Analysis of Internet services as Biological Evolution systems

This project is to unravel the extent to which web systems can become life systems. There are interesting "fluctuation" and "response" relationships, but we are looking for evolutionary novelties that go beyond such statistical mechanical properties.  For example, we have shown that web services are evolving toward a critical state (such that a single post can have a large spillover). At the same time, we observed that user groups were creating distinctive group structures. By comparing tagging services, we found a phenomenon that cannot be explained by a simple mathematical model (Yule-Simon model). In particular, the creation of "meaning" on the Web is not the evolution of new tags, but the evolution of combinations of tags. In particular, by bringing in parent-child relationships between posts, he has drