Diogo Nuno Freitas

Interactive Technologies Institute (ITI/LARSyS), NOVA-LINCS

Finding approximations to the zeros or roots of nonlinear functions is a task that is often required in various applications in different fields of science and engineering. Although there are many iterative methods that can be used for finding such roots, they typically need good initial approximations to converge, and a number of them also demand...

The Cyclic Alternating Pattern (CAP) is a periodic activity detected in the electroencephalogram (EEG) signals. This pattern was identified as a marker of unstable sleep with several possible clinical applications; however, there is a need to develop automatic methodologies to facilitate real-world applications based on CAP assessment. Therefore, a...

Methodologies for automatic non-rapid eye movement and cyclic alternating pattern analysis were proposed to examine the signal from one electroencephalogram monopolar derivation for the A phase, cyclic alternating pattern cycles, and cyclic alternating pattern rate assessments. A population composed of subjects free of neurological disorders and su...

Biomedical decision making involves multiple signal processing, either from different sensors or from different channels. In both cases, information fusion plays a significant role. A deep learning based electroencephalogram channels' feature level fusion is carried out in this work for the electroencephalogram cyclic alternating pattern A phase cl...

Finding arbitrary roots of polynomials is a fundamental problem in various areas of science and engineering. A myriad of methods was suggested to address this problem, such as the sequential Newton’s method and the Durand–Kerner (D–K) simultaneous iterative method. The sequential iterative methods, on the one hand, need to use a deflation procedure...

Optimisation is a branch of mathematics that was developed to find the optimal solutions, among all the possible ones, for a given problem. Applications of optimisation techniques are currently employed in engineering, computing, and industrial problems. Therefore, optimisation is a very active research area, leading to the publication of a large n...

This paper focuses on the common mistakes made by students at the early stages of research when writing scientific papers, thesis and reports. It points out mistakes to be avoided and the basic rules that can be inferred by reading a few scientific documents but are not usually clearly written and that we, as professors, end up teaching over and ov...

The Particle Swarm Optimisation (PSO) algorithm was inspired by the social and biological behaviour of bird flocks searching for food sources. In this nature-based algorithm, individuals are referred to as particles and fly through the search space seeking for the global best position that minimises (or maximises) a given problem. Today, PSO is one...

Embora a igualdade de género se encontre legalmente formalizada, os homens e as mulheres continuam a participar de forma distinta na sociedade, tal como atestam as estatísticas da Universidade da Madeira, onde em 2018/19, num total de 110 estudantes matriculados nos cursos de Formação de Professores para a Educação Infantil, apenas 3 são homens. Pa...

Although gender equality is legally formalised, men and women continue to participate distinctly in society. This idea, corroborated by the numbers of the University of Madeira which show us that, in a total of 110 students enrolled in Early Childhood Education degrees, only 3 are men, took us to this research. We developed a descriptive case study...

There are many iterative methods for finding all the zeros of a polynomial sequentially or simultaneously. However, the determination of all zeros of a given polynomial by one of the methods that find one zero at a time involves repeated deflations, which leads to the accumulation of rounding errors and inaccurate results. In turn, the simultaneous...

A substantial part of rehabilitation tools are developed in the context of research projects, which rarely reach their target audience, in particular clinicians and patients. To address this challenge, the Open Rehab Initiative (ORI) emerged as an international independent online portal with the goal of connecting clinicians, scientists, engineers,...