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Tornatore, Elisabetta; Maria Buccellato, Stefania; … - In: Physica A: Statistical Mechanics and its Applications 354 (2005) C, pp. 111-126

We propose a stochastic SIR model with or without distributed time delay and we study the stability of disease-free equilibrium. The numerical simulation of the stochastic SIR model shows that the introduction of noise modifies the threshold of system for an epidemic to occur and the threshold...

Persistent link: https://www.econbiz.de/10010872238

A statistical mechanics approach to Granovetter theory

Barra, Adriano; Agliari, Elena - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 10, pp. 3017-3026

In this paper we try to bridge breakthroughs in quantitative sociology/econometrics, pioneered during the last decades by Mac Fadden, Brock–Durlauf, Granovetter and Watts–Strogatz, by introducing a minimal model able to reproduce essentially all the features of social behavior highlighted by...

Persistent link: https://www.econbiz.de/10010873267

Stochastic stability in spatial three-player games

Miȩkisz, Jacek - In: Physica A: Statistical Mechanics and its Applications 343 (2004) C, pp. 175-184

We discuss long-run behavior of stochastic dynamics of many interacting agents. In particular, three-player spatial games are studied. The effect of the number of players and the noise level on the stochastic stability of Nash equilibria is investigated.

Persistent link: https://www.econbiz.de/10011061357

Temporal variations of long-term correlations in seismic activity fluctuations

Alvarez-Ramirez, J.; Echeverria, J.C.; Rodriguez, E. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 6, pp. 2261-2267

The scaling behavior of the 1998–2009 seismicity in Guerrero, southern Mexico, was studied by means of the detrended fluctuation analysis (DFA). We found that inter-seismic periods are correlated with a transition in the scaling behavior at about 200 seismic events. Correlations are relatively...

Persistent link: https://www.econbiz.de/10010588625

Statistical analysis on the evolution of OpenStreetMap road networks in Beijing

Zhao, Pengxiang; Jia, Tao; Qin, Kun; Shan, Jie; Jiao, … - In: Physica A: Statistical Mechanics and its Applications 420 (2015) C, pp. 59-72

evolution of OSM road networks in Beijing, China, from four aspects. First, findings from general analysis indicate that (1) the … indicate that (5) OSM road networks resemble the growth of real road networks and are undergoing an evolution process depicted … evolution process of continuous strong exploration accompanied by weak densification. …

Persistent link: https://www.econbiz.de/10011117885

Analyzing the structure of earthquake network by k-core decomposition

He, Xuan; Zhao, Hai; Cai, Wei; Li, Guang-Guang; Pei, … - In: Physica A: Statistical Mechanics and its Applications 421 (2015) C, pp. 34-43

of earthquake networks. On observation of the evolution of the maximum coreness, it is found that it has some sudden …

Persistent link: https://www.econbiz.de/10011194069

Computer simulation of arising of diploid genomes

Tretyakov, Victor S.; Tretyakov, Nikolay P. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 16, pp. 4215-4222

The haploid–diploid cycle where, under unfavorable conditions the population becomes diploid, is modeled by a Monte-Carlo method in the framework of the Jan–Stauffer–Moseley hypothesis. Diploidy and sex may have first arisen as a way to escape death, when a simple unicellular individual is...

Persistent link: https://www.econbiz.de/10010872040

Protein folding as an evolutionary process

Sharma, Vivek; Kaila, Ville R.I.; Annila, Arto - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 6, pp. 851-862

surrounding density-in-energy. Evolution toward more probable states, eventually attaining the stationary state, naturally selects …

Persistent link: https://www.econbiz.de/10010872071

Evolutionary computer simulations

Oliveira, Paulo Murilo Castro de - In: Physica A: Statistical Mechanics and its Applications 306 (2002) C, pp. 351-358

during the process, in order to study its long-term consequences. Second, evolution necessarily follows a critical dynamics …

Persistent link: https://www.econbiz.de/10010872083

A nice wrong model for the evolution of DNA base frequencies

Lobry, J.R - In: Physica A: Statistical Mechanics and its Applications 273 (1999) 1, pp. 99-102

Assuming that the evolution of DNA bases frequencies is governed by a symmetric process with respect to the two DNA …

Persistent link: https://www.econbiz.de/10010872789