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- Ervin K. Lenzi, Celia Anteneodo, Lisa Borland
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2001

We investigate the escape behavior of systems governed by the one-dimensional nonlinear diffusion equation theta(t)rho=theta(x)[theta(x)Urho]+Dtheta(x)2rho(nu), where the potential of the drift,â€¦ (More)

- Luis Carlos Malacarne, Renio S. Mendes, Ervin K. Lenzi
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2002

Usually, the studies of distributions of city populations have been reduced to power laws. In such analyses, a common practice is to consider cities with more than one hundred thousand inhabitants.â€¦ (More)

- Haroldo V. Ribeiro, Luciano Zunino, Ervin K. Lenzi, Perseu A. Santoro, Renio S. Mendes
- PloS one
- 2012

Complexity measures are essential to understand complex systems and there are numerous definitions to analyze one-dimensional data. However, extensions of these approaches to two orâ€¦ (More)

- Haroldo V. Ribeiro, Lucas De Souza Machado Costa, +4 authors Renio S. Mendes
- Physical review letters
- 2015

We report on an extensive characterization of the cracking noise produced by charcoal samples when dampened with ethanol. We argue that the evaporation of ethanol causes transient and irregularlyâ€¦ (More)

- Luiz G. A. Alves, Haroldo V. Ribeiro, Ervin K. Lenzi, Renio S. Mendes
- PloS one
- 2013

We report on a quantitative analysis of relationships between the number of homicides, population size and ten other urban metrics. By using data from Brazilian cities, we show that well-definedâ€¦ (More)

- Luis Carlos Malacarne, Renio S. Mendes, Isabel Tamara Pedron, Ervin K. Lenzi
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2001

The nonlinear diffusion equation partial delta rho/delta t=D Delta rho(nu) is analyzed here, where Delta[triple bond](1/r(d-1))(delta/delta r)r(d-1-theta) delta/delta r, and d, theta, and nu are realâ€¦ (More)

- Renio S. Mendes, Haroldo V. Ribeiro, F. C. M. Freire, A. A. Tateishi, Ervin K. Lenzi
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2011

We report a statistical analysis of more than eight thousand songs. Specifically, we investigated the probability distribution of the normalized sound amplitudes. Our findings suggest a universalâ€¦ (More)

- Ervin K. Lenzi, Renio S. Mendes, Constantino Tsallis
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2003

Ubiquitous phenomena exist in nature where, as time goes on, a crossover is observed between different diffusion regimes (e.g., anomalous diffusion at early times which becomes normal diffusion atâ€¦ (More)

Nowadays we are often faced with huge databases resulting from the rapid growth of data storage technologies. This is particularly true when dealing with music databases. In this context, it isâ€¦ (More)

- Luiz G. A. Alves, Renio S. Mendes, Ervin K. Lenzi, Haroldo V. Ribeiro, CÃ©line Rozenblat
- PloS one
- 2015

More than a half of world population is now living in cities and this number is expected to be two-thirds by 2050. Fostered by the relevancy of a scientific characterization of cities and for theâ€¦ (More)