Activity of a social dynamics model

Reia, Sandro M.; Neves, Ubiraci Pereira da Costa

doi:10.1016/j.physa.2015.04.031

Cited by 6 publications

(2 citation statements)

References 16 publications

(17 reference statements)

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“…In a monocultural (ordered) state, S max /L 2 ≈ 1, a single cultural region covers almost the entire lattice; in a multicultural (disordered) state, multiple cultural regions exist. Other order parameters that have been used include the number of cultural domains [1,24], mean density of cultural domains [67], entropy [68], overlap between neighboring sites [63], and activity (number of changes) per agent [69].…”

Section: Modelmentioning

confidence: 99%

Another phase transition in the Axelrod model

Stivala,

Keeler

2016

Preprint

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Axelrod's model of cultural dissemination, despite its apparent simplicity, demonstrates complex behavior that has been of much interest in statistical physics. Despite the many variations and extensions of the model that have been investigated, a systematic investigation of the effects of changing the size of the neighborhood on the lattice in which interactions can occur has not been made. Here we investigate the effect of varying the radius R of the von Neumann neighborhood in which agents can interact. We show, in addition to the well-known phase transition at the critical value of q, the number of traits, another phase transition at a critical value of R, and draw a q -R phase diagram for the Axelrod model on a square lattice. In addition, we present a mean-field approximation of the model in which behavior on an infinite lattice can be analyzed.

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Section: Modelmentioning

confidence: 99%

Another phase transition in the Axelrod model

Stivala,

Keeler

2016

Preprint

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“…In the literature, the steady state has been characterized by using the relative size of the dominant (biggest) cluster S = N D /N as an order parameter, where N D is the number of agents of such cluster [3] (refs. [17,18] explore the concept of order parameter for this model).…”

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confidence: 99%

Persistent agents in Axelrod's social dynamics model

Reia

Neves

2016

EPL

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Axelrod's model of social dynamics has been studied under the effect of external media. Here we study the formation of cultural domains in the model by introducing persistent agents. These are agents whose cultural traits are not allowed to change but may be spread through local neighborhood. In the absence of persistent agents, the system is known to present a transition from a monocultural to a multicultural regime at some critical Q (number of traits). Our results reveal a dependence of critical Q on the occupation probability p of persistent agents and we obtain the phase diagram of the model in the (p, Q)-plane. The critical locus is explained by the competition of two opposite forces named here barrier and bonding effects. Such forces are verified to be caused by non-persistent agents which adhere (adherent agents) to the set of traits of persistent ones. The adherence (concentration of adherent agents) as a function of p is found to decay for constant Q. Furthermore, adherence as a function of Q is found to decay as a power law with constant p.

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Role of propagation thresholds in sentiment-based model of opinion evolution with information diffusion

Wang

2016

Physica A: Statistical Mechanics and its Applications

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Activity of a social dynamics model

Cited by 6 publications

References 16 publications

Another phase transition in the Axelrod model

Another phase transition in the Axelrod model

Persistent agents in Axelrod's social dynamics model

Role of propagation thresholds in sentiment-based model of opinion evolution with information diffusion

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