Sistemas de conversão MT/BT de elevada frequência para aplicações em sistemas de carregamento de veículos elétricos

Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Eletrotécnica – Ramo de EnergiaO aumento das necessidades energéticas mundiais e as restrições de combustíveis fósseis, têm incentivado um aumento no uso de recursos de energia renovável na rede elétrica. Assistimos a um aumento da penetração no mercado de fontes de energia de corrente contínua (DC) e cargas (exemplo, energia eólica/solar fotovoltaica e veículos elétricos). Sabendo que havia necessidade de controlar o trânsito de energia na rede de distribuição. Sabendo que os transformadores passivos são suscetíveis ao deslocamento DC e que não possuem controlabilidade quando empregado em redes inteligentes. Transformadores de estado sólido (Solid State Transformer – SST) são identificados como uma potencial solução para modernizar e harmonizar as redes elétricas de corrente alternada (AC) e corrente contínua (DC), bem como adequado para aplicações para tração e indústria. Esta dissertação foi desenvolvida para partilhar uma visão geral sobre SST, conceitos, topologias, classificação, conversores de energia, seleção de materiais, limitações, aplicações e nomeadamente o uso de SST no carregamento de veículos elétricos. Uma rede de infraestruturas de carregamento para veículos elétricos é essencial para o sucesso da adoção e difusão do veículo elétrico. O veículo elétrico tem-se afirmado como uma das soluções para a mobilidade sustentável que pode contribuir para a independência externa do país face aos combustíveis fósseis e para a redução de emissões de gases de efeito de estufa.The increase in global energy needs and restrictions on fossil fuels, has encouraged an increase in the use of renewable energy resources in the electricity grid. We are seeing an increasing penetration in the market of direct current (DC) energy sources and loads (Example, wind/photovoltaic energy and electric vehicles). Knowing that there was a need to control energy flow in the distribution network. Knowing that passive transformers are susceptible to DC displacement and have no controllability when used in smart grids. Solid State Transformer (SST) are identified as a potential solution to modernize and harmonize alternating current (AC) and direct current (DC) electrical networks, as well as suitable for traction and industry applications. This dissertation was developed to share an overview on SST, concepts, topologies, classification, energy converters, selection of materials, limitations, applications and, in particular, the use of SST in charging electric vehicles. A network of charging infrastructures for electric vehicles is essential for the successful adoption and diffusion of the electric vehicle. The electric vehicle has established itself as one of the solutions for sustainable mobility that can contribute to the country's external independence from fossil fuels and the reduction of greenhouse gas emissions.info:eu-repo/semantics/publishedVersio

Fernando Pessoa e a poética do saudosismo

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Tradição e pluralismo nos escritos filosóficos de Fernando Pessoa

Tese apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em Filosofia - EstéticaA presente dissertação de Doutoramento tem por objecto de estudo os escritos filosóficos de Fernando Pessoa. No espólio de Pessoa existe uma multiplicidade de fragmentos de ensaios, livros, pequenas produções e páginas autónomas de cariz filosófico que este autor não chegou a publicar no decurso da sua vida e que ainda se encontram, em grande parte, inéditos apesar das inúmeras tentativas de dar a conhecer a dimensão filosófica da obra deste poeta e pensador português. Este autor deixou-nos igualmente, entre os escritos do seu espólio, uma multiplicidade de projectos filosóficos e listas com títulos de obras filosóficas por realizar. Deste modo, a escolha do tema Tradição e Pluralismo nos Escritos Filosóficos de Fernando Pessoa é reflexo do objecto de estudo da presente dissertação de doutoramento. Com efeito, Fernando Pessoa não cria um sistema filosófico unitário que incorpore e sintetize a multiplicidade de produções filosóficas correspondentes aos vários projectos e títulos de obras de índole filosófica concebidos por este autor. O pensamento de Fernando Pessoa é um pensamento pluralista e a dimensão pluralista de Pessoa reflecte-se também na sua produção filosófica. O carácter pluralista da produção filosófica de Fernando Pessoa é, por um lado, reflexo da atitude multifacetada desenvolvida ao longo de toda a produção literária deste pensador e, por outro lado, do posicionamento deste pensador perante a tradição filosófica. Com efeito, na Biblioteca Particular de Fernando Pessoa existe uma pluralidade de livros e estudos filosóficos assinados, sublinhados e comentados por este autor. No Espólio de Pessoa existem também extensos resumos e comentários de obras da tradição filosófica. Estes indícios testemunham o contacto de Pessoa com uma multiplicidade de tradições filosóficas, cujo pendor pluralista dos seus escritos filosóficos viria a ser reflexo. Assim, este estudo pretende ser um contributo para o aprofundamento do estudo do alcance filosófico da obra de Fernando Pessoa

