599 research outputs found

    Book review [Michel Cahen. “NĂŁo somos bandidos”. A vida diĂĄria de uma guerrilha de direita: a Renamo na Ă©poca do Acordo de Nkomati (1983–1985)]

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    Michel Cahen’s book Não Somos Bandidos deals with the National Resistance of Mozambique (Renamo), an armed group that fought the Mozambican Liberation Front (Frelimo) regime from 1972 to 1992, and its role today as the main opposition party. Cahen’s work deconstructs mainstream narratives that present a different story, vilifying Renamo as “armed banditry” and an illegitimate organization in the service of neocolonialism

    How Does Fiscal Policy React to Wealth Composition and Asset Prices?

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    We assess the response of fical policy to developments in asset markets in the US and the UK. We estimate fical polyce rules augmented with aggregate wealth, wealth composition (i.e. financial and housing wealth) and asset prices (i.e. stock and housing prices) using: (i) a linear framework based on a fully simultaneous system approach; and (ii) two nonlinear specifications that rely on a smooth transition regression (STR) and a Markov-switching (MS) model. The linear framework suggests that, while primary spending does not seem to react to wealth composition or asset prices, taxes and primary surplus are significantly: (i) cut when financial wealth or stock prices rise, and (ii) raised when housing wealth or housing prices increase. The smooth transition regression model shows that primary spending and fiscal balance are adjusted in a nonlinear fashion to both wealth and price effects, while the Markov-switching framework highlights the importance of tax cuts (in the US) and spending hikes (in the UK) to offset the decline in wealth suring major recessions and financial crises. Overall, our results provide evidence of a non-stabilizing effect of government debt, a countercyclical policy and a vigilant track of wealth developments by fiscal authorities.fiscal policy, wealth composition, asset prices

    Travel through the oceans: augmented reality to enhance learning in early childhood education

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    Early education plays an important role in the education system and students success in a digital society. Kindergarten pedagogy innovation by integrating technology is recognized as lacking research, however an area which needs to be improved. In this context, augmented reality showed an unprecedented growth, particularly in what regards society and marketing purposes, being recognized as having great potential this decade in the educational innovation area. This ongoing research-based methodology aims to understand both students and educator’s perceptions, abilities and difficulties in using augmented reality. The Case study reports to a Portuguese kindergarten with a class of five-year old students (N=24). The project was designed to enhance children's knowledge about the ocean species® characteristics (habitat, length/ size, food). A world map was produced and augmented reality was added to improve their motivation in the learning process and to acquire research skills. Furthermore, the study provides evidence of AR capabilities to promote interactive and collaborative work

    CaracterĂ­sticas morfolĂłgicas do sequestro pulmonar

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    ABSTRACTThe pulmonary sequestration corresponds to pulmonary tissue intra or extra-lobar with systemic arterial nutrition and collateral bronchial ramification. It is unfrequent and the intra-lobar identification depends on the correct clinical signs and morphology.The correct study includes imagiologic identification of the systemic artery and morphological characterization of parenchymal changes. These allow identification of abnormal pulmonary parenchyma in intra-lobar cases and were observed using histochemical and imunohistochemical routine methods, both in intra and extra-lobar cases. Four cases of intra-lobar sequestration and four cases of extra-lobar sequestration were studied with application of histochemical technics – Movat’s pentachrome stain and Verhoeff – and immunolabelling with CK7 and TTF1.The parenchymal inflammatory distortion by colagenization was constantly seen as was BALT hyperplasia and pleuritis.By using Movat’s pentachrome stain we characterized the sequestration by identifying the artery and the parenchymal changes.The CK7 was usefull in the identification of parenchymal damage, together with the antibody anti-TTF1 that had a variable expression, stronger in areas of inflammation because of PII hyperplasia.REV PORT PNEUMOL 2003 IX (2): 153-16

