BACKGROUND Although numerous interventions have been demonstrated to reduce targeted adolescent risk behaviors for brief periods, sustained behavior changes covering multiple risk behaviors have been elusive. OBJECTIVE To determine whether a parental monitoring intervention (Informed Parents and Children Together [ImPACT]) with and without boosters can further reduce adolescent truancy, subst...

Traditional systems for olefin/paraffin separation, like low-temperature distillation, are expensive and very energy consuming, and therefore, alternative separation methods are desired. Facilitated transport membranes are new tools for this separation to be substituted in large scale separation of olefin-paraffin mixtures. To design a membrane process for olefin-paraffin separation, equilibriu...

Blind source separation technique separates mixed signals blindly without any information on the mixing system. In this paper, we have used two evolutionary algorithms, namely, genetic algorithm and particle swarm optimization for blind source separation. In these techniques a novel fitness function that is based on the mutual information and high order statistics is proposed. In order to evalu...

This study sought to analyze, from the point of view educational managers, and based on TOE framework, determinants, boosters, creators barriers adoption implementation information communication technologies within an institution. A qualitative, descriptive, exploratory was conducted, adopting single case as research strategy. The data were collected through interviews, documentary research, di...

The subject of this paper is the study of singular arcs (i.e. with a non maximal thrust) for a space launcher problem. We consider a flight to the GTO orbit for a heavy multi-stage launcher (Ariane 5 class), and use a realistic physical model for the drag force and rocket thrust. As a preliminary result, we first solve the complete flight with stage separations, at full thrust. Then we focus on...

PURPOSE Does the literature support universal vaccination of adolescents and adults, reducing disease incidence in infants and young children? DESIGN & METHODS An extensive literature review and a meta-analysis of four case-control studies, evaluating effects of missed or late vaccine doses, was conducted. RESULTS The literature confirms (a) increasing pertussis rates; (b) adults and adoles...