Estimating wind turbine generators failures using machine learning

The objective of this thesis is to estimate failures of wind turbine generators, using real data. It will seek to predict the failure and model it's reliability.In order to achieve this goal, machine learning algorithms, such as neural networks, support vector machines and decision trees will be used

Componentes Web/Mobile inovadores para soluções de gestão e distribuição de energia

Trabalho de projeto de mestrado, Engenharia Informática (Engenharia de Software) Universidade de Lisboa, Faculdade de Ciências, 2017A regulação no setor das energias implica que sejam cumpridos certos requisitos e níveis de serviços prestados ao cliente final. Estes requisitos são impostos às entidades de gestão pelas entidades reguladoras, o que faz com que o não cumprimento destes níveis de serviço, resulte, muitas vezes, em coimas bastante pesadas. Em Portugal, estas regulações e imposições de níveis de serviços prestados, devem-se à classificação atribuída de serviços essenciais às provedoras de energia (Distribuição de Água, Gás e Eletricidade), pois alguns clientes residenciais prestam serviços de saúde e necessitam de ser classificados como clientes prioritários/críticos. O mesmo é aplicado a serviços que, por falta da mesma, podem ter prejuízos elevados, requerendo então garantias para que lhes seja possível a exequibilidade desses serviços. Devido a elevados critérios aplicados a essa unidade de negócios, era necessário então prover as entidades fornecedoras com as ferramentas, com as soluções e com os mecanismos corretos para lhes permitir responder a todos esses critérios e, consequentemente, para evitar coimas e lhes tornar possível prestar um serviço de qualidade superior. Este relatório de projeto de mestrado focar-se-á nesse aspeto. Diamond constitui uma solução que irá permitir a gestão de ocorrências e de todos os problemas com elas relacionados. A solução, iniciada ainda quando o atual grupo CGI pertencia ao grupo Lógica, começou a ser embrionariamente planeada e ulteriormente desenvolvida em 2010, só chegando, no entanto, a ver a luz do dia em 2012. A solução foi desenvolvida inicialmente em Silverlight, utilizando o componente Bing Maps SilverLight como gestor de cartografia base e Bases de dados Oracle como base de dados de armazenamento de todas as informações relacionadas com as ordens de serviço e ocorrências. Os dias de hoje, passado um considerável número de anos, seguindo a premissa de ciclo de vida tecnológico, que especifica, aproximadamente de 3 a 5 anos até que uma tecnologia esteja ultrapassada ou morta, assumem-se como a altura de redesenhar, repensar, reimplementar e melhorar a solução, adicionando também novas funcionalidades para permitir que a solução se mantenha atual e que se adapte às novas necessidades que os novos tempos assim exigem.The regulations in the Utilities sector, implies providing certain requirements and service levels towards the final client, this demands are imposed to the distributor entities by regulatory entities. Not achieving/accomplish these levels will often results in heavy fines. In Portugal, these regulations are imposed due to distributor entities being considered as an essential service (Distribution of Water, Gas and Electricity), being that, some of the residential clients provide health care services and are classified as critical/priority services, requiring warranties to fulfil these services without interruption. Due to the high standards applied to this business area, it was necessary to provide the distributor entities with capable tools, systems and mechanisms that would allow them efficiently respond to any interruptions and be able to meet the standards and surpass them as well. The main focus of this Project Report, is Diamond, a solution that will be able to manage incidents, improving service levels, providing customers a proper and reliable service, assisting the distributor entities avoiding fines. The solution started being planned and developed back in 2010, and only seeing the day of light in 2012, developed initially in Silverlight, and using Bing maps SilverLight as the base cartography, and map management system with oracle databases. After some years and with the premise of technology life cycle, being in average from 3-5 years, it was necessary to redesign the solution, and, from scratch re-implement the old functionalities, improving them and bring some new ones to develop an improved solution. The Market was analysed, existing clients were questioned and a new solution was born to keep Diamond innovative and using the latest and most cutting edge technologies nowadays