    Antenas lente de feixe amplo impressas em 3D

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    The recent evolution of radio communications combined with innovative manufacturing techniques, such as 3D printing, has driven antennas development and implementation of new structures made of unusual materials. An example of this type of evolution are the lens antennas. Lens antennas are always associated with a source antenna (usually a microstrip patch antenna) and allow changing the source antenna’s radiation characteristics (varying the gain or directivity). Thus, lenses can improve the performance of some types of communication systems, such as phased arrays, which are used for beamforming. However, they have some limitations in coverage due to the array elements having low directivity. The use of a lens antenna changes the radiation diagram to obtain a wider beamwidth and is a potential solution to the problem of phased arrays. Throughout this dissertation, was studied the possibility of using lens antennas to change the radiation beam and increase the beamwidth of a simple microstrip patch antenna. For this purpose, simulations of several lens antenna structures were performed with a patch antenna (calibrated for 7.8GHz) to determine the array’s behavior and verify if it is possible to increase the beamwidth. One of the requirements to produce prototypes of lens antennas with 3D printing is knowing the electrical characteristics of the manufacturing materials (PLA, PETG, and nylon), more precisely, their dielectric constant. For that several samples of these materials were characterized considering different manufacturing conditions. The last step is the fabrication, by 3D printing, of prototype antennas using different materials and fabrication conditions. Nine lenses (six with a single material structure and three with several different materials) and seven patch antennas (five linearly polarized and two circularly polarized) were fabricated. Finally, was made a comparative study of the results obtained by simulation with the measurements performed in an anechoic chamber for both the patch antennas and the lens antenna array.A recente evolução das radiocomunicaçÔes combinada com as inovadoras tĂ©cnicas de fabrico, como a impressĂŁo 3D, impulsionaram o desenvolvimento e implementação de antenas com novas estruturas fabricadas com materiais incomuns. Um exemplo deste tipo de evolução sĂŁo as antenas lente. As antenas lente estĂŁo sempre associadas a uma antena fonte (usualmente uma antena microstrip patch) e permitem alterar as caraterĂ­sticas de radiação (variar o ganho ou a directividade) da antena fonte. Assim, as lentes podem ser usadas para melhorar o desempenho de alguns tipos de sistema radiantes, como por exemplo o caso dos phased arrays, utilizados para fazer beamforming. No entanto, estes apresentam algumas limitaçÔes de cobertura, devido aos seus elementos do array terem ganho diretivo variĂĄvel na zona de interesse. A utilização duma antena lente faz com que ocorra a alteração do diagrama de radiação de modo a obter uma maior largura de feixe podendo ser uma solução para referida limitação. Ao longo desta dissertação foi estudada a possibilidade de se utilizarem lentes para aumentar a largura de feixe de uma simples antena microstrip patch. Para isso, foram estudadas e realizadas simulaçÔes de vĂĄrias estruturas de antenas lente com uma antena patch (calibrada para os 7.8GHz) com o intuito de determinar qual o comportamento do conjunto e verificar a possibilidade de tornar mais uniforme o diagrama de radiação no semi-espaço pretendido . A produção de protĂłtipos de antenas lente com a impressĂŁo 3D requer o conhecimento das caracterĂ­sticas elĂ©tricas dos materiais de fabrico (PLA, PETG e nylon), mais precisamente sua constate dielĂ©trica. Para tal, foi feita uma caracterização de vĂĄrias amostras desses materiais tendo em conta diferentes condiçÔes de fabrico. A Ășltima etapa foi a fabricação, por impressĂŁo 3D, de protĂłtipos de antenas e lentes, utilizando diferentes materiais e condiçÔes de fabrico. No total foram fabricadas nove lentes (seis com uma estrutura de um Ășnico material e trĂȘs com vĂĄrios materiais distintos) e sete antenas patch (cinco de polarização linear e duas de polarização circular). Finalmente foi feito um estudo comparativo dos resultados obtidos por simulação com as medidas realizadas em cĂąmara anecoica tanto para as antenas patch, como para o conjunto antena lente.Mestrado em Engenharia EletrĂłnica e TelecomunicaçÔe

