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Information diffusion backbones in temporal networks

Progress has been made in understanding how temporal network features affect the percentage of nodes reached by an information diffusion process. In this work, we explore further: which node pairs are likely to contribute to the actual diffusion of information, i.e., appear in a diffusion trajectory...

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Autores principales: Zhan, Xiu-Xiu, Hanjalic, Alan, Wang, Huijuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6494818/
https://www.ncbi.nlm.nih.gov/pubmed/31043632
http://dx.doi.org/10.1038/s41598-019-43029-5
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author Zhan, Xiu-Xiu
Hanjalic, Alan
Wang, Huijuan
author_facet Zhan, Xiu-Xiu
Hanjalic, Alan
Wang, Huijuan
author_sort Zhan, Xiu-Xiu
collection PubMed
description Progress has been made in understanding how temporal network features affect the percentage of nodes reached by an information diffusion process. In this work, we explore further: which node pairs are likely to contribute to the actual diffusion of information, i.e., appear in a diffusion trajectory? How is this likelihood related to the local temporal connection features of the node pair? Such deep understanding of the role of node pairs is crucial to tackle challenging optimization problems such as which kind of node pairs or temporal contacts should be stimulated in order to maximize the prevalence of information spreading. We start by using Susceptible-Infected (SI) model, in which an infected (information possessing) node could spread the information to a susceptible node with a given infection probability β whenever a contact happens between the two nodes, as the information diffusion process. We consider a large number of real-world temporal networks. First, we propose the construction of an information diffusion backbone G(B)(β) for a SI spreading process with an infection probability β on a temporal network. The backbone is a weighted network where the weight of each node pair indicates how likely the node pair appears in a diffusion trajectory starting from an arbitrary node. Second, we investigate the relation between the backbones with different infection probabilities on a temporal network. We find that the backbone topology obtained for low and high infection probabilities approach the backbone G(B)(β → 0) and G(B)(β = 1), respectively. The backbone G(B)(β → 0) equals the integrated weighted network, where the weight of a node pair counts the total number of contacts in between. Finally, we explore node pairs with what local connection features tend to appear in G(B)(β = 1), thus actually contribute to the global information diffusion. We discover that a local connection feature among many other features we proposed, could well identify the (high-weight) links in G(B)(β = 1). This local feature encodes the time that each contact occurs, pointing out the importance of temporal features in determining the role of node pairs in a dynamic process.
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spelling pubmed-64948182019-05-17 Information diffusion backbones in temporal networks Zhan, Xiu-Xiu Hanjalic, Alan Wang, Huijuan Sci Rep Article Progress has been made in understanding how temporal network features affect the percentage of nodes reached by an information diffusion process. In this work, we explore further: which node pairs are likely to contribute to the actual diffusion of information, i.e., appear in a diffusion trajectory? How is this likelihood related to the local temporal connection features of the node pair? Such deep understanding of the role of node pairs is crucial to tackle challenging optimization problems such as which kind of node pairs or temporal contacts should be stimulated in order to maximize the prevalence of information spreading. We start by using Susceptible-Infected (SI) model, in which an infected (information possessing) node could spread the information to a susceptible node with a given infection probability β whenever a contact happens between the two nodes, as the information diffusion process. We consider a large number of real-world temporal networks. First, we propose the construction of an information diffusion backbone G(B)(β) for a SI spreading process with an infection probability β on a temporal network. The backbone is a weighted network where the weight of each node pair indicates how likely the node pair appears in a diffusion trajectory starting from an arbitrary node. Second, we investigate the relation between the backbones with different infection probabilities on a temporal network. We find that the backbone topology obtained for low and high infection probabilities approach the backbone G(B)(β → 0) and G(B)(β = 1), respectively. The backbone G(B)(β → 0) equals the integrated weighted network, where the weight of a node pair counts the total number of contacts in between. Finally, we explore node pairs with what local connection features tend to appear in G(B)(β = 1), thus actually contribute to the global information diffusion. We discover that a local connection feature among many other features we proposed, could well identify the (high-weight) links in G(B)(β = 1). This local feature encodes the time that each contact occurs, pointing out the importance of temporal features in determining the role of node pairs in a dynamic process. Nature Publishing Group UK 2019-05-01 /pmc/articles/PMC6494818/ /pubmed/31043632 http://dx.doi.org/10.1038/s41598-019-43029-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhan, Xiu-Xiu
Hanjalic, Alan
Wang, Huijuan
Information diffusion backbones in temporal networks
title Information diffusion backbones in temporal networks
title_full Information diffusion backbones in temporal networks
title_fullStr Information diffusion backbones in temporal networks
title_full_unstemmed Information diffusion backbones in temporal networks
title_short Information diffusion backbones in temporal networks
title_sort information diffusion backbones in temporal networks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6494818/
https://www.ncbi.nlm.nih.gov/pubmed/31043632
http://dx.doi.org/10.1038/s41598-019-43029-5
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