Fernando Pessoa Leitor de Pascal e o Projeto do Livro do Desassossego

UID/ELT/00657/2019O presente artigo visa explorar as relações entre Pascal e Pessoa tendo por base o impacto da obra do autor francês tanto na estruturação quanto nas temáticas presentes ao longo do projeto do Livro do Desassossego. Com efeito, na Biblioteca Particular de Pessoa encontramos livros de e sobre Pascal que se encontram sublinhados e anotados pelo autor português e nos possibilitam certificar o interesse de Pessoa pelo pensamento pascaliano. Para além disso, o espólio de Pessoa oferece-nos um conjunto de fragmentos que nos permitem elucidar até que ponto a leitura da obra de Pascal viria a ser importante para a elaboração dos fragmentos do Livro do Desassossego. Assim, tendo por base a análise da presença do nome e do pensamento de Pascal em fragmentos do espólio de Pessoa, o presente artigo explicita qual o papel da leitura pessoana de Pascal na elaboração do projeto do Livro do Desassossegopublishersversionpublishe

Fernando Pessoa leitor de Schopenhauer e o problema do livre-arbítrio

This article aims to elucidate the relation between Fernando Pessoa, Schopenhauer and the problem of free-will, based on the reading that the Portuguese author made of the Schopenhauerian work. Indeed, throughout Pessoa’s writings one finds multiple testimonies of the reading that the Portuguese poet and thinker made of Schopenhauerian thought. An important indication for the study of Pessoa’s reappropriation of Schopenhauer’s thought is found in Fernando Pessoa’s Private Library, where one finds a French translation of Über die Freiheit des menschlichen Willens. The reading of this book would lead to the production of a multiplicity of philosophical writings that Fernando Pessoa attributes to two of his English fictitious literary personalities from the pre-heteronymic universe: Charles Robert Anon and Alexander Search. Thus, based on all these indications, we intend to show the impact of Schopenhauer’s reading on Pessoa’s literary universe.O presente artigo visa elucidar as relações entre Fernando Pessoa, Schopenhauer e a questão do livre arbítrio, tendo por base a leitura que o autor português fez da obra schopenhaueriana. Com efeito, ao longo dos escritos de Pessoa encontramos múltiplos testemunhos da leitura que o poeta e pensador português fez do pensamento schopenhaueriano. Um importante indício para o estudo da reapropriação pessoana do pensamento de Schopenhauer constata-se, desde logo, na Biblioteca Particular de Fernando Pessoa, onde encontramos uma tradução francesa do texto Über die Freiheit des menschlichen Willens [Sobre a liberdade da vontade] de Schopenhauer. A leitura deste livro viria a ocasionar a produção de uma multiplicidade de escritos filosóficos que Fernando Pessoa atribui a duas das suas personalidades literárias fictícias inglesas do universo pré-heteronímico: Charles Robert Anon e Alexander Search. Assim, tendo por base todos estes indícios, pretendemos mostrar o impacto da leitura de Schopenhauer no universo literário pessoano

MAMMALS IN PORTUGAL : A data set of terrestrial, volant, and marine mammal occurrences in P ortugal

