TSKY: a dependable middleware solution for data privacy using public storage clouds

Dissertação para obtenção do Grau de Mestre em Engenharia Informática

Expanding the magic circle in pervasive casual play

Dissertação para obtenção do Grau de Doutor em Informática

Things we see: Portuguese anthropology on material culture

Part of the objects that anthropologists can now find in Lisbon result from the existence of networks with rather diverse historical, social and cultural origins, linking Angola, Mozambique, Cape Verde, Guinea-Bissau, Brazil and Portugal, as well as the countries which have attracted all these countries’ diasporas. The publishing of papers by Portuguese and Brazilian anthropologists in this dossier dedicated to consumption might come to generate a productive collaboration between researchers from both countries, which for over five centuries have seen arriving from the other side of the Atlantic strange objects that, in turn, have taken the routes of the diasporas mentioned above, from luxurious and whimsical items as the indigenous leaders’ feathers and the carriages of the Portuguese royalty, to common and irreplaceable goods as the havaianas.

InOut Project – Doing the things right & doing the right things

A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics

A transformação dos valores em valor: a internet como "atrium" para a comunicação da resposabilidade social

A presente investigação pretende avaliar os objectivos da comunicação empresarial sobre responsabilidade social e identificar os traços comuns da linguagem utilizada. Utilizando os sítios de internet como fontes de dados, procurou-se estabelecer um mapa conceptual desta comunicação que permitisse identificar os objectivos que lhe estão subjacentes. Para a investigação foi seguido o método preceituado pela Grounded Theory sobre as declarações relativas a responsabilidade social das empresas recolhidas nos sítios de internet das 10 empresas consideradas como melhores em termos de responsabilidade social e das 10 maiores empresas a actuar em Portugal. Os resultados obtidos permitem relevar o papel único da internet como espaçofronteira entre a empresa e o seu meio envolvente, um espaço de confirmação para os stakeholders internos e de legitimação perante os stakeholders externos. A comunicação estabelecida através da internet tem como principal objectivo a construção de uma identidade organizacional que possibilite a sobrevivência no longoprazo, organizando as empresas esta comunicação por stakeholder e dando prioridade àqueles que maior impacto têm na sua acção.

Narrative Bifurcation, Cloud Computing Interfaces and Hitchcok

From a narratological perspective, this paper aims to address the theoretical issues concerning the functioning of the so called «narrative bifurcation» in data presentation and information retrieval. Its use in cyberspace calls for a reassessment as a storytelling device. Films have shown its fundamental role for the creation of suspense. Interactive fiction and games have unveiled the possibility of plots with multiple choices, giving continuity to cinema split-screen experiences. Using practical examples, this paper will show how this storytelling tool returns to its primitive form and ends up by conditioning cloud computing interface design.

Caracterização de serviços de Internet geo-replicados

Dissertação para obtenção do Grau de Mestre em Engenharia Informática

Reconceptualising public spaces of (IN)equality: sensing and creating layers of visibility

Tese apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em Geografia e Planeamento Territorial - Especialidade: Geografia Humana

Internet como ferramenta na aula de E/LE. Um meio de aprendizagem intercultural

Relatório de Estágio de Mestrado em Ensino de Espanhol

O uso da Internet e da Web 2.0 na difusão e acesso à informação arquivística: o caso dos arquivos municipais portugueses

Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ciência da Informação e Documentação – Área de especialização em Arquivística

FairSky: gestão confiável e otimizada de dados em múltiplas nuvens de armazenamento na internet

Dissertação para obtenção do Grau de Mestre em Engenharia Informática

A distributed platform for the volunteer execution of workflows on a local area network

Thesis submitted in fulfilment of the requirements for the Degree of Master of Science in Computer Science

Heterogeneous computing with an algorithmic skeleton framework

The Graphics Processing Unit (GPU) is present in almost every modern day personal computer. Despite its specific purpose design, they have been increasingly used for general computations with very good results. Hence, there is a growing effort from the community to seamlessly integrate this kind of devices in everyday computing. However, to fully exploit the potential of a system comprising GPUs and CPUs, these devices should be presented to the programmer as a single platform. The efficient combination of the power of CPU and GPU devices is highly dependent on each device’s characteristics, resulting in platform specific applications that cannot be ported to different systems. Also, the most efficient work balance among devices is highly dependable on the computations to be performed and respective data sizes. In this work, we propose a solution for heterogeneous environments based on the abstraction level provided by algorithmic skeletons. Our goal is to take full advantage of the power of all CPU and GPU devices present in a system, without the need for different kernel implementations nor explicit work-distribution.To that end, we extended Marrow, an algorithmic skeleton framework for multi-GPUs, to support CPU computations and efficiently balance the work-load between devices. Our approach is based on an offline training execution that identifies the ideal work balance and platform configurations for a given application and input data size. The evaluation of this work shows that the combination of CPU and GPU devices can significantly boost the performance of our benchmarks in the tested environments, when compared to GPU-only executions.