Migrainous infarction: a rare and often overlooked diagnosis

Migraine is a neurological entity and a well-known independent risk factor for cerebral infarction, which mostly afflicts the young female population. Researching focal neurological signs in this subset of the population with the diagnosis of a neurological ischemic event should always take into account the migraine as the etiology or as an associated factor. The etiology of central nervous system (CNS) ischemia is considerable. Migraine, although rare, also may be included in this vast etiological range, which is called migrainous infarction. In this setting, the diagnostic criteria required for this diagnosis is extensive. Herein, we present the case of a female adolescent who submitted to the emergency facility complaining of diplopia, dysarthria, and imbalance, which started concomitantly with a migrainous crisis with aura—a challenging clinical case that required extensive research to address all possible differential diagnose

Sistemas de informação desenvolvidos no âmbito do Programa Aveiro Norte

O propósito deste artigo é o de demonstrar o relevo que os sistemas de informação têm em todo o processo de criação e desenvolvimento de uma nova oferta formativa potenciada pela Universidade de Aveiro no norte do distrito. Inicialmente, e com o intuito de desenvolver ferramentas para a gestão e administração do Programa Aveiro-Norte, criou-se o website do Programa Aveiro-Norte. A sua forte aderência por parte dos vários actores envolvidos na utilização do mesmo sistema, deu origem a novos inputs com vista ao aperfeiçoamento do mesmo, bem como novos sistemas que promovem uma maior interacção com o tecido empresarial da região. Apresentamos, de uma forma sucinta e clara, os vários sistemas em produção e desenvolvimento e como é que interagem no ‘Universo Aveiro-Norte’, dando origem a um portal informativo que promova todas as entidades envolvidas criando um fluxo de informação comum. De salientar, a plataforma Aveiro- Norte, o ABC – Arquivo Bibliográfico para a Produção Científica, o SIEEDV - Sistema de Informação Empresarial Entre o Douro e Vouga e OFEDV – Oferta Formativa de Entre o Douro e Vouga

Migrainous infarction: a rare and often overlooked diagnosis

Migraine is a neurological entity and a well-known independent risk factor for cerebral infarction, which mostly afflicts the young female population. Researching focal neurological signs in this subset of the population with the diagnosis of a neurological ischemic event should always take into account the migraine as the etiology or as an associated factor. The etiology of central nervous system (CNS) ischemia is considerable. Migraine, although rare, also may be included in this vast etiological range, which is called migrainous infarction. In this setting, the diagnostic criteria required for this diagnosis is extensive. Herein, we present the case of a female adolescent who submitted to the emergency facility complaining of diplopia, dysarthria, and imbalance, which started concomitantly with a migrainous crisis with aura—a challenging clinical case that required extensive research to address all possible differential diagnose

Femoral shaft fracture: reproducibility of AO-ASIF and Winquist classifications

OBJECTIVE: To evaluate inter-observer reproducibility of AO / ASIF and Winquist-Hansen classifications for shaft fractures of the femur in adults. METHODS: 50 anterior-posterior and profilelateral radiographs were randomly selected, of adult patients awith diaphyseal fracture of the femur. The radiographs were analyzed by 5 observers-a member of the Brazilian Society of Orthopedic Trauma, a radiologist and 3 residents. To assess the concordance between these classifications, we used the statistical index Kappa (K). RESULTS: In all analyses, we observed a statistically significant correlation coefficient between observers (p <0.05) and according to the criteria of Landis and Koch, they were ranked them as good (values of 0.61 to 0.80) or very good (values above 0.80). CONCLUSION: The AO rating and Winquist present a high rate of concordance between observers for shaft fractures of the femur in adults.OBJETIVO: Avaliar a reprodutibilidade interobservadores das classificações AO/ASIF e de Winquist para as fraturas diafisárias do fêmur no adulto. MÉTODOS: foram selecionadas aleatoriamente 50 radiografias de pacientes adultos portadores de fratura diafisária do fêmur nas incidências em antero-posterior e perfil. As radiografias foram analisadas por 5 observadores, sendo um membro da Sociedade Brasileira de Trauma Ortopédico, um radiologista, um residente do terceiro ano de Ortopedia e Traumatologia, um do segundo e um do primeiro. Para avaliar a concordância interobservadores destas classificações, foi utilizado o índice estatístico Kappa (K). RESULTADOS: Em todas as análises, observou-se um coeficiente de concordância entre observadores estatisticamente significativo (valor p < 0,05) e classificado como bom (valores de 0,61 a 0,80) ou muito bom (valores acima de 0,80), segundo os critérios de Landis e Koch. CONCLUSÃO: As classificações AO e Winquist apresentam alto índice de concordância interobservadores para as fraturas diafisárias do fêmur no adulto.Universidade Federal de Minas Gerais Hospitais Felício Rocho e da Baleia Departamento do Aparelho LocomotorUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de MedicinaHospital Felício Rocho Serviço de Ortopedia e TraumatologiaUniversidade Federal de Minas Gerais Departamento do Aparelho LocomotorUNIFESP, EPMSciEL

