Flavonoids are a group of polyphenols with important bioactivity capacities and there is a growing interest on the role of these compounds in tolerance to environmental factors. In this work, we show that 7 of the 13 flavonoids studied have an ability to reduce cytochrome c (Cyt c) similar or higher than ascorbate: the flavonols […]

The method of fundamental solutions (MFS) is a meshfree numerical method for the approximate solution of homogeneous boundary value problems, where the unknown solution is approximated in terms of a linear combination of fundamental solutions of  the underlying differential operator, with singularities located in the exterior of the domain. In this work we extend the […]

The growth of the higher education population and different school paths to access an academic degree has increased the heterogeneity of students inside the classroom. Consequently, the effectiveness of traditional teaching methods has reduced. This paper describes the design, development, implementation and evaluation of a tutoring system (TS) to improve student’s engagement in higher mathematics. […]

“Silent Television – s_TV” is a solution that allows the users of a certain place to hear the sound of a TV, even if they are in a noisy environment. The solution comprises two modules: the transmitter and the receiver. The transmitter module is composed by equipment to capture and transmit sound from the TV […]

Direct Digital Manufacturing applied to the production of glass pieces represents undoubtedly a paradigm shift in the production method. Its application in the artistic glass industry has, as a result, a drastic reduction of the manual labor required, time production and mainly energy bills. As a consequence of the automation production processes, a mass production […]

The therapeutic effect of three polyvinyl alcohol (PVA) membranes loaded with electrically conductive materials – carbon nanotubes (PVA-CNTs) and polypyrrole (PVA-PPy) – were tested in vivo for neuro-muscular regeneration after an axonotmesis injury in the rat sciatic nerve. At week-12, a better recovery to normal gait pattern of the PVA-CNTs and PVA-PPy treated groups was […]

Pitch Estimation, also known as Fundamental Frequency (F0) estimation, has been a popular research topic for many years, and is still investigated nowadays. This paper presents a novel approach to the problem of Pitch Estimation, using Cartesian Genetic Programming (CGP). We take advantage of evolutionary algorithms, in particular CGP, to evolve mathematical functions that act […]

Considering that voice quality provides information about the anatomical characteristics of the speaker, we verified if there were significant differences in somatotype and body composition between normal and dysphonic speakers. Anthropometric measurements were taken of a sample of 72 adult participants. Perception and acoustic evaluations as well as nasoendoscopy were used to assign speakers into […]

In this paper we study eigenfunctions and fundamental solutions for the three parameter fractional Laplace operator where the fractional derivatives are in the Caputo sense. Applying integral transform methods we describe a complete family of eigenfunctions and fundamental solutions of this operator in classes of functions admitting a summable fractional derivative. The solutions are expressed […]

In this work we study the harmonic analysis in the gyrogroup of proper velocities (PV) using the gyro-language of the analytic hyperbolic geometry developed by A.A. Ungar. PV addition is the relativistic addition of proper velocities in special relativity and it is related with the hyperboloid model of hyperbolic geometry. We study the generalized translation […]