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This paper presents a new fault-tolerant clock synchronization algorithm designed for the Controller Area Network (CAN

Resumo Introdução A dengue é considerada um problema de saúde pública. O município de Ribeirão Preto possui condições climáticas e geográficas favoráveis à proliferação do Aedes aegypti , sendo reportadas altas taxas de incidência de dengue. Objetivo Avaliar a relação entre a precipitação pluviométrica e a incidência de casos confirmados de dengue. Método Foi utilizado o coeficiente de correlação de Spearman para a análise da relação entre a pluviosidade e a incidência de dengue. Resultados Encontrou-se associação entre a precipitação e os casos de dengue, com p < 0,01, considerando um intervalo de defasagem (time lag ) que ocorre a partir do primeiro mês e se estende até o quinto mês. Conclusão Estudos como este contribuem para o conhecimento sobre a influência de fatores climáticos na incidência e na dinâmica de transmissão da dengue, sendo essenciais para auxiliar os gestores na tomada de decisão para a prevenção e o controle da doença.

The programming teaching faces serious challenges all over the world. Many students end up abandoning the Computer Science courses in their freshman years because they are not able to understand the concepts taught in introductory courses. On the other hand, the development of games is an opportunity for the students to perform an actual activity of the career and hence it may serve as an incentive to their motivation, commitment, and proactivity. This article describes a teaching approach based on the Problem Based Learning (PBL) methodology, which is associated to the development of educational games to drive the programming teaching in an introductory and practical course of programming teaching. The article presents details on the approach and how it was conducted in a case study with 30 students. The article also comprehends the approach's assessment, as well as the results got through the evaluation survey with students and teachers.

Augmented reality applications merge virtual content with the real world, with real-time interaction and they have inherent characteristic, such as the lighting conditions, use of sensors, and the user position. These applications are very different from conventional applications that use mouse and keyboard, so they require a usability evaluation to verify whether they achieve their goals and satisfy users. We developed a checklist to measure the usability of augmented reality applications in a practical manner. This checklist was developed adapting the ISO 9241-11 and Nielsen Heuristics for an augmented reality context, and criteria created by us. Five experts evaluated two applications to test the checklist. In both cases, the evaluation clearly identified key problems in the application design. They also evaluated the checklist. Analyzing the results, we could determine that the checklist appears to be a possible solution to evaluate usability of augmented reality applications.

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Background: Neuroimaging studies are an invaluable source of information about the physiopathology of schizophrenia. Arterial spin labeling (ASL) is a new magnetic resonance technique (MRI) that is able to effectively evaluate brain function without the use of radiation. Objective: To make a systematic review of studies using ASL to compare resting-state regional cerebral blood flow (rCBF) patterns in patients with schizophrenia and healthy controls. Methods: Original articles were searched for on PubMed, Scopus, Web of Science and PsycINFO electronic databases. The search terms used were 'arterial' , 'spin' , 'labeling' , and 'schizophrenia' . Only studies comparing resting-state rCBF were included, a qualitative synthesis was then performed. Results: Ten articles were included in the review among a total of 22. Decreased rCBF in schizophrenia patients was described in the anterior cingulate, cuneus, fusiform gyrus, frontal lobe, left middle frontal gyrus, inferior frontal gyrus, lingual gyrus, middle occipital gyrus, and parietal lobe. The putamen was the only region with increased rCBF in schizophrenia. Discussion: The evidence of the studies reviewed lends support to the concept of hipofrontality in schizophrenia. rCBF alterations were found in regions classically associated with schizophrenia. ASL seems to be valid, and reliable tool to assess schizophrenia.