O livro no jardim-de-infância : um olhar sobre a obra de Luísa Ducla Soares

A literatura para a infância tem sido objecto de discussão, especialmente notocante ao seu estatuto no universo literário, sobretudo a partir dos anos 70 doséculo XX, vindo, assim, a desenvolver-se e a assumir uma crescente importância. Decorrente da evolução do conceito de criança, a literatura para ainfância foi assumindo um lugar proeminente na sua formação,nomeadamente, em idade pré-escolar. A seguir à família, o educador de infância afigura-se como outro dos principais mediadores no encontro dacriança com o livro, tendo, desde aí, uma função influente face à promoção dogosto pela leitura. No entanto, este profissional sente a necessidade de, desdea sua formação inicial, sever dotado de conhecimentos básicos que lhe permitam práticas mais ajustadas e que salvaguardem as necessidades einteresses de leitura das crianças. A presente dissertação tem como principal finalidade aferir a importânciaatribuída à literatura para a infância, com especial destaque na obra de Luísa Ducla Soares, em contexto de jardim-de-infância. Apesar do lugar incontestável desta autora e da sua obra no cânone daliteratura portuguesa para a infância, a crítica literária de que tem sido alvo é ainda exígua. Por essa razão também, procurámos, através de uma análisedas especificidades da sua escrita, da diversidade das temáticas inerentes àssuas histórias e da qualidade estética e literária das suas publicações, reflectirsobre as potencialidades das obras que nos apresenta a referida escritora, pelas quais tem merecido vários prémios e nomeações. ABSTRACT: Literature for early years has been subject of quarrel, especially regarding to itsstatute in the literature universe, mostly since the 70’s of the 20th century, andconsequently came to grow and to assume an increasing importance. As aresult of the evolution of the child concept, literature for early years wasassuming a prominent position in children education, specifically, in preschoolage. After family, the kindergarten teacher figures hisself/herself as another of themain intermediaries in introducingchild to books, having, since then, an influential role endorsing reading’s taste on children. However, this practitionerneeds, since his/her formative years, to be endowed with basic knowledge thatallows him/her more adjusted practices that look after reading’s necessities and interests of children’s interests. The present dissertation’s main purpose is to survey which importance hasliterature for infants, with a special focus on the work of Luísa Ducla Soares, inearly childhood education. Even though her books are unquestionable at ruling literature for infants inPortugal, there hasn’t been that much literary analysis about it. Therefore, welooked, through the particulars aspects of her writing, the diversity of themesthat are inherent to her stories and the artistic and literary value of her publications, to proof the quality of the work presented by the mentioned writer,on behalf of which the author has justified several awards and nominations.

Development of high-resolution gamma cameras based on silicon photosensors

The development of a compact gamma camera with high spatial resolution is of great interest in Nuclear Medicine as a means to increase the sensitivity of scintigraphy exams and thus allow the early detection of small tumours. Following the introduction of the wavelength-shifting fibre (WSF) gamma camera by Soares et al. and evolution of photodiodes into highly sensitive silicon photomultipliers (SiPMs), this thesis explores the development of a WSF gamma camera using SiPMs to obtain the position information of scintillation events in a continuous CsI(Na) crystal. The design is highly flexible, allowing the coverage of different areas and the development of compact cameras, with very small dead areas at the edges. After initial studies which confirmed the feasibility of applying SiPMs, a prototype with 5 5 cm2 was assembled and tested at room temperature, in an active field-of-view of 10 10 mm2. Calibration and characterisation of intrinsic properties of this prototype were done using 57Co, while extrinsic measurements were performed using a high-resolution parallel-hole collimator and 99mTc. In addition, a small mouse injected with a radiopharmaceutical was imaged with the developed prototype. Results confirm the great potential of SiPMs when applied in a WSF gamma camera, achieving spatial resolution performance superior to the traditional Anger camera. Furthermore, performance can be improved by an optimisation of experimental conditions, in order to minimise and control the undesirable effects of thermal noise and non-uniformity of response of multiple SiPMs. The development and partial characterisation of a larger SiPM WSF gamma camera with 10 10 cm2 for clinical application are also presented.

Análise energética a uma instalação produtiva de cerâmica de revestimento

O presente trabalho deriva do Projeto GALP 20–20-20 implementado na empresa Primus Vitória, em parceria com a Universidade de Aveiro. A empresa na qual foi efetuado o estágio produz azulejos para revestimento, estando situada na Zona Industrial de Taboeira. Este relatório expõe a caracterização energética da Primus Vitória, onde são apresentados consumos de energia elétrica e gás natural nos diversos sectores produtivos, relação entre consumos energéticos globais e a produção de azulejos e ainda os indicadores energéticos da mesma. Através deste estudo foi possível a criação de medidas de eficiência energética passíveis de implementação, aplicadas a equipamentos consumidores de energia elétrica, através da substituição do motor elétrico existente no setor da aspiração, e de gás natural, otimizando o funcionamento da plastificadora para sequencial, com o devido impacte no consumo final de energia. Como trabalho futuro propõe-se o desenvolvimento de um plano de monotorização de consumos energéticos com o intuito de obter um controle rigoroso dos mesmos reduzindo possíveis perdas e identificando possíveis defeitos no processo produtivo.

Recuperação de componentes de metal duro por projeção térmica

The main objective of this work is the development of a hardmetal components (WC-6%Co) recovery method by thermal deposition process. The thermal deposition technique used was HVOF (high velocity oxygen-fuel). The HVOF enables depositions of thick coatings (100-500 µm) with low porosity levels, high hardness and excellent adhesion. Before deposition, hardmetal samples with different geometries (plates and cylinders) were finished in order to have different roughness. The influence of these parameters in adhesion was studied. After this step, different re-sintering temperatures were used, in order to determine which one allows to obtain the maxima densification, elements distribution and metallurgical bonding. The re-sintering promotes the densification of the coating, with an increase of its hardness and metallurgical bonding formation. The inclusion of an intermetallic layer was tested along with different layer parameters. In liquid phase sintering (1383 and 1455 ºC) a complete densification of the coating occurred, while a bonding between the substrate and the coating only partially happened. The results of SEM/EDS show low levels of porosity and a complete and uniform distribution of the elements of the alloy. The cylindrical samples without intermetallic layer showed the lowest level of porosity and best metallurgical bonding. When the substrate surface was polished (Ra = 0.05 mm) lower levels of porosity and greater metallurgical bonding were found for both geometries. Taking into account the results obtained in this study, we can conclude that the implementation of this process is appropriate for cylindrical components with a polished surface. In these components the intermetallic layer is unnecessary and punctual defects like pores can be repaired with this process.