29 شهریور 1400

پویا منشور

مرتبه علمی:
نشانی: دانشکده علوم و فناوری نانو و زیستی - گروه فیزیک
تحصیلات: فیزیک
تلفن:
دانشکده: دانشکده علوم و فناوری نانو و زیستی

مشخصات پژوهش

عنوان Low prevalence, quasi-stationarity and power-law behavior in a model of contagion spreading
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
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مجله EPL
شناسه DOI 10.1209/0295-5075/99/58002
پژوهشگران افشین منتخب (نفر اول) ، پویا منشور (نفر دوم)

چکیده

While contagion (information, infection, etc.) spreading has been extensively studied recently, the role of active local agents has not been fully considered. Here, we propose and study a model of spreading which takes into account the strength or quality of contagions as well as the local probabilistic dynamics occurring at various nodes. Transmission occurs only after the quality-based fitness of the contagion has been evaluated by the local agent. We study such spreading dynamics on Erd?s-Rényi as well as scale free networks. The model exhibits quality-dependent exponential time scales at early times leading to a slowly evolving quasi-stationary state. Low prevalence is seen for a wide range of contagion quality for arbitrary large networks. We also investigate the activity of nodes and find a power-law distribution with a robust exponent independent of network topology. These properties, while absent in standard theoretical models, are observed in recent empirical observations.