Esquisso: entre a observação e a imaginação

A partir do título do Encontro: Processos são realizados alguns acessos ao estudo que se tem desenvolvido sobre Esquisso, procurando estabelecer relações entre a sua especificidade modal no desenho e os processos de observação e imaginação conhecidos.info:eu-repo/semantics/publishedVersio

Battery Pack Cells Mon itoring for Intelligent Charging

This dissertation intends to create a system capable of cell charging, cell balancing or both at the same time for batteries with multiple cells connected in series. It also tries to understand why there is only few literature connected with cell balancing and cell charging at the same time. For that purpose, this dissertation presents a review on the state of the art of many concepts related both to balancing and charging in order to pick the right methods and equipment to achieve the objectives of this work. This dissertation includes literature review on batteries, cell balancing methods and topologies, cell charging methods and a small review on state of charge estimation methods. Later on, this document studies and explains hardware and software requirements and choices in order to understand the final developed circuit. Lastly, development difficulties, results and conclusions are presented.Esta dissertação pretende criar um sistema capaz de carregar, balancear ou ambos em simultâneo num pack com diversas células ligadas em série. Tenta ainda perceber a razão de haver tão pouca bibliografia que junte em simultâneo carregamento e balanceamento de baterias. Para alcançar estes objetivos, esta dissertação conta com uma revisão do estado da arte de vários temas relacionados tanto com balanceamento como com carregamento de forma a perceber os métodos e equipamentos mais adequados para implementar. A dissertação inclui revisão bibliográfica em baterias, métodos de balanceamento e suas topologias, métodos de carregamento de baterias e ainda alguma revisão sobre métodos de estimação de estado de carga. Posteriormente, este documento estuda e explica os requisitos de software e hardware e as escolhas feitas para o desenvolvimento do circuito. Finalmente apresentam-se as dificuldades de desenvolvimento encontradas, os resultados e ainda algumas conclusões

eABC: scientific publications bibliografic archive

The paper intends to present eABC – Scientific Publications Bibliographic Archive of University of Aveiro’. It describes the motivation that induced its implementation, advantages for users and for all those whom the system serves. Some of the systems functionalities will be presented, along with a description on how to use them. Finally, the current status of the system - as it is being used by the University of Aveiro - will be presented, with the addition of an explanation on how this system helps in the creation of mechanisms that enable the adaptability and flexibility of systems to improve the scientific community dynamics

Causal characterization of functional connectivity through the spread of electrically induced oscillations in the epileptic human brain

Little is known about the rules governing the spread of local entrainment within synchronized networks distributed across the brain. The assessment of the causal influences impacting information flow between two brain regions have mainly relied on confirmatory model-driven approaches (such as dynamic causal modeling and structural equation modeling) and exploratory data driven approaches (such as Granger Causality analysis). However, stimulation-driven approaches offer a unique opportunity to impact ongoing brain activity and describe the causal consequences of such manipulations, performed on a specific node of a complex cerebral network. In this project, we characterize causal functional interactions between brain regions by assessing how frequency-tuned electrical currents delivered intracranially in awaken epileptic patients enhance inter-regional synchrony between pairs of areas. To achieve this goal, we worked with an existing iEEG database from 18 medication-resistant epilepsy patients undergoing Intracortical Stimulation Mapping Procedures (ISMP) performed to causally identify and localize the epileptogenic foci, prior to neurosurgical removal. Patients are implanted with series of multi-electrodes in well-known brain regions under MRI guidance. Intracranial EEG contacts allow continuous recordings and the delivery through pairs of adjacent contacts of biphasic pulses of rhythmic Direct Electric Stimulations (DES) at a 50Hz frequency coupled to electrophysiological recordings. Measuring significant increases in gamma power ( 50Hz) observed during the stimulation period (vs. prior the stimulation), and significant increases of Phase-Locking Value (PLV) between signals recorded in the electrically stimulated regions and activity evoked in the rest of implanted regions during stimulation (vs. prior simulation), we characterize the spread of oscillatory entrainment from the stimulated region to the remaining regions, thus establishing a network of functional connectivity in the brain. By comparing this network with the one shown during resting-state, we assess how entrainment to frequency-tuned electrical currents delivered intracranially is predicted by the resting-state functional connectivity network

