Submissões Recentes

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Cantando Ciências : uma sequência didática integrando música e o ensino de vida e universo nos anos finais do ensino fundamental.
(2024) Rodes, Nathália de Assis; Cruz, Luciana Hoffert Castro; Barros, Marcelo Diniz Monteiro de; Patrocínio, Sandra de Oliveira Franco; Cruz, Luciana Hoffert Castro
A presente pesquisa desenvolveu uma sequência didática que incorporou músicas cujas letras contêm termos científicos, visando sua utilização nas aulas de Ciências sobre os temas Sol, Lua e Terra. A proposta teve como principal objetivo fornecer um material didático que auxiliasse os professores na implementação dessa abordagem pedagógica, aproximando os estudantes dos conteúdos de maneira prazerosa e envolvente. Embasada em um referencial teórico abrangente, a pesquisa considerou estudos de renomados autores como Barros et al. (2013), Zabala (1998), Louro e Nigro (2021) e Lima (2018). Esses estudos destacaram a eficácia da utilização de recursos alternativos ou complementares, como a música, no processo de ensino e aprendizagem, além de ressaltar a importância das sequências didáticas e do papel do professor na educação contemporânea. Além disso, as músicas escolhidas abrangeram diferentes épocas e estilos musicais, buscando diversificar as referências e atender aos variados gostos dos alunos, tornando as aulas mais dinâmicas e atrativas. Espera-se que o material desenvolvido, com sua abordagem multifacetada, seja uma ferramenta valiosa para os professores de Ciências do oitavo ano do ensino fundamental. A expectativa é que essa sequência didática ajude a despertar o interesse dos estudantes pela ciência, incentivando uma aprendizagem ativa e engajadora.
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Análise da percepção do uso de cigarros eletrônicos no Brasil por meio de comentários no YouTube.
(2024) Dias , Aline Martins; Tanure, Richardy Rodrigues; Almeida, Jussara Marques de; Lima, Helen de Cássia Sousa da Costa; Ferreira, Carlos Henrique Gomes; Lana
The rise of video platforms such as YouTube has revolutionized information sharing and influenced social habits and product consumption. At the same time, the diverse global regulatory landscape and ongoing studies on the health effects of e-cigarettes have led to intense and controversial debates. Amidst this, the production of content about e-cigarettes on the internet is rapidly increasing, particularly on YouTube, one of the most popular video platforms globally and the most popular in Brazil. Despite the growing body of research focused on understanding online interactions with ecigarettes, there is a lack of comprehensive and detailed temporal analyses that capture the dynamics of the debate and people’s stance towards these products, especially in the Brazilian context. To address this gap, our study aims to investigate the popularity and acceptance of e-cigarettes in Brazil by analyzing YouTube videos and their associated comments. We collected an extensive dataset of videos, channels, comments and their metadata from 2018 to 2023. Our methodology involved analyzing production and engagement metrics, and developing a deep learning-based stance detection model to estimate people’s stance (approval or disapproval) based on comments and quantify the temporal dynamics of these attitudes over the years. Our findings reveal a significant increase in content production and user engagement, indicating a growing public interest, with a notable increase in approving comments on the product. This study fills previous research gaps by offering a comprehensive and pioneering overview of e-cigarette use and public perception in Brazil, emphasizing the need for a more informed discussion among society and regulatory bodies.
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Characterization of the Brazilian musical landscape : a study of regional preferences based on the Spotify charts.
(2024) Moura, Filipe Augusto Santos de; Ferreira, Carlos Henrique Gomes; Lima, Helen de Cássia Sousa da Costa
In the digital age, streaming services such as Spotify have changed the way people consume music, highlighting the enormous influence these platforms have on the market. In the highly competitive music industry, it is crucial for independent artists in particular to maintain their popularity. This is especially true in countries like Brazil, where geographical and cultural differences influence music consumption patterns. Understanding these patterns is essential for effective marketing and production strategies. Despite previous research on music consumption, genre preferences and user behavior, there is a lack of detailed studies on the geographical and cultural distribution of music preferences in Brazil. Our study fills this gap by examining musical genre preferences and acoustic features of tracks across Brazilian regions over two years. We collected Spotify chart data from 2022 and 2023, modeled bipartite genre-city networks, and used backbone extraction methods to highlight significant genre preferences. Temporal analysis revealed patterns and persistence of musical preferences across cities, while clustering techniques revealed regional and cultural differences in acoustic features. Our results show that genre preferences are stable across Brazilian regions, with important genres emphasized by backbone networks. Persistence analysis suggests minimal changes over time, except during major holidays. Furthermore, Brazilian city clusters exhibit distinct acoustic patterns regardless of music genres, with notable differences in features such as liveliness, speechiness, and valence. This research provides new insights into regional musical diversity in Brazil and paves the way for future studies on cultural and geographical influences on music preferences.
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On compact groups with Engel-like conditions.
(2023) Bastos Júnior, Raimundo de Araújo; Silveira, Danilo Sanção da
Let G be a compact Hausdorff group. We show that if for every element x∈G there exists a positive integer q=q(x) such that xq is Engel, then G is locally virtually nilpotent. Furthermore, we show that if G is a finitely generated compact Hausdorff group in which any commutator [x,y] in G is Engel, then the commutator subgroup G′ is locally nilpotent.
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Non-singular derivations of solvable Lie algebras in prime characteristic.
(2019) Lima, Marcos Goulart; Schneider, Csaba
We study solvable Lie algebras in prime characteristic p that admit non-singular derivations. We show that Jacobson’s Theorem remains true if the quotients of the derived series have dimension less than p. We also study the structure of Lie algebras with non-singular derivations in which the derived subalgebra is abelian and has codimension one. The paper presents some new examples of solvable, but not nilpotent, Lie algebras of derived length 3 with non-singular derivations.