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Noticia ruim corre depressa!: Bad news travels fast!
Umeå University, Faculty of Science and Technology, Department of Physics. (Theoretical Physics)
2009 (Portuguese)In: Revista Brasileira de Ensino de Fisica, ISSN 1806-9126, Vol. 31, no 3, 313303- p.Article in journal (Refereed) Published
Abstract [pt]

Muitas provérbios surgem através da propria experiência cotidiana. Embora muitas dessas expressões sejam de entendimento direto por parte da populacão em geral, um olhar mais cuidadoso gera muitas questões e dúvidas a respeito da sua validade. Motivados por uma dessas expressões, no presente artigo, analisamos a transmissão de uma notícia numa rede de contatos eletrônicos (e-mails). Para tanto, são propostos protocolos de transmissão de notícia que reproduzem propriedades de sistemas reais. Esses protocolos são simulados numa rede real de e-mails e na rede aleatória proposta por P. Erdös e A. Rényi. Os resultados sugerem que uma notícia se espalha mais rapidamente na rede aleatória. A presenca de vértices concentradores de conexões (hubs) na rede real tende a atrair a notícia, prejudicando os vértices menos conectados.

Abstract [en]

Many proverbs are created through everyday experience. Although many of them are readily understood by ordinary people, a more detailed view generates many questions and doubts related to their credibility. Motivated by one of these proverbs, in the present paper, we analyse propagation of news in a network of electronic contacts (e-mails). More specifically, we propose transmission protocols intended to reproduce properties of real systems. These protocols are simulated in a real e-mail network and in the random network proposed by P. Erdös and A. Rényi. The results suggest that news spreads faster in the random network. The hubs in the real network tend to attract the news, in prejudice to the less connected nodes.

Place, publisher, year, edition, pages
Sociedade Brasileira de Fisica , 2009. Vol. 31, no 3, 313303- p.
Keyword [en]
Dynamical processes, News spreading
Keyword [pt]
Processos dinamicos, Espalhamento de noticias
National Category
Probability Theory and Statistics Other Physics Topics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-22242OAI: oai:DiVA.org:umu-22242DiVA: diva2:214109
Available from: 2009-05-03 Created: 2009-05-03 Last updated: 2012-01-27Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • de-DE
  • en-GB
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More languages
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  • html
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  • asciidoc
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