Browsing by Issue Date, starting with "2019-07"
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- Avaliação da Segurança Sísmica de Edifícios Existentes em Betão ArmadoPublication . Sousa, Romain; Costa, Alfredo Campos; Costa, Aníbal GuimarãesA avaliação da segurança sísmica de edifícios existentes tem como quadro de referência o Eurocódigo 8 – Parte 3. Tendo em conta que uma parte significativa do território nacional apresenta uma sismicidade moderada a baixa, a aplicação dos procedimentos definidos neste código conduz a análises demasiado complexas para a maioria dos edifícios existentes de pequeno a médio porte. Neste trabalho são propostos dois métodos expeditos que permitem avaliar a resistência sísmica de edifícios de betão armado sem recurso a modelos numéricos, apenas com base nas propriedades geométricas (Método I) e também mecânicas (Método II) dos pilares dos edifícios. Não obstante a simplicidade destes métodos, utilizaram-se no seu desenvolvimento análises probabilísticas de avaliação de segurança sísmica, aplicadas a um universo de estruturas representativas de uma fração relevante do parque habitacional português. Os métodos aqui propostos permitem assegurar idêntico nível de fiabilidade estrutural para diferentes graus de perigosidade sísmica em Portugal, com avaliações mais conservativas para métodos com graus de simplificação crescente.
- Dynamic literacy by seniors for seniors, motivations and expectationsPublication . Lopes, Sara; Mangas, Catarina; Sousa, Jenny; Pimentel, Luísa; Mesquita, MiguelThe focus on lifelong learning, such as the creation of new educational responses that contribute to the empowerment of people and communities, as well as the recognition and valuation of multiple contexts where people acquire and share their knowledge in order to achieve universal literacy, has guided the European policy guidelines. In this article we present some results of a lifelong learning project – PROALFA, which promotes literacy workshops, focuses on learning to read and write and are directed at elderly people in residential structures. The workshops are performed voluntarily by adults, in retirement, who are students of a senior training programme of a Portuguese higher education institution. The aim is to understand the main motives, expectations and the driving forces that leads them to participate in a voluntary way, in these educational activities, meet the participants of the workshop, interact personally with them and their literacy aspects. The data we present is based on a qualitative approach, using: i) techniques of semi-structured interview, for the 4 senior facilitators of the workshop; and ii) documentary research, for the characterization of the 16 participants in the activity. We can conclude that the need to share knowledge and experiences, mutually stimulate cognition and interaction with near generations, are the main reason that lead seniors to streamline a socioeducational activity. In Portuguese society this project can be understood as good practice in adult education and for the future elderly.
- Student's profile vs. teacher's profile: Convergence and divergence in the 1st cycle of basic educationPublication . Mangas, Catarina; Lopes, Sara; Sousa, JennyIn Portugal, Compulsory Education is for all children and young people between the ages of six and eighteen, and it is hoped that at the end of this period they will reach a specific profile, recently determined by the Ministry of Education. One of the main educational actors is undoubtedly the teacher who has a central role in the definition of strategies and methodologies which are directed towards the expected profile of the student. This means that the teacher's own profile, from the first years of schooling, should ensure that the teacher has characteristics which are conducive to the determination of a teaching-learning environment where students construct the multiple literacies that seem necessary to respond to the demands of our current society. The article intends to present an analysis of content around the documents that regulate the profile of the teacher of the 1st Cycle of Basic Education, in articulation with the profile of students leaving compulsory education, so as to look for points of convergence and divergence that foster reflection on the contribution of these two poles to the success of students and the education system itself. The results showed that it is necessary to rethink the teacher’s profile in order to be more in accordance with the Profile of students leaving compulsory education.
- Oxytetracycline accumulation in the macroalgae Ulva: Potential risks for IMTA systemsPublication . Rosa, João; Leston, Sara; Freitas, Andreia; Pouca, Ana Sofia Vila; Barbosa, Jorge; Lemos, Marco F. L.; Pardal, Miguel A.; Ramos, FernandoOxytetracycline (OTC) is one of the most used antibiotics in aquaculture. With the development of Integrated Multitrophic Aquaculture (IMTA) systems in order to mitigate some aquacultures' adverse effects, attention needs to be shifted to other co-cultured species that can also accumulate such pharmaceuticals and pose a risk to human consumption. Therefore, the present work evaluated the exposure of the seaweed Ulva to OTC at two realistic concentrations (0.040 and 0.120 mg L1 ). Oxytetracycline degradation rates in seawater were dependent on the initial concentration but were not influenced by the presence of Ulva. The macroalgae presented good assimilation rates of OTC, with internal concentrations reaching 40.9934 ng g1 WW for the lowest concentration tested and 108.6787 ng g1 WW for the highest, with a steep decrease after 48 and 24 h, respectively. Nonetheless, concentrations were still half of the Maximum Residue Limit set for fish (100 mg kg1) 48 h after C2 treatment. The highest dosage tested stimulated growth 96 h after the beginning of the trial, although some signs of decay could also be found in Ulva's fronds.
