Ciências de informação geográfica no apoio à decisão.

"A utilização de informação geográfica na tomada de decisão é já bastante usual. As decisões relacionadas com o posicionamento ou localização de estruturas e pessoas no espaço beneficiam com a observação da relação espacial entre os objectos. Os investimentos efectuados nos últimos anos com a aquisição de Sistemas de Informação Geográfica (SIG) e integração de bases de dados de acesso partilhado, visam a optimização e coerência das decisões e a avaliação de riscos. [...]"

Numerical simulation of the MYRRHA reactor design v1.6

This study is embodied in the project of MYRRHA reactor, developed by the Belgian Nuclear Research Center (SCK-CEN), to which VKI is giving its contribution. This dissertation aims to perform a numerical simulation of the MYRRHA reactor design version 1.6 and analyse its results. It is important to point out that part of the information sources are confidential. The heavy metal considered is LBE (Lead Bismuth Eutectic). This reactor has originally a complex geometry, which was simplified for simulation purposes. The investigation is made through a single-phase flow CFD model in nominal conditions of the primary coolant circuit. Its objective is to provide a description of the flow and temperature fields of the entire pool loop while analysing the flow patterns that develop in the lower and the upper plenum of the MYRRHA v1.6 facility as complete as possible, while using a steady-state model. The model was prepared in the OpenFOAM software, due to its open source nature. Firstly the numerical set up is made, then the porous media is defined and finally the thermal modelling takes place. [...]Este estudo está inserido no âmbito do projecto do reactor MYRRHA, desenvolvido pelo Centro de Investigação Nuclear Belga (SCK-CEN), ao qual o VKI está a dar a sua contribuição. Esta dissertação tem como objectivo realizar uma simulação numérica da versão 1.6 do reactor MYRRHA e analisar os seus resultados. É importante notar que parte das fontes de informação são confidenciais. O metal líquido pesado considerado é o LBE (Lead Bismuth Eutectic). Este reactor tem originalmente uma geometria complexa, que foi simplificada para fins de simulações. O estudo é feito através de um modelo monofásico de Dinâmica de Fluidos Computacional em condições nominais do circuito do líquido de refrigeração primário. Tem como objectivo fornecer uma descrição do fluxo e dos campos de temperatura do ciclo inteiro, enquanto os padrões do fluxo desenvolvidos na parte superior e inferior do MYRRHA v1.6 são analisados da forma mais completa possível, usando um modelo de regime permanente. O modelo foi preparado com recurso ao software OpenFOAM, dada a sua natureza de software aberto. Primeiro, as condições numéricas são estipuladas, depois os meios porosos são definidos, e finalmente é feita a modelação térmica. [...

Collocations in Portuguese: A corpus-based approach to lexical patterns

Collocations and, more generally, multiword expressions, have been extensively studied for the English language and a large set of resources are available in terms of linguistic description and tools for language learning. On the contrary, combinatorial resources for Portuguese are scarce, although specific types of collocations, such as light verb constructions, nominal compounds and proverbs, have been the topic of many studies. This chapter reviews different theoretical perspectives on multiword expressions and collocations in Portuguese and presents in more detail the results of the COMBINA-PT project, a corpus-based approach to the study of collocations.info:eu-repo/semantics/publishedVersio

Tendências e diferenças na mortalidade da população idosa em Portugal: uma abordagem sub-nacional

Existem indícios de que a população portuguesa está a envelhecer de forma desigual nas várias regiões do país. A partir dos dados disponíveis no Eurostat, estudámos as tendências de mortalidade e variações associadas no período de 1994 a 2006, entre a população idosa portuguesa, por sexo, grupo etário e por causa de morte, procurando estabelecer diferenças regionais. Estas ocorrem apenas, pontualmente, por sexo, mas, sobretudo, entre o grupo etário dos 65 aos 69 anos e o dos 85 ou mais anos, no que se refere às principais causas de morte. Das seis causas seleccionadas, três são dominantes entre a população idosa: doenças do sistema circulatório, neoplasias e doenças do sistema respiratório. Para além destas considerámos também as doenças endócrinas, as doenças do sistema digestivo e as causas indefinidas. Em termos de variação, os óbitos por doenças endócrinas sofreram, no período em análise, aumentos acentuados em todo o país, enquanto os relativos às doenças do sistema circulatório diminuíram. Globalmente, a região Centro apresentava as maiores diferenças, no que se refere ao afastamento entre as duas principais causas de morte e as restantes. Por sua vez, os Açores e a Madeira apresentavam, em certos aspectos, padrões, quer de tendência das taxas brutas de mortalidade, quer da sua variação, por sexo, grupo etário e causa, diferentes dos observáveis nas regiões do Continente, não podendo, no entanto, considerarem-­se regiões homogéneas entre si. Este trabalho ilustra as diferenças regionais entre as causas de morte dominantes entre  a população idosa portuguesa

