Ciências e Tecnologia | Artigos em revistas internacionais / Papers in international journals
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Browsing Ciências e Tecnologia | Artigos em revistas internacionais / Papers in international journals by Sustainable Development Goals (SDG) "13:Ação Climática"
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- iMOOC on climate change: evaluation of a massive open online learning pilot experiencePublication . Coelho, José; Teixeira, António; Nicolau, Paula Bacelar; Caeiro, Sandra; Rocio, VitorMOOCs are a recent phenomenon, although given its impact, have been subject to a large debate. Several questions have been raised by researchers and educators alike as regarding its sustainability both economical and as an efficient mode of education provision. In this paper we contribute to this discussion by presenting a case study, a Portuguese MOOC about lived experiences in climate change which piloted the iMOOC pedagogical model developed at Universidade Aberta. The iMOOC is an hybrid model which incorporates elements from existing MOOCs but adds other features drawn from UAb's experience with online learning and aim at better integrate in the larger context of the institutional pedagogical culture. The iMOOC implied also an integration of platforms - Moodle and Elgg. The course had more than one thousand participants, and it was the largest MOOC course on Portuguese language delivered so far. We discuss the effort required to design and deliver the course, the technological solution developed, and the results obtained. We registered a moderate effort to create and run the course, ensured by internal staff from the University. The technological solution was a success, an integrated architecture combining well-established, well-tested open software. The completion rate was 3.3%, but the high success of this innovative learning experience is demonstrated by the active involvement of participants, almost 50% of the ones that followed the course until the end, and the satisfaction survey results, with 90% of approval. Lessons learned from this experience and future research on the field are also discussed.
- Lay rationalities of climate changePublication . Alves, Fátima; Caeiro, Sandra; Azeiteiro, UlissesIn this special issue we were also interested in revealing the level of concepts and the level of social action, trying to contribute to the answer of questions like: How local populations explain, interpret and deal with climate change? What are the individual and collective actions in response to climate change? How do populations deal with Climate Change mitigation (risk perception and risk-mitigating)? What is the available traditional knowledge about Climate Change? How does the culture and believes deal with Climate Change? A total of 6 double-blind peer-reviewed papers from Europe (2), Australia, Asia, South-America and the North America, cover different subjects related to the above themes of this thematic Issue of Lay Rationalities of Climate Change, namely; Lived Experience,Policy and Public Action; Public Opinion on Climate Change; Religious Motivation for Mitigating Human-Forced Climate Change; People’s Experience and Facts of Changing Climate, Impacts and Responses; Stakeholders’ Climate Perception and Adaptation in Coastal Areas; and Perceptions of Climate Variability and farmer Adaptations.
- A multicriteria methodology for estimating consumer acceptance of alternative powertrain technologiesPublication . Sousa, Nuno; Almeida, Arminda; Rodrigues, João CoutinhoA multicriteria methodology for estimating consumer acceptance of vehicles with alternative powertrain technologies is presented. The approach is based on the non-compensatory ELECTRE TRI method and compares hybrid, plug-in hybrid, and electric vehicles to conventional models. Criteria considered are ownership costs and restrictions to vehicle use, which apply mainly to electric vehicles. The methodology is applied to a case study of 94 vehicles of different market segments and alternative powertrains. The analysis is carried out per segment and considers two driver profiles, city and all-purpose, and a baseline scenario for all cases. Output is tested for statistical significance, with powertrain technology as disaggregating factor, and a sensitivity analysis on the base scenario is also carried out, as well as a comparison with results derived by a compensatory multicriteria method (TOPSIS). Results show that conventional vehicles are the top choice for the small vehicles segment, due to lower purchase prices and higher use flexibility. For medium sized vehicles, all powertrain technologies are competitive for city drivers, whereas for all-purpose drivers, use restrictions for electric vehicles make these less attractive. The baseline scenario and sensitivity analysis highlight that opting for an electric vehicle depends strongly on the driver's use flexibility needs. As such, an electric vehicle can be either very attractive or outright unusable, regardless of financial considerations. It is also seen that plug-in hybrids do not present any significant advantage, as compared to other, non-electric choices, due to their higher purchase prices.