    Reasons and possible constraints resulting from the lack of an aggregating concept for the theme of "media education"

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    Apesar de uma das tendĂȘncias da investigação do campo da “Educação para os Media” ir no sentido da criação de um quadro conceptual operatĂłrio para a literacia mediĂĄtica, nĂŁo existe um conceito agregador para definir esta ĂĄrea. HĂĄ vĂĄrias denominaçÔes que aparentemente pretendem significar a mesma coisa. Com este artigo pretende-se responder Ă  pergunta: por que Ă© que nĂŁo existe uma Ășnica definição para designar “Educação para os Media”? Para alĂ©m disso, espera-se contribuir com um quadro explicativo para a existĂȘncia dessa situação, avançando-se com eventuais razĂ”es para isso. Pretende-se, tambĂ©m, observar se isso configura um eventual constrangimento para que o campo se afirme em termos de investigação.Although one of the investigation trends in “Media Education” go towards the creation of a conceptual framework for media literacy surgery, there isn’t an aggregate concept to define this area. There are several denominations who apparently intended to mean the same thing. With this article it is intended to answer the question: Why isn’t there a single definition to describe “Media Education”? In addition, it is also expected to contribute to an explanatory framework for the existence of this situation, moving forward with any reasons. The aim is also to observe if it sets up a potential embarrassment for the field is stated in terms of research

    O difícil percurso da lusofonia pelos trilhos da ‘portugalidade’

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    Com este artigo, pretendemos observar de que modo a ‘portugalidade’ – termo cunhado durante o Estado Novo – pontua a construção da lusofonia, que Ă© um conceito pĂłs-colonial. NĂŁo obstante afirmar-se que apenas falta colocĂĄ-lo em prĂĄtica, o conceito de lusofonia nĂŁo Ă© consensual, subsistindo vĂĄrios equĂ­vocos interpretativos. Ou se olha para ele a partir de uma centralidade portuguesa, reconstruindo as narrativas do antigo impĂ©rio, pela via do luso-tropicalismo ou ainda numa lĂłgica de histĂłria do ressentimento. Ainda que, de forma residual, o discurso polĂ­tico portuguĂȘs faça a ligação entre ‘portugalidade’ e lusofonia, concluĂ­mos que ambos os conceitos, quando associados, sĂŁo incompatĂ­veis, jĂĄ que remetem sempre para uma centralidade portuguesa, o que nĂŁo Ă© compaginĂĄvel com uma lĂłgica pĂłs-colonial, de interculturalidade.In this article we set out to show how ‘Portugality’, a term coined under the Estado Novo (New State) regime, peppers the construction of lusophony, which is a postcolonial concept. Though it is said that all that remains is to put it into practice, the concept of lusophony is not consensual since it has been interpreted in various ways. It is viewed from the standpoint of Portuguese centrality, with the reconstruction of narratives from the former empire, or via lusotropicalism, or from the perspective of a history of resentment. Even though Portuguese political discourse forms the link between ‘Portugality’ and lusophony, albeit residually, we conclude that when associated the two concepts are incompatible. This is because they always refer to a Portuguese centrality that cannot be reconciled with a postcolonial rationale of interculturality.Dans cet article, nous nous proposons de rĂ©flĂ©chir comment la ‘portugalité’, un terme inventĂ© pendant l’État Nouveau (Estado Novo), ponctue la construction de la lusophonie, qui est un concept postcolonial. MĂȘme si l’on dit qu’il ne manque plus que de le mettre en pratique, le concept de lusophonie n’est pas consensuel, puisqu’il subsiste diverses interprĂ©tations Ă©quivoques. Du point de vue portugais, la lusophonie est souvent considĂ©rĂ©e comme une reconstruction de rĂ©cits de l’ancien empire, via le luso-tropicalisme, ou du point de vue de l’histoire du ressentiment. MĂȘme si le discours politique portugais fait le lien entre la ‘portugalité’ et la lusophonie, nous concluons que, lorsqu’elles sont associĂ©es, les deux notions sont incompatibles, parce qu’elles se rĂ©fĂšrent toujours Ă  une centralitĂ© portugaise qui ne peut pas ĂȘtre conciliĂ©e avec une logique postcoloniale de l’interculturalitĂ©

