Browsing by Author "Rodrigues, Sara"
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- A cidadania e as TIC: projeto no 1º CEBPublication . Quadros-Flores, Paula; Eça, Luísa; Rodrigues, Sara; Quintas, Ana CristinaA escola, enquanto comunidade, imprime possibilidades de relações plurais que superam os programas curriculares e contribuem para o desenvolvimento integral dos alunos. Assim, o presente artigo reflete o modo como as TIC podem modificar contextos e motivações ao nível dos alunos, do professor, da escola e dos encarregados de educação. Neste contexto, alunas da formação inicial de professores implementaram o projeto “Vokimania” em contexto real e, espera-se, que a disseminação do mesmo possa instigar outros contextos educativos à realização de boas práticas com recursos tecnológicos e, deste modo, contribuir para a renovação das práticas pedagógicas.
- Gasification of Cork Wastes in a Fluidized Bed ReactorPublication . Rodrigues, Sara; Almeida, Ana F.; Ribeiro, A.M.; Neto, Paula; Ramalho, Elisa; Pilão, Rosa MariaBiomass gasification has been identified as an option for energetic valorisation of organic wastes. This work aimed to study the gasification of cork industry wastes using a semi-batch fluidized bed reactor. The experimental tests were performed using air as oxidizing agent and sand particles as bed material. The heating was performed with an electrical resistance of 3 kW. The effect of biomass load (2–5.6 g), and bed temperature (780–900 °C) on gasification performance was evaluated using an air flow rate of 0.092 g/s. Samples of producer gas were analysed by a gas chromatograph fitted with a thermal conductivity detector. The detected and quantified compounds on producer gas were H2, CO, CH4 and CO2. Temperature and mass load had a predominant role in gasification performance and all gasification parameters increased with the temperature rise. The increase of mass resulted in a decrease of carbon conversion efficiency, cold gas efficiency and dry gas yield. Best results were obtained with mass load at a range of of 2–4 g, working at 850 °C. The results showed that cork particles are a sustainable raw material for gasification processes.
- Impacto do tipo de encosto na distribuição de pressões após push-up em pessoas com lesão medularPublication . Rodrigues, Sara; Almeida, Carlos; Machado, Nuno; Fernandes, ÂngelaA lesão medular (LM) apresenta uma elevada prevalência. Na Europa há cerca de 330 mil indivíduos com lesão medular (LM) e Portugal apresenta a maior taxa de incidência de LM traumáticas (Barbiellini Amidei et al., 2022). Além disso, sabe-se que 75% dos usuários de cadeira de rodas (CR) são indivíduos com LM. A prescrição da cadeira mais adequada, leva a melhorias na participação e diminuição de problemas secundários como as úlceras de pressão, no entanto os estudos nesta área focam maioritariamente o assento/almofada e não o encosto (Fadil et al., 2022; Pedersen et al., 2022).
- Life cycle assessment of bioethanol from corn stover from soil phytoremediationPublication . Mata, Teresa M.; Rodrigues, Sara; Caetano, Nídia; Martins, António A.Bioethanol is the most widely used biofuel in the world. Bioethanol production from biomass is a way to reduce crude oil consumption and the environmental pollution. This work aims to evaluate the potential environmental impacts of bioethanol production from corn stover obtained from phytoremediation, comparing four different acids (Sulfuric, Nitric, Hydrochloric and Acetic acids) to perform the biomass pre-treatment. The study follows a life cycle thinking perspective, accounting for all the life cycle stages from corn stover grinding, to biomass pre-treatment, enzymatic hydrolysis, fermentation, filtration and ethanol distillation, on a “gate-to-gate” approach. The life cycle inventory was developed using mainly primary data from laboratorial experiments, and complemented whenever necessary with information from literature and from the Ecoinvent V3.0 database available in the SimaPro 8.0.2 software. For the environmental impact assessment, the ILCD Midpoint 2011 methodology was used. Results show that in general, the sulfuric and hydrochloric acids have a better environmental performance than the acetic and nitric acids. Also, results show that pre-treatment, followed by enzymatic hydrolysis are the process steps with the highest relative contribution to the potential environmental impacts. Thus, an improvement analysis should focus on these process steps, for example to reduce fossil energy consumption by implementing renewable energy sources.