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C. Ferreira

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Preprint Aug 2026

The Brazilian Vaccination Debate on YouTube: Topics, Perspectives, and Engagement Dynamics

Vaccination debates are central to online public health communication, as COVID-19 intensified disputes over scientific authority, institutional trust, and political identity. Yet studies often isolate semantic structure, stance, misinformation, and engagement, leaving their interplay over time poorly understood. We co...

Matheus S. Azevedo, Geovana S. de Oliveira, Andrea Failla et al. · 0 citations
Preprint Sep 2026

Don't You Know, Pump it Up! Investigating Cryptocurrency Manipulation in Telegram-Driven Activity

Telegram plays a pivotal role in cryptocurrency communication and has been repeatedly associated with coordinated schemes, such as pump-and-dump manipulation. However, existing studies typically focus on known manipulation chats or a limited set of cryptocurrencies, leaving open the question of how Telegram is leverage...

F. Moura, Giordano Paoletti, C. Ferreira et al. · 0 citations
Preprint Aug 2026

Structure, Topics, and Diffusion Effects of Bluesky Starter Packs

A large-scale empirical analysis of more than 50,000 English-language starter packs and over 600,000 associated users shows that starter packs form a highly interconnected ecosystem with substantial overlap across packs that largely reflects pre-existing communities.

Andrea Failla, V. L. S. Freitas, Giulio Rossetti et al. · 1 citation

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