Fatores escolares do envolvimento dos alunos na escola : um estudo com alunos adolescentes

Tese de mestrado, Educação (Área de especialização Formação Pessoal e Social), Universidade de Lisboa, Instituto de Educação, 2015

Caracterização da marcação imunohistoquímica da protein gene product 9.5 (PGP 9.5) em células astrocitárias

Tese de mestrado, Neurociências, Faculdade de Medicina, Universidade de Lisboa, 2015

Fairness in assessing group projects: a conceptual framework for higher education

Group projects form a large and possibly growing component of the work undertaken for assessing students in higher education, and especially in post-graduate work in business. Yet the assessments sources, methods and purposes result in an array of combinations that the literature fails to capture in its full complexity. Tutors may be able to assess the work of the group as well as they might the work of any individual. But grades - and degrees - are awarded to individuals. Writers on higher education speak of using self- and peer-assessment as a way of qualifying the evaluation of group work so as to differentiate between individuals. But these commonly used terms - drawn from approaches to assessing individual work - are ambiguous or even misleading in the context of group work. This paper proposes a framework for discussing the assessment of group projects in an effort to help identify how the benefits of group learning and be translated into fairer summative assessments.

Drink availability is associated with enhanced examination performance in adults

While dehydration has negative effects on memory and attention, few studies have investigated whether drinking water can enhance cognitive performance, and none have addressed this in a real-world setting. In this study we explored the potential benefits of the availability of water for undergraduates. The exam performance of students who brought drinks in to exams was compared with those that did not for three cohorts of undergraduates (N = 447). We employed earlier coursework marks as a measure of underlying ability. Students who brought water to the exam achieved better grades than students who did not. When coursework marks were covaried, this effect remained statistically significant, suggesting that this finding was not simply due to more able students being more likely to bring in water. This implies that water consumption may facilitate performance in real-world settings, and, therefore, have specific implications for the assessment of undergraduate learners under examination conditions, but further research is required to evaluate this hypothesis.

Desenvolvimento lexical: perspectivas e práticas de professores no 1.º ciclo do ensino básico

Dissertação apresentada à Escola Superior de Educação de Lisboa para a obtenção de grau de Mestre em Didática da Língua Portuguesa no 1.º e 2.º Ciclos do Ensino Básico

Porque ler não chega… da biblioteca escolar à sala de aula: um percurso de leitura e escrita

Projeto de Intervenção apresentado à Escola Superior de Educação de Lisboa para a obtenção de grau de Mestre em Didática da Língua Portuguesa no 1º e 2º CEB

Estudo de uma tomada de água em modelo reduzido

Dissertação para obtenção do grau de Mestre em Engenharia Civil na Área de Especialização em hidráulica

Avaliação de qualidade de energia de um sistema fotovoltaico numa rede elétrica

Dissertação para obtenção do grau de Mestre em Engenharia Electrotécnica Ramo de Energia

Análise da problemática da exposição dos músicos ao ruído: perceção ao ruído e determinação dos níveis de pressão sonora na prática musical em contexto escolar

A atenção face dada à problemática da perda auditiva induzida pelo ruído nos profissionais da música tem sido enfatizada estudos nos últimos anos. No entanto, no que respeita aos alunos de música, são ainda poucos os estudos que analisam esta problemática de modo a permitir compreender se estes poderão estar expostos a elevados níveis de ruído no decorrer da sua formação e desenvolver problemas auditivos. O presente estudo pretende caraterizar os níveis de pressão sonora a que alunos de música estão expostos no decorrer das aulas e analisar a perceção do risco dos mesmos e potenciais efeitos sobre o sistema auditivo. Foram analisadas duas Orquestras de Jazz e uma Orquestra Sinfónica de uma Escola Superior de Música (ESM) e de um Conservatório de Música (CM). No total foram selecionados 24 alunos de acordo com o seu instrumento, e medidos os níveis de pressão sonora em diversas aulas, ao longo de duas semanas com recurso a 8 dosímetros. Foi aplicado um questionário para a análise da perceção dos alunos ao ruído e realizados exames audiométricos para a avaliação auditiva dos alunos. Em geral, os resultados demostraram que os alunos estão expostos a níveis elevados de ruído no decurso das aulas de instrumento e ensaios. Foram obtidos elevados níveis de Lp,A,eqT na bateria, vibrafone, saxofone, trombone, clarinete e trompa. Nas três escolas, verificou-se valores mais baixos de exposição no contrabaixo, nomeadamente nas Aulas Individuais. Os valores de Lp,Cpico ultrapassaram o valor de ação inferior de 135 dB(C) na percussão e saxofone. Nas aulas teóricas os valores obtidos ultrapassaram recomendação de 35 dB(A). No que respeita à perceção dos alunos verificou-se que em geral consideram que a exposição a elevados níveis de pressão sonora não tem efeitos significativos na saúde. Apesar de se ter verificado que todos os alunos avaliados apresentam uma audição normal, tinnitus, hiperacusia, distorção e diplacusia foram identificados por um número significativo de alunos. Os resultados obtidos neste estudo refletem a necessidade de implementação de medidas de prevenção e controlo dos níveis de exposição dos alunos de música com vista a um aumento da sua consciencialização do risco.

