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Data bubbles para algoritmos de fluxo de dados hierárquicos baseados em densidade
(Universidade Federal de São Carlos, 2025-07-09) Nunes, Bruno Leonel; Naldi, Murilo Coelho; https://lattes.cnpq.br/0573662728816861; https://orcid.org/0000-0002-3107-8236; https://lattes.cnpq.br/1673892645756438
Clustering data in Data Streams (DS) presents challenges due to the volume, velocity, and evolving nature of information. Hierarchical density-based clustering algorithms, such as HASTREAM, are promising for identifying arbitrarily shaped clusters, but their effectiveness critically depends on the quality of online data summarization. The standard approach, using Micro-Clusters (MCs), tends to lose information about the internal data distribution, distorting density estimates and negatively impacting the quality of the final clustering. This work proposes a novel summarization approach for hierarchical density-based clustering algorithms in DS, utilizing adapted Data Bubbles (DBs). DBs, which originally include internal density estimates , have been modified to operate under the damped window model, with new formulations for their properties based on weighted statistics. Furthermore, we propose a modification to the core distance calculation for DBs, aiming for better alignment with HDBSCAN* principles. The methodology involves integrating these adapted DBs and their revised distance metrics (modified Core Distance and Mutual Reachability Distance) into the HASTREAM algorithm, resulting in HASTREAM-DB. We describe the online maintenance processes for the adapted DBs (including the management of potential and outlier bubbles) and the subsequent offline phase of constructing the cluster hierarchy upon these structures. The objective is to demonstrate that the use of adapted Data Bubbles, by better preserving local spatial and density information, can mitigate the distortions inherent in MC-based summarization, leading to more accurate and robust cluster identification in Data Stream environments.
CPI da pirataria: economias populares, disputas e representações sobre o mercado de falsificações
(Universidade Federal de São Carlos, 2025-07-09) Servilha Filho, Tiago Tadeu; Rangel, Felipe; https://lattes.cnpq.br/1619003785230081; https://orcid.org/0000-0002-0679-3756; https://lattes.cnpq.br/3883896580869658
This research aimed to understand, through the analysis of the Parliamentary Inquiry Committee (CPI) on Piracy conducted by the São Paulo City Council, the representations, disputes, and discourses surrounding the counterfeit goods market. By doing so, it advances the understanding of the tensions around divergent perceptions of the counterfeit market, enabling an analysis of the affinities between state institutions and large corporations in anti-piracy efforts, as well as their effects on the control of popular economic practices. Methodologically, the investigation was based on an in-depth analysis of the stenographic records, videos, and documents submitted to the CPI, as well as a survey of news regarding the production, trade, and anti-piracy actions. The research drew on existing Social Sciences literature on popular economies and the issue of piracy to analyze the discourses, representations, and emerging conflicts within the CPI, interpreting them within the framework of economic disputes surrounding contested markets.
Entre cozinhas e assembleias: protagonismo feminino em duas ocupações urbanas de São Carlos-SP
(Universidade Federal de São Carlos, 2025-07-09) Camargo, Maria Eugenia; Motta, Luana Dias; https://lattes.cnpq.br/1042165629261102; https://lattes.cnpq.br/0108883882696476
This monograph follows the life paths of Jéssica and Érica, leaders of two urban occupations located on the outskirts of São Carlos, in the interior of São Paulo. Using an ethnographic approach — which included participant observation, collaboration in daily activities, and semi-structured interviews — it examines the trajectories of these two women as they built their positions of leadership. The occupations’ community kitchens were taken as a privileged site of observation, given the symbolic and practical significance of food in a territory marked by food insecurity. The study is based on the hypothesis that care work — especially the preparation and distribution of food — is one of the main foundations of the authority exercised by these women. Observing their practices reveals how care plays a central role in the collective management of the territory and the political organization of the communities. This research thus highlights women’s leadership in urban occupations and the ways in which women reinvent political practice from the margins.