108 documents found, page 1 of 11
Effect of the seed layer crystalline structure in the growth of zinc-tin oxide ...
Rovisco, Ana; Martins, Jorge; António, Margarida; Viegas, Jaime; Nunes, Daniela; Fortunato, Elvira; Martins, Rodrigo; Branquinho, Rita; Barquinha, PedroMetal oxide nanostructures have recently gained high attention due to advances in their synthesis, particularly hydrothermal techniques, which allow precise control over their morphology, composition, and crystallinity, as well as integration into devices. Zinc-tin oxide (ZTO) nanostructures, in particular, are notable for their sustainability and multifunctional applications, including catalysis, electronics, ...
Transforming Healthcare Through Integration, Innovation and Training: The Medic...
Pimenta, Jorge; J Ferreira, Joaquim; Quaresma, Carmen; Gomes, Paulo; Pereira da Silva, Alda; Abreu, Ana; Guerreiro, Tiago; Fernandes, SusanaThe Medicina ULisboa-Torres Vedras Campus is an innovative, multidisciplinary academic healthcare model that integrates clinical care, academic training, research, and innovation. Committed to shaping the future of healthcare, the Campus focuses on developing new approaches supported by interdisciplinary care and advanced technologies to tackle both current and emerging challenges. Situated in Torres Vedras—a r...
Syringe irrigation in confluent canals: A sequential computational fluid dynami...
Rito Pereira, Mário; Silva, Goncalo; Semiao, Viriato; Martins, Jorge; Silverio, Vania; Pascoal-Faria, Paula; Duarte, Isabel; Alves, NunoThis study aims to assess the influence of root canal preparation, irrigation needle design and its placement depth in the irrigation flow of confluent canals during syringe irrigation. A mandibular molar presenting two confluent canals in its mesial root was sequentially prepared and scanned by micro-computed tomography after mechanical preparation up to ProTaper Next system sizes X2 (25/.06v), X3 (30/.07v) an...
Suppression of back electron recombination on the photoanode-electrolyte interf...
Rodrigues, Daniela F.S.L.; Martins, Jorge; SAUVAGE, Frédéric; Abreu, Carlos M.R.; Serra, Arménio; Ivanou, Dzmitry; Mendes, Adélio; Coelho, JorgeDye-sensitized solar cells (DSSC) are one of the most intensively developing PV technology to meet the emerging needs of wireless power for billions of IoT devices and wireless electronics; DSSCs have recently entered the indoor PV market. Suppressors of back electron recombination on the photoanode-electrolyte interface, also known as co-adsorbents, are key components of the DSSCs to obtain high power conversi...
Combustion instability and ash agglomeration in wood pellets boiler
Fraga, Lelis; Ferreira, Manuel Eduardo Cardoso; Ribeiro, Pedro Emanuel Abreu; Castro, Carlos Eduardo Rodrigues; Martins, Jorge; Teixeira, J. CarlosThe combustion instability and ash agglomeration in a wood pellet boiler were investigated in this study. The tests were conducted using the Taguchi method of orthogonal array L<sub>27</sub>(13<sup>3</sup>). Several parameters are applied, including grate area (GA), primary to secondary air split ratio (SR), excess air (EA), and fuel power (P). Pine wood pellets were used, and the boiler’s nominal load was 20 k...
Turpentine as an additive for diesel engines: experimental study on pollutant e...
Chivu, Robert Mădălin; Martins, Jorge; Popescu, Florin; Uzuneanu, Krisztina; Ion, Ion V.; Gonçalves, Margarida; Codau, Teodor Cezar; Onofrei, ElenaThe need for reducing fossil fuel consumption and greenhouse gas (GHG) emissions in internal combustion engines has raised the opportunity for the use of renewable energy sources. For the progressive replacement of fossil fuels like diesel, those derived from the sustainable management of forest resources may be a good option. In Portugal, pine trees (pinus pinaster) are among the most widely cultivated tree sp...
Relatório de Estágio Curricular – Fidizzi, Lda (Coimbra)
Martins, JorgeO presente relatório descreve o decurso do estágio curricular do curso de Técnico Superior Profissional (CTeSP) em Análise de Dados da Escola Superior de Tecnologia e Gestão do Instituto Politécnico da Guarda realizado na empresa FIDIZZI. Este estágio teve como objetivo o estudo da plataforma de CRM Salesforce, de maneira que o estagiário conseguisse ter uma visão geral das funcionalidades e potencialidades des...
Long-term management practices successfully reduce bird-related electrical faul...
Moreira, Francisco; Martins, Ricardo C.; Aguilar, Francisco F.; Canhoto, António; Martins, Jorge; Moreira, José; Bernardino, JoanaBird nests on transmission lines can cause electrical faults which reduce service reliability. To address this problem, since the mid-90s, the Portuguese Transmission System Operator (TSO) has undertaken management actions to discourage white storks Ciconia ciconia from nesting in hazardous locations of the pylons. Here, we compiled and analyzed an 18-year series of data on electrical faults, TSO management act...
Análise de desempenho e exploração das potencialidades de um protótipo de mediç...
Sousa, Jorge; Martins, Jorge; Palha, Carlos Alberto Oliveira Fernandes; Machado, Lúcio Manuel Alves; Freitas, E. F.O MAPA é equipamento concebido para a medição do atrito em pavimentos, dotado de um software de controlo e aquisição de dados que permite efetuar a variação de parâmetros como a taxa de deslizamento, a espessura da lâmina líquida, a frequência de registo de dados, entre outros. Além disso, possui um eixo que permite a colocação de rodas/pneus de pequeno e de grande diâmetro, o que viabiliza a utilização de pneu...
Experimental validation of a computational fluid dynamics model using micro‐par...
Pereira, Mário; Silva, Gonçalo; Semiao, Viriato; Silverio, Vania; Martins, Jorge; Pascoal-Faria, Paula; Alves, Nuno; Dias, Juliana; Ginjeira, AntónioThis study aimed to experimentally validate a computational fluid dynamics (CFD) model, using micro-particle image velocimetry (micro-PIV) measurements of the irrigation flow velocity field developed in confluent canals during irrigation with a side-vented needle. A microchip with confluent canals, manufactured in polydimethylsiloxane was used in a micro-PIV analysis of the irrigation flow using a side-vented n...