Jefferson Morais

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The mechanisms of action of physical agents commonly used to treat skeletal muscle lesions are not well understood. In this study, we examined whether the modulation of oxidative stress is involved in the beneficial effects of cold and heat on gastrocnemius muscle strain injury. Adult male Wistar rats were submitted to a strain injury and treated with(More)
Cognitive radio (CR) is a novel technology that allows to improve spectrum utilization by enabling opportunistic access to the licensed spectrum band by unlicensed users [2]. This is accomplished through heterogeneous architectures and techniques of dynamic spectrum access. The CR is defined as an intelligent wireless communication system that is aware of(More)
Data mining can play a fundamental role in modern power systems. However, the companies in this area still face several difficulties to benefit from data mining. A major problem is to extract useful information from the currently available non-labeled digitized time series. This work focuses on automatic classification of faults in transmission lines. These(More)
The growth of available data in the electric power industry motivates the adoption of data mining techniques. However, the companies in this area still face several difficulties to benefit from data mining. One of the reasons is that mining power systems data is an interdisciplinary task. Typically, electrical and computer engineers (or scientists) need to(More)
With increasingly environmental constraints the modern Power and Energy Systems are experiencing huge transformations in many ways. The quantum of data in power systems is growing rapidly due to large database used by power systems engineers for various operations. From the power generation plants the electrical energy is transmitted and distributed to end(More)
This work discusses the integration of available technologies for developing spoken dialog systems in Brazilian Portuguese. As a proof-of-concept, it describes a system for non-visual and on-line Web search on Windows.The prototype system is based on Microsoft's Speech Application Programming Interface (SAPI), which provides an interface that allows the(More)
Data mining can play a fundamental role in modern power systems. However, a major problem is to extract useful information from the currently available non-labeled digitized time series. This work proposes a new methodology based on hierarchical clustering for labeling faults that occurred in transmission lines. A graphical user interface can benefit from(More)
Recently, there has been an increasing proliferation in wearable health monitoring devices, enabling to seamless access multiple sources of physiological data, providing professionals with a continuous, global and reliable view of the patient’s status. However, as the growing number of physiological signals become available, new methodologies, able to(More)
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