Design and implementation of a cloud-based membership system for vehicular cooperation

Tese de mestrado, Engenharia Informática (Arquitetura, Sistemas e Redes de Computadores) Universidade de Lisboa, Faculdade de Ciências, 2019Personal vehicles such as cars are the transportation method chosen by most people, and thanks to this, our cities are built around them, with roads that go to any place you could ever need to go. Given the number of daily vehicles in our cities, the pollution levels and traffic congestion are higher than ever. Traffic makes everyone’s life harder, and just creates more pollution, which ends up making living in a city a lot harder than it should. Multiples solutions have been proposed to help fixing this problem, but none of them work as expected or in the long run. Nowadays, the first autonomous vehicles are starting to appear, and consequently, bringing the opportunity to once again, try to solve this problem. Current autonomous vehicles are simple and still not a viable option for daily transportation, but everything shows that is likely to change soon. They already help a lot with traffic and pollution, but sadly, not as much as we would like, which means it will not be enough in the long run and another solution is needed. The existing ones make their decisions solely based on their own sensors and nothing else. That is, it is the only view they have of the external world. Even considering this, these vehicles are still not perfect as there is still a subject that was not well explored, communication between vehicles. Vehicle coordination is the next big step and an essential missing factor that has to be considered for the next generation of autonomous vehicles. By being able to communicate with each other, vehicles will be able to cooperate and share useful information about their own decisions or the outside environment. A solution such as this would help considerably with our current traffic issue and we believe that this could be a long term solution with the advantage of reducing pollution (due to higher efficiency), higher passenger security, and making everyone’s lives easier

Predictors of Interstitial Lung Disease in Mixed Connective Tissue Disease

Interstitial lung disease (ILD) frequently complicates mixed connective tissue disease (MCTD) and contributes to increased mortality. We aimed to identify predictors of ILD in MCTD patients. This is a nationwide, multicentre, retrospective study including patients with an adult-onset MCTD clinical diagnosis who met Sharp’s, Kasukawa, Alarcón-Segovia, or Kahn’s diagnostic criteria and had available chest high-resolution computed tomography (HRCT) data. Univariate and multivariate analyses were conducted. We included 57 MCTD patients, with 27 (47.4%) having ILD. Among ILD patients, 48.1% were asymptomatic, 80.0% exhibited a restrictive pattern on pulmonary function tests, and 81.5% had nonspecific interstitial pneumonia on chest HRCT. Gastroesophageal involvement (40.7% vs. 16.7%, p = 0.043) and lymphadenopathy at disease onset (22.2% vs. 3.3%, p = 0.045) were associated with ILD. Binary logistic regression identified lymphadenopathy at disease onset (OR 19.65, 95% CI: 1.91–201.75, p = 0.012) and older age at diagnosis (OR 1.06/year, 95% CI: 1.00–1.12, p = 0.046) as independent ILD predictors, regardless of gender and gastroesophageal involvement. This study is the first to assess a Portuguese MCTD cohort. As previously reported, it confirmed the link between gastroesophageal involvement and ILD in MCTD patients. Additionally, it established that lymphadenopathy at disease onset and older age at diagnosis independently predict ILD in MCTD patients

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved