Dranreb Earl O. Juanico

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Animal and human clusters are complex adaptive systems and many organize in cluster sizes s that obey the frequency distribution D (s) proportional to s(-tau). The exponent tau describes the relative abundance of the cluster sizes in a given system. Data analyses reveal that real-world clusters exhibit a broad spectrum of tau values, 0.7 (tuna fish schools)(More)
We study a locally nonconservative self-organized branching process (SOBP) in an open system of excitable agents exhibiting spontaneous excitation and deexcitation. The SOBP achieves criticality even in the absence of energy conservation as the population relaxes to a stable state with no overexcited agent. Criticality is widely thought to happen only in a(More)
Experimental evidence for self-organised criticality (SOC) in nonconservative systems has recently been found in studies of rat cortical slices. The size distribution of observed neuronal avalanches has been attested to obey 3/2 powerlaw scaling. A mean-field sandpile model of a noisy neuronal system is proposed to refute the irreconcilability between(More)
Colonies of flagellated bacteria on agar plates are known to take on diverse morphologies. A diffusion-reaction model is proposed for bacterial-colony pattern formation on a surface due to time scale separation between the slow mass migration of bacteria from the point of inoculation, and the fast, but localized, dynamics of bacterial phenotypic plasticity(More)
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