Search Results - João Paulo N. Torres
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A New Hybrid Finite Element Method: Electromagnetic Propagation in Bent Waveguides
Published 2020-01-01Get full textA new hybrid finite element method (HFEM) was developed, using basis functions of first and second order, to analyse the electromagnetic wave propagation in three types of waveguides: disk waveguides, ring waveguides and cylindrical waveguides. For validation purposes, results obtained with the HFEM...
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Exploiting Extraordinary Optical Transmission in Plasmonic Slit Nanoantennas for Sensor Applications
Published 2024-01-01Get full textIn this article, a plasmonic gold nanoantenna is proposed as a sensor to monitor refractive index variations between 1.30 and 1.35. These values are defined since they are characteristic of, for instance, water-based solutions, DNA, or haemoglobin. To simulate the device a novel model is used, which...
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Experimental determination of Arrhenius degradation coefficients for monocrystalline photovoltaic solar cells
Published 2025-12-01Get full textAs photovoltaic solar technology plays a pivotal role in the transition to renewable energy, concerns about long-term performance still persist. This research aims to investigate and model the ageing effects in photovoltaic solar cells, defining power and voltage degradation coefficients. Monocrysta...
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Incorporation of Piezoelectric Materials in Military Uniforms
Published 2025-01-01Get full textThis research deals with one of the possible ways of energy harvesting in military missions, using piezoelectricity as a fundamental basis for generating this energy. It harnesses the energy of the soldier when moving, especially on the battlefield or during long missions where a soldier needs exter...
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