Related Experiment Video
Updated: Sep 8, 2025

Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
Phase diagram in a one-dimensional civil disorder model
Ignacio Ormazábal1, Felipe Urbina2, Félix A Borotto1
1Departamento de Física, Universidad de Concepción, Concepción, Chile.
Abstract:
Epstein's model for a civil disorder is an agent-based model that simulates a social protest process where the central authority uses the police force to dissuade it. The interactions of police officers and citizens produce dynamics that do not yet have any analysis from the sociophysics approach. We present numerical simulations to characterize the properties of the one-dimensional civil disorder model on stationary state. To do this, we consider interactions on a Moore neighborhood and a random neighborhood with two different visions. We introduce a Potts-like energy function and construct the phase diagram using the agent state concentration. We find order-disorder phases and reveal the principle of minimum grievance as the underlying principle of the model's dynamics. Besides, we identify when the system can reach stable or an instability conditions based on the agents' interactions. Finally, we identified the most relevant role of the police based on their capacity to dissuade a protest and their effect on facilitating a stable scenario.
Related Concept Videos
Phase Diagram
Phase Diagrams
First Law: Particles in One-dimensional Equilibrium
Dynamic Equilibrium
First Law: Particles in Two-dimensional Equilibrium
Newton's first law tells us about...
Energy Diagrams - II
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The...

