Emergence of criticality in the transportation passenger flow: scaling and renormalization in the Seoul bus system.

Social systems have recently attracted much attention, with attempts to understand social behavior with the aid of statistical mechanics applied to complex systems. Collective properties of such systems emerge from couplings between components, for example, individual persons, transportation nodes s...uch as airports or subway stations, and administrative districts. Among various collective properties, criticality is known as a characteristic property of a complex system, which helps the systems to respond flexibly to external perturbations. This work considers the criticality of the urban transportation system entailed in the massive smart card data on the Seoul transportation network. Analyzing the passenger flow on the Seoul bus system during one week, we find explicit power-law correlations in the system, that is, power-law behavior of the strength correlation function of bus stops and verify scale invariance of the strength fluctuations. Such criticality is probed by means of the scaling and renormalization analysis of the modified gravity model applied to the system. Here a group of nearby (bare) bus stops are transformed into a (renormalized) "block stop" and the scaling relations of the network density turn out to be closely related to the fractal dimensions of the system, r Ausführliche Beschreibung Beschreibung ausblenden

1. Person:	Segun Goh verfasserin
Weitere Personen:	Keumsook Lee verfasserin; Moo Young Choi verfasserin; Jean-Yves Fortin verfasserin
Quelle:	In PLoS ONE Weitere Artikel
Format:	Online-Artikel
Sprache:	English
Beschreibung:	Online-Ressource
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	Source: Directory of Open Access Journals (DOAJ).