the proposed method is based on Tan’s technique for calculation of (nominally) stabilizing PI and PID controllers or robustly stabilizing PI controllers by means of plotting the stability boundary locus...

OBJECTIVES Raltegravir has been demonstrated to have a favourable impact on several metabolic parameters, including a lack of changes in lipid and glucose concentrations. We aimed to assess the effect on endothelial function of switching from a ritonavir-boosted protease inhibitor (PI/r)-based regimen to raltegravir. METHODS This is a substudy of the SPIRAL study, a multicentre, randomized, o...

• New data on the use and maintenance of space in Area Pi at Malia, Crete. Micromorphological analysis for Room 16, 19 Space 25, Pi. Correlation archaeological micromorphological Geoarchaeology uses sediments to define relation between human, soil environment by approaching, among other questions, different earthen structures. During excavation Crete, questions were raised concerning function a...

An accurate line list, called XABC, is computed for nitric oxide which covers its pure rotational, vibrational and rovibronic spectra. A mixture of empirical theoretical electronic transition dipole moments are used the final calculation $^{14}\mathrm{N}^{16}\mathrm{O}$ $\mathrm{A}\,^2\Sigma^+$ -- $\mathrm{X}\,^2\Pi$, $\mathrm{B}\,^2\Pi$ $\mathrm{X}^2\Pi$ $\mathrm{C}\,^2\Pi$ $\mathrm{X}\,^2\Pi$...

Since there is no hyperbolic Dehn filling theorem for higher dimensions, it challenging to construct explicit manifolds of small volume in dimension at least four. Here, we build up closed 4-manifolds <mm...

The two conjectures are, of course, equivalent. If 2n — 2 = pi+p2, then 2n = pi+p2+2 and 2n + l = pi+p2+3Conversely, if 2n=pi -\-p2-\-pz one of the primes must be 2 and 2n — 2 = pi+p2. An impressive collection of numerical evidence indicating the truth of the conjectures has accumulated in the years since Goldbach's letter was written, but is it not known to this day whether the conjectures are...