Re-use assessment of thermoset composite wastes as aggregate and filler replacement for concrete-polymer composite materials: a case study regarding GFRP pultrusion wastes

Glass fibre-reinforced plastics (GFRP), nowadays commonly used in the construction, transportation and automobile sectors, have been considered inherently difficult to recycle due to both the cross-linked nature of thermoset resins, which cannot be remoulded, and the complex composition of the composite itself, which includes glass fibres, polymer matrix and different types of inorganic fillers. Hence, to date, most of the thermoset based GFRP waste is being incinerated or landfilled leading to negative environmental impacts and additional costs to producers and suppliers. With an increasing awareness of environmental matters and the subsequent desire to save resources, recycling would convert an expensive waste disposal into a profitable reusable material. In this study, the effect of the incorporation of mechanically recycled GFRP pultrusion wastes on flexural and compressive behaviour of polyester polymer mortars (PM) was assessed. For this purpose, different contents of GFRP recyclates (0%, 4%, 8% and 12%, w/w), with distinct size grades (coarse fibrous mixture and fine powdered mixture), were incorporated into polyester PM as sand aggregates and filler replacements. The effect of the incorporation of a silane coupling agent was also assessed. Experimental results revealed that GFRP waste filled polymer mortars show improved mechanical behaviour over unmodified polyester based mortars, thus indicating the feasibility of GFRP waste reuse as raw material in concrete-polymer composites.

Sustainable waste recycling solution for the glass fibre reinforced polymer composite materials industry

In this paper the adequacy and the benefit of incorporating glass fibre reinforced polymer (GFRP) waste materials into polyester based mortars, as sand aggregates and filler replacements, are assessed. Different weight contents of mechanically recycled GFRP wastes with two particle size grades are included in the formulation of new materials. In all formulations, a polyester resin matrix was modified with a silane coupling agent in order to improve binder-aggregates interfaces. The added value of the recycling solution was assessed by means of both flexural and compressive strengths of GFRP admixed mortars with regard to those of the unmodified polymer mortars. Planning of experiments and data treatment were performed by means of full factorial design and through appropriate statistical tools based on analyses of variance (ANOVA). Results show that the partial replacement of sand aggregates by either type of GFRP recyclates improves the mechanical performance of resultant polymer mortars. In the case of trial formulations modified with the coarser waste mix, the best results are achieved with 8% waste weight content, while for fine waste based polymer mortars, 4% in weight of waste content leads to the higher increases on mechanical strengths. This study clearly identifies a promising waste management solution for GFRP waste materials by developing a cost-effective end-use application for the recyclates, thus contributing to a more sustainable fibre-reinforced polymer composites industry.

VISIR deployment in undergraduate engineering practices

Practical sessions are the backbone of qualification in engineering education. It leads to a better understanding and allows mastering scientific concepts and theories. The lack of the availability of practical sessions at many universities and institutions owing to the cost and the unavailability of instructors the most of the time caused a significant decline in experimentation in engineering education over the last decades. Recently, with the progress of computer-based learning, remote laboratories have been proven to be the best alternative to the traditional ones, regarding to its low cost and ubiquity. Some universities have already started to deploy remote labs in their practical sessions. This contribution compiles diverse experiences based on the deployment of the remote laboratory, Virtual Instrument Systems in Reality (VISIR), on the practices of undergraduate engineering grades at various universities within the VISIR community. It aims to show the impact of its usage on engineering education concerning the assessments of students and teachers as well.

Learning management systems in higher education

The use of Laptops and the Internet has produced the technological conditions for instructors and students can take advantage from the diversity of online information, communication, collaboration and sharing with others. The integration of Internet services in the teaching practices can be responsible for thematic, social and digital improvement for the agents involved. There are many benefits when we use a Learning Management Systems (LMS) such as Moodle, to support the lectures in higher education. We also will consider its implications for student support and online interaction, leading educational agents to a collaborating of different learning environments, where they can combine face-to-face instruction with computer-mediated instruction, blended-learning, and increases the possibilities for better quality and quantity of human communication in a learning background. In general components of learning management systems contain synchronous and asynchronous communication tools, management features, and assessment utilities. These assessment utilities allow lecturers to systematize basic assessment tasks. Assessments can be straightaway delivered to the student, and upon conclusion, immediately returned with grades and detailed feedback. Therefore learning management systems can also be used for assessment purposes in Higher Education.

PLSR Models for Mechanical Strengths of Concrete Composite Materials Reinforced with Pultrusion Wastes

In this paper, we present two Partial Least Squares Regression (PLSR) models for compressive and flexural strength responses of a concrete composite material reinforced with pultrusion wastes. The main objective is to characterize this cost-effective waste management solution for glass fiber reinforced polymer (GFRP) pultrusion wastes and end-of-life products that will lead, thereby, to a more sustainable composite materials industry. The experiments took into account formulations with the incorporation of three different weight contents of GFRP waste materials into polyester based mortars, as sand aggregate and filler replacements, two waste particle size grades and the incorporation of silane adhesion promoter into the polyester resin matrix in order to improve binder aggregates interfaces. The regression models were achieved for these data and two latent variables were identified as suitable, with a 95% confidence level. This technological option, for improving the quality of GFRP filled polymer mortars, is viable thus opening a door to selective recycling of GFRP waste and its use in the production of concrete-polymer based products. However, further and complementary studies will be necessary to confirm the technical and economic viability of the process.

A multiplicação e a divisão de números naturais: uma análise de manuais escolares de 1.º ciclo

Dissertação apresentada à Escola Superior de Educação de Lisboa para obtenção de grau de mestre em Educação Matemática na Educação Pré-escolar e nos 1.º e 2.º ciclos do Ensino Básico