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- Universidade Federal do ParáBR15 papers
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27 papers
Corruption as a self-sustained collective state in political systems
Nuno Crokidakis, Jaime L. C. da C. Filho
Political corruption is often interpreted as the result of individual misconduct or isolated institutional failures. However, persistent corruption patterns observed in real-world…
Opinion dynamics under electoral shocks in competitive campaigns
Jaime L. C. da C. Filho, Nuno Crokidakis
We propose a computational framework for modeling opinion dynamics in electoral competitions that combines two realistic features: voter memory and exogenous shocks. The population…
Propositional Abduction via Only-Knowing: A Non-Monotonic Approach
Sanderson Molick, Vaishak Belle
The paper introduces a basic logic of knowledge and abduction by extending Levesque logic of only-knowing with an abduction modal operator defined via the combination of basic epis…
Sufficient conditions for unbounded superradiance in black hole spacetimes sourced by nonlinear electrodynamics
Marco A. A. de Paula, Luiz C. S. Leite, Luís C. B. Crispino
Recently, it has been reported that black holes (BHs) sourced by nonlinear electrodynamics (NED) can trigger unbounded superradiance, i. e., the total absorption cross section -- t…
The time-dependent quantum harmonic oscillator: a pedagogical approach via the Lewis-Riesenfeld dynamical invariant method
Stanley S. Coelho, Lucas Queiroz, Danilo T. Alves
In quantum mechanics courses, students often solve the Schrödinger equation for the harmonic oscillator with time-independent parameters. However, time-dependent quantum harmonic o…
Interseções entre a Física e os saberes da tradição ceramista
Samuel Antonio Silva do Rosario, Carlos Aldemir Farias da Silva
The growing interaction between traditional knowledge and formal sciences emerges as a relevant field of research. In this perspective, the aim of this article is to investigate th…