@inproceedings{lobo-martins-2026-exploring,
    title = "Exploring Sentiment Analysis Approaches in a Public Agency Security News Dataset",
    author = "Lobo, Thiago Ruiz  and
      Martins, Claudia Aparecida",
    editor = "Souza, Marlo  and
      de-Dios-Flores, Iria  and
      Santos, Diana  and
      Freitas, Larissa  and
      Souza, Jackson Wilke da Cruz  and
      Ribeiro, Eug{\'e}nio",
    booktitle = "Proceedings of the 17th International Conference on Computational Processing of {P}ortuguese ({PROPOR} 2026) - Vol. 1",
    month = apr,
    year = "2026",
    address = "Salvador, Brazil",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-dnd/2026.propor-1.87/",
    pages = "878--888",
    ISBN = "979-8-89176-387-6",
    abstract = "As part of the institution{'}s 2024{--}2027 strategic plan, which includes the objective of understanding how the media portrays the organization to strengthen its public image, this paper investigates the application of deep learning algorithms in sentiment analysis of headline news about a public security institution. Four deep learning methods were applied in combination with three textual representations, resulting in twelve trained models. For each combination, a class-based analysis of the results was conducted. Models using BERT as the textual representation achieved strong performance, with an F1-score of approximately 90{\%}."
}