Browsing by Issue Date, starting with "2022-01-19"
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- Infection biomarkers based on metabolomicsPublication . Araújo, Rúben; Bento, Luís; Fonseca, Tiago AH; Von Rekowski, Cristiana; Ribeiro Da Cunha, Bernardo; Calado, CecíliaCurrent infection biomarkers are highly limited since they have low capability to predict infection in the presence of confounding processes such as in non-infectious inflammatory processes, low capability to predict disease outcomes and have limited applications to guide and evaluate therapeutic regimes. Therefore, it is critical to discover and develop new and effective clinical infection biomarkers, especially applicable in patients at risk of developing severe illness and critically ill patients. Ideal biomarkers would effectively help physicians with better patient management, leading to a decrease of severe outcomes, personalize therapies, minimize antibiotics overuse and hospitalization time, and significantly improve patient survival. Metabolomics, by providing a direct insight into the functional metabolic outcome of an organism, presents a highly appealing strategy to discover these biomarkers. The present work reviews the desired main characteristics of infection biomarkers, the main metabolomics strategies to discover these biomarkers and the next steps for developing the area towards effective clinical biomarkers.
- PV generator-fed water pumping system based on a SRM with a multilevel fault-tolerant converterPublication . Fernao Pires, Vitor; Foito, Daniel; Cordeiro, Armando; Chaves, Miguel; Pires, Armando J.This paper presents a pumping system supplied by a PV generator that is based on a switched reluctance machine (SRM). Water pumping systems are fundamental in many applications. Most of them can be used only during the day; therefore, they are highly recommended for use with PV generators. For the interface between the PV panels and the motor, a new multilevel converter is proposed. This converter is designed in order to ensure fault-tolerant capability for open switch faults. The converter is based on two three-level inverters, with some extra switches. Moreover, to reduce the number of switches, the converter is designed to provide inverse currents in the motor windings. Due to the characteristics of this motor, the inverse currents do not change the torque direction. In this way, it was possible to obtain an SRM drive with fault-tolerant capability for transistor faults; it is also a low-cost solution, due to the reduced number of switches and drives. These characteristics of fault-tolerant capability and low cost are important in applications such as water pumping systems supplied by PV generators. The proposed system was verified by several tests that were carried out by a simulation program. The experimental results, obtained from a laboratory prototype, are also presented, with the purpose of validating the simulation tests.
- Wireless multipath video transmission: when IoT video applications meet networking-a surveyPublication . Bhering, Fabiano; Passos, Diego; Ochi, Luiz Satoru; Obraczka, Katia; Albuquerque, CélioAdvances in video camera and wireless communication technology have enabled a variety of video applications over the Internet. However, meeting these applications' quality-of-service requirements poses significant challenges to the underlying network and has attracted significant attention from the networking research community. In particular, wireless multipath video transmission has been proposed as a viable alternative to deliver adequate performance to Internet video applications. This survey provides a thorough review of the current state-of-the-art in multipath video transmission focusing on IoT applications. We introduce a taxonomy to classify existing approaches based on their application-specific mechanisms (e.g., video coding techniques) as well as networking-specific techniques. In addition to describing existing approaches in light of the proposed taxonomy, we also discuss directions for future work.
- Carapinha. Uma encruzilhada afro luso tupiniquimPublication . Souza, Joyce Cristina Santos de; Roldão, Cristina; Bento, DiogoEste relatório diz respeito ao trabalho de projeto Carapinha. Uma encruzilhada afro luso tupiniquim, que tem como objetivo refletir sobre a experiência de mulheres negras e mulheres negras brasileiras no contexto português, mais objetivamente nas artes performativas. A partir das questões de gênero, raça e classe, se investiga os fatores históricos e sociais que fundamentaram a criação de imaginários acerca destes corpos. Entendendo as artes performativas como prática política de intervenção social, a pesquisa vai diagnosticar brevemente grupos e espetáculos teatrais formados e/ou protagonizados por pessoas não brancas, realizados em Portugal. Nomeadamente o Grupo de Teatro Pau Preto, Teatro Griot, Gto Lx: Grupo de Teatro do Oprimido de Lisboa - Laboratório Ami-Afro, Peles Negras Máscaras Negras - Teatro Do Escurecimento, Aurora Negra e Sempre Que Acordo. Assente em práticas e teorias decoloniais e anti-racistas, a pesquisa propõe a percepção das problemáticas apresentadas a partir dos conceitos de encruzilhada e da figura de Exú. Utilizados como estratégia para possíveis transgressões epistêmicas, políticas, estéticas e performativas. O presente relatório apresenta a investigação realizada que resulta na viabilização da ação cênica performativa homônima ao projeto.