Electromagnetic energy harvesting using magnetic levitation architectures: a review

Motion-driven electromagnetic energy harvesters have the ability to provide low-cost and customizable electric powering. They are a well-suited technological solution to autonomously supply a broad range of high-sophisticated devices. This paper presents a detailed review focused on major breakthroughs in the scope of electromagnetic energy harvesting using magnetic levitation architectures. A rigorous analysis of twenty-one design configurations was made to compare their geometric and constructive parameters, optimization methodologies and energy harvesting performances. This review also explores the most relevant models (analytical, semi-analytical, empirical and finite element method) already developed to make intelligible the physical phenomena of their transduction mechanisms. The most relevant approaches to model each physical phenomenon of these transduction mechanisms are highlighted in this paper. Very good agreements were found between experimental and simulation tests with deviations lower than 15%. Moreover, the external motion excitations and electric energy harvesting outputs were also comprehensively compared and critically discussed. Electric power densities up to 8 mW/cm^3 (8 kW/m^3) have already been achieved; for resistive loads, the maximum voltage and current were 43.4 V and 150 mA, respectively, for volumes up to 235 cm^3. Results highlight the potential of these harvesters to convert mechanical energy into electric energy both for large-scale and small-scale applications. Moreover, this paper proposes future research directions towards efficiency maximization and minimization of energy production costs.in publicatio

Acordo inter-juízes: O caso do coeficiente kappa

Sempre que é preciso classificar um conjunto de dados num dado número de categorias, vários tipos de enviesamentos podem ocorrer. Com vista à sua minimização é frequente o recurso a mais do que um juiz para categorizar os mesmos dados, analisando-se posteriormente o seu grau de acordo e consequentemente a fiabilidade da classificação. Entre os vários índices de acordo inter-juízes mencionados na literatura, o coeficiente kappa (Cohen, 1960) é referido como o mais frequentemente utilizado quando as variáveis em estudo são nominais. Neste artigo, procuramos descrever este coeficiente, apresentando a sua definição, pressupostos, fórmula, e ilustrando os passos para o seu cálculo. Exploramos também o seu desenvolvimento para kappa ponderado (Cohen, 1968). Por fim, algumas críticas feitas a este coeficiente de acordo inter- -juízes são sumariamente discutidas. ------ ABSRTACT ------ Whenever one needs to classify a set of data in a given number of categories, several types of biases can occur. In order to minimize them, it’s frequent to recourse to more than one judge to categorize the same data, analyzing afterwards the degree of their agreement and consequently the reliability of the classification. Among the several interrater agreement indexes mentioned in the literature, kappa coefficient (Cohen, 1960) is referred as the most frequently used when variables in study are nominal. In this article, we attempt to describe this coefficient, presenting its definition, assumptions, formula, and illustrating the steps to its calculi. We also explore its development to weighted kappa (Cohen, 1968). Finally, some critiques made to this interrater agreement coefficient are briefly discussed