O Podcast : ferramenta digital em contexto educativo no 1ºCEB

A utilização das TIC tem vindo a aumentar significativamente na atual «Sociedade de Informação», o que veio proporcionar avanços tecnológicos e transformações que influenciaram amplamente a educação a todos os níveis. Por essa razão torna-se fundamental a integração das TIC nas escolas e a inclusão de recursos tecnológicos digitais no processo de ensino e de aprendizagem. A investigação realizada pretendeu recolher e enumerar quais as potencialidades da utilização em contexto educativo do Podcast no 1ºCEB. A metodologia adotada pressupôs uma investigação de caráter qualitativo, na qual se privilegiou uma investigação-ação. Os resultados da investigação vieram demonstrar que a utilização do Podcast veio promover e incrementar os níveis de motivação dos alunos, tornando-se uma forma eficaz de aproximar os alunos dos objetivos didático-pedagógicos e de superação a nível espácio-temporal. O Podcast foi utilizado, para além do espaço formal da sala de aula, em espaços não formais, permitindo aos alunos recorrerem a esta ferramenta digital sempre que necessário, onde o apoio dos pais/encarregados de educação se concretizou. É ainda de realçar o facto de na literatura ainda serem escassas e pouco generalizadas utilizações do Podcast no âmbito do 1º CEB, apesar de já existirem algumas utilizações, a investigação pode-se considerar ser ainda pioneira no contexto educativo portuguêsThe use of ICT has increased significantly in the current “Information Society”, which has provided technological advances and changes that widely influenced education at all levels. By es-sa reason it is fundamental to the integration of ICT in schools and the inclusion of digital technology resources in the teaching process and learning. The research aimed to collect and list what potentialities-ties of use in educational Podcast context in 1st CEB. The methodology assumed a qualitative research, which favored an investigation--action. Research results have shown that the use of the Podcast came promote and increase students’ motivation levels, making it an effective way to bring students of didactic and pedagogical objectives and overcoming the spatial-temporal level. Podcast was used in addition to the formal space of the classroom, in non-formal spaces, allowing students to make use of this digital tool where necessary, where the support of parents / guardians to materialize. It is also worth noting the fact that in the literature are still scarce and widespread uses of the podcast as part of the 1st CEB, although there are already some uses, the investigation can be considered to be even pioneered the Portuguese educational context.info:eu-repo/semantics/publishedVersio

Orbispaces

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2005.Includes bibliographical references (p. 127-130).In this thesis, I introduce a new definition for orbispaces based a notion of stratified fibration and prove it's equivalence with other existing definitions. I study the notion of orbispace structures on a given stratified space. I then set up two parallel theories of stratified fibrations, one for topological spaces, and one for simplicial sets. Modulo a technical comparison between the two theories, I construct a classifying space for orbispace structures. Using a conjectural obstruction theory, I then prove that every compact orbispace is equivalent to the quotient of a compact space by the action of a compact Lie group.by André Gil Henriques.Ph.D

Resistência à intempérie de filmes obtidos por polimerização por plasma aplicados em aço pré-pintado

Doutoramento em Ciência e Engenharia de MateriaisO trabalho apresentado teve origem no projecto de investigação “Tailored Thin Plasma Polymers Films for Surface Engineering of Coil Coated Steel”, financiado pelo Programa Europeu ECSC Steel Research. Sistemas de aço galvanizado pré-pintado em banda à base de poliéster e poliuretano foram submetidos a um processo de polimerização por plasma onde um filme fino foi depositado de modo a modificar as propriedades de superfície. Foram usados reactores de cátodo oco, microondas e rádio frequência para a deposição do polímero fino. Os sistemas preparados foram analisados de modo a verificar a influência do processo de polimerização por plasma na alteração das propriedades barreira dos sistemas pré-pintados em banda. Foi estudado o efeito dos diferentes passos do processo de polimerização por plasma, bem como o efeito de diferentes variáveis operatórias. A mistura precursora foi variada de modo a modificar as propriedades da superfície de modo a poder vir a obter maior hidrofobicidade, maior resistência a marcas digitais, bem como maior facilidade de limpeza. Os testes foram conduzidos em solução de NaCl 0,5 M. Para o trabalho foram usadas técnicas de análise da morfologia da superfície como Microscopia de Força Atómica e Microscopia Electrónica de Varrimento. As propriedades electroquímicas dos sistemas foram estudadas por Espectroscopia de Impedância Electroquímica. A estrutura dos filmes gerados no processo de polimerização por plasma foi caracterizada por Microscopia de Transmissão Electrónica. A modificação das propriedades ópticas devido ao processo de polimerização por plasma foi também obtida.The present work was originated in the project “Tailored Thin Plasma Polymers Films for Surface Engineering of Coil Coated Steel”, financed by the European Program ECSC Steel Research. Polyurethane and polyester coil coatings modified with plasma polymer films prepared by hollow cathode, microwave and radio frequency plasma reactors were tested in order to obtain information about the influence of the process on the barrier properties of the coated systems and stability of the films obtained. The effects of the different steps on the whole process as well as the effect of different operating parameters were analysed. Different plasma precursors that could provide tailored surface properties, e.g. ultra-hydrophobic surface, antifinger print and enhanced cleaning properties were also tested. The experiments were performed in 0.5 M NaCl solution. The coating surface evolution was studied by means of Scanning Electronic Microscopy and Atomic Force Microscopy. Electrochemical Impedance Spectroscopy was used to study the electrochemical properties of the coating systems. Results obtained by Transmission Electronic Microscopy revealed the microstructure of the plasma polymer films applied on the top of the coil coatings. Surface optical properties modification with plasma polymerization was also investigated.FCT; FSE - SFRH/BD/21541/200

