36 citations · 189 across the 22 of their papers we have counts for
22 papers
Enhanced robustness of evolving systems with bipartite topology
Fumiko Ogushi, Kimmo Kaski, Takashi Shimada
Evolving open systems, in which new entities are continually introduced and those turning unfit go extinct, exhibit a phase transition between a diverging phase, where the system s…
A simple model of edit activity in Wikipedia
Takashi Shimada, Fumiko Ogushi, Janos Torok +2
A simple dynamical model of collective edit activity of Wikipedia articles and their content evolution is introduced. Based on the recent empirical findings, each editor in the mod…
Balanced-imbalanced transitions in indirect reciprocity dynamics on networks
Koji Oishi, Shuhei Miyano, Kimmo Kaski +1
Here we investigate the dynamics of indirect reciprocity on networks, a type of social dynamics in which the attitude of individuals, either cooperative or antagonistic, toward oth…
On the relation between active population and infection rate of COVID-19
Takashi Shimada, Yoshiyuki Suimon, Kiyoshi Izumi
The relation between the number of passengers in the main stations and the infection rate of COVID19 in Tokyo is empirically studied. Our analysis based on conventional compartment…
Temporal inactivation enhances robustness in an evolving system
Fumiko Ogushi, János Kertész, Kimmo Kaski +1
We study the robustness of an evolving system that is driven by successive inclusions of new elements or constituents with random interactions to older ones. Each constitutive…
Enhanced robustness of evolving open systems by the bidirectionality of interactions between elements
Fumiko Ogushi, János Kertész, Kimmo Kaski +1
Living organisms, ecosystems, and social systems are examples of complex systems in which robustness against inclusion of new elements is an essential feature. A recently proposed…