197 citations · 632 across the 59 of their papers we have counts for
6 papers · 1 filter
A two-phase model of collective memory decay with a dynamical switching point
Naoki Igarashi, Yukihiko Okada, Hiroki Sayama +1
Public memories of significant events shared within societies and groups have been conceptualized and studied as collective memory since the 1920s. Thanks to the recent advancement…
Enhanced Ability of Information Gathering May Intensify Disagreement Among Groups
Hiroki Sayama
Today's society faces widening disagreement and conflicts among constituents with incompatible views. Escalated views and opinions are seen not only in radical ideology or extremis…
Graph Product Multilayer Networks: Spectral Properties and Applications
Hiroki Sayama
This paper aims to establish theoretical foundations of graph product multilayer networks (GPMNs), a family of multilayer networks that can be obtained as a graph product of two or…
Invasion of cooperation in scale-free networks: Accumulated vs. average payoffs
Genki Ichinose, Hiroki Sayama
It is well known that cooperation cannot be an evolutionary stable strategy for a non-iterative game in a well-mixed population. In contrast, structured populations favor cooperati…
Visualizing the "Heartbeat" of a City with Tweets
Urbano França, Hiroki Sayama, Colin McSwiggen +2
Describing the dynamics of a city is a crucial step to both understanding the human activity in urban environments and to planning and designing cities accordingly. Here we describ…
Evolution of Fairness in the Not Quite Ultimatum Game
Genki Ichinose, Hiroki Sayama
The Ultimatum Game (UG) is an economic game where two players (proposer and responder) decide how to split a certain amount of money. While traditional economic theories based on r…