Thermal regime of the Southeast Indian Ridge between 88°E and 140°E: Remarks on the subsidence of the ridge flanks

The flanks of the Southeast Indian Ridge are characterized by anomalously low subsidence rates for the 0-25 Ma period: less than 300 m Ma(-1/2) between 101 degrees E and 120 degrees E and less than 260 m Ma(-1/2) within the Australian-Antarctic Discordance (AAD), between 120 degrees E and 128 degrees E. The expected along-axis variation in mantle temperature (similar to 50 degrees C) is too small to explain this observation, even when the temperature dependence of the mantle physical properties is accounted for. We successively analyze the effect on subsidence of different factors, such as variations in crustal thickness; the dynamic contribution of an old, detached slab supposedly present within the mantle below the AAD; and depletion in phi(m), a parameter here defined as the "ubiquitously distributed melt fraction" within the asthenosphere. These effects may all contribute to the observed, anomalously low subsidence rate of the ridge flanks, with the most significant contribution being probably related to the depletion in phi(m). However, these effects have a deep-seated origin that cannot explain the abruptness of the transition across the fracture zones that delineate the boundaries of the AAD, near 120 degrees E and near 128 degrees E, respectively.

Exploring the contradictions between Brazil’s role in the global climate change regime and its position in regional environmental governance.

Similar to other developing countries Brazil’s position on climate change emphasises national sovereignty and the principle of “common but differentiated responsibilities”. However, in recent years Brasilia has also announced voluntary reductions in carbon emissions, making Brazil one of the leading emerging countries in its approach to climate change, while enhancing its international reputation and legitimacy. Compared to its neighbours Brazil has older and more developed domestic environmental institutions and movements. Yet, Brazil’s global leadership on climate change does not translate into a similar role in regional environmental governance. In the 2000s Argentina and Uruguay became embroiled in a bitter environmental conflict involving a shared natural resource, the Uruguay River. Brazil not only refused to mediate, but also kept it out of regional forums insisting on the conflict’s bilateral nature. Furthermore, Mercosur’s environmental agenda has progressively become eroded while Brazilian-led Unasur lacks an institutional framework dedicated to environmental concerns. This indicates that environmental concerns are far more important for Brazil’s global image than for its role as a regional leader. It also highlights the limited scope of the climate change negotiations which focus narrowly on reducing carbon emissions, without taking wider concerns over energy generation or environmental and social justice into account. Brazil has promoted hydropower generation, portrayed as “clean” energy. Yet, these projects have sparked strong domestic and regional civil society opposition due to their social and environmental costs which make it difficult for Brazil to claim a regional leadership role on environmental concerns.

Dos prejuízos no regime de participation exemption: a relação entre estabelecimento estável e filial

Mestrado em Fiscalidade

Desigualdade de rendimento no Alentejo do Antigo Regime: Arraiolos, Avis e Portalegre (1690-1725)

A desigualdade era um dos elementos estruturantes da sociedade do Antigo Regime. Partindo desta ideia central, propõe-se neste trabalho determinar a desigualdade de rendimento dos contribuintes dos concelhos de Arraiolos, de Avis e de Portalegre, todos na província do Alentejo, integrando-os na problemática da variabilidade de rendimento das sociedades europeias pré-industriais. As fontes nucleares para este trabalho são os registos de pagamento do imposto da décima, contribuição direta e universal talhada para fazer face às despesas da Guerra da Restauração e que perdurou até ao final do Antigo Regime, sendo profundamente alterado durante a monarquia constitucional. Incidindo sobre diversos tipos de rendimento, consubstancia uma fonte de grande importância para o estudo da economia pré-industrial.

