Výsledky vyhledávání - "Ferreira, Antonio Luis"

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Bipartitioning of directed and mixed random graphs

Autor: Lipowski, Adam, Ferreira, Antonio Luis, Lipowska, Dorota, Barroso, Manuel A.

Publikováno v: J. Stat. Mech. (2019) 083301

We show that an intricate relation of cluster properties and optimal bipartitions, which takes place in undirected random graphs, extends to directed and mixed random graphs. In particular, the satisfability threshold coincides with the relative size

Externí odkaz: http://arxiv.org/abs/1901.09298

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Phase transitions in Ising models on directed networks

Autor: Lipowski, Adam, Ferreira, Antonio Luis, Lipowska, Dorota, Gontarek, Krzysztof

Publikováno v: Phys. Rev. E 92, 052811 (2015)

We examine Ising models with heat-bath dynamics on directed networks. Our simulations show that Ising models on directed triangular and simple cubic lattices undergo a phase transition that most likely belongs to the Ising universality class. On the

Externí odkaz: http://arxiv.org/abs/1510.00423

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Emergence of Social Structures via Preferential Selection

Autor: Lipowski, Adam, Lipowska, Dorota, Ferreira, Antonio Luis

Publikováno v: Phys. Rev. E 90, 032817 (2014)

We examine a weighted-network multi-agent model with preferential selection such that agents choose partners with the probability $p(w)$, where $w$ is the number of their past selections. When $p(w)$ increases sublinearly with the number of past sele

Externí odkaz: http://arxiv.org/abs/1406.1938

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Critical behaviour of a tumor growth model - Directed Percolation with a mean-field flavour

Autor: Lipowski, Adam, Ferreira, Antonio Luis, Wendykier, Jacek

Publikováno v: Phys. Rev. E 86, 041138 (2012)

We examine the critical behaviour of a lattice model of tumor growth where supplied nutrients are correlated with the distribution of tumor cells. Our results support the previous report (Ferreira et al., Phys. Rev. E 85, 010901 (2012)), which sugges

Externí odkaz: http://arxiv.org/abs/1206.2392

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Statistical mechanics model of angiogenic tumor growth

Autor: Ferreira, Antonio Luis, Lipowska, Dorota, Lipowski, Adam

Publikováno v: Phys.Rev. E 85, 010901(R) (2012)

We examine a lattice model of tumor growth where survival of tumor cells depends on the supplied nutrients. When such a supply is random, the extinction of tumors belongs to the directed percolation universality class. However, when the supply is cor

Externí odkaz: http://arxiv.org/abs/1110.3530

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Coexistence and critical behaviour in a lattice model of competing species

Autor: Wendykier, Jacek, Lipowski, Adam, Ferreira, Antonio Luis

Publikováno v: Phy. Rev. E 83, 031904 (2011)

In the present paper we study a lattice model of two species competing for the same resources. Monte Carlo simulations for d=1, 2, and 3 show that when resources are easily available both species coexist. However, when the supply of resources is on a

Externí odkaz: http://arxiv.org/abs/1010.2538

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