Em 2020, a União Europeia (UE) lançou o Plano de Ação para a Educação Digital (2021-2027) – Reconfigurar a educação e a formação para a era digital – numa iniciativa política que pretende apoiar a adaptação dos sistemas de ensino dos Estados-Membros à designada era digital, e no sentido de assegurar uma educação digital de elevada qualidade, inclusiva e acessível na Europa: Em Portugal está em curso um Programa...
Memórias dos antigos trabalhadores da Ilha do Principe; Instituto Camões - Cooperação Portuguesa
Photovoltaic power forecasting is essential for maintaining electric grid stability and efficiently integrating solar energy power plants into the national power generation system. However, it remains challenging due to the complexity of accurately predicting solar radiation across varying weather conditions and diverse photovoltaic system configurations. This study addresses these challenges by developing a no...
A liberdade de expressão é um direito humano fundamental, sendo considerado por diversas convenções internacionais, nomeadamente a Convenção sobre os Direitos da Criança (1989), que reconhece, no artigo 12.º, que a criança tem o direito de exprimir livremente a sua opinião sobre questões que lhe digam respeito e de ver essa opinião tomada em consideração. Por seu lado, a UNESCO (Grizzle et al., 2021) reconhece-...
Freedom of expression is a fundamental human right and is recognised by various international conventions, including the Convention on the Rights of the Child (1989), which states in Article 12 that children have the right to freely express their opinion on matters that concern them and to have that opinion taken into account. For its part, UNESCO (Grizzle et al., 2021) recognises this as a value and attitude t...
In the digital environment, as well in their offline lives, children and youth have the right to freedom of expression as well the right of participation. Research on children’s participation and voice in the media is expanding, although the objectives and the actual actions of their participation is less studied. In this study, using conceptualisations of children and youth1 media participation as social inter...
Children and media are today a reasonably developed research field. However, little research has been conducted on children and radio. This paper aims to contribute to the debate on radio for children in the digital age by analysing Zig Zag, a Portuguese public Internet radio for a child audience aged 5 to 9, launched in 2016. It seeks to answer the question: what are the principles and objectives that guide th...
Solar photovoltaic power plants typically consist of rows of solar panels, where the accurate estimation of solar irradiance on inclined surfaces significantly impacts energy generation. Existing practices often only account for the first row, neglecting shading from subsequent rows. In this work, ten transposition models were assessed against experimental data and a transposition model for inner rows was devel...
This study presents an assessment of thermal modeling for photovoltaic modules, focusing on power output prediction using manufacturer-provided data along with irradiance and weather-related variables. Several steady-state thermal models based on empirical correlations were evaluated for computing the temperature of the photovoltaic module. Additionally, a dynamic model was developed based on the energy conserv...
This paper presents a study on the influence of Sun-Earth geometry and atmospheric variables on the predictions of solar global irradiation (GHI) obtained from the ECMWF model. It was found that the differences between predictions and measurements of GHI are correlated mainly with the clearness index, solar zenith angle, mean air temperature, relative humidity and total water column. An artificial neural networ...