Browsing by Author "Ferreira, A."
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- Air and Underwater Survey of water enclosed spaces for VAMOS! ProjectPublication . Almeida, J.; Ferreira, A.; Matias, B.; Dias, A.; Martins, A.; Silva, F; Oliveira, J.; Sousa, P.; Moreira, M.; Miranda, T.; Almeida, C.; Silva, E.This paper addresses a three-dimensional (3D) reconstruction of a flooded open pit mine with an autonomous surface vehicle (ASV) and unmanned aerial vehicle (UAV). The ROAZ USV and the Otus UAV were used to provide the underwater bathymetric map and aerial 3D reconstruction based from image data. This work was performed wihtin the context of the European researcj project VAMOS with the objective of developing robotic tools for efficient underwater mining
- Influence of an exercise program in the peroneal reaction timePublication . Ferreira, A.; Monteiro, P.; Carvalho, Paulo; Moreira, CamiloSoccer is the most popular sport in the world and has characteristics which led to high incidence of injuries, which motivate FIFA to develop a program for injury prevention. The peroneal reaction time plays an important role in the prevention of the inversion movement in ankle injuries. This study’s main goal is to verify if such a program promotes changes in the peroneal reaction time. This is a quasi-experimental study with 14 athletes, distributed in two groups, experimental and control. The results show some significant changes in the peroneal reaction time, in response to the exercise program.
- Influence of two tapings on the reaction time of the peroneal musclesPublication . Ferreira, A.; Monteiro, P.; Carvalho, Paulo; Moreira, CamiloThis study aimed to investigate the influence of two different types of tapings on the reaction time of the peroneal muscles, using surface electromyography, in female volleyball athletes with sprain history and indicators of instability. A quasi-experimental study with a sample of 15 athletes was conducted. Adhesive elastic tapings heel-lock and kinesiotape, with peroneus and ligament application, were compared. For data analysis the parametric tests repeated measures ANOVA and T test for paired samples were used. The application of the kinesiotape reduced the reaction time of peroneal muscles significantly while the adhesive elastic band had no significative influence on it.
- ISEP/INESC TEC Aerial Robotics Team for Search and Rescue Operations at the EuRathlon Challenge 2015Publication . Sousa, P.; Ferreira, A.; Moreira, M.; Santos, T.; Martins, A.; Dias, A.; Almeida, J.; Silva, E.This paper presents the autononomous aerial vehicle OTUS and its application to search and rescue scenarios, namely the participation on the EuRathlon 2015 competition. The OTUS robot was developed at INESC TEC/ ISEP for research in cooperative aerial robotics and applications in complex and dynamic environments. The system was validated in this challenging scenario and was able to win the Grand Challenge scenario in
- On the recyclability of glass fiber reinforced thermoset polymeric composites towards the sustainability of polymers' industryPublication . Ribeiro, M.C.S.; Dinis, M.L.; Meira Castro, Ana C.; Fiuza, A.; Meixedo, JP; Ferreira, A.; Alvim, M.R.Considering the added value of recycling solution assessed by an evaluation of flexural and compressive loading capacity of PC specimens modified with mechanically recycled GFRP wastes, as well as the inherent environmental and economic benefits, the incorporation of GFRP recyclates into PC materials has been revealed as a viable technological option for the sustainability of the GFRP polymers’ industry. Nevertheless, the recyclability of composite materials is complex and is sometimes seen as a key barrier to the adoption of these materials in some markets. One of the few successful applications, was developed by Reprocover, in Belgium, and it has been commercialized since 2011. In addition, the recently investigation line that was started and concerning the GFRP recyclates into PC materials also called the attention of Global Fiberglass SolutionsTM group. Even so, and although all the efforts that had been done on developing cost-effective recycling routes, GFRP wastes still remain mired by the scarceness of reliable outlet markets for the recyclates and clearly developed recycling paths between waste producers and potential consumers for the recyclates. However, it is foreseen that this scenario will change in the next few years as strong investments are being made in this field. The innovation in this field has just started, providing as this way a source of new opportunities.
- Recycling Approach towards Sustainability Advance of Composite Materials’ IndustryPublication . Ribeiro, M.C.S.; Fiuza, A.; Ferreira, A.; Dinis, M.L.; Meira Castro, Ana C.; Meixedo, JP; Alvim, M.R.Worldwide volume production and consumption of engineered composite materials, namely fiber reinforced polymers (FRP), have increased in the last decades, mostly in the construction, automobile, aeronautic and wind energy sectors. This rising production and consumption have also led to an increasing amount of FRP waste, either end-of-life (EoL) products or manufacturing rejects. Taking into account the actual and impending EU framework on waste management, in which clear targets are set with concrete measures to ensure effective implementation, landfill and incineration will be progressively unavailable as traditional end-routes for this kind of waste. Recycling techniques and end-use applications for the recyclates have been investigated over the past twenty years, but even so, more cost-effective and feasible market outlets for the recyclates should be identified that meet both the economic and the environmental points of view. This paper is aimed at enclosing and summarizing an update overview regarding all these issues: current legislation, recycling techniques and end-use applications for the recyclates. Additionally, as a case study, the assessment of the potential improvements that could be made on the eco-efficiency performance (sustainability) of a typical FRP composite materials’ industry by recycling and re-engineering process approaches is also reported.