Data Science

Characterization of river flow fluctuations via horizontal visibility graphs
We report on a large-scale characterization of river discharges by employing the network framework of the horizontal visibility graph. …
Adriana C. Braga, Luiz G. A. Alves, Leandro S. Costa, Ademir A. Ribeiro, Manoel M. A. Jesus, Angel A. Tateishi, Haroldo V. Ribeiro
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Characterization of river flow fluctuations via horizontal visibility graphs
Scale-adjusted metrics for predicting the evolution of urban indicators and quantifying the performance of cities
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 …
Luiz G. A. Alves, Renio S. Mendes, Ervin K. Lenzi, Haroldo V. Ribeiro
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Scale-adjusted metrics for predicting the evolution of urban indicators and quantifying the performance of cities
Spatial correlations, clustering and percolation-like transitions in homicide crimes
The spatial dynamics of criminal activities has been recently studied through statistical physics methods; however, models and results …
Luiz G. A. Alves, Ervin K. Lenzi, Renio S. Mendes, Haroldo V. Ribeiro
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Spatial correlations, clustering and percolation-like transitions in homicide crimes
Analogies between the cracking noise of ethanol-dampened charcoal and earthquakes
We report on an extensive characterization of the cracking noise produced by charcoal samples when dampened with ethanol. We argue that …
Haroldo V. Ribeiro, Leandro S. Costa, Luiz G. A. Alves, Perseu A. Santoro, Sérgio Picoli, Ervin K. Lenzi, Rrenio S. Mendes
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Analogies between the cracking noise of ethanol-dampened charcoal and earthquakes
Len Fisher: Woodquakes and earthquakes
Two upcoming papers in Physical Review Letters shed a light on the way that scientists can use analogies to understand fundamental physical processes.
Len Fisher
Jul 1, 2015 2 min read Media coverage
Len Fisher: Woodquakes and earthquakes
Investigating the interplay between mechanisms of anomalous diffusion via fractional Brownian walks on a comb-like structure
The comb model is a simplified description for anomalous diffusion under geometric constraints. It represents particles spreading out …
Haroldo V. Ribeiro, Angel A. Tateishi, Luiz G. A. Alves, Rafael S. Zola, Ervin K Lenzi
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Investigating the interplay between mechanisms of anomalous diffusion via fractional Brownian walks on a comb-like structure
Long-range spatial correlations and fluctuation statistics of lightning activity rates in Brazil
We report on a statistical analysis of the lightning activity rates in all Brazilian cities. We find out that the average of lightning …
Haroldo V. Ribeiro, Fernando J. Antonio, Luiz G. A. Alves, Ervin K. Lenzi, Renio S. Mendes
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Long-range spatial correlations and fluctuation statistics of lightning activity rates in Brazil
Scaling laws in the dynamics of crime growth rate
The increasing number of crimes in areas with large concentrations of people have made cities one of the main sources of violence. …
Luiz G. A. Alves, Haroldo V. Ribeiro, Renio S. Mendes
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Scaling laws in the dynamics of crime growth rate