Events Determine Spreading Patterns: Information Transmission via Internal and External Influences on Social Networks
Chuang Liu, Xiu-Xiu Zhan, Zi-Ke Zhang, Gui-Quan Sun, Pak Ming Hui

TL;DR
This paper investigates how both internal social network interactions and external influences affect information spreading, revealing that combined effects lead to faster, broader dissemination and that event characteristics shape spreading patterns.
Contribution
It introduces a novel theoretical model incorporating external influences into social network information transmission, supported by empirical analysis and mathematical validation.
Findings
External influence significantly impacts information spread.
Combined internal and external influences accelerate dissemination.
Event characteristics determine spreading patterns.
Abstract
Recently, information transmission models motivated by the classical epidemic propagation, have been applied to a wide-range of social systems, generally assume that information mainly transmits among individuals via peer-to-peer interactions on social networks. In this paper, we consider one more approach for users to get information: the out-of-social-network influence. Empirical analyses of eight typical events' diffusion on a very large micro-blogging system, \emph{Sina Weibo}, show that the external influence has significant impact on information spreading along with social activities. In addition, we propose a theoretical model to interpret the spreading process via both internal and external channels, considering three essential properties: (i) memory effect; (ii) role of spreaders; and (iii) non-redundancy of contacts. Experimental and mathematical results indicate that the…
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