Twitter Self-Organization to the Edge of a Phase Transition: Discrete-Time Model and Effective Early Warning Signals in Phase Space

Figure 4

Dynamic series of initial microposts corresponding to the second debate (a), variance (b), kurtosis (c), skewness (d), autocorrelation at lag-1 (e), Welch’s PSD estimation for power law exponent (f), correlation dimension (g), and approximate entropy (h) for the sandpile cellular automaton on the CLG with the Manna rule and pumping according to the law of discrete uniform distribution. The vertical red dashed line indicates a critical time. The time interval in which the debate took place is shown as a gray-filled region, the time interval for staying at the edge of the phase transition is shown as a red-filled region.

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