Analysis of a Sorter Cascade Applied to Control a Wheelchair

The precise eye state detection is a fundamental stage for various activities that require human-machine interaction (HMI). This chapter presents an analysis of the implementation of a system for navigating a wheelchair with automation (CRA), based on facial expressions, especially eyes closed using a Haar cascade classifier (HCC). Aimed at people with locomotor disability of the upper and lower limbs, the state detection was based on two steps: the capture of the image, which concentrates on the detection actions and image optimization; actions of the chair, which interprets the data capture and sends the action to the chair. The results showed that the model has excellent accuracy in identification with robust performance in recognizing eyes closed, bypassing well occlusion issues and lighting with about 98% accuracy. The application of the model in the simulations opens the implementation and marriage opportunity with the chair sensor universe aiming a safe and efficient navigation to the user

Utilização da simulação computacional na verificação da cooperação de uma população em um ambiente simulado = Use of computer simulation to verify the cooperation of a population in a simulated environment

En el presente artículo realizamos un análisisde comportamientos de cooperación enambiente simulado. El presente estudio tienecomo finalidad observar los resultados de la interacciónde los caracteres egoísta, vengativo yaltruista en constante interacción a lo largo degeneraciones. Durante el proceso se desarrollaronalgoritmos que emulan una de las aplicacionesde la teoría de los juegos, el dilemadel prisionero y otro que utiliza la forma en quelos autómatas móviles se mueven-sedientosde una malla virtual. La contribución que conseguimoses dar un valor porcentual máximo auna población aceptada con carácter egoísta yverificar que los caracteres vengativo y altruistatienen un tiempo de vida muy próximo

Modellus: Animações Interativas Mediando a Aprendizagem Significativa dos Conceitos de Física no Ensino Médio

As dificuldades que alunos do ensino médio possuem na aprendizagem dos conceitos da Física são conhecidas. A utilização de métodos tradicionais de ensino e ausência de meios pedagógicos modernos constituem-se razões deste problema. Neste artigo, apresentamos quatro animções interativas, desenvolvidas em um ambiente virtual de aprendizagem computacional. Utilizamos o software Modellus como ferramenta mediadora da aprendizagemsignificativa dos conceitos de Física, com os alunos do ensino médio do Colégio Militar de Salvador. A criação do Laboratório Virtual e impacto das simulações no ensino/aprendizagem foram representadas em gráficos, estes baseados em um questionário respondido pelos alunos, durante as atividades

The amygdala lesioning due to status epilepticus – Changes in mechanisms controlling chloride homeostasis

Objective: Amygdala has been demonstrated as one of the brain sites involved in the control of cardiorespiratory functioning. The structural and physiological alterations induced by epileptic activity are also present in the amygdala and reflect functional changes that may be directly associated with a sudden unexpected death. Seizures are always associated with neuronal damage and changes in the expression of cation-chloride cotransporters and Na/K pumps. In this study, the authors aimed to investigate if these changes are present in the amygdala after induction of status epilepticus with pilocarpine, which may be directly correlated with Sudden Unexpected Death in Epilepsy (SUDEP). Methods: Pilocarpine-treated wistar rats 60 days after Status Epilepticus (SE) were compared with control rats. Amygdala nuclei of brain slices immunostained for NKCC1, KCC2 and α1-Na+/K+-ATPase, were quantified by optical densitometry. Results: The amygdaloid complex of the animals submitted to SE had no significant difference in the NKCC1 immunoreactivity, but KCC2 immunoreactivity reduced drastically in the peri-somatic sites and in the dendritic-like processes. The α1-Na+/K+-ATPase peri-somatic immunoreactivity was intense in the rats submitted to pilocarpine SE when compared with control rats. The pilocarpine SE also promoted intense GFAP staining, specifically in the basolateral and baso-medial nuclei with astrogliosis and cellular debris deposition. Interpretation: The findings revealed that SE induces lesion changes in the expression of KCC2 and α1-Na+/K+-ATPase meaning intense change in the chloride regulation in the amygdaloid complex. These changes may contribute to cardiorespiratory dysfunction leading to SUDEP

Comparative Analysis between Hydrous Ethanol and Gasoline C Pricing in Brazilian Retail Market

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