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BACKGROUND This study examines associations between perceptions of neighbourhood environment and physical activity and sports within Portuguese adolescents. METHODS The sample consisted of 4,877 individuals of both genders, with an average age of 14 years. The instrument used was the Health Behavior School-aged Children questionnaire. RESULTS(More)
In a blended education context, Learning Management Systems (LMS) can be thought to integrate collaborative and interactive learning activities; this, however, requires a strong institutional and sociocultural commitment from all stakeholders. Consequently, an empirical study that aims at identifying learners' profiles and uses them as an optimization(More)
  • Marcus A Pereira, José A Diniz, Ioshiaki Doi, Jacobus W Swart
  • 2003
For LOCOS application, silicon nitride (SiN x) insulators have been deposited by ECR–CVD at room temperature and with N 2 flows of 2.5, 5, 10 and 20 sccm on pad-SiO 2 /Si or on Si substrates. The obtained SiN x /Si structures were used to analyze the SiN x characteristics. FTIR analyses reveal the presence of Si–N and N–H bonds. The refractive indexes(More)
The study examines the impact of body image in adolescents' well-being. Well-being was assessed with the scale Kidscreen10, with the Cantril ladder for satisfaction with life and with an ad hoc happiness scale. The study presents data on adolescent health from the Health Behavior in School-aged Children (HBSC)/World Health Organization study in Portugal(More)