One of the advantages of a Conversational Agent is that it stimulates social presence among Distance Education students, providing continuous psychological and pedagogical support. However, the interaction between students and virtual agents is often functionally ineffective. In this regard, this study aims to investigate students' mood states, inferred by chat log analysis of interactions between students and a Conversational Agent, relating such mood states with the students' perceptions about the tool. The study was conducted with a sample of students attending a Distance Education post-graduation course. The results showed the relationship between interest, utility and satisfaction perceived by the students with mood states detected by the log analysis. Also, the underutilization of the Conversational Agents was diagnosed, and improvements to be implemented so that negative mood states which can be overcome were identified. The research brings contributions on building better Conversational Agents for educational purposes.
The carbon market has been attracting attention as an additional source of revenue associated with growing planted forests. In addition to the economic importance, planted forests play an essential role in mitigating climate change due to their high potential to sequester carbon from the atmosphere and store it in soil, biomass or litter. Therefore, forest cultivation and the carbon market present win-win opportunities for both the economic and ecological systems. One question that arises for those who intend to invest in planted forests projects for carbon credits trading is: which species within Pinus or Eucalyptus, performs better in Carbon Sequestration and Storage (CSS)? Based on a systematic review of the scientific literature, we ranked the cultivated species of the genus Eucalyptus and Pinus based on their CSS performance. The findings suggest that Eucalyptus performs slightly better than Pinus, given that this supremacy was reported in 60% of the studies analyzed. However, paired analysis between species show that Pinus patula , P. halepensis, and P. radiata presented better performance than Eucalyptus saligna, E. occidentalis, and E. globulus, respectively. At the same time, Eucalyptus spp., E. cloenziana, E. grandis, and E. tereticornis performed better than Pinus spp., P. armandii, P. massoniana, P. taeda, P. caribaea, and P. roxburghii, respectively. However, species' effective performance in sequestering and storing carbon depends on other issues such as technical factors, management practices, and biophysical conditions. We identified that biophysical conditions, such as the site index, soil type, soil density, stand elevation, water deficit, soil clay, aluminum content, edaphoclimatic conditions and land use change were the most important. Thus, besides the species to be cultivated, the potential for generating carbon credits by planted forests also depends on local biophysical conditions and management practices adopted.
Este trabalho propõe uma aplicação multiplataforma para dispositivos móveis voltada ao gerenciamento de projetos. O Chronos Mobi baseia-se no modelo Chronos, cujos componentes englobam mapas mentais, PMBoK e Scrum. A implementação baseou-se no uso do framework Phonegap que prove inúmeros recursos para o desenvolvimento móvel. Para a avaliação do Chronos Mobi realizou-se uma análise comparativa do desempenho da aplicação executando em tablets e smartphones nas plataformas Android, Windows Phone e Symbian
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