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Sebastián Gonçalves

Faculty Title

Professor Titular

Short Bio

I was born in Buenos Aires, Argentina, and obtained my Ph.D. in Physics at the Universidad de Buenos Aires in 1992, researching at the Comision Nacional de Energía Atómica.  Then I moved to Porto Alegre, Brazil, as a Postdoc at the Instituto de Física of the Universidade Federal do Rio Grande do Sul, where I became Professor in 1997. Before that I spend one year and a half  in Santiago, Chile, as a researcher at the Facultad de Física of the Pontificia Universidad Católica. I have ongoing collaborations with the group of Statistical Physics of the Centro Atómico Bariloche in Argentina, and with the University of New Mexico.

My present interest is in some problems in the so called "socio-physics" area, which is a wide subject under the huge umbrella of complex systems. Socio-physics means today the use and application of traditional model and tools of mechanical statistics to help understand the behavior of complex systems made of people. Critical behavior, phase transitions, and dynamical systems are some of the concepts used in socio-physics. Recent advances and ideas from network theory are used prominently too. Network robustness and crime, opinion and innovation dynamics, econophysics, and the spread of epidemics are some of my specific topics of research.

In the past I have worked in condensed matter: magnetic foams, spinodal decomposition, and order-disorder transition. Besides, I still work and have interest in the microscopic origin of friction. The preferred tools and methods of work are numerical simulations, like agent based models, Monte Carlo, and Molecular Dynamics techniques.

People I work(ed) with

Maria Lujan Iglesias
Bruno Requião da Cunha
Juan Carlos Gonzalez Avella
Roberto Da Silva
Mendelli Vainstein
Felipe Paula
Alexsandro Carvalho
Sergio Souza
Italo Gabriel Neide
Marcelo Ferreira da Costa Gomes
Mukesh Tiwari
Yping Ma
Sylvain Mignot
Jean-Pierre Nadal
Mirta Gordon
Gaspar Caon
M. Rodriguez Achach
R. Huerta-Quintanilla
Cristian Muorkazel
Evy Salcedo Torres
Claudio Scherer
Salete Pianegoda
José Luis Vega
Alan Bishop
Claudio Fusco
V. M. Kenkre
Guillermo Abramson
Oscar Nagel
Marcelo Kuperman
Sebastian Risau Gusmao
Fabiana Laguna
Fernanda Stedille
Israel Baumvol
Rita Maria Cunha de Almeida
Elisa Brod de Oliveira da Rosa
Leonardo Gregory Brunnet
Gerardo Martinez
Jose Roberto Iglesias
Migel Kiwi
Ricardo Ramirez
Hernan Bonadeo

Publications (since 2003)

Sliding and dry friction: Prandtl-Tomlinson athermal model revisited
Maria Lujan Iglesias and Sebastián Gonçalves
Brazilian Journal of Physics (2018)

Topology, robustness, and structural controllability of the Brazilian Federal Police criminal intelligence network
Bruno Requião da Cunha and Sebastián Gonçalves
Applied Network Science 3 (1), 36 (2018)

Adoption of innovations with contrarian agents and repentance
MB Gordon, MF Laguna, S Gonçalves, and JR Iglesias
Physica A: Statistical Mechanics and its Applications 486, 192-205 (2017)

Performance of attack strategies on modular networks
Bruno Requião da Cunha and Sebastián Gonçalves
Journal of Complex Networks 5 (6), 913-923 (2017)

Key factors in disease spreading: Spatial heterogeneity, time dependence, and human behavior:
Comment on "Pattern transitions in spatial epidemics: Mechanisms and emergent properties"

S Gonçalves
Physics of life reviews 19, 79 (2016)

Fast Fragmentation of Networks using Module-Based Attacks
Bruno Requião da Cunha, Juan Carlos Gonzalez Avella, and Sebastián Gonçalves
PLoS ONE 10(11): e0142824 (2015)

Anomalous diffusion in the evolution of soccer championship scores: Real data, mean-field analysis, and an agent-based model
R. Da Silva, M. H. Vainstein, S. Gonçalves, and F. S. F. Paula
Phys. Rev. E 88, 022136 (2013).

