Medições de longo termo, in situ à superfície, de propriedades ópticas dos aerossóis em Évora, Portuga

Ponencia presentada en: XXXI Jornadas Científicas de la AME y el XI Encuentro Hispano Luso de Meteorología celebrado en Sevilla, del 1 al 3 de marzo de 2010.This work was supported by the Portuguese Fundação para a Ciência e a Tecnologia under grant (SFRH/BD/29008/2006)

Diagnosis of quality problems in a footwear SME

This article presents the results of a study conducted in a footwear SME. The study aimed to characterize the state of quality in the company highlighting weaknesses and areas for improvement. The methodology employed makes use of a set of tools for data collection and analysis such as interviews, flowcharts, process analysis diagrams, efects registry matrix, Failure Modes and Effects Analysis (FMEA) and cause and effect matrix. Based on the gathered data, the company procedures in quality management and the production process performance are described and analyzed. Besides reflecting the quality state in the organization the study also allowed to prioritize the elimination of auses that are responsible for poor performance.FEDER - Programa Operacional Fatores de Competitividade – COMPETE, Projeto FCOMP-01-0124-FEDERFundação para a Ciência e a Tecnologia (FCT

Prediction techniques on FPGA for latency reduction on tactile internet

Tactile Internet (TI) is a new internet paradigm that enables sending touch interaction information and other stimuli, which will lead to new human-to-machine applications. However, TI applications require very low latency between devices, as the system’s latency can result from the communication channel, processing power of local devices, and the complexity of the data processing techniques, among others. Therefore, this work proposes using dedicated hardware-based reconfigurable computing to reduce the latency of prediction techniques applied to TI. Finally, we demonstrate that prediction techniques developed on field-programmable gate array (FPGA) can minimize the impacts caused by delays and loss of information. To validate our proposal, we present a comparison between software and hardware implementations and analyze synthesis results regarding hardware area occupation, throughput, and power consumption. Furthermore, comparisons with state-of-the-art works are presented, showing a significant reduction in power consumption of ≈1300× and reaching speedup rates of up to ≈52×

Cavity effects on the Fermi velocity renormalization in a graphene sheet

Recently, in the literature, it was shown that the logarithmic renormalization of the Fermi velocity in a plane graphene sheet (which, in turn, is related to the Coulombian static potential associated to electrons in the sheet) is inhibited by the presence of a single parallel conducting plate. In the present paper, we investigate the situation of a suspended graphene sheet in a cavity formed by two conducting plates parallel to the sheet. The effect of a cavity on the interaction between electrons in the graphene is not merely the addition of the effects of each plate individually. From this, one can expect that the inhibition of the renormalization of the Fermi velocity generated by a cavity is not a mere addition of the inhibition induced by each single plate. In other words, the simple addition of the result for the inhibition of the renormalization of the Fermi velocity found in the literature for a single plate could not be used to predict the exact behavior of the inhibition for the graphene between two plates. Here, we show that, in fact, this is what happens and calculate how the presence of a cavity formed by two conducting plates parallel to the suspended graphene sheet amplifies, in a non-additive manner, the inhibition of the logarithmic renormalization of the Fermi velocity. In the limits of a single plate and no plates, our formulas recover those found in the literature.This work was partially supported by the following Brazilian Agencies: Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), and Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ). E. C. Marino was partially supported by CNPq and FAPERJ. D. T. Alves was partially supported by CAPES via Programa Estagio Senior no Exterior - Processo 88881.119705/2016-01, by CNPq via Processos 461826/2014-3 (Edital Universal) and 311920/2014-4 (Bolsa de Produtividade em Pesquisa), and also thanks Jaime Santos, Mikhail I. Vasilevskiy, Nuno M. R. Peres and Yuliy Bludov for useful discussions, as well as the hospitality of the Centro de Fisica, Universidade do Minho, Braga - Portugal. V. S. Alves acknowledges CNPq for support through Bolsa de Produtividade em Pesquisa n. 312654/2017-0. The authors also thank Ygor P. Silva for useful comments

Uso de SmartWatch no Auxílio a Monitoração de Arritmias Cardíacas / Usage of SmartWatch to Assist Monitoring of Cardiac Arrhythmias

Doenças cardiovasculares são as que mais matam no mundo, e dentre estas as mais comuns são as arritmias cardíacas. O socorro imediato desses pacientes se faz necessário. Com a popularização dos Smartwatches, esses dispositivos têm se tornado uma ferramenta alternativa para a monitoração desses indivíduos. Assim, o objetivo desse trabalho é auxiliar no monitoramento constante desses pacientes, utilizando um Smartwatch para medir sua frequência cardíaca (FC), e gerando um alerta a um contato de emergência ao detectar alguma anormalidade. Para isso foi desenvolvido o Sistema de Monitoramento de Arritmias Cardíacas que consiste em um Back-end em Node.JS para o desenvolvimento da API e de MongoDB para o banco de dados, e como Front-end um aplicativo Android. Dessa maneira, o sistema possibilita um rápido socorro à indivíduos com arritmia. E ainda gera um histórico de FC enquanto o paciente executa diferentes atividades diárias gerando um diagnóstico mais assertivo

The higher exercise intensity and the presence of allele I of ACE gene elicit a higher post-exercise blood pressure reduction and nitric oxide release in elderly women: an experimental study

<p>Abstract</p> <p>Background</p> <p>The absence of the I allele of the angiotensin converting enzyme (ACE) gene has been associated with higher levels of circulating ACE, lower nitric oxide (NO) release and hypertension. The purposes of this study were to analyze the post-exercise salivary nitrite (NO₂^-) and blood pressure (BP) responses to different exercise intensities in elderly women divided according to their ACE genotype.</p> <p>Methods</p> <p>Participants (n = 30; II/ID = 20 and DD = 10) underwent three experimental sessions: incremental test - IT (15 watts workload increase/3 min) until exhaustion; 20 min exercise 90% anaerobic threshold (90% AT); and 20 min control session without exercise. Volunteers had their BP and NO₂^-measured before and after experimental sessions.</p> <p>Results</p> <p>Despite both intensities showed protective effect on preventing the increase of BP during post-exercise recovery compared to control, post-exercise hypotension and increased NO₂^-release was observed only for carriers of the I allele (p < 0.05).</p> <p>Conclusion</p> <p>Genotypes of the ACE gene may exert a role in post-exercise NO release and BP response.</p