Talles Marcelo G. de A. Barbosa

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—Usability tests are very important to validate and improve software systems and software development processes. Nowadays, there are different methodologies to software usability evaluation. However, the most effective are based on real user's feedback although these methodologies are time-consuming and very expensive because depend on analysis of many(More)
Advances in digital electronics have enable the development of low-cost, low-power, multifunctional sensor nodes that are small in size and communicate in short distances. These tiny sensor nodes consist of sensing, data processing, and communication components, leverage the idea of Wireless Sensor Networks (WSN) based on collaborative effort of a large(More)
Wireless Sensor Networks (WSN) is an emerging technology that is developed with a large number of useful applications. On the other hand, Artificial Neural Networks (ANN) have found many successful applications in nonlinear system and control, digital communication, pattern recognition, pattern classification, etc. There are many similarities between WSN(More)
Affective Systems have been used in different applications, such as stress monitoring in aircraft seats and managing sensitivity in autism spectrum disorder. Although many scientific progresses have been made there are many computational challenges to be overcome in order to embedded affectivity into traditional user interfaces. For example,(More)
Mobile intelligent clinical monitoring systems provide mobility and out of hospital monitoring. It can be used in the follow-up of high-risk patients in out of hospital situations and to monitor “healthy” persons to prevent medical events. The inherent characteristics of local diagnosis and actuation permit an improvement and advance in the(More)
The heart rate (HR) and its variability, known as Heart Rate Variability (HRV), are indispensable measurements for cardiorespiratory monitoring, recognition and quantification of emotions, detection of abnormalities, and heart disease control. In general, the acquisition systems for HR and HRV require a contact area for sensor's installation and(More)
Body Sensor Networks (BSN) have gained interest in recent years from researches. Several promising prototypes are enabling many healthcare services. Despite of technological developments in sensing and monitoring devices, some issues related to BSN have still to be investigated. For example, information routing requires establishment of multi-hop paths(More)