Modelação longitudinal da satisfação laboral em Portugal

O presente trabalho prop~oe a modelação longitudinal da satisfação laboral comparando três abordagens estatísticas: (1) modelos Multi-Processos com Efeitos Cruzados e Desfasados, (2) modelos de Equações Estruturais com Efeitos Cruzados e Desfasados e (3) modelos com Trajectória Latente. São usados dados do European Community Household Panel (ECHP) relativos a Portugal e aos anos 1994 - 2001. A satisfação laboral é modelada segundo um estrutura bifactorial, onde se consideram as dimensões de satisfação com os factores extrínsecos (aspectos materiais do trabalho) e com os factores intrínsecos (aspectos qualitativos do trabalho). São ainda considerados alguns possíveis determi-nantes da satisfaçãolaboral, designadamente a percepção do estado de saúde, o nível de habilitações e o sector de actividade. As três abordagens metodológicas permitem aferir sobre quest~oes pertinentes em relação à modelação longitudinal da satisfaçãolaboral. A modelação da satisfação laboral com recurso a modelos com variáveis observadas versus modelos com variáveis latentes permite discutir questões relacionadas com a inclusão da componente erro de medida no processo de estimação. A estimação de modelos com quatro e com oito momentos temporais permite estudar o efeito da modelação com um horizonte temporal mais amplo. São ainda consideradas as características do desenho amostral complexo para efeitos de estimação dos modelos. Por último comparam-se modelos de equa»c~oes estruturais clássicos e mode-los com trajectória latente para modelar a satisfação laboral ao longo do tempo. Todos os modelos apresentados são estimados utilizando o software estatístico Mplus, sendo alguns modelos também estimados com recurso ao LISREL.The current work proposes modeling longitudinal job satisfaction comparing three statis-tics approaches: (1) Cross-Lagged Multi-Process Models, (2) Cross-Lagged Structural Equation Models and (3) Latent Growth Curve Models. Data from the European Com-munity Household Panel of Portugal, from 1994 to 2001, are used. Job satisfaction is modeled following a two-factor structure: satisfaction with the extrinsic factors (mate-rial aspects of the work) and satisfaction with the intrinsic factors (qualitative aspects of work). Signi¯cant determinants of job satisfaction include perceived health status, education and job in the private or in the public sector. The three methodological approaches allow to capture di®erences on relevant issues of lon-gitudinal job satisfaction. The modeling of job satisfaction using models with observed variables versus models with latent variables allows to discuss issues related to including the measurement error component in the estimation procedure. The estimation of models with four and eight waves allows to study the e®ect of modeling with more time points. The characteristics of the complex survey design are taken into account in the estimation procedure. Finally, classical structural equation models and latent growth curve models are compared as methodologies for modelling job satisfaction over time. All models pre-sented are estimated using Mplus, and some models are also estimated in LISREL

