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Community structure in the United Nations General Assembly

Macon, Kevin T.; Mucha, Peter J.; Porter, Mason A. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 1, pp. 343-361

We study the community structure of networks representing voting on resolutions in the United Nations General Assembly …. We construct networks from the voting records of the separate annual sessions between 1946 and 2008 in three different … ways: (1) by considering voting similarities as weighted unipartite networks; (2) by considering voting similarities as …

Persistent link: https://www.econbiz.de/10011062351

Effective dimensions in networks with long-range connections

Moukarzel, Cristian F. - In: Physica A: Statistical Mechanics and its Applications 356 (2005) 1, pp. 157-161

according to P(r)∼r-μ. By changing the decay exponent μ one can go from d-dimensional short-range networks to ∞-dimensional … networks topologically similar to random graphs. An effective dimension dchem(μ) can be defined in terms of the shortest …-path properties of these networks. These effective dimensions dchem are calculated here in one and two dimensions, for system sizes of …

Persistent link: https://www.econbiz.de/10011062380

Limits on relief through constrained exchange on random graphs

LaViolette, Randall A.; Ellebracht, Lory A.; Gieseler, … - In: Physica A: Statistical Mechanics and its Applications 383 (2007) 2, pp. 671-676

Agents are represented by nodes on a random graph (e.g., “small world”). Each agent is endowed with a zero-mean random value that may be either positive or negative. All agents attempt to find relief, i.e., to reduce the magnitude of that initial value, to zero if possible, through...

Persistent link: https://www.econbiz.de/10011062455

Modelling hierarchical and modular complex networks: division and independence

Kim, D.-H.; Rodgers, G.J.; Kahng, B.; Kim, D. - In: Physica A: Statistical Mechanics and its Applications 351 (2005) 2, pp. 671-679

for real-world networks. …

Persistent link: https://www.econbiz.de/10011062853

Potts model with q=4,6, and 8 states on Voronoi–Delaunay random lattice

Lima, F.W.S. - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 16, pp. 3039-3047

Through Monte Carlo simulations we study the 2D Potts models with q=4,6 and 8 states on Voronoi–Delaunay random lattice. In this study, we assume that the coupling factor J varies with the distance r between the first neighbors as J(r)∝e−ar, with a≥0. The disordered system is simulated...

Persistent link: https://www.econbiz.de/10011063357

Has the world economy reached its globalization limit?

Miśkiewicz, Janusz; Ausloos, Marcel - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 4, pp. 797-806

” countries are examined. Four types of “distances” are calculated. Two types of networks are next constructed for each distance …

Persistent link: https://www.econbiz.de/10011063383

Ising model with spins S=1/2 and 1 on directed and undirected Erdös–Rényi random graphs

Lima, F.W.S.; Sumour, M.A. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 4, pp. 948-953

Using Monte Carlo simulations, we study the Ising model with spin S=1/2 and 1 on directed and undirected Erdös–Rényi (ER) random graphs, with z neighbors for each spin. In the case with spin S=1/2, the undirected and directed ER graphs present a spontaneous magnetization in the universality...

Persistent link: https://www.econbiz.de/10011063450

Prosocial norms and degree heterogeneity in social networks

Kovářík, Jaromír; Brañas-Garza, Pablo; Cobo-Reyes, … - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 3, pp. 849-853

We provide empirical evidence to support the claims that social diversity promotes prosocial behavior. We elicit a real-life social network and its members’ adherence to a social norm, namely inequity aversion. The data reveal a positive relationship between subjects’ prosociality and...

Persistent link: https://www.econbiz.de/10011063513

A local multiresolution algorithm for detecting communities of unbalanced structures

Rizman Žalik, Krista; Žalik, Borut - In: Physica A: Statistical Mechanics and its Applications 407 (2014) C, pp. 380-393

In complex networks such as computer and information networks, social networks or biological networks a community … structure is a common and important property. Community detection in complex networks has attracted a lot of attention in recent … real-world and synthetic networks. …

Persistent link: https://www.econbiz.de/10011063680

Preferential network perturbation

Quayle, A.P.; Siddiqui, A.S.; Jones, S.J.M. - In: Physica A: Statistical Mechanics and its Applications 371 (2006) 2, pp. 823-840

We study network robustness to perturbation for a pair of non-directional networks, motivated by applications in cancer … network modelling. The susceptibility of single networks to attack and failure has been well-studied, but a similar problem … for a pair of networks with non-zero similarity has so far not been considered. In the current approach, we wish to …

Persistent link: https://www.econbiz.de/10011063695