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- Alexei Vazquez, J. Gama Oliveira, Z. Dezso, K.-I. Goh, I. Kondor, Albert-László Barabási
- Physical review. E, Statistical, nonlinear, and…
- 2006

The dynamics of many social, technological and economic phenomena are driven by individual human actions, turning the quantitative understanding of human behavior into a central question of modern science. Current models of human dynamics, used from risk assessment to communications, assume that human actions are randomly distributed in time and thus well… (More)

- João Gama Oliveira, Albert-László Barabási
- Nature
- 2005

In an era when letters were the main means of exchanging scientific ideas and results, Charles Darwin (1809-82) and Albert Einstein (1879-1955) were notably prolific correspondents. But did their patterns of communication differ from those associated with the instant-access e-mail of modern times? Here we show that, although the means have changed, the… (More)

- Alexei Vázquez, J G Oliveira, Albert-László Barabási
- Physical review. E, Statistical, nonlinear, and…
- 2005

Subgraphs and cycles are often used to characterize the local properties of complex networks. Here we show that the subgraph structure of real networks is highly time dependent: as the network grows, the density of some subgraphs remains unchanged, while the density of others increase at a rate that is determined by the network's degree distribution and… (More)

- S N Dorogovtsev, J F F Mendes, J G Oliveira
- Physical review. E, Statistical, nonlinear, and…
- 2006

We study the mean length (l)(k) of the shortest paths between a vertex of degree k and other vertices in growing networks, where correlations are essential. In a number of deterministic scale-free networks we observe a power-law correction to a logarithmic dependence, (l)(k) = A ln[N/k((gamma-1)/2)]-Ck(gamma-1)/N+ in a wide range of network sizes. Here N is… (More)

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