Estágio realizado na CentralCasa e orientado pelo Eng.º André Silva / Tese de mestrado integrado. Engenharia Informática e Computação. Faculdade de Engenharia. Universidade do Porto. 2008

Tese de mestrado. Tecnologia Multimédia. Faculdade de Engenharia. Universidade do Porto. 2008

Tendo conhecimento da importância estratégica que assume hoje em dia a comunicação de ciência, tornou-se bastante aliciante a possibilidade de realizar o estágio curricular de mestrado nesta área. Percebeu-se que a experiência de trabalho no projeto Ciência 2.0 seria uma oportunidade única de descobrir na primeira pessoa como se estabelecem, atualmente, as relações entre cientistas, jornalistas e público. Desta forma, mais do que fazer um relato do trabalho efetuado durante três meses (de l de novembro de 2011 a 31 de janeiro de 2012), com este relatório pretende-se abrir pistas para uma reflexão sobre o que é o jornalismo de ciência na realidade mediática atual. Articulando o conhecimento teórico já existente nesta matéria com a experiência adquirida ao longo do estágio, entendemos que o jornalismo de ciência deve adaptar-se e tirar partido das tendências mediáticas atuais (produção de conteúdos multimédia e utilização das ferramentas da web 2.0), de forma a transformar os novos desafios que se colocam em oportunidades para resolver alguns dos problemas que tradicionalmente o afetam.

No description available.

Zugl.: Köln, Univ., Diss., 2006

<p>The purpose of this thesis is to document the development of the graphics part of an extremely pluggable game engine/lab environment for a course in advanced game programming. This thesis is one out of five, and concerns indoor, realtime computer 3D graphics. It covers state-of-the-art techniques such as GLSL - the OpenGL Shading Language - and more well known techniques such as portal based rendering.</p>

I mitt kandidatarbete undersöker jag fantasi och kreativitet, varför vi skapar fantasivärldar och hur vi hittar till dem - finns det portaler till fantasivärldarna? Jag letar efter svar ur filosofiska perspektiv genom att läsa om fantasi och lek. Jag tittar närmare på andra konsthantverkare och konstnärers fantasivärldar och drar kopplingar till filmers fantasivärldar och sagor för att jämföra innehållen och det visuella. Om detta skriver jag i denna rapport, jag skriver även om hur min gestaltning har växt fram, formats och utvecklats och mina tankar under arbetets gång.

No description available.

Radiation portal monitors are being deployed at border crossings throughout the world to prevent the smuggling of nuclear and radiological materials; however, a tension exists between security and the free-flow of commerce. Delays at ports-of-entry have major economic implications, so it is imperative to minimize portal monitor screening time. We have developed an algorithm to locate a radioactive source using a distributed array of detectors, specifically for use at border crossings. To locate the source, we formulated an optimization problem where the objective function describes the least-squares difference between the actual and predicted detector measurements. The predicted measurements are calculated by solving the 3-D deterministic neutron transport equation given an estimated source position. The source position is updated using the steepest descent method, where the gradient of the objective function with respect to the source position is calculated using adjoint transport calculations. If the objective function is smaller than a predetermined convergence criterion, then the source position has been identified. To test the algorithm, we first verified that the 3-D forward transport solver was working correctly by comparing to the code PARTISN (Parallel Time-Dependent SN). Then, we developed a baseline scenario to represent a typical border crossing. Test cases were run for various source positions within each vehicle and convergence criteria, which showed that the algorithm performed well in situations where we have perfect knowledge of parameters such as the material properties of the vehicles. We also ran a sensitivity analysis to determine how uncertainty in various parameters-the optical thickness of the vehicles, the fill level in the gas tank, the physical size of the vehicles, and the detector efficiencies-affects the results. We found that algorithm is most sensitive to the optical thickness of the vehicles. Finally, we tested the simplifying assumption of one energy group by using measurements obtained from MCNPX (Monte Carlo N-Particle Extended). These results showed that the one-energy-group assumption will not be sufficient if the code is deployed in a real-world scenario. While this work describes the application of the algorithm to a land border crossing, it has potential for use in a wide array of nuclear security problems.

The development and application of internet successfully changed human¡¦s life. For example, when going shopping ,you don¡¦t go outside and compare the different prices in different stores. With the various applications of internet, all kinds of information form internet is overloading and the internet users are hard to explore the websites which is useful and meaningful. Therefore, the portal website is created to solve the problem. Jerry Yang established the first portal website named Yahoo! which is based on a catalogic search engine, and the Yahoo! Business model became the basic framework of portal websites. In Taiwan, Yam is the first Chinese portal website and then Pchome and Yahoo! kimo entered the market and shared the market value. Because of the internet bubble in 2000, The rising situation of market competition has changed rapidly, and only the survivors can face the crisis and decide to change their business models to find the definite position. The research is based on the framework of RBV to discuss the different business model of the three representative companies¡ÐYam, Pchome Online and Yahoo! kimo. According to the RBV, we can understand the resources of the three companies and analysis how to use the different resources to form their business model. The result of the research shows that the relationship between resources and business model, and describe the different shapes of the three companies. I hope that the case study of the research can be an good example to other potential portal website to create their competitive advantage