Screening postcolonial Intellectuals: cinematic engagements and postcolonial activism

This special issue proposes new ways of seeing and thinking about postcolonial intellectuals through the frame of transnational screens. For this purpose, the issue develops around the twofold notion of the intellectual as a filmmaker and the intellectual as an object of filmmaking. In particular, it focuses on the ways in which this interrelationship expands notions of postcolonial theory and practice regarding the aesthetic and political intervention of intellectuals in transnational screen culture. Many postcolonial figures have been influential not only in rethinking the ways in which representation should be conceived and theorized but also in inspiring new forms of visuality and aesthetics through their life and work. These figures include Frantz Fanon, Assia Djebar, and Stuart Hall, and others explored in this issue, such as Toni Morrison, Raoul Peck, Ai Weiwei, and Steve McQueen. The special issue also includes exclusive interviews with Ai Weiwei and Trinh T. Minh-ha, artists, intellectuals, activists, and filmmakers whose engagement with postcolonial debates, and more broadly with the politics and aesthetics of filmmaking, have contributed to a reshaping of contemporary postcolonial realities and discourses, in scholarship and the public sphere.info:eu-repo/semantics/publishedVersio

Felicidade no Trabalho: estudo em duas entidades do Setor Público

A felicidade tem emergido como problemática em diversos campos científicos, e em particular no domínio da gestão de recursos humanos, associada ao conceito de bem-estar no trabalho. Procurámos nesta investigação conhecer as perceções dos trabalhadores de duas entidades do setor público, a partir de um instrumento - Happiness at work - que avalia oito dimensões: ambiente interno, reconhecimento e confiança, desenvolvimento pessoal, remuneração, gostar do que faço, sustentabilidade e inovação, envolvimento com as chefias e a organização e, por fim, o equilíbrio entre trabalho e vida pessoal. Trata-se de um estudo quantitativo, de natureza descritivo-correlacional, onde foram inquiridos 293 colaboradores. Encontraram-se graus diferenciados de satisfação dos trabalhadores do Agrupamento e da Autarquia, tendo em conta a diferença de ambas as instituições. Previram-se e confirmaram-se piores resultados, e logo maiores índices de stresse, frustração e menos satisfação, nos profissionais do Agrupamento de Escolas. Isto porque quer a intensidade, quer as condições de trabalho e a degradação das condições laborais foi mais acentuada no domínio da educação. Um dos fatores que se revelou mais importante foi relativo às boas relações com as chefias, podendo estas contribuir para o nível global de satisfação, compensando a menor satisfação com as remunerações. / Happiness has emerged as an issue in many scientific fields, particularly in the field of human resources management, linked to the concept of well-being at work. We sought in this investigation to know the perceptions of the two public sector entities workers. We’ve used an instrument - Happiness at work - that measures eight dimensions: internal environment, trust and confidence, personal development, compensation, enjoying the job, sustainability and innovation, involvement in the leadership and organization and, finally, work-personal life balance. It is a quantitative study, of descriptive and correlational nature, where 293 employees were surveyed. We’ve found different degrees of satisfaction between municipality and school workers, taking into account the difference of both institutions. The group of school professionals presented worse outcomes, with higher levels of stress, frustration and less satisfaction. This is because either the intensity and the degradation of working conditions was more pronounced in the field of education. One of the factors that proved most important was the good relationships with managers, these may contribute to the overall level of satisfaction, offsetting the lower satisfaction with salaries

Crescer nas sombras do suicídio

Introduction: Children/adolescents mourning the death of a primary caregiver face several challenges, including bond breaking and family restructuring due to loss. The negative connotation associated with suicide loss is enhanced by stigma, increasing acceptance difficulties and feelings of isolation, abandonment, shame, and guilt in face of what happened. Objective: The aim of this study was to retrieve data on childhood bereavement due to primary caregiver suicide and explore psychopathological and psycho-affective developmental consequences of this type of grief. Methods: Literature review of articles published on PubMed database about the subject. Results and Discussion: Bereavement of a suicidal parent is associated with multiple psychopathological conditions: mood disorders, post-traumatic stress disorder, substance abuse, self-injurious behavior, suicidal behavior. Suicide and depressive disorder risk is higher when parental death occurred early in life course, with maternal suicide having greater impact. Antidepressants are more commonly used in cases of early parental death from suicide and are associated with increased hospitalizations for Major Depression and Bipolar Affective Disorder in adulthood. Consequences of parental death by suicide may be explained by several factors, as genetics, biological reactions, psychological factors originated from loss of an attachment figure, or social and environmental changes. Conclusions: Parental suicide can be impactful for children’s developmental trajectory and later functioning level. The authors alert to the need for prevention and early intervention strategies associated with this process.info:eu-repo/semantics/publishedVersio