Musicoterapia no Centro Multidisciplinar Dor do Hospital Garcia de Orta

Relatório de estágio realizado no âmbito do mestrado em Musicoterapia, Universidade Lusíada de Lisboa, 2019Exame público realizado em 24 de Abril de 2020O presente documento reporta um estágio em musicoterapia no Centro Multidisciplinar Dor do Hospital Garcia de Orta, no âmbito do mestrado em musicoterapia da Universidade Lusíada de Lisboa. O tratamento da dor crónica é realizado por uma equipa multidisciplinar especializada e contempla a individualidade e subjetividade de quem a sofre. A musicoterapia teve por objetivo promover a gestão da dor e a qualidade de vida na pessoa que padece de dor crónica. O estágio foi levado a cabo com dezasseis participantes, decorrendo ao longo de onze meses. Viabilizaram-se sessões individuais e de grupo terapêutico, realizadas em contexto de prática clínica tutelada e supervisionada. Foram elaborados dois estudos de caso representativos do trabalhado realizado, que corroboram os benefícios da musicoterapia no tratamento da dor crónica.This document reports an internship in music therapy at the Multidisciplinary Pain Centre of the Garcia de Orta Hospital, within the framework of the master's degree in music therapy from the Universidade Lusíada de Lisboa. The chronic pain treatment is implemented by a specialized multidisciplinary team and includes the person’s individuality and subjectivity. Music therapy aimed to promote the pain management and the quality of life for the people suffering from chronic pain. The internship was carried out with sixteen participants, taking place over eleven months. Individual and therapeutic group sessions were feasible, in a taught and supervised clinical practice. The work developed is depicted in two undertook case studies, supporting the music therapy benefits in chronic pain treatment

Recovering the Graph Underlying Networked Dynamical Systems under Partial Observability: A Deep Learning Approach

We study the problem of graph structure identification, i.e., of recovering the graph of dependencies among time series. We model these time series data as components of the state of linear stochastic networked dynamical systems. We assume partial observability, where the state evolution of only a subset of nodes comprising the network is observed. We devise a new feature vector computed from the observed time series and prove that these features are linearly separable, i.e., there exists a hyperplane that separates the cluster of features associated with connected pairs of nodes from those associated with disconnected pairs. This renders the features amenable to train a variety of classifiers to perform causal inference. In particular, we use these features to train Convolutional Neural Networks (CNNs). The resulting causal inference mechanism outperforms state-of-the-art counterparts w.r.t. sample-complexity. The trained CNNs generalize well over structurally distinct networks (dense or sparse) and noise-level profiles. Remarkably, they also generalize well to real-world networks while trained over a synthetic network (realization of a random graph). Finally, the proposed method consistently reconstructs the graph in a pairwise manner, that is, by deciding if an edge or arrow is present or absent in each pair of nodes, from the corresponding time series of each pair. This fits the framework of large-scale systems, where observation or processing of all nodes in the network is prohibitive.Comment: Accepted at The 37th AAAI Conference on Artificial Intelligence (main track

High affinity of 3D spongin scaffold towards Hg(II) in real waters

This study focuses on the ability of commercial natural bath sponges, which are made from the skeletons of marine sponges, to sorb Hg from natural waters. The main component of these bath sponges is spongin, which is a protein-based material, closely related to collagen, offering a plenitude of reactive sites from the great variety of amino acids in the protein chains, where the Hg ions can sorb. For a dose of 40 mg L-1 and initial concentration of 50 μg L-1 of Hg(II), marine spongin (MS) removed ~90% of Hg from 3 water matrixes (ultrapure, bottled, and seawater), corresponding to a residual concentration of ~5 μg L-1, which tends to the recommend value for drinking water of 1 μg L-1. This value was maintained even by increasing the MS dosage, suggesting the existence of a gradient concentration threshold below which the Hg sorption mechanism halts. Kinetic modelling showed that the Pseudo Second-Order equation was the best fit for all the water matrixes, which indicates that the sorption mechanism relies most probably on chemical interactions between the functional groups of spongin and the Hg ions. This material can also be regenerated in HNO3 and reused for Hg sorption, with marginal losses in efficiency, at least for 3 consecutive cycles.publishe

Green graphene-chitosan sorbent materials for mercury water remediation

The development of new graphene-based nanocomposites able to provide synergistic effects for the adsorption of toxic heavy metals in realistic conditions (environment) is of higher demand for future applications. This work explores the preparation of a green nanocomposite based on the self-assembly of graphene oxide (GO) with chitosan (CH) for the remediation of Hg(II) in different water matrices, including ultrapure and natural waters (tap water, river water, and seawater). Starting at a concentration of 50 μg L-1, the results showed that GO-CH nanocomposite has an excellent adsorption capacity of Hg (II) using very small doses (10 mg L-1) in ultrapure water with a removal percentage (% R) of 97 % R after only two hours of contact time. In the case of tap water, the % R was 81.4% after four hours of contact time. In the case of river and seawater, the GO-CH nanocomposite showed a limited performance due the high complexity of the water matrices, leading to a residual removal of Hg(II). The obtained removal of Hg(II) at equilibrium in river and seawater for GO-CH was 13% R and 7% R, respectively. Our studies conducted with different mimicked sea waters revealed that the removal of mercury is not affected by the presence of NO3- and Na+ (>90% R of Hg(II)); however, in the presence of Cl-, the mercury removal was virtually nonexistent (1% R of Hg(II)), most likely because of the formation of very stable chloro-complexes of Hg(II) with less affinity towards GO-CH.publishe