Mammals are threatened worldwide, with 26% of all species being includedin the IUCN threatened categories. This overall pattern is primarily associatedwith habitat loss or degradation, and human persecution for terrestrial mam-mals, and pollution, open net fishing, climate change, and prey depletion formarine mammals. Mammals play a key role in maintaining ecosystems func-tionality and resilience, and therefore information on their distribution is cru-cial to delineate and support conservation actions. MAMMALS INPORTUGAL is a publicly available data set compiling unpublishedgeoreferenced occurrence records of 92 terrestrial, volant, and marine mam-mals in mainland Portugal and archipelagos of the Azores and Madeira thatincludes 105,026 data entries between 1873 and 2021 (72% of the data occur-ring in 2000 and 2021). The methods used to collect the data were: live obser-vations/captures (43%), sign surveys (35%), camera trapping (16%),bioacoustics surveys (4%) and radiotracking, and inquiries that represent lessthan 1% of the records. The data set includes 13 types of records: (1) burrowsjsoil moundsjtunnel, (2) capture, (3) colony, (4) dead animaljhairjskullsjjaws, (5) genetic confirmation, (6) inquiries, (7) observation of live animal (8),observation in shelters, (9) photo trappingjvideo, (10) predators dietjpelletsjpine cones/nuts, (11) scatjtrackjditch, (12) telemetry and (13) vocalizationjecholocation. The spatial uncertainty of most records ranges between 0 and100 m (76%). Rodentia (n=31,573) has the highest number of records followedby Chiroptera (n=18,857), Carnivora (n=18,594), Lagomorpha (n=17,496),Cetartiodactyla (n=11,568) and Eulipotyphla (n=7008). The data setincludes records of species classified by the IUCN as threatened(e.g.,Oryctolagus cuniculus[n=12,159],Monachus monachus[n=1,512],andLynx pardinus[n=197]). We believe that this data set may stimulate thepublication of other European countries data sets that would certainly contrib-ute to ecology and conservation-related research, and therefore assisting onthe development of more accurate and tailored conservation managementstrategies for each species. There are no copyright restrictions; please cite thisdata paper when the data are used in publications.info:eu-repo/semantics/publishedVersio

SARS-CoV-2 introductions and early dynamics of the epidemic in Portugal

Genomic surveillance of SARS-CoV-2 in Portugal was rapidly implemented by the National Institute of Health in the early stages of the COVID-19 epidemic, in collaboration with more than 50 laboratories distributed nationwide. Methods By applying recent phylodynamic models that allow integration of individual-based travel history, we reconstructed and characterized the spatio-temporal dynamics of SARSCoV-2 introductions and early dissemination in Portugal. Results We detected at least 277 independent SARS-CoV-2 introductions, mostly from European countries (namely the United Kingdom, Spain, France, Italy, and Switzerland), which were consistent with the countries with the highest connectivity with Portugal. Although most introductions were estimated to have occurred during early March 2020, it is likely that SARS-CoV-2 was silently circulating in Portugal throughout February, before the first cases were confirmed. Conclusions Here we conclude that the earlier implementation of measures could have minimized the number of introductions and subsequent virus expansion in Portugal. This study lays the foundation for genomic epidemiology of SARS-CoV-2 in Portugal, and highlights the need for systematic and geographically-representative genomic surveillance.We gratefully acknowledge to Sara Hill and Nuno Faria (University of Oxford) and Joshua Quick and Nick Loman (University of Birmingham) for kindly providing us with the initial sets of Artic Network primers for NGS; Rafael Mamede (MRamirez team, IMM, Lisbon) for developing and sharing a bioinformatics script for sequence curation (https://github.com/rfm-targa/BioinfUtils); Philippe Lemey (KU Leuven) for providing guidance on the implementation of the phylodynamic models; Joshua L. Cherry (National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health) for providing guidance with the subsampling strategies; and all authors, originating and submitting laboratories who have contributed genome data on GISAID (https://www.gisaid.org/) on which part of this research is based. The opinions expressed in this article are those of the authors and do not reflect the view of the National Institutes of Health, the Department of Health and Human Services, or the United States government. This study is co-funded by Fundação para a Ciência e Tecnologia and Agência de Investigação Clínica e Inovação Biomédica (234_596874175) on behalf of the Research 4 COVID-19 call. Some infrastructural resources used in this study come from the GenomePT project (POCI-01-0145-FEDER-022184), supported by COMPETE 2020 - Operational Programme for Competitiveness and Internationalisation (POCI), Lisboa Portugal Regional Operational Programme (Lisboa2020), Algarve Portugal Regional Operational Programme (CRESC Algarve2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF), and by Fundação para a Ciência e a Tecnologia (FCT).info:eu-repo/semantics/publishedVersio

Mammals in Portugal: a data set of terrestrial, volant, and marine mammal occurrences in Portugal

Mammals are threatened worldwide, with ~26% of all species being included in the IUCN threatened categories. This overall pattern is primarily associated with habitat loss or degradation, and human persecution for terrestrial mammals, and pollution, open net fishing, climate change, and prey depletion for marine mammals. Mammals play a key role in maintaining ecosystems functionality and resilience, and therefore information on their distribution is crucial to delineate and support conservation actions. MAMMALS IN PORTUGAL is a publicly available data set compiling unpublished georeferenced occurrence records of 92 terrestrial, volant, and marine mammals in mainland Portugal and archipelagos of the Azores and Madeira that includes 105,026 data entries between 1873 and 2021 (72% of the data occurring in 2000 and 2021). The methods used to collect the data were: live observations/captures (43%), sign surveys (35%), camera trapping (16%), bioacoustics surveys (4%) and radiotracking, and inquiries that represent less than 1% of the records. The data set includes 13 types of records: (1) burrows | soil mounds | tunnel, (2) capture, (3) colony, (4) dead animal | hair | skulls | jaws, (5) genetic confirmation, (6) inquiries, (7) observation of live animal (8), observation in shelters, (9) photo trapping | video, (10) predators diet | pellets | pine cones/nuts, (11) scat | track | ditch, (12) telemetry and (13) vocalization | echolocation. The spatial uncertainty of most records ranges between 0 and 100 m (76%). Rodentia (n =31,573) has the highest number of records followed by Chiroptera (n = 18,857), Carnivora (n = 18,594), Lagomorpha (n = 17,496), Cetartiodactyla (n = 11,568) and Eulipotyphla (n = 7008). The data set includes records of species classified by the IUCN as threatened (e.g., Oryctolagus cuniculus [n = 12,159], Monachus monachus [n = 1,512], and Lynx pardinus [n = 197]). We believe that this data set may stimulate the publication of other European countries data sets that would certainly contribute to ecology and conservation-related research, and therefore assisting on the development of more accurate and tailored conservation management strategies for each species. There are no copyright restrictions; please cite this data paper when the data are used in publications

Goethe, Spengler e a morfologia da linguagem em Wittgenstein

UID/ELT/00657/2013 SFRH/BPD/121514/2016This article presents the importance of Goethe's and Spengler's morphology for the development of a morphology of language in Wittgenstein's work, after his return to Cambridge and philosophy in 1929. In fact, according to Norman Malcolm's testimony, present in Ludwig Wittgenstein: A memoir, Wittgenstein says, in the course of his lectures about philosophical psychology, which took place between 1946 and 1947, that what his philosophy try to give is the morphology of the use of an expression. The development of a morphology of the use of an expression in Wittgenstein would become the result of the application to the domain of language of the concept of morphology applied by Goethe, in his scientific writings, to the domain of nature and by Oswald Spengler to the field of the universal history, as one sees in the work The Decline of the West - Sketch of a Morphology of the History of the World, which constitutes for Wittgenstein one of the sources to access fundamental aspects of Goethe's morphology. Throughout Wittgenstein's writings one finds several references to the thoughts of Goethe and Spengler which enable us to understand in what extent the works of these two thinkers constitute the basis for the construction of a wittgensteinian morphology of language. Thus, taking all these elements into consideration, we'll try to elucidate to what extent Wittgenstein's morphological-philosophical method after 1929 is the reelaboration of fundamental aspects of the morphological tradition present in the works of Goethe and Spengler.publishersversionpublishe

Resenha de: MARTINS, F. C. Introdução ao Estudo de Fernando Pessoa. Cotia, SP: Ateliê Editora, 2017. 264 p

UID/ELT/00657/2013 SFRH/BPD/121514/2016O presente texto constitui-se como uma resenha do livro Introdução ao Estudo de Fernando Pessoa da autoria de Fernando Cabral Martins, em que se clarifica a importância dessa referência bibliográfica no contexto dos estudos sobre Fernando Pessoa e o modernismo em Portugal.publishersversionpublishe