Proposal for Multi-word Expression annotation in running text

We present a proposal for the annotation of multi-word expressions in a 1M corpus of contemporary portuguese. Our aim is to create a resource that allows us to study multi-word expressions (MWEs) in their context. The corpus will be a valuable additional resource next to the already existing MWE lexicon that was based on a much larger corpus of 50M words. In this paper we discuss the problematic cases for annotation and proposed solutions, focusing on the variational properties of MWEs.info:eu-repo/semantics/publishedVersio

Cultured bone on biomaterial substrates : a tissue engineering approach to treat bone defects

In the present thesis, a tissue engineering approach to treat bone defects was investigated. Such strategy was based on the use of patient own cultured bone marrow stromal cells (BMSCs) in association with biomaterials to produce autologous living bone equivalents. When engineering such implants, three main factors had to be taken into account: (i) the cells, (ii) the culture technology and (iii) the biomaterial scaffolds. The capacity of BMSCs to proliferate, differentiate along the osteogenic lineage and form a bone like tissue was demonstrated in various in vitro assays making use of biochemical,\ud immunological, microscopic and gene expression techniques. The ability of the cells to produce bone in vivo was established using an ectopic (extra osseous) implantation model.\ud Results indicated that BMSC cultures were composed of a heterogeneous population\ud containing a subpopulation of cells with high proliferative capacity and with potential to differentiate into bone forming cells. Both the growth and the differentiation pattern of these cells could be manipulated, to a certain degree, through the use of bioactive factors during culture. After implantation, the bone forming capacity of the cultures proved to be related to the amount of early osteoprogenitors and precursors cells that could be induced into starting the osteogenic differentiation process. In bone marrow aspirates, this subpopulation appeared to decrease with donor age and to be strongly dependent on the donor, indicating that the aspiration procedure plays an important role in the obtained bone marrow cell population. In order to evaluate the in vivo bone formation capacity of BMSC cultures prior to implantation, an experimental method was developed in which the amount of early\ud osteoprogenitors and precursors cells could be quantified. With regard to the technology design, data indicated that the culture of cells on the biomaterial scaffolds prior to implantation resulted in implants with faster in vivo bone\ud forming ability as compared to scaffolds implanted after cell seeding. In addition, two biodegradable polymeric systems were proposed as scaffolds to be used in the described bone engineering approach after evaluating their ability to support bone marrow cell growth, differentiation and in vivo bone formation.\ud In summary, although the complete knowledge of the factors controlling BMSC rowth and osteogenic differentiation still needs to be further expanded, the obtained results suggest\ud that the bone tissue engineering approach described in this thesis presents a great potential\ud for the repair of bone defects and will become an advantageous alternative to the traditional\ud autologous bone grafting

Fluorite mineralization related to the dolomitization: an equilibrium study of the Proterozoic stratabound carbonate Macaia-Ijaci Basin, Lavras, Minas Gerais, Brazil

Stratabound fluorite occurring as thin films in the concomitantly derived dolomitic portions of the calcitic limestone of the Proterozoic Carandaí Formation in the Macaia-Ijaci Basin was supposedly formed by metasomatic reactions between the carbonate and HF- and Mg2+- rich brines, during metamorphism. Thirteen electron microprobe analyses from the carbonate in a single petrographic thin section, allowed the determination of the temperature of the carbonate formation in the range 180º-230ºC, using the Mg-calcite solvus geothermometer. Five key mineral reactions in the system Mg-Ca-C-H-O-F plotted in diagrams in terms of either, CO2- and HF-fugacities or chemical potentials of CO2 and HF yielding fluorite + dolomite from calcite + Mg2+, are proposed. Apparently the fluorite formation is related with dolomitization. Additional reaction involving fluorite was calculated and inserted in the phase diagram, according to the existence of calcite-fluorite veinlets bordered by dolomite selvages, at the Casa de Pedra quarry.Fluorita estratiforme ocorrendo como delgados filmes nas concomitantemente derivadas porções dolomíticas do calcário calcítico da Formação Carandaí do Proterozóico, na Bacia Macaia-Ijaci foi su-postamente formada por reações metassomáticas entre o carbonato e salmouras ricas em HF e Mg2+, durante o metamorfismo. Treze análises de micro-sonda eletrônica dos carbonatos em uma única lâmina petrográfica delgada , permitiram a determinação da temperatura de formação dos carbonatos na faixa 180º-230ºC, utilizando o geotermômetro Mg-calcita/solvus. Cinco reações-chave no sistema Mg-Ca-C-H-O-F lançadas em diagramas em termos de fugacidades ou potenciais químicos de CO2 e HF produzindo fluorita+dolomita a partir de calcita+Mg2+ são propostas. Aparentemente a formação de fluorita é relacionada à dolomitização. Reação adicional envolvendo fluorita foi calculada e inserida no diagrama de fases, de acordo com a existência de venulações de fluorita-calcita bordejados por dolomita na pedreira de Casa de Pedra