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- W3102160731 abstract "Abstract We study variants of hierarchical modular network models suggested by Kaiser and Hilgetag [ Front. in Neuroinform., 4 (2010) 8] to model functional brain connectivity, using extensive simulations and quenched mean-field theory (QMF), focusing on structures with a connection probability that decays exponentially with the level index. Such networks can be embedded in two-dimensional Euclidean space. We explore the dynamic behavior of the contact process (CP) and threshold models on networks of this kind, including hierarchical trees. While in the small-world networks originally proposed to model brain connectivity, the topological heterogeneities are not strong enough to induce deviations from mean-field behavior, we show that a Griffiths phase can emerge under reduced connection probabilities, approaching the percolation threshold. In this case the topological dimension of the networks is finite and extended regions of bursty, power-law dynamics are observed. Localization in the steady state is also shown via QMF. We investigate the effects of link asymmetry and coupling disorder and show that localization can occur even in small-world networks with high connectivity in case of link disorder." @default.
- W3102160731 created "2020-11-23" @default.
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- W3102160731 date "2015-09-24" @default.
- W3102160731 modified "2023-09-26" @default.
- W3102160731 title "Griffiths phases and localization in hierarchical modular networks" @default.
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- W3102160731 doi "https://doi.org/10.1038/srep14451" @default.
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