Loures L.,Polytechnic Institute of Portalegre |
Loures L.,Center for Spatial and Organizational Dynamics
Habitat International | Year: 2015
Generally located in advantageous locations near city centers or along waterfronts and supported by existing infrastructure, post-industrial landscapes constitute environmentally impaired resources that need to be returned to productive uses, and reintegrated into the surrounding community. However, the complexity of any post-industrial redevelopment project, evident in the number of different ways in which it is described both in the literature and by designers and developers who work and/or analyze these landscapes make post-industrial redevelopment difficult to accomplish. Considering the purpose of the present research, it was necessary to use several methods throughout the investigation, including quantitative and qualitative research methods divided in two main sections: literature review and case study research. Considering the collected data and the performed statistical analysis, it is possible to conclude that, thought there are strong relationships between several of the identified benefits and barriers, the survey revealed distinct perceptions about the benefits and the barriers associated to post-industrial redevelopment between the general public (i.e. redeveloped post-industrial site users) and redevelopment experts, idea which is of utmost importance considering that designers tend to be primarily focused on aesthetics, leaving society's other main goals to secondary status, and that planning and landscape redevelopment activities are increasingly becoming less the result of design and more the expression of economic and sociocultural forces. Moreover the performed analysis showed that while for the general public the main barriers to post-industrial redevelopment are the potential for biological, physical and chemical impacts, and the uncertainty about liability and cleanup issues; for experts the main barriers are the high redevelopment costs; and the challenges in obtaining financial support. Regarding the main benefits while for the general public, the creation of open green spaces and the creation of jobs are the most important ones, for experts they are associated with the possibility to reduce urban sprawl, and encourage recreation and connectivity. © 2014 Elsevier Ltd.
Oliveira J.F.,Polytechnic Institute of Portalegre
2013 8th International Conference on Information Technology in Asia - Smart Devices Trend: Technologising Future Lifestyle, Proceedings of CITA 2013 | Year: 2013
In an ideal world, blind people could navigate any new route without training, travel by underground/metro during rush hour without problems, and explore with confidence. Environments can be diverse and dynamic and unfortunately no universal gadget-aid solution yet exists to help navigation. Advances in mobile phone technology and entertainment devices such as the Kinect are allowing for new application scenarios to arise. In this paper, a system that could help interface a person to a wide range of environments is presented. The Path Force Feedback Belt system takes at a fixed rate dual images of the environment using a mobile device, it reconstructs a 3D model of the surroundings, and extracts features such as sidewalk corners, walls, and obstacles. The mobile device then determines which of the force feedback actuators on a 360° belt worn on the waist has to be signaled, hence providing path feedback. © 2013 IEEE.
Francisco S.M.,University of Lisbon |
Veiga Simao A.M.,University of Lisbon |
Ferreira P.C.,University of Lisbon |
Martins M.J.D.D.,Polytechnic Institute of Portalegre
Computers in Human Behavior | Year: 2015
The purpose of this study was to investigate how university students perceive their involvement in the cyberbullying phenomenon, and its impact on their well-being. Thus, this study presents a preliminary approach of how college students' perceived involvement in acts of cyberbullying can be measured. Firstly, Exploratory Factor Analysis (N = 349) revealed a unidimensional structure of the four scales included in the Cyberbullying Inventory for College Students. Then, Item Response Theory (N = 170) was used to analyze the unidimensionality of each scale and the interactions between participants and items. Results revealed good item reliability and Cronbach's α for each scale. Results also showed the potential of the instrument and how college students underrated their involvement in acts of cyberbullying. Additionally, aggression types, coping strategies and sources of help to deal with cyberbullying were identified and discussed. Lastly, age, gender and course-related issues were considered in the analysis. Implications for researchers and practitioners are discussed. © 2014 Elsevier Ltd. All rights reserved.
Silva V.,University of Tras os Montes e Alto Douro |
Monteiro E.,IPP ESTG |
Couto N.,University of Tras os Montes e Alto Douro |
Brito P.,Polytechnic Institute of Portalegre |
And 2 more authors.
Energy and Fuels | Year: 2014
A comprehensive two-dimensional multiphase model was developed to describe the gasification of three large available Portuguese biomasses in a pilot scale fluidized bed gasifier within the computational fluid dynamics Fluent framework. An Eulerian - Eulerian approach was implemented to handle both the gas and the dispersed phases. The kinetic theory of granular flows was used to evaluate the constitutive properties of the dispersed phase, and the gas-phase behavior was simulated employing the k - ε turbulent model. Devolatilization phenomenon was also modeled. Results from the numerical model were later compared with experimental data also gathered for the three Portuguese biomasses. The simulated syngas compositions are in good agreement with the experimental results with maximum deviations of 20% (considering all simulations and biomasses). The effect of the gasification temperature and steam-to-biomass ratio on the syngas composition was evaluated as well as the cold gas efficiency, H2/CO ratio, CH4/H2 ratio, and carbon conversion. From this analysis, it was possible to define which biomass has the greater potential to be used concerning the selected application. Among the three biomasses, it was concluded that coffee husks and vine-pruning residues show better H2/CO ratios, while the higher CH4/H2 ratios are obtained by using the forest residues. The highest cold gas efficiencies were obtained by using the vine-pruning residues. These data are crucial to describe scenarios concerning the potential use of biomass as a source of energy in Portugal. © 2014 American Chemical Society.
Calha A.,Polytechnic Institute of Portalegre
Saude e Sociedade | Year: 2015
The extended increasing of life expectancy associated with a significant decline in the birth rate have contributed to a rapid aging of societies and a profound change in the demographic structure of many European countries. We analyze in this article the specific condition of the senior in the countries of Southern Europe and Scandinavia. In the case of countries with a configuration of different models of social protection, we realize that there are different ways of living old age in these societies. For this reason, our analysis uses the results obtained in the European Social Survey (round 5-2010). The analysis reveals the existence of different models that set the senior condition in the referred societies, which means different ways of dealing with the aging process. To conclude, the condition of the elderly does not depend solely on biological factors related to physical limitation, it is also influenced by social configuration that fits the experience of this period of individual life, as well as the way old people face it. © 2015 UNIV SAOPAULO. All rights reserved.