https://hdl.handle.net/10216/1882 Sat, 08 Aug 2026 02:52:39 GMT 2026-08-08T02:52:39Z https://hdl.handle.net/10216/93185 Title: Blood flow study in a stenosed carotid bifurcation Abstract: The goal of this work is the use of anatomically realistic blood flow simulations by the finite element method derived from in vivo medical imaging to obtain patient-specific flow phenomena associated with the atherosclerosis disease. A good agreement between ultrasound imaging data and computational simulated results was achieved. Tue, 01 Jan 2013 00:00:00 GMT https://hdl.handle.net/10216/93185 2013-01-01T00:00:00Z https://hdl.handle.net/10216/93618 Title: Visualização e quantificação da estenose carotídea usando imagens de ultrassonografia Description: Neste trabalho apresenta-se o desenvolvimento de uma metodologia de análise das condições hemodinâmicas da bifurcação carotídea baseada em imagens de ultrassonografia hospitalar. A aplicação de uma técnica de segmentação semiautomática de imagens em modo B permite a construção do modelo 3D da bifurcação e quantificação do grau de estenose. A partir das imagens Doppler em modo PW deduzem-se as restantes condições necessárias à análise hemodinâmica. A metodologia é exemplificada com dados de um utente hospitalar com doença carotídea Thu, 01 Jan 2015 00:00:00 GMT https://hdl.handle.net/10216/93618 2015-01-01T00:00:00Z https://hdl.handle.net/10216/140450 Title: Obesity is Associated with sympathetic nervous Activation in school Aged Children Wed, 01 Jan 2020 00:00:00 GMT https://hdl.handle.net/10216/140450 2020-01-01T00:00:00Z https://hdl.handle.net/10216/140504 Title: Alterações do perfil lipídico em crianças e adolescentes infetados com VIH submetidos a terapêutica antirretrovírica de grande eficácia Tue, 01 Jan 2019 00:00:00 GMT https://hdl.handle.net/10216/140504 2019-01-01T00:00:00Z https://hdl.handle.net/10216/97729 Title: Simulação ótima da hemodinâmica da carótida baseada em imagens de ultrassonografia Description: Os sistemas de ultrassonografia permitem investigar as condições hemodinâmicas da bifurcação carotídea. Neste trabalho as imagens de ultrassonografia das carótidas são analisadas exaustivamente permitindo a utilização de uma metodologia de redes neuronais artificiais capaz de simular o fluxo nas artérias carótidas ao longo do eixo carotídeo. A metodologia enquadra-se na pesquisa de parâmetros objetivos capazes de separar comportamentos hemodinâmicos diferentes para diversos graus de severidade da doença carotídea. Thu, 01 Jan 2015 00:00:00 GMT https://hdl.handle.net/10216/97729 2015-01-01T00:00:00Z https://hdl.handle.net/10216/89104 Title: ENFARTE AGUDO DO MIOCÁRDIO APÓS REPARAÇÃO ENDOVASCULAR DE ANEURISMAS DA AORTA ABDOMINAL Tue, 01 Mar 2016 00:00:00 GMT https://hdl.handle.net/10216/89104 2016-03-01T00:00:00Z https://hdl.handle.net/10216/79710 Title: Intermittent connection effect in the Message Ferry Delay Tolerant Network Abstract: Delay Tolerant Networks (DTN) give a base of communication that permits the delivery of data within harsh environments or even between networks without interconnection. The connection between networks happens when some nodes cross between them and carry information. Our model consists of the Message Ferry Mobility Model (MFMM) where all nodes in the network are confined to their village except one mobile node (the message ferry). In order to reduce the energy consumption the wireless interface is not always on. We aim to study how much does the on/off state of the wireless interface reduces the total connection time available in the MFMM. To answer this question, we created a simulator that uses the MFMM. The simulator generated mobility traces of all nodes and measured the contact time under different patterns of the on/off cycle. As expected the contact time are longer when the interface is active more often. However we found an unanticipated reduction in contact time vs active wireless interface ratio. Hence, we concluded that in the MFMM, the on/off duty-cycle of the wireless interface influences the total contact times. Sat, 01 Jan 2011 00:00:00 GMT https://hdl.handle.net/10216/79710 2011-01-01T00:00:00Z https://hdl.handle.net/10216/115423 Title: Stenosis near carotid artery bifurcation investigated by fluid dynamic analyses Sun, 01 Jan 2017 00:00:00 GMT https://hdl.handle.net/10216/115423 2017-01-01T00:00:00Z https://hdl.handle.net/10216/85666 Title: RetinaCAD - retinal computer-aided diagnosis system Abstract: This paper presents an automatic application that provides several retinalimage analysis functionalities, namely vessel segmentation, vesselwidth estimation, artery/vein classification and optic disc segmentation. Apipeline of these methods allows the computation of important vessel relatedindexes, namely the Central Retinal Arteriolar Equivalent (CRAE),Central Retinal Venular Equivalent (CRVE) and Arteriolar-to-Venular Ratio(AVR), as well as various geometrical features associated with vesselbifurcations Wed, 01 Jan 2014 00:00:00 GMT https://hdl.handle.net/10216/85666 2014-01-01T00:00:00Z