Learning roadmaps for Higher Education

An integrated platform for the support of teaching activities as been developed and deployed at the Aveiro Norte Polytechnic School of the University of Aveiro. In this paper we present an approach to Learning Roadmaps for Higher Education based on this platform. The aprend.e platform – Electronic Integrated System for Learning and Training - has at its core a Learning Management System with a number of plugins. It represents a new challenge for the University of Aveiro for higher education and is already being at its core is the concept of learning roadmaps that act upon two fundamental axes: education and learning. For the teachers, it aims at becoming a self-supporting tool that stimulates the organization and management of the course materials (lectures, presentations, multimedia content, and evaluation materials, amongst others). For the students, the learning roadmap aims at promoting self-study and supervised study, endowing the pupil with the capabilities to find the relevant information and to capture the concepts in the study materials. The outcome will be a stimulating learning process together with an organized management of those materials

Climatização Geosolar em Moura

Neste artigo faz-se a descrição de conceitos subjacentes ao sistema de climatização geosolar aplicado no novo edifício da Lógica, E.M. em Moura, incluindo-se fundamentação teórica, aspetos preditivos de funcionamento, descrição técnica, considerações quanto aos custos e sustentabilidade, e, enquadramento ao abrigo do SCE. Trata-se de um sistema de AVAC Carbono Zero, ideal para aplicação em várias latitudes, nomedamente as de Portugal Continental. Como principais conclusões deve referir-se que é possível obter uma solução deste tipo com um custo global da ordem de grandeza do de sistemas de AVAC de elevada qualidade o que significará que as poupanças dos custos com energia começam a ser sentidas desde o primeiro dia de utilização. Tornou-se ainda possível que um edifício de serviços que estaria naturalmente abrangido pelo RSECE, seja tratado ao nível do RCCTE

Prova de esforço cardiopulmonar em doentes com terapêutica de ressincronização cardíaca: que parâmetros ergométricos valorizar?