FLOW REGIME DRIVEN THERMAL ENHANCEMENT IN INTERNALLY-GROOVED TUBES

Internally-grooved refrigeration tubes maximize tube-side evaporative heat transfer rates and have been identified as a most promising technology for integration into compact cold plates. Unfortunately, the absence of phenomenological insights and physical models hinders the extrapolation of grooved-tube performance to new applications. The success of regime-based heat transfer correlations for smooth tubes has motivated the current effort to explore the relationship between flow regimes and enhanced heat transfer in internally-grooved tubes. In this thesis, a detailed analysis of smooth and internally-grooved tube data reveals that performance improvement in internally-grooved tubes at low-to-intermediate mass flux is a result of early flow regime transition. Based on this analysis, a new flow regime map and corresponding heat transfer coefficient correlation, which account for the increased wetted angle, turbulence, and Gregorig effects unique to internally-grooved tubes, were developed. A two-phase test facility was designed and fabricated to validate the newly-developed flow regime map and regime-based heat transfer coefficient correlation. As part of this setup, a non-intrusive optical technique was developed to study the dynamic nature of two-phase flows. It was found that different flow regimes result in unique temporally varying film thickness profiles. Using these profiles, quantitative flow regime identification measures were developed, including the ability to explain and quantify the more subtle transitions that exist between dominant flow regimes. Flow regime data, based on the newly-developed method, and heat transfer coefficient data, using infrared thermography, were collected for two-phase HFE-7100 flow in horizontal 2.62mm - 8.84mm diameter smooth and internally-grooved tubes with mass fluxes from 25-300 kg/m²s, heat fluxes from 4-56 kW/m², and vapor qualities approaching 1. In total, over 6500 combined data points for the adiabatic and diabatic smooth and internally-grooved tubes were acquired. Based on results from the experiments and a reinterpretation of data from independent researchers, it was established that heat transfer enhancement in internally-grooved tubes at low-to-intermediate mass flux is primarily due to early flow regime transition to Annular flow. The regime-based heat transfer coefficient outperformed empirical correlations from the literature, with mean and absolute deviations of 4.0% and 32% for the full range of data collected.

The New Silk Road, a Glimpse to China's Regime?

China's Silk Road Economic Belt plan is a part of One Belt, One Road initiative that aims to create trade routes from China all the way to Europe. Despite the potential benefits, there are also problems along the way. In this research I am examining the adverse effects of one part of the Silk Road Economic Belt with my focus on Xinjiang Uyghur minority and their rights and Central Asian regional stability. Moreover, I suggest that China's past commitments in the international society as well as her actions in relations to the undertaking can give an insight into a regime where China would be the dominant power in international society. I have used qualitative analysis to study the topics. My most important methodological tools to examine the topics are as follows. I utilise conceptual analysis to borrow concepts from international relations field. I use method of situation analysis when I am describing the current circumstances in China's Xinjiang and Central Asia. Inductive analysis is the overall method since I suggest that the content I have examined could give an insight to how China regards and relates to international law in the future. Moreover, my theoretical framework of the research sees international law as a tool that a state can use to gain more power but at the same time international law restricts state's behaviour. Based on the findings of this research, in case of Xinjiang the New Silk Road is likely to worsen Uyghurs situation because of Beijing's worries and harsh actions to prevent any disturbance. However, the New Silk Road could bring stability and maintain regional security in Central Asia when the states could see it beneficial to unite for cooperation which can result with greater benefits. China's potential future regime will emphasize sovereignty and non-interference to states’ domestic matters. Moreover, there will be no room for minority rights in China's concept of human rights. Human rights are meant to protect rights of masses but are of secondary importance since development and security will be more important goals to pursue. In the field of cooperation, China is increasingly using multilateral forums to discuss the matters but reserves bilateral negotiations for executing the plans.

All-regime Lagrangian-Remap numerical schemes for the gas dynamics equations. Applications to the large friction and low Mach coefficients

In this talk, we propose an all regime Lagrange-Projection like numerical scheme for the gas dynamics equations. By all regime, we mean that the numerical scheme is able to compute accurate approximate solutions with an under-resolved discretization with respect to the Mach number M, i.e. such that the ratio between the Mach number M and the mesh size or the time step is small with respect to 1. The key idea is to decouple acoustic and transport phenomenon and then alter the numerical flux in the acoustic approximation to obtain a uniform truncation error in term of M. This modified scheme is conservative and endowed with good stability properties with respect to the positivity of the density and the internal energy. A discrete entropy inequality under a condition on the modification is obtained thanks to a reinterpretation of the modified scheme in the Harten Lax and van Leer formalism. A natural extension to multi-dimensional problems discretized over unstructured mesh is proposed. Then a simple and efficient semi implicit scheme is also proposed. The resulting scheme is stable under a CFL condition driven by the (slow) material waves and not by the (fast) acoustic waves and so verifies the all regime property. Numerical evidences are proposed and show the ability of the scheme to deal with tests where the flow regime may vary from low to high Mach values.