Epidemics Scenarios in the "Romantic Network"
Alexsandro M. Carvalho and Sebastián Gonçalves
PLoS ONE 7(11): e49009 (2012)

Why, when, and how fast innovations are adopted
S. Gonçalves, M.F. Laguna, and J.R. Iglesias
The European Physical Journal B 85, 192 (2012)

Dynamical model for competing opinions
S. R. Souza and S. Gonçalves
Physical Review E 85, 056103 (2012)

Oscillations in SIRS model with distributed delays
S. Gonçalves, G. Abramson, and MFC Gomes
The European Physical Journal B 81, 363–371 (2011)

Effects of rotation on the nonlinear friction of a damped dimer sliding on a periodic substrate
I. G. Neide, V. M. Kenkre, and S. Gonçalves
Physical Review E 82, 046601 (2010)

Cycles of cooperation and free-riding in social systems
Yiping Ma, Sebastián Gonçalves, Sylvain Mignot, Jean-Pierre Nadal, and Mirta B. Gordon
The European Physical Journal B 71, 597-610 (2009)

SIR model with general distribution function in the infectious period
Gomes M. F. da Costa and S. Gonçalves
Physica A 388, 3133-3142 (2009)

Generalization of a nonlinear friction relation for a dimer sliding on a periodic substrate
M. Tiwari, S. Gonçalves, and V. M. Kenkre
The European Physical Journal B, 62(4) 459-464 (2008)

The unfair consequences of equal opportunities:
comparing exchange models of wealth distribution

G. M. Caon, S. Gonçalves, and J.R. Iglesias
The European Physical Journal Special Topics, 143, 69-74 (2007)

Wealth condensation in a multiplicative random asset exchange model
Cristian Mourkazel, S. Gonçalves, J.R. Iglesias, M. Rodriguez Achach, and R. Huerta-Quintanilla
The European Physical Journal Special Topics, 143, 75-79 (2007)

The SIR model with general distribution function in the infection period for epidemic dynamic
M. F. da Costa Gomes and S. Gonçalves
Actas de la Academia Nacional de Ciencias, XIII, Biomat, 153 (2007)

Reply to Comment on ``Dynamical of Thermal Growth of Silicon Oxide Films on Si''
R. M. C. de Almeida, S. Gonçalves, I. J. R. Baumvol, and F. C. Stedile
Physical Review B 74, 127302 (2006)

Nanoscale sliding friction versus commensuration ratio: Molecular dynamics simulations
S. Gonçalves, E. S. Torres, C. Scherer, and M. Kiwi
Physical Review B 73, 35434 (2006)

Bistability and hysteresis in the sliding friction of a dimer
S. Gonçalves, C. Fusco, A.R. Bishop, and V.M. Kenkre
Physical Review B 72, 195418 (2005)

Dynamics of opinion in hierarchical organizations
M. F. Laguna, S. R. Gusman, G. Abramson, S. Gonçalves, and J. R. Iglesias
Physica A 351, 580 (2005)

Nonlinear friction of a damped dimer sliding on a periodic substrate
S. Gonçalves, V.M. Kenkre, and A.R. Bishop
Physical Review B 70, 195415 (2004)

A Social Model for the Evolution of Sexual Transmitted Diseases
S. Gonçalves, M. Kuperman, and M. F. da Costa Gomes
Physica A 342, 256 (2004)

Correlation between risk aversion and wealth distribution
J. R. Iglesias, S. Gonçalves, G. Abramson, and J. L. Vega
Physica A 342, 186 (2004)

Promiscuity and the evolution of the sexually transmitted diseases
S. Gonçalves, M. Kuperman, and M. F. da Costa Gomes
Physica A 327, 6 (2003)

The social behaviour and the evolution of sexually transmitted diseases
S. Gonçalves and M. Kuperman
Physica A 328, 225 (2003)

Wealth redistribution in our small world
J. R. Iglesias, S. Gonçalves, S. Pianegoda, J. L. Vega, and G. Abramson
Physica A 327, 12 (2003)