- Review of Strategies for Modelling Beam-to-Column Connections in Existing Precast Industrial Rc BuildingsPublication . Sousa, Romain; Batalha, Nádia; Rodrigues, HugoIn recent earthquakes, it has been observed that precast RC structures has shown, in several cases, a poor performance presenting damages on structural and non-structural elements, highlighting the vulnerability of industrial buildings. Beam-to-column connection was pointed as one of the main source of damage. Precast concrete buildings are common in the industrial parks. One-story industrial building constituted by a frame system of beams and columns, with hinged beam-to-column connection are the most common structural configuration. In this way, it is important to characterize this type of buildings to understand its seismic behavior in order to develop new methodologies and solutions for design this type of buildings and improve your performance. The presented work is focused on beam-tocolumn connections that play a determining role on precast structures. The proposed work is the review of the different strategies to model beam-to-column connections in a precast industrial RC building is presented. To perform the analyses, the structural software Opensees was chosen. Nonlinear static analyses were performed. The results are presented and discussed.
- Uma solução híbrida integrada de elevado nível criptográfico para autenticação de produtosPublication . Silva, Daniel P.; Silva, Ruben J. G.; Mateus, Gonçalo N. S.; Mateus, Artur J. S.; Carreira, Pedro J. S.; Santos, CyrilDevido à crescente contrafação de produtos nos mais variados setores de atividade, surge a necessidade de incorporar nesses mesmos, sistemas de identificação que permitam determinar a sua autenticidade e suportar as investidas de falsificação pela replicação indevida das tecnologias atuais. O presente projeto pretende apresentar uma nova abordagem que assenta na incorporação de um dispositivo híbrido patenteado, com propriedades óticas que lhe conferem um grau de criptografia elevado, em peças obtidas por moldação por injeção (embalagens e peças estruturais ou funcionais) com o intuito de obter uma solução integrada inviolável, mas eficaz e de análise intuitiva.
- Desafios matemáticos – 20 anos de problemas para os primeiros anosPublication . Tavares, Dina; Pinto, Hélia; Menino, Hugo; Rocha, Isabel; Rodrigues, Marina; Rainho, Nuno; Cadima, Rita; Costa, Rogério
- Learning and Teaching in and with the Local Community: The Use of a Critical and Innovative Methodology in ESECS / IPLeiria.Publication . Sousa, Jenny; Milhano, Sandrina; Lopes, Sara; Mangas, CatarinaThis work presents and reflects on a pedagogical experience conducted at the School of Education and Social Sciences of the Polytechnic Institute of Leiria, with undergraduate students in Social Education. This experience carried over the past three years (2015-2018) focuses on the use of teaching-learning methodologies. They are operationalized in active collaboration with local community entities / institutions - schools at all levels of education, support institutions for the elderly, people with disabilities, people in situations of marginalization and social exclusion, health institutions, local development institutions, cultural equipment, among others - which become privileged contexts for student training. Being the social educator a relationship agent that acts with educational intention in different contexts of social intervention, this professional training encourages the use of new teaching-learning methodologies. Thus, in the Community Animation Strategies course unit, students are challenged to work on projects where, within a group, they apply theoretical knowledge and carry out a socio-educational intervention in the chosen local community entity / institution, meeting the needs felt by the entity institution, or by the target audience belonging to it. Students are challenged to be the protagonists in building their knowledge [5]).This construction is done, in parallel, in different contexts: at classroom and at entities chosen by students, in a dialogical and collaborative relationship between practical intervention and theoretical reflection. These three years of experience allow us to verify that this methodology of learning in practical context results in benefits for the students. Based on the content analysis of the individual reflective reports carried out by each of the students – in a total of 123 students - the idea standing out is that this methodology allows students to practice and test the theoretical contents learned at the classroom bringing at the same time, real contexts challenges to the classroom of [4]. In addition, it favors the acquisition of cognitive, non-cognitive and social-emotional skills in a more solid construction of the social educator's professional profile. It’s hoped that the experience described here will help to deepen reflection on teaching-learning methodologies in Higher Education within a framework of involvement with the local community.
- Relatório Anual (2018.2019) - 2º ano da Licenciatura em Relações Comerciais China-Países LusófonosPublication . Mangas, Catarina; Milhano, Sandrina; Almeida, AuréliaRelatório que sintetiza a forma como decorreu o ano 2018/2019, perspetivando-se como um instrumento de reflexão e análise sobre as práticas, no sentido de apontar direções para a melhoria da qualidade do processo de ensino-aprendizagem e do consequente aumento de competências por parte dos estudantes.
- A prática na Investigação Qualitativa: exemplos de estudos: Volume 3Publication . Brandão, Catarina; Carvalho, José Luís; Arellano, Rodrigo; Baixinho, Cristina; Ribeiro, JaimeNos últimos anos, a investigação e a divulgação dos seus resultados tem tido uma evolução apreciável, não só em termos de proliferação no número de estudos, mas também na complexidade dos métodos e no rigor no processo. A produtividade exigida a uma nova geração de investigadores, mais bem preparados na sua formação pré e pós-graduada, influencia as práticas, desafia a partilha de experiências e anima a discussão em torno dos paradigmas de investigação, da associação de métodos e técnicas, bem como da necessidade de transparência e da utilização de software nas diferentes etapas. A discussão sobre os paradigmas de investigação e o seu contributo para os padrões de conhecimento continua vincada no debate internacional, o que nos permite afirmar que a pesquisa qualitativa amplamente narrativa, ao firmar-se, fundamentalmente, em dados baseados na linguagem e comportamento, que não podem ser medidos por cálculos numéricos e estatísticos (Santos, Neves, & Carnevale, 2016), precisa de pensar os métodos e técnicas que possibilitam a produção do conhecimento e a sua transferência para os contextos da práxis.