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Browsing by Issue Date, starting with "2016-04-08"

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  • Infografia: espaço de literacia em contexto de necessidades educativas especiais
    Publication . Silva, Ana Isabel; Pereira, Filipa
    Ainda que comummente associada ao jornalismo, a infografia atualiza potencialidades que pensamos redimensionar para diversos contextos educativos, incluindo a educação especial. Nesta comunicação descrevemos a infografia como uma ferramenta ao serviço da literacia, pelo cariz facilitador da compreensão das mensagens escritas. Propomos cartografar a utilização desta ferramenta ao serviço de crianças e jovens com necessidade educativas especiais, promovendo a literacia visual. A partir da análise de documentos reguladores da ação docente, de instrumentos e recursos didáticos à disposição de professores, descrevemos a pertinência da utilização da infografia para e com estes públicos. Paralelamente, propomos, neste âmbito, caracterizar e avaliar o impacto da utilização da infografia na compreensão de conteúdos escolares em diferentes anos de escolaridade.
    2016-04-08Conference object Open access Show more
  • Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
    Publication . Fernandes, Paulo; Pereira, S. R.; Bandeira, J. M.; Vasconcelos, Luís; Bastos Silva, Ana
    This paper addresses the impact of turbo-roundabouts located in urban areas on pollutant emissions using field measurements of vehicle activity data and road congestion levels. The research also compares the emissions of vehicles moving along a turbo-roundabout and a conventional multi-lane roundabout. Based on field measurements taken at turbo-roundabouts without curb dividers located in Grado (Spain) and multi-lane roundabouts in Aveiro (Portugal), three representative speed profiles for each speed trajectory were identified: no stop (I), stop once (II), and multiple stops (III). This study also develops discrete models for turbo-roundabouts and multi-lane roundabouts in which the relative occurrence of those speed profiles is expressed as a function of the entry and conflicting traffic flows. The Vehicle Specific Power (VSP) methodology is then employed to estimate second-by-second pollutant emissions. This study tests the hypotheses that emissions are impacted by the differences in: 1) the characteristics of speed profiles in each movement; 2) the volumes of entry and conflicting flows; 3) the overall saturation level; and 4) the transportation facility considered (turbo-roundabout /multi-lane roundabout). Considering the selected case studies and traffic demands, vehicles at turbo-roundabouts generated more emissions (15-22%, depending on the pollutant) than multi-lane conventional roundabouts, especially under medium and high congested levels. These findings suggest that there are no advantages in implementing turbo-roundabouts from an environmental point of view, even in no saturated conditions.
    2016-04-08Journal article Restricted access Show more