Browsing by Author "Huepe, Cristián"

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    Generating music from flocking dynamics
    (IEEE, 2012) Huepe, Cristián; Cádiz, Rodrigo F.; Colasso, Marco
    We explore different approaches for generating music from the flocking dynamics of groups of mobile autonomous agents following a simple decentralized control rule. By developing software that links these dynamics to a set of sound wave generators, we study how each approach reflects sonically the transition to collective order and which produces musically interesting results. We consider three qualitatively different ways of translating flocking dynamics into music: (1) A direct approach that maps agent positions to sounds, (2) a synchronization approach where each agent carries an oscillator that couples to neighboring agents, and (3) a physics-inspired approach that mimics the sound that would result from an effective friction between neighboring agents. We find that all approaches allow the listener to discriminate between different phases in the system, but that the second and third can yield more musically interesting and appealing results.
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    Influence of online opinions and interactions on the Covid-19 vaccination in Chile
    (2022) Villegas, Claudio; Ortiz, Abril; Arriagada, Víctor; Ortega, Sofía; Walker, Juan; Arriagada Cardini, Eduardo Sergio; Kalergis Parra, Alexis Mikes; Huepe, Cristián
    We analyze 6 months of Twitter conversations related to the Chilean Covid-19 vaccination process, in order to understand the online forces that argue for or against it and suggest effective digital communication strategies. Using AI, we classify accounts into four categories that emerge from the data as a result of the type of language used. This classification naturally distinguishes pro- and anti-vaccine activists from moderates that promote or inhibit vaccination in discussions, which also play a key role that should be addressed by public policies. We find that all categories display relatively constant opinions, but that the number of tweeting accounts grows in each category during controversial periods. We also find that accounts disfavoring vaccination tend to appear in the periphery of the interaction network, which is consistent with Chile’s high immunization levels. However, these are more active in addressing those favoring vaccination than vice-versa, revealing a potential communication problem even in a society where the antivaccine movement has no central role. Our results highlight the importance of social network analysis to understand public discussions and suggest online interventions that can help achieve successful immunization campaigns.