Browsing by Issue Date, starting with "2021-11-15"
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- Economic and energy feasibility using photovoltaic solar energy sources as a response to the energy consumption of the municipality of BarcarenaPublication . Simões, Fábio; Viveiros, Carla; Barata, FilipeThis article provides an economic and energy feasibility study for the implementation of renewable photovoltaic energy sources, in the municipality of Barcarena, in order to sustain electric energy consumption, taking into account technological advances, the expected population increase and the energy potential of the study area. The consumption of electricity of the municipality under study is analysed, as well as their distribution among the various types of existing electricity production. The economic and energy influence of this implementation is analysed through different case studies, in order to meet the targets defined by the Oeiras Council with regard to the Sustainable Energy for Oeiras Action Plan (PAESO).
- A "studio class" como experiência pedagógica nas etapas iniciais do processo de ensino-aprendizagem do violinoPublication . Costa, Carolina Inês Moura Campos; Neto, TiagoResumo I - O presente Relatório de Estágio reflete sobre a Prática Pedagógica desenvolvida no âmbito da Unidade Curricular de Estágio do Ensino Especializado do Mestrado em Ensino de Música, da Escola Superior de Música de Lisboa. No relatório é feita uma caracterização do Conservatório de Música de Cascais, escola onde decorreu o estágio. Procede-se à contextualização histórica da instituição, sua organização e funcionamento, bem como à exposição dos seus objetivos pedagógicos. Seguidamente, são apresentados os documentos orientadores que regulam a ação educativa, as matrizes e os conteúdos programáticos da disciplina de Violino e respetivos critérios de avaliação. A descrição da Prática Pedagógica realizada é fundamentada pelo registo das aulas lecionadas e respetivas planificações e pelos registos de avaliação dos alunos. Os planos de aula apresentados traduzem a forma como foi feita a gestão do tempo e quais os processos de ensino-aprendizagem adotados de acordo com o perfil e capacidades dos alunos. A sua elaboração foi uma ajuda essencial na organização e desenvolvimento da prática pedagógica e um importante contributo para a evolução da aprendizagem dos alunos. Faz-se uma análise crítica sobre a prática pedagógica desenvolvida. Apresenta-se, ainda, uma reflexão sobre a participação na escola e na relação com a comunidade educativa, assim como as necessidades de formação contínua.
- Thermo-mechanical design optimization of symmetric and non-symmetric sandwich plates with ceramic-metal-ceramic functionally graded core to minimize stress, deformation and massPublication . Moleiro, Filipa; Madeira, Jose Firmino Aguilar; Carrera, E.; Ferreira, A. J. M.This work explores the multiobjective design optimization of symmetric and non-symmetric sandwich plates with ceramic-metal-ceramic functionally graded (FG) core, along with ceramic faces (if included), under thermo-mechanical loadings. The FG core is made of two functionally graded material (FGM) layers, each with the volume fractions of the constituent phases defined by a power-law function through-thickness, with the interface between them metal-rich and the core outer surfaces ceramic-rich. In line with symmetric or nonsymmetric sandwich plates, the design variables involve the thickness of each FGM layer of the core and the index of its power-law function, along with the thickness of each ceramic face. The thermal and mechanical problems are fully coupled using a layerwise mixed least-squares model with multi-field independent variables, including, most importantly, displacements, temperature and transverse stresses. The FG core z-continuous effective properties are also fully described by high-order z-expansions, as demonstrated adopting the rule of mixtures. The multiobjective optimization problem is solved by Direct MultiSearch derivative-free method, minimizing mass, transverse displacement and the stress field, measured by Tsai-Hill failure criteria, all together. Numerical results provide optimal symmetric and non-symmetric sandwich plates with ceramicmetal-ceramic FG core, considering distinct constituent materials and including three-dimensional approximate solutions for validation.
- Film journalism: ways to build a definitionPublication . Lourenço, Jaime; Centeno, Maria JoãoFilm Journalism as a study object is still unexplored by social and communication sciences. It must be understood as a particular field of cultural journalism, assuming itself as a journalistic practice that focus on the cultural and artistic activity, that marked the 20th century and insists on following into the 21st century, the Cinema. Viewed as a subgenre of cultural journalism, Film Journalism assumes itself as an informative, critical, and pedagogical field. In the current article, in face of the scarcity of investigations about this topic in Portugal and based on semi-structured interviews to the main Portuguese journalists who daily dedicate themselves to the coverage of cinema, we seek to contribute towards the definition of Film Journalism as a journalistic practice insert in the scope of cultural journalism.
- Catalyzed pyrolysis of coffee and tea wastesPublication . Rijo, Bruna; Soares Dias, A. P.; Ramos, Marta; Jesus, Nicole de; Puna, JaimeThe pyrolysis of food waste has a double environmental advantage as it contributes to the management and treatment of waste and allows the production of renewable fuels. Spent coffee and tea grounds, were characterized by thermogravimetry to determine their composition and evaluating the pyrolysis kinetics of each lignocellulosic pseudocomponent and pyrolyzed in a fixed bed reactor. Tea grounds had about twice the cellulose and higher pyrolysis activation energy than the coffee grounds sample. At 673 K the pyrolysis of the coffee grounds led to a 42% bio-oil yield while the tea grounds produced only 18% of liquid product, which is compatible with its higher cellulose content and the higher activation energy for pyrolysis. The alkaline carbonates used as pyrolysis catalysts led to an increase in the production of a gaseous product, bio-gas, with a reduction in the production of bio-oil but accompanied by a significant increase in the volatile fraction of the produced bio-oils. Pyrolysis data shows that both coffee and tea residues can be used as raw materials to produce pyrolysis bio-oil and that low-value materials such as alkaline carbonates can be used as pyrolysis catalysts improving the characteristics of bio-oils produced such as acidity and volatility.