    The film "The Golden Cage": reflections on the massive return of Portuguese emigration and the 'portugalidade’ of an (increasingly less) golden cage

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    A histĂłria de um casal de emigrantes portugueses em França bateu, no verĂŁo de 2013, recordes de audiĂȘncia nas salas de cinema. O filme “A Gaiola Dourada”, de Ruben Alves, recuperou a temĂĄtica da emigração portuguesa, numa altura em que esta atingiu o boom registado nos anos 1960. Recorrendo ao seu percurso, o realizador refere-se Ă  ‘portugalidade’ como alegada ‘pertença a Portugal’, que assume como um clichĂ©, e utiliza de forma humorĂ­stica vĂĄrios estereĂłtipos associados aos emigrantes portugueses, atravĂ©s dos quais Ă© mostrada alguma vergonha que os filhos dos emigrantes sentem em relação ao comportamento dos pais, trazendo ao de cima os contrastes com a sociedade onde vivem. A grande ficção reside no regresso ao paĂ­s de origem, concretizando o sonho da grande maioria dos emigrantes, mas subvertendo a lĂłgica: no filme, nĂŁo sĂŁo os pais que voltam a Portugal, mas os filhos, que aparentemente pouco se identificam com o paĂ­s dos progenitores. “A Gaiola Dourada” reintroduziu o debate sobre a emigração em Portugal, aproveitando a crise econĂłmica para refletir sobre o seu regresso em força, bem como traçar o perfil dos novos emigrantes. SerĂĄ que os portugueses na ‘diĂĄspora’ ainda reavivam a chama ‘lusitana’ (Gonçalves, 2009)? E serĂĄ que a partilha do nome ‘Portugal’ basta para sublinhar uma alegada identidade nacional (Sobral, 2012)?The story of a couple of Portuguese migrants in France hit in the summer of 2013, the record ratings in theaters. The film "The Golden Cage" by Ruben Alves, recovered the theme of Portuguese emigration, at a time when this reached the boom recorded in the 1960s. Filmmaker refers to ‘portugalidade’ as an alleged 'belonging to Portugal', using his own route, which named as a clichĂ©, and uses multiple stereotypes in a humorous way by which some shame that the children of immigrants feel toward their parents , as well as contrasts with the society they live in is shown. The great fiction in the film is the anticipation of the return to the country of origin, fulfilling the dream of subverting the logic: in the film, there are not the parents that returns back, but the children, who apparently aren’t identified with the country of progenitors. The film sparked the debate about emigration, taking advantage of the economic crisis to reflect on his return in force as well as the profiles of new migrants. Did the Portuguese in the ‘diaspora’ still rekindle the 'Lusitanian' flame (Gonçalves, 2009)? And is the sharing of the name ‘Portugal’ enough just to highlight an alleged national identity (Sobral, 2012)?(undefined