Zircónia, uma alternativa estética para implantes na zona anterior

A utilização de implantes dentários para a substituição de espaços edêntulos é, atualmente, uma opção terapêutica bastante válida e bem documentada. Por mais de quatro décadas, o titânio convencional tem sido o material padrão para o fabrico dos mesmos. Apesar do sucesso clínico dos implantes em titânio, complicações biológicas e técnicas podem ocorrer. Em adição, complicações estéticas são frequentes uma vez que este tipo material apresenta uma cor acinzentada. Na região anterior, principalmente se existir uma linha labial alta, a presença de descoloração da mucosa peri-implantar é considerada uma desvantagem do titânio, comprometendo a estética. Consequentemente, todos estes fatores culminaram na ascensão dos implantes cerâmicos. Estes não são uma descoberta recente no campo da implantologia oral, uma vez que já tinham sido introduzidos nos anos sessenta. Inicialmente, os implantes cerâmicos eram fabricados em óxido de alumínio, mas, devido às suas fracas propriedades mecânicas, foram removidos do mercado e substituídos por implantes fabricados em zircónia tetragonal estabilizada com ítria. Assim, a zircónia é atualmente o material de escolha para o fabrico de implantes dentários de cerâmica. Além da seleção do material do implante, o tratamento de superfície à qual o implante é sujeito costuma ser realizado para se obter uma superfície rugosa. Esta mesma demonstrou melhorar o contato osso-implante e, consequentemente, a osteointegração. No entanto, da mesma forma que nos implantes convencionais, estão reportadas em diversos casos clínicos a existência de complicações técnicas e biológicas que condicionam as taxas de sucesso e de sobrevivência dos implantes em zircónia. Neste contexto, a presente revisão narrativa tem como objetivo analisar as características e indicações da reabilitação com recurso a implantes em zircónia na zona anterior comparando-as com as reabilitações com implantes convencionais de titânio.The use of dental implants to replace edentulous spaces is currently a very valid and welldocumented therapeutic option. For more than four decades, conventional titanium implants have been used as standard material for their manufacture. Despite the clinical success of titanium implants, biological and technical complications can occur. In addition, aesthetic complications are frequent as this type of material has a grayish color. In the anterior region, especially if there is a high lip line, the presence of discoloration of the peri-implant mucosa is considered a disadvantage of titanium, compromising aesthetics. Consequently, all these factors culminated in the rise of ceramic implants. These are not a recent discovery in the field of oral implantology, as they were already introduced in the sixties. Initially, ceramic implants were made of aluminum oxide, but due to their poor mechanical properties, they were removed from the market and replaced by implants made of tetragonal zirconia stabilized with yttria. Thus, zirconia is currently the material of choice for the manufacture of ceramic dental implants. In addition to the selection of the implant material, the surface treatment in which the implant is subjected is usually carried out to obtain a rough surface. It has been shown to improve bone-implant contact and, consequently, osseointegration. However, as with conventional implants, the existence of technical and biological complications that affect the success and survival rates of zirconia implants are reported in several clinical cases. In this context, this narrative review aims to analyze the characteristics and indications of rehabilitation using implants in zirconia in the anterior zone, comparing them with rehabilitations with conventional titanium implants.Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moni

Nonlinear dynamic analysis for safety assessment of heritage buildings: Church of Santa Maria de Bélem

Despite the remarkable longevity of heritage constructions, they typically present several structural fragilities inherent to their own material and constructive features. This fact is particularly relevant when seismic loads are concerned, because a very significant portion of such constructions lack adequate seismic resistance and require retrofitting interventions in order to mitigate their vulnerability. However, to guarantee the success of the interventions, the interventions should be carefully selected based on a full understanding of the dynamic response of the building and, particularly, its most vulnerable structural elements. Due to many reasons, the issues associated with this kind of analysis are still difficult to address; therefore, research on this subject should be encouraged. Taking this into account, the church of Santa Maria de Belem, one of the most emblematic buildings of the monastery of Jeronimos complex in Lisbon, is used in this work as a case study to discuss the nonlinear dynamic response of cultural heritage buildings. The nonlinear dynamic behavior of the church was numerically simulated with a three-dimensional (3D) model using artificially generated seismic acceleration time histories, in agreement with seismic hazard scenarios for return periods of 475, 975, and 5,000 years. The dynamic response of the church is discussed and a comparison against results derived from a pushover analysis is also presented. Finally, a modal analysis is presented, estimating the damage level that would be present in the church after the occurrence of such seismic scenarios.This work was partly financed by European Regional Development Fund (ERDF) funds through the Operational Programme Competitiveness Factors (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of project POCI-01-0145-FEDER-007633. The authors are also grateful to three anonymous reviewers whose comments significantly improved the clarity of the paper

The Tagus River delta (off Lisbon, Portugal) as a repository of landslides. Implications on trigger mechanisms, tsunami hazard and neotectonics.

