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Nowadays, our society suffers with a major issue that unfortunately is becoming more and more problematic, once again through social networks, that is the misinformation. The primary source of misinformation in Brazil is the messaging application WhatsApp. However, due to WhatsApp's private messaging nature, there still few misinformation data sets built specifically from this platform. In this context, building a data set of WhatsApp messages about COVID-19 in Brazilian Portuguese and label misinformation messages within it becomes a crucial challenge. In this work, we present the COVID-19.BR, a data set of WhatsApp messages about coronavirus in Brazilian Portuguese, collected from Brazilian public groups and manually labeled.

During the COVID-19 pandemic, the misinformation problem arose once again through social networks, like a harmful health advice and false solutions epidemic. In Brazil, as well as in many developing countries, one of the primary sources of misinformation is the messaging application WhatsApp. Thus, the automatic misinformation detection (MID) about COVID-19 in Brazilian Portuguese WhatsApp messages becomes a crucial challenge. Still, due to WhatsApp's private messaging nature, there are still few methods of misinformation detection developed specifically for the WhatsApp platform. In this paper, we propose a new approach, called MIDeepBR, based on BiLSTM neural networks, pooling operations and attention mechanism, which is able to automatically detect misinformation in Brazilian Portuguese WhatsApp messages. Experimental results evidence the suitability of the proposed approach to automatic misinformation detection. Our best results achieved an F1 score of 0.834, while in previous works, the best results achieved an F1 score of 0.778. Thus, MIDeepBR outperforms the previous works.

Resumo: Como se constrói socialmente um deputado estadual? Este trabalho discute o processo de formação sócio-histórica de 1 (um) Deputado estadual da 27ª Legislatura (2007Legislatura ( -2010 no Ceará através dos relato da biografia, da análise de documental, para compreender como se deu o seu aprendizado político. Quais são as influências sociais que o posicionaram no campo político? Essas são as principais perguntas que buscamos avaliar neste artigo. As bases deste trabalho estão na descrição e análise das disposições adquiridas pelo pesquisado em sua trajetória de socialização. Portanto, esta pesquisa tem como objetivo analisar os mecanismos de formação do habitus político e da relação do binômio indivíduo/sociedade.