    A ternura do grotesco no encontro de Paula Rego com AdĂ­lia Lopes

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    A ruptura em relação Ă  conceptualização clĂĄssica de arte, problematizando o conceito de ‘sublime’ - em que se verificou um abaixamento de valores, da eternidade para a corporalidade - leva-nos ao grotesco e sobre o que se entende por arte, belo e, em consequĂȘncia, pelo seu contrĂĄrio. Com este artigo, pretende-se saber de que forma Ă© que o grotesco se dissemina nas pinturas de Paula Rego e os escritos de AdĂ­lia Lopes e se o que a primeira referiu em relação Ă  obra de AdĂ­lia e Ă s suas prĂłprias produçÔes, usando o epĂ­teto de “grotesco belo” e possuidor de “muita ternura”, Ă© verificĂĄvel. As postulaçÔes principais sobre o grotesco foram produzidas por Mikhail Bakhtin, Wolfgang Kayser e Victor Hugo. Para alĂ©m das produçÔes de cada uma das criadoras, foi tambĂ©m observado o cruzamento de ambas no livro “Obra”, uma antologia de AdĂ­lia Lopes, com imagens da autoria de RegoThe break with the classical conceptualization of art, questioning the concept of ‘sublime’ - in which there was a lowering of values, from eternity to embodiment - brings us to the grotesque and what is meant by art, beautiful and, consequently, its opposite. With this article, we intend to find out how the grotesque is spread through the paintings of Paula Rego and the writings of AdĂ­lia Lopes and if what the painter commented about AdĂ­lia’s work, and her own artistic productions, using the epithet “grotesque beautiful” and having “a lot of tenderness”, is verifiable. The main postulates on the grotesque were produced by Mikhail Bakhtin, Wolfgang Kayser and Victor Hugo. In addition to the productions of each one of the creators, the crossing of both authors was also observed in the book “Obra”, an anthology of AdĂ­lia Lopes, with images by Rego

    A luz, as sombras e a procura da verdade. Os média e a construção de uma realidade equívoca e totalizante

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    A luz, associada Ă  ideia de verdade, realça o real que vive dela e a reflete em tons diferenciados. PlatĂŁo (”Alegoria da Caverna”) observava que a caverna correspondia ao mundo do visĂ­vel e o sol ao fogo cuja luz se projetava dentro dela. Para Nietzsche ‘verdade’ era um ponto de vista, sendo que Umberto Eco prefere as mentiras (Eco, 2015). JosĂ© Saramago (Ensaio sobre a cegueira) utiliza inĂșmeras metĂĄforas para explicar como Ă© que as pessoas vĂŁo cegando no mundo contemporĂąneo. Existem, por conseguinte, vĂĄrias realidades, todas elas socialmente construĂ­das (Berger & Luckmann, 1999). A anterior visĂŁo do mundo, demasiado primĂĄria, quando nĂŁo excluĂ­a Deus, interpretava as noçÔes de “CĂ©u” e “Inferno” como consequĂȘncias das prĂłprias açÔes humanas (Mattoso, 2012). O certo Ă© que, apesar da anunciada morte de Deus, ainda hoje a incerteza e o vazio reativam antigas e novas espiritualidades (Lipovetsky, 2007). O que significa entĂŁo, hoje, a verdade? SerĂĄ que a luz ilumina a realidade? A luminosidade em excesso nĂŁo pode provocar cegueira? HĂĄ um mundo paralelo criado pela dissimulação da luz? O dos mĂ©dia, por exemplo, que deixam fora do agenda setting e do framing, a maior parte da realidade? SĂŁo estas reflexĂ”es que tentarei desenvolver neste artigo.The light associated with the idea of truth, enhances the actual living of it and reflects it in different tones. PlatĂŁo (”Alegoria da Caverna” [Cave Allegory]) observed that the cave corresponded to the visible world and the sun to the fire whose light projected into it. For Nietzsche 'truth' was a point of view; Umberto Eco prefers the lies (Eco, 2015). JosĂ© Saramago ( Ensaio sobre a cegueira [Blindness]) uses many metaphors to explain how people are becoming more and more blind in the contemporary world. There are therefore various realities, all of them socially constructed (Berger & Luckmann, 1999). The previous world’s view, too primary, if it didn’t exclude God, interpreted the notions of "Heaven" and "Hell" as consequences of human actions themselves (Mattoso, 2012). The truth is that despite the announced death of God, uncertainty and emptiness still reactivate old and new spiritualities (Lipovetsky, 2007). What then means the truth today? Does the light illuminate reality? Can the excess of light cause blindness? Is there a parallel world created by concealment of light? Does the media world with its agenda setting and framing , exclude most of reality? These are reflections that will be dealt with in this article.(undefined)info:eu-repo/semantics/publishedVersio
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