Novo regime fiscal constante da pec nº 241/2016: análise dos Impactos nas políticas educacionais

Avalia o impacto nas políticas educacionais, previstas na Constituição, no Plano Nacional de Educação e no Plano Plurianual, com a implantação do “Novo Regime Fiscal” constante da PEC nº 241/2016, ora em tramitação no Congresso Nacional.

Serviço de Apoio à Inclusão em eLearning (SAIeL) : educação para todos : contributo para a inclusão de cidadãos com necessidades educativas especiais no ensino superior a distância em regime de elearning

A proposta de um Serviço de Apoio à Inclusão em eLearning (SAIeL) surge da necessidade de promover o eLearning como uma ferramenta importante para que os cidadãos com Necessidades Educativas Especiais possam aceder e ter sucesso no Ensino Superior. O trabalho desenvolveu-se em torno da seguinte pergunta de partida: Cumprindo o seu papel social de Educação para Todos, de que forma podem as instituições de ensino superior facilitar ativamente o acesso e o sucesso de cidadãos com Necessidades Educativas Especiais que desejem estudar em regime de eLearning? Constituindo o ensino a distância de nova geração, uma opção com características bastante vantajosas para os cidadãos com Necessidades Educativas Especiais, pretende-se também atrair mais cidadãos para esta modalidade de educação, através da oferta e divulgação de condições mais apelativas e que encorajem as pessoas com Necessidades Educativas Especiais a prosseguir os seus estudos ao nível superior, reduzindo as barreiras e promovendo os fatores de inclusão. Procurou-se delinear um projeto de serviço que possa responder às necessidades identificadas a partir de um conjunto de fatores: i) da investigação sobre a resposta a esta problemática por parte dum conjunto de universidades de Ensino a Distância, ii) das boas práticas já existentes em instituições de ensino superior portuguesas e iii) do estudo das perceções recolhidas junto dos vários intervenientes: estudantes, professores e cidadãos com NEE. Neste quadro, foram definidas 3 fases para a elaboração do trabalho: (1) auscultação dos intervenientes e levantamento de necessidades; (2) enquadramento do projeto de serviço na orgânica das instituições de ensino superior a distância e (3) organização e estruturação de um projeto de serviço através da elaboração de um Regimento, no qual são estipulados os seus objetivos, valências, competências e forma de avaliação, de maneira a dar resposta às necessidades identificadas previamente e a prevenir situações futuras.

Caracterização analítica e geométrica da metodologia geral de determinação de distribuições de Weibull para o regime eólico e suas aplicações

O regime eólico de uma região pode ser descrito por distribuição de frequências que fornecem informações e características extremamente necessárias para uma possível implantação de sistemas eólicos de captação de energia na região e consequentes aplicações no meio rural em regiões afastadas. Estas características, tais como a velocidade média anual, a variância das velocidades registradas e a densidade da potência eólica média horária, podem ser obtidas pela frequência de ocorrências de determinada velocidade, que por sua vez deve ser estudada através de expressões analíticas. A função analítica mais adequada para distribuições eólicas é a função de densidade de Weibull, que pode ser determinada por métodos numéricos e regressões lineares. O objetivo deste trabalho é caracterizar analítica e geometricamente todos os procedimentos metodológicos necessários para a realização de uma caracterização completa do regime eólico de uma região e suas aplicações na região de Botucatu - SP, visando a determinar o potencial energético para implementação de turbinas eólicas. Assim, foi possível estabelecer teoremas relacionados com a forma de caracterização do regime eólico, estabelecendo a metodologia concisa analiticamente para a definição dos parâmetros eólicos de qualquer região a ser estudada. Para o desenvolvimento desta pesquisa, utilizou-se um anemômetro da CAMPBELL.

Circuit Quantum Electrodynamics with Transmon Qubits in the Ultrastrong Coupling Regime

68 pg.

Avaliação dos efeitos secundários induzidos pela administração oral de ciclofosfamida em regime de quimioterapia metronómica em cães e gatos : estudo retrospetivo de 36 casos

Dissertação de Mestrado Integrado em Medicina Veterinária

Ecologically relevant characteristics of flow-regime of Rufiji Basin in Tanzania (an ensemble of ecohydrological clues to infer associeted ramifications on dtream and ecosystem)

Dissertação de Mestrado, Ecohidrologia - Erasmus Mundus, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2014