A Blogosfera como rede A Blogosfera como rede complexacomplexa

Osame KinouchiOsame Kinouchi

Angélica A. MandráAngélica A. Mandrá

Jean Haroldo O. BarbosaJean Haroldo O. Barbosa

Físicos se interessam pela Físicos se interessam pela Blogosfera!Blogosfera!

Quantitive and sociological analysis of blog networksQuantitive and sociological analysis of blog networks

WiktorWiktor BachnikBachnik, , Stanislaw Stanislaw SzymczykSzymczyk, , PiotrPiotr LeszczynskiLeszczynski, , RafalRafal PodsiadloPodsiadlo, , EwaEwa RymszewiczRymszewicz, , LukaszLukasz KuryloKurylo,,DanutaDanuta MakowiecMakowiec, , Beata Beata BykowskaBykowska (Gdańsk University, Poland) (Gdańsk University, Poland)

This paper examines the emerging phenomenon of blogging, using three This paper examines the emerging phenomenon of blogging, using three

different Polish blogging services as the base of the research. Authors show different Polish blogging services as the base of the research. Authors show

that blog networks are sharing their characteristics with complex networks that blog networks are sharing their characteristics with complex networks

gamma coefficients, small worlds, cliques, etc.). Elements of sociometric gamma coefficients, small worlds, cliques, etc.). Elements of sociometric

analysis were used to prove existence of some social structures in the blog analysis were used to prove existence of some social structures in the blog

networks.networks.

Journal reference:Acta Physica Polonica B Vol. 36, No. 10 (2005) 2435-2446Journal reference:Acta Physica Polonica B Vol. 36, No. 10 (2005) 2435-2446

The structure of self-organized blogosphereThe structure of self-organized blogosphere

FengFeng FuFu, , LianghuanLianghuan Liu Liu, , KaiKai Yang Yang, Long Wang, Long Wang

In this paper, a statistical analysis of the structure of one blog community, a kind of In this paper, a statistical analysis of the structure of one blog community, a kind of

social networks, is presented. The quantities such as degree distribution, clustering social networks, is presented. The quantities such as degree distribution, clustering

coefficient, average shortest path length are calculated to capture the features of the coefficient, average shortest path length are calculated to capture the features of the

blogging network. We demonstrate that the blogging network has small-world blogging network. We demonstrate that the blogging network has small-world

property and the in and out degree distributions have power-law forms. The analysis property and the in and out degree distributions have power-law forms. The analysis

also confirms that blogging networks show in general disassortative mixing pattern. also confirms that blogging networks show in general disassortative mixing pattern.

Furthermore, the popularity of the blogs is investigated to have a Zipf's law, namely, Furthermore, the popularity of the blogs is investigated to have a Zipf's law, namely,

the fraction of the number of page views of blogs follows a power law.the fraction of the number of page views of blogs follows a power law.

Submitted to Physica A. Submitted to Physica A. 

Word statistics in Blogs and RSS feeds: Towards empirical Word statistics in Blogs and RSS feeds: Towards empirical universal evidenceuniversal evidence

R. Lambiotte, M. Ausloos, M. ThelwallR. Lambiotte, M. Ausloos, M. Thelwall (Submitted on 15 Jul 2007)(Submitted on 15 Jul 2007)

We focus on the statistics of word occurrences and of the waiting times between such occurrences We focus on the statistics of word occurrences and of the waiting times between such occurrences

in Blogs. Due to the heterogeneity of words' frequencies, the empirical analysis is performed by in Blogs. Due to the heterogeneity of words' frequencies, the empirical analysis is performed by

studying classes of "frequently-equivalent" words, i.e. by grouping words depending on their studying classes of "frequently-equivalent" words, i.e. by grouping words depending on their

frequencies. Two limiting cases are considered: the dilute limit, i.e. for those words that are used frequencies. Two limiting cases are considered: the dilute limit, i.e. for those words that are used

less than once a day, and the dense limit for frequent words. In both cases, extreme events occur less than once a day, and the dense limit for frequent words. In both cases, extreme events occur

more frequently than expected from the Poisson hypothesis. These deviations from Poisson more frequently than expected from the Poisson hypothesis. These deviations from Poisson

statistics reveal non-trivial time correlations between events that are associated with bursts of statistics reveal non-trivial time correlations between events that are associated with bursts of

activities. The distribution of waiting times is shown to behave like a stretched exponential and to activities. The distribution of waiting times is shown to behave like a stretched exponential and to

have the same shape for different sets of words sharing a common frequency, thereby revealing have the same shape for different sets of words sharing a common frequency, thereby revealing

universal features. universal features.

A theory of web trafficA theory of web traffic

M.V. Simkin, V.P. RoychowdhuryM.V. Simkin, V.P. Roychowdhury

We analyze access statistics of several popular webpages for a period of several We analyze access statistics of several popular webpages for a period of several

years. The graphs of daily downloads are highly non-homogeneous with long periods years. The graphs of daily downloads are highly non-homogeneous with long periods

of low activity interrupted by bursts of heavy traffic. These bursts are due to of low activity interrupted by bursts of heavy traffic. These bursts are due to

avalanches of blog entries, referring to the page. We quantitatively explain this avalanches of blog entries, referring to the page. We quantitatively explain this

behavior using the theory of branching processes. We extrapolate these findings to behavior using the theory of branching processes. We extrapolate these findings to

construct a model of the entire web. According to the model, the competition construct a model of the entire web. According to the model, the competition

between webpages for viewers pushes the web into a self-organized critical state. In between webpages for viewers pushes the web into a self-organized critical state. In

this regime, the most interesting webpages are in a near-critical state, with a power this regime, the most interesting webpages are in a near-critical state, with a power

law distribution of traffic intensity. law distribution of traffic intensity.

Redes simplesRedes simples

Redes ComplexasRedes Complexas

Redes sem escalaRedes sem escala

A blogosfera é uma rede A blogosfera é uma rede sem escalasem escala

ComunidadesComunidades

Fenômenos ColetivosFenômenos Coletivos

Autoridade e ranqueamentoAutoridade e ranqueamento

Autoridade (Technorati):Autoridade (Technorati):• Número de blogs que fizeram links para Número de blogs que fizeram links para

um dado blog nos últimos seis mesesum dado blog nos últimos seis meses

RanqueRanque• Quantos blogs possuem mais autoridade Quantos blogs possuem mais autoridade

que um dado blog. que um dado blog. • Quanto menor o ranque, melhor.Quanto menor o ranque, melhor.

Autoridade em função do ranqueAutoridade em função do ranque

Efeito Top 100 TechnoratiEfeito Top 100 Technorati

1

10

100

1000

10000 100000 1000000 10000000

Ranque

Autoridade

Blogs científicos: Portugal x BrasilBlogs científicos: Portugal x Brasil

AutoridadeMédiaPT = 24BR = 16

Top 11 (!) da amostraTop 11 (!) da amostra

1 106 Uma Malla pelo mundo

2 66 Brontossauros em meu jardim

3 57 Ciência em Dia

4 50 Xis-Xis

5 45 Glúon/Blog

6 28 Roda de Ciência

7 25 Bafana Ciência

8 24 Transferência Horizontal

9 22 Blog do Mércio: Índios,Antropologia e

10 21 Geófagos

11 21 SEMCIÊNCIA