D. Coutinho

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I T is well-established that numerous problems in control systems involve the use of positive polynomials, i.e., multi-variate polynomials that take only positive values over a domain of interest. Indeed, constraint satisfaction is equivalent to the positivity of a suitable function, as well as performance computation amounts to determining the best(More)
This paper presents a behavioral model of a delay-locked loop (DLL) used to generate the timing signals in an integrated ultra wide-band (UWB) impulse radio (IR) system. The requirements of these timing signals in the context of UWB-IR systems are reviewed. The behavioral model includes a modeling of the various noise sources in the DLL that produce output(More)
This study aims to describe the time-motion and physiological performance profiles of footballers whose ages are under 15 (U15), under 17 (U17), and under 19 (U19) during a typical week of a competitive season. A total of 151 elite Portuguese players U15 (age 14.0 ± 0.2; n = 56), U17 (age 15.8 ± 0.4; n = 66), and U19 (age 17.8 ± 0.6; n = 19) were monitored(More)
Contemporary techno-scientific and medical developments are restructuring social interactions and the very processes by which individual subjectivity is formed. This essay elaborates on the experiential and ethical impact of such transformations from the perspective of people who, in ordinary and unexpected ways, act science and technology out. We carried(More)
Understanding how youth football players base their game interactions may constitute a solid criterion for fine-tuning the training process and, ultimately, to achieve better individual and team performances during competition. The present study aims to explore how passing networks and positioning variables can be linked to the match outcome in youth elite(More)
OBJECTIVE Analyze the implementation of drug price regulation policy by the Drug Market Regulation Chamber. METHODS This is an interview-based study, which was undertaken in 2012, using semi-structured questionnaires with social actors from the pharmaceutical market, the pharmaceuticals industry, consumers and the regulatory agency. In addition, drug(More)
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