The seismic stratigraphy of the Tagus estuary ebb-tidal delta of Lisbon (Portugal) is investigated with the purpose of searching for evidences of possible sedimentary or erosive features associated with landslides or mass wasting deposits (MTD) events. A special attention was given to events that could have been triggered by large earthquakes that are known to have struck the West of Portugal and Spain in historical and pre-historical times. These earthquakes destroyed Lisbon at least twice in the last 500 years, being the 1755 Lisbon earthquake of estimated magnitude >8.5. To investigate these geological features the seismic reflection dataset used in this work consists of Chirp (Lisboa98 dataset), Sparker single channel (PACEMAKER 2011 dataset) and multichannel seismic (MCS) data (TAGUSDELTA 2013 dataset). Cross-lines of MCS data were acquired crossing the core sampling sites done in previous works. Calibration of the seismic lines width the core data led to infer that the Tagus ebb delta started its formation around 17ky BP and it consists of two main stratigraphic units, the younger of which initiated its formation at approximately 13ky BP. The lower deltaic unit contains several MTDs and/or landslides that could not be mapped with the present dataset. In the upper unit we report the existence of a landslide with 10km of length, 4.5km of width and 20m of maximum thickness that accounted for the collapse of half of the Tagus river delta front. The internal structure of the landslide varies laterally. The main different aspects are, as follows, i) the landslide can be dismembered along slope due to stretching parallel associated to differential movement along slope, ii) it can show internal discontinuities that represent mechanical detachments that separate imbricate wedges and iii) distal deposited bodies completely detached from the main landslide body. The age of the landslide is discussed; an estimated age of >8ky BP is proposed by stratigraphic correlation with existent cores in the Tagus pro-delta. The trigger mechanisms are discussed; there appears to be a correlation between large earthquakes and tsunami and onshore/offshore high energy deposits. The non-collapsed half of the delta front contains extensive shallow gas of still unknown origin and nature that was found thanks to the seismic surveys carried out in this study. Further geochemical and isotope studies are needed to investigate the origin of the gas as well as geotechnical studies are needed to investigate the rheology and stability of the delta. The stratigraphic model produced for the study area indicates subsidence of tens of meters from Pliocene times as the post-LGM deposits and possible coastal paleo-scarps fit well with the sea level curve for this interval whilst the Pliocene-Lower Quaternary appear to be tens of meters below the same curve. The estimation of the amount of subsidence needs a good chronostratigraphic control of the external continental shelf bodies

OncoEnergy - Manual de exercício físico para pessoas com cancro

O presente manual foi desenvolvido por estudantes da Licenciatura em Fisioterapia (Unidade Curricular de Educação e Comunicação em Saúde) e investigadores do Centro de Inovação em Tecnologias e Cuidados de Saúde (ciTechCare) da Escola Superior de Saúde do Instituto Politécnico de Leiria, baseando-se num documento semelhante criado pela Associação Australiana de Ciências do Desporto. A informação apresentada baseia-se igualmente nas orientações de instituições internacionais de referência nas áreas da oncologia e do exercício, nomeadamente a European Society of Medical Oncology, American Society of Oncology, Cancer Council e o American College of Sports Medicine.info:eu-repo/semantics/publishedVersio

Age-friendly cities - some exploration data on Portalegre County

Para a OMS “O envelhecimento ativo é o processo de otimização de condições de saúde, participação e segurança, de modo a melhorar a qualidade de vida à medida que as pessoas envelhecem” dependendo de vários fatores, influências e sentimentos (OMS, 2007 citado em FCG, 2009: 5). Assim é essencial conhecermos as condições de vida destas pessoas, contemplando dimensões ligadas à territorialidade ao nível dos espaços lúdico-desportivos, habitacionais, de transporte, serviço comunitário e saúde. Importa perceber ainda a forma como é efetuada a participação e inclusão social, a participação cívica bem como as potencialidades e constrangimentos da comunicação e informação que é disponibilizada ao idoso, tendo como objetivo último melhorar as condições oferecidas aos idosos. Foi objetivo deste trabalho, gerar um retrato local onde as pessoas idosas e instituições possam fazer a sua autoavaliação e registar os progressos efetuados baseado em perceções. Como estratégia metodológica, utilizámos o questionário elaborado pela OMS e cedido em Portugal pela Associação Vida

Improved in vitro rooting of Prunus dulcis Mill. cultivars

A highly reproducible system was developed for efficient rooting of cultivars Boa Casta (BC) and Peneda and a BC seedling-derived clone (BC VII) of almond (Prunus dulcis Mill.). Twenty-four accessions derived from the clone BC VII and subjected to various in vitro culture treatments were screened. The long induction pre-treatment (LIP, 5 d), the brief induction pre-treatment (BIP, 16 h) and the hormonal shock by short dipping in hormone solution (1 min), were tested. BIP was the only that allowed rooting of cultivars. In BC VII, it induced high rooting frequencies (47 - 100 %) when using a solution of 0.4 mM indole-3-butyric acid solidified with 2 g dm-3 gellam gum for 16-h. The response to the auxin type was variable depending on the cultivar and the root induction pre-treatment used. Root number was significantly different between the two cultivars and BC VII. Root length was significantly higher when using 0.005 mM IBA in LIP but this concentration induced apical necrosis. The improved acclimatization procedure for up to 4 weeks increased the survival to 45 %. The initiation and development of adventitious roots were proved to be asynchronou

Negative symptoms mediate the relationship between social cognition and functioning in schizophrenia: a pilot study

In spite of significant advances in pharmacological and psychological treatments, schizophrenia still ranks among the leading causes of disability worldwide. People suffering from schizophrenia have significant impairment in major areas of everyday life, such as interpersonal relationships, work or school and even self-care. Enhancing the understanding of factors that hinder real-life functioning is therefore crucial for translating delivered care into more positive outcomes. Social cognition, defined as the mental operations that underlie social interactions, including perceiving, interpreting, and generating responses to the intentions, dispositions, and behaviors of others, has been implicated in impaired functioning. It is typically broken down into four domains: emotion processing, social perception, attributional bias and theory of mind. Negative symptoms have also been associated with patients' functional outcome; although generally conceptualized as a unitary construct, the most recent literature suggests that these symptoms are heterogeneous and include at least two factors: amotivation and diminished emotional expression. The aim of this study was to analyze the relationships between negative symptoms, social cognition and real-life functioning in people with schizophrenia. Methods: 12 patients with diagnosis of schizophrenia according to ICD-10 criteria were assessed cross-sectionally regarding relevant dimensions to our study: general psychopathology (Positive and Negative Syndrome Scale), social cognition (Face and Emotion Identification Test, Schema Component Sequencing Test - Revised, Social Perception Scale, Ambiguous Intentions and Hostility Questionnaire, Reading the Mind in The Eyes Test), negative symptoms (Clinical Assessment Interview for Negative Symptoms – CAINS) and general functioning (Personal and Social Performance scale – PSP). Spearman correlations were examined and regression and mediation models (Preacher and Hayes bootstrapping methodology) were performed. Results: In our preliminary results, emotion processing was the only social cognition dimension significantly correlated with functioning (rS = .87) and negative symptoms measured by the CAINS: rS = -.78 with amotivation; -.70 with diminished emotional expression and -.78 with total CAINS score (all Po.01). Both amotivation and diminished emotional expression, as well as negative symptoms as a whole, correlated with functioning (rS4.80, Po.01). Emotion processing was a significant predictor of amotivation, diminished emotional expression and total CAINS score (all Beta4-.65, p o.05). Both emotion processing (Beta = .71, P = 0.3) and amotivation (Beta = -.84, P = 0.001) were significant predictors of functioning. Finally, amotivation was found to be a partial mediator of the relationship between emotion processing and functioning (BCA 95% CI = .196 - 7.559). Discussion: Our results are in partial agreement with previous studies suggesting that emotional processing is the most relevant dimension of social cognition to everyday functioning, despite a possible contribution of theory of mind for such impairment in patients with schizophrenia. Regarding negative symptoms, amotivation seems to be the dimension of most relevance to functioning. Altogether, negative symptoms seem to be driven by social cognition deficits and, at least partially, negative symptoms may play a role in the deleterious impact of impaired social cognition on functional outcome. The complexity of the crosstalk between negative symptoms, social cognition and functioning will be better addressed in ongoing studies, as a greater understanding of underlying mechanisms is critical to development of effective treatments