北京大学定量生物学中心

学术报告 

题    目: Talkers and Listeners in Social and Biological Networks

报告人: Prof. Kim Sneppen

Niels Bohr Institute, Copenhagen University

时  间: 8月25日（周一）16:00-17:00

地    点: 吕志和楼B101

主持人: 汤超 教授

摘要:

Human communication often self-organizes around asymmetrical roles: talkers, who dominate speaking time and attract attention, and listeners, who form the attentive fabric of social life.  This talk introduces an agent-based model that captures how disparities in expression and attention drive emergent social structures.

In a broader context, the asymmetry between network nodes that regulate and network nodes that make things work is universal across life. In ecology, it is inherent in the directed links between a predator and its prey. In regulatory genetic networks, it is reflected in the partially modular hubs of genes around transcription factors and their target genes. I will give examples of regulatory gene networks, with their interplay of hubs and combinations of positive and negative regulation. As a final lesson from network biology, I will emphasize feedback types and the central role of positive feedback in sustaining complex life.

报告人简介：

Dr. Kim Sneppen obtained his PhD in Nuclear Physics in 1989. He was Assistant Professor at Nordita from 1995 to 2001, Professor at NTNU from 2001 to 2002, and Professor and center-director from 2005 to 2015. He has been a Member of the Royal Danish Academy of Sciences since 2006 and held an ERC advanced grant from 2017 to 2023. He has published >250 papers on many topics in complex systems and biological physics, including the Bak-Sneppen model for evolution, the theory of nucleosome-mediated epigenetics in Cell 2007, a model of morphogenesis in 2017, and superspreading in Covid-19 epidemics in 2021.