Trabalho final de mestrado integrado em Medicina (Cardiologia), apresentado à Faculdade de Medicina da Universidade de Coimbra.Introdução: Apesar da maioria dos doentes apresentar sucesso terapêutico à terapia de ressincronização cardíaca (TRC), 30 a 35% não respondem ao pacing. Não é consensual qual será o melhor critério para avaliar a resposta à TRC. A prova de esforço cardiopulmonar (PECP) permite uma apreciação objetiva da capacidade funcional e da resposta ventilatória, cardíaca e metabólica ao esforço. Objetivos: Descrever e caracterizar variáveis ergométricas obtidas na PECP numa população de doentes portadores de TRC, avaliar a associação entre essas variáveis após a implantação da TRC e as várias definições de resposta dos doentes à TRC e analisar a relação entre a resposta à TRC com a mortalidade e a realização de transplante cardíaco. Métodos: Setenta e nove doentes portadores de TRC submetidos a PECP após a implantação do dispositivo. Uma diminuição ≥1 classe funcional NYHA definiu os responders clínicos; um aumento ≥ 25% na FEVE definiu os responders ecocardiográficos. Foram avaliados parâmetros demográficos, electrocardiográficos, ecocardiográficos, clínicos pré e pós-TRC e ergométricos pós-TRC. Foi realizado um estudo estatístico para analisar a associação entre as variáveis pré e pós-TRC, estudando as suas diferenças de acordo com a resposta à terapia em estudo, bem como a sua capacidade como preditores de resposta à TRC. Resultados: Houve 65,6% de responders clínicos e 40,5% de responders ecocardiográficos. Observaram-se diferenças estatisticamente significativas entre responders e não responders clínicos na tolerância ao exercício (pico de VO2 de 17,9 ± 5,1 mL.kg-1.min-1 versus 14,8 ± 5,0 mL.kg-1.min-1 (p=0,022); declive de VE/VCO2 de 23,7 ± 15,5 versus 36,1 ± 17,1 (p=0,009); pulso de O2 de 12,0 ± 3,3 versus 10,0 ± 3,3 (p=0,025)); observaram-se diferenças relevantes na taxa de mortalidade durante o seguimento entre os dois subgrupos (4,8% versus 18,2%, p=0,080). Verificou-se que a VE/VCO2 prediz melhor a resposta à TRC, independentemente dos critérios adotados na definição de resposta (0,754 (p=0,007) e 0,790 (p=0,001)). O pulso de O2 e o pico de VO2 apresentam áreas sobre as curvas ROC inferiores (0,726 e 0,740 versus 0,708 e 0,693, respetivamente). O VO2 basal apresentou-se como o melhor preditor de mortalidade (0,784 (p=0,025)). O pico de VO2 apresentou-se como o melhor preditor para transplante cardíaco (0,688 (p=0,030)). Conclusões: O pico de VO2 e o índice de eficiência respiratória VE/VCO2 estão intimamente associados à resposta clínica e ecocardiográfica à TRC, com valores mais favoráveis nos doentes com resposta à TRC.Background: Although most of the patients treated with cardiac resynchronization therapy (CRT) respond to the therapy, 30 to 35% do not experience clinical improvement. The best criteria to evaluate response remain controversial. The cardiopulmonary exercise testing (CPX) allows an objective analysis of the functional, ventilator, cardiac and metabolic response during effort. Objectives: Analyze and characterize ergometric variables obtained during CPX in a population of patients with CRT, evaluate the association of those variables after CRT implantation with the definition of response and analyze the association between the response to CRT with mortality and heart transplant. Methods: Seventy nine patients with CRT who underwent CPX were studied. An improvement of ≥1 NYHA class defined clinical responders; a ≥25% improvement in left ventricular ejection fraction (LVEF) identified echocardiographic responders. We evaluated demographic, electrocardiographic, echocardiographic and clinical parameters before and after CTR implantation, as well as ergometric parameters after TRC implantation. It was made a statistical study to analyze the association between variables before and after TRC, studying their differences according to the response definitions and their ability to predict response to CRT. Results: There were 65,6% clinical responders and 40,5% echocardiographic responders. The differences observed in exercise tolerance between clinical responders and non responders were statistically significant (peak VO2 of 17,9 ± 5,1 mL.kg-1.min-1 versus 14,8 ± 5,0 mL.kg-1.min-1 (p=0,022); VE/VCO2 slope of 23,7 ± 15,5 versus 36,1 ± 17,1 (p=0,009); O2 pulse of 12,0 ± 3,3 versus 10,0 ± 3,3 (p=0,025)); there were observed important differences in mortality between both subgroups. (4,8% versus 18,2%, p=0,080). VE/VCO2 slope was the best to predict response to CRT, independently of the definition of response used (0,754 (p=0,007) e 0,790 (p=0,001)). O2 pulse and peak VO2 presented inferiors areas under the ROC curves (0,726 e 0,740 versus 0,708 e 0,693, respectively). Base VO2 was the best mortality predictor (0,784 (p=0,025)). Peak VO2 was the best predictor for the evaluation of patient’s need of heart transplant. (0,688 (p=0,030)). Conclusion: Peak VO2 and VE/VCO2 slope are inwardly associated with clinical and ecocardiographic response to CRT, with more favorable values on responders to CRT

The Portuguese justice in the Middle Ages (An inventory of doubts)

Presentamos los interrogantes principales que subsisten hoy en día sobre el funcionamiento concreto del sistema judicial portugués en la Edad Media tardía. Partimos de la duda acerca de la efectividad de las normas jurídicas (en especial, las Ordenaçôes Afonsinas), para preguntarnos sobre las justicias señoriales laicas, los conflictos o cooperación de éstas con las justicias reales, las justicias eclesiásticas, pensando de nuevo el binomio oposición-complementariedad, y las justicias locales, con una especial atención a los jueces (perfil y preparación cultural y jurídica). Resta una pregunta final sobre las relaciones entre estos varios universos jurídicos y la certeza de la evolución no lineal de este mundo.This paper tries to raise some of the main questions about the way of the portuguese judicial system worked in the Late Middle Ages. The first one concerns the effectiveness of the laws (specially the Ordenações Afonsinas). Then we examine the lay landlord's justice, the conflicts and cooperation between that and the king's justice, the ecclesiastical justice, trying again to establish the part of the oppositions and the part of complementarities, to end with the local justice and in particular the local judges ­ their profile, their cultural and juridical preparation. A last question regards the relations between those different judicial systems and the non linear evolution of the whole judicial world