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- Acupuntura no tratamento de omalgia: estudo de casoPublication . Pisco, Joana Ramos
- Bridging generations through integrative learning, research, and community care : The ESPIEM ProjectPublication . Auxtero, Maria Deolinda; Costa, Isabel Margarida; Brito, José; Figueiredo, Alexandra; Ascenso, Carla; Miranda, Margarida; Caneiras, Cátia; Fernandes, Ana IsabelCommunication abstract presented at the EAFP Annual Conference 2025 – “Pharmaceutical Education & Research: SWOT Analysis”. Faculty of Pharmacy, University of Coimbra, 13th-15th of May 2025
- Desafíos y etapas en el diseño y clasificación de un conjunto de datos de caliza utilizando métodos inteligentes Actividades experimentales en la industria de la piedra caliza.Publication . TOMÁS TERESO, MARCO ALEXANDRE; Vardasca, Ricardo; DA FONSECA BENTO, FERNANDO JOSÉ; Pratas, AntonioLa Inteligencia Artificial (IA) y sus áreas derivadas se integran cada vez más en las tareas diarias, trayendo consigo una gama de herramientas destinadas a facilitar y mejorar los procesos cotidianos. La IA tiene diversas áreas de aplicabilidad, y en todas ellas, la calidad de los datos de soporte es crucial. Este estudio aborda esencialmente estrategias para crear y preparar conjuntos de datos de imágenes para modelos de clasificación automática. El conjunto de datos original consta de 2260 imágenes de piedra caliza distribuidas en cuatro clases; es desequilibrado, compuesto por imágenes de diferentes tamaños, y también contiene una zona de borde considerada una zona de desinterés. Para validar el conjunto de datos utilizado y sus transformaciones, se presentan los resultados de la clasificación de imágenes utilizando modelos de Máquinas de Vectores de Soporte (SVM) y Random Forest, ambos con excelentes resultados, siendo el último ligeramente superior. Este estudio es parte integral de un sólido proyecto de investigación que busca aplicar estrategias de detección de defectos a la piedra caliza.
- The impacts of higher education institutions on sustainable software developmentPublication . Chkoniya, Valentina; Batista, Maria Manuela Martins; Gonçalves, Fernando Cruz
- Real-time GPS indoor for USV tracking using lookup tablePublication . Vieira, Fábio; Teodoro, Pedro; Jorge, Pedro MendesThis study introduces an approach that utilizes Lookup Tables (LUT) to enable real-time tracking of an Unmanned Surface Vehicle (USV) in an indoor setting, using a fish-eye camera. The proposed method streamlines image processing and achieves O(1) complexity, significantly reducing application run time. The paper also outlines the process of calibrating the fish-eye camera to correct image distortion, computing the homography matrix for re-projection, and obtaining a virtual top view of the camera’s field of view. The paper provides a detailed explanation of the replacement of the undistortion and re-projection steps with the new LUT method. Experimental results demonstrate a significant enhancement in the process’s run time, making it feasible for real-time tracking, regardless of the image size.
- Some topological properties of the sets of non-negative Wigner functionsPublication . Dias, N. C.The set of non-negative Wigner functions is a convex set which, in the finite dimensional case, is compact and equal to the convex hull of its extreme points. Thus, in finite dimensions, these particular (extreme) Wigner functions can be used to generate the entire set of non-negative Wigner functions. We show that the extreme Wigner functions can be identified by the properties of their null sets, and discuss the problem of constructing these states explicitly. As a by-product, we also elaborate on the properties of the interior and the boundary of the set of non-negative Wigner functions. Finally, if time permits, we will discuss the difficulties of extending some of these results to the infinite dimensional case.
- The effects of intrinsic spin of matter in relativistic cosmologyPublication . Luz, PauloWe discuss general solutions of the Einstein-Cartan theory sourced by a cosmological perfect fluid composed of particles with intrinsic spin. In the considered model, the metric tensor is described by a general FLRW solution, however, the Weyl tensor might not vanish. The coupling between the intrinsic spin and the Weyl tensor excludes spatially closed solutions, and the universe must either be flat or open. In the open case, it is shown that the magnetic part of the Weyl tensor verifies a wave equation, such that, in a dynamic universe, the intrinsic spin of matter leads to the generation and emission of gravitational waves. The properties of these waves are discussed, with an emphasis on their decay rate at late time. Lastly, we discuss that, in the considered cosmological model, the intrinsic spin of matter contributes to a positive accelerated expansion of the universe.