32 documents found, page 1 of 4
Discursos do Presidente: presidência 2016-2025
Margato, ElmanoEsta publicação contém os discursos proferidos pelo Presidente do Instituto Politécnico de Lisboa (IPL), Polytechnic University of Lisbon (PUL), ao longo dos seus dois mandatos, de 14 de março de 2016 a 09 de fevereiro de 2025. Este legado permite conhecer o pensamento estratégico do Presidente, na liderança da equipa cujo trabalho conduziu ao incremento do desenvolvimento científico, pedagógico, artístico, cul...
FFC-NMR power supply with hybrid controlo of the semiconductor devices
Roque, Antonio; Sousa, Duarte M.; Oliveira Sebastião, Pedro José; Vaz da Silva, Vitor; Margato, ElmanoThe performance of FFC-NMR power supplies is evaluated not only considering the technique requirements but also comparing efficiencies and power consumption. Since the characteristics of FFC-NMR power supplies depend on the power circuit topology and on the control solutions, the control design is a core aspect for the development of new FFC systems. A new hybrid solution is described that allows controlling th...
Nistagmo infantil: uma condição inócua ou algo mais? A propósito de um caso clí...
Margato, Elmano; Sebastião, RitaIntrodução: O nistagmo infantil pode ou não estar associado a alterações visuais e/ou neurológicas e constitui uma entidade incomum e pouco observada na prática clínica em medicina geral e familiar. Procurou-se, assim, perceber como deve o médico de família atuar perante esta condição.Descrição do caso: Descreve-se o caso de um lactente sem antecedentes pessoais ou familiares de relevo, tendo o médico de famíli...
Temperature distribution of a Fast-Field Cycling Nuclear Magnetic Resonance rel...
Videira, P.; Sebastião, P.; Roque, A.; Sousa, D. M.; Fernandes, A.; Margato, ElmanoThe temperature distribution of a Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) electromagnet plays an important role in the operation of this type of apparatus. The designed electromagnet presents a reduced volume and is iron and copper based, fulfilling the technical requirements for the magnetic field. With this solution, it is possible to increase the overall performance in comparison with forme...
Fast-Field Cycling Nuclear Magnetic Resonance relaxometer's electromagnet with ...
Videira, P.; Sebastião, P.; Roque, A.; Sousa, D. M.; Margato, ElmanoIn this article a Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) electromagnet with low power consumption (less than 200 W), high field homogeneity and reduced volume is projected and described. The electromagnet is iron and copper based, possessing a high permeability and allowing for good magnetic field homogeneity in the operating range of 0 to 0.33 T. With this solution, it is possible to increas...
FFC NMR relaxometer with magnetic flux density control
Roque, Antonio; Duarte M. Sousa, Duarte; Sebastiao, Pedro; Margato, Elmano; Marques, GilThis paper describes an innovative solution for the power supply of a fast field cycling (FFC) nuclear magnetic resonance (NMR) spectrometer considering its low power consumption, portability and low cost. In FFC cores, the magnetic flux density must be controlled in order to perform magnetic flux density cycles with short transients, while maintaining the magnetic flux density levels with high accuracy and hom...
Input output linearization and PI controllers for AC-AC matrix converter based ...
Gamboa, Paulo; Silva, J. Fernando; Pinto, Sonia; Margato, ElmanoThis paper presents the theoretical development and performance of novel Input-Output Linearization (IOL) AC voltage controllers applied to Dynamic Voltage Restorers (DVR) with Flywheel Energy Storage (FES). IOL performance is compared to decoupled proportional integral (PI) controllers, both relying on a backward Euler predictive current controlled AC-AC matrix converter. The critical load AC decoupled voltage...
Discurso do presidente do Instituto Politécnico de Lisboa na sessão de abertura
Margato, ElmanoA Escola Superior de Educação de Lisboa comemora hoje os 100 anos do início da construção do seu edifício sede. Este belo edifício, do qual ainda hoje desfrutamos, da autoria do Arquiteto Arnaldo Adães Bermudes, foi mandado construir pelo Governo da Primeira República para o funcionamento da Escola Normal Primária de Lisboa, posteriormente, Escola do Magistério Primário de Lisboa e, atualmente, Escola Superior ...
Management of an electric vehicle charging system supported by RES and storage ...
Fernao Pires, Vitor; Roque, António; Sousa, Duarte M.; Margato, ElmanoIt is predicted to the near future that electric vehicle (EV) charging systems will have an important impact on the electric infrastructures. Thus, in order to contribute to a sustainable world, the use of renewable energy sources (RES) will play an important role to generate the required energy to the EVs. However, in order to optimize the global electrical efficiency, the RES should be placed as near as possi...
Superconductivity and their applications
Roque, António; Sousa, Duarte M.; Fernão Pires, Vítor; Margato, ElmanoThe research in the field of superconductivity has led to the synthesis of superconducting materials with features that allow you to expand the applicability of this kind of materials. Among the superconducting materials characteristics, the critical temperature of the superconductor is framing the range and type of industrial applications that can benefit from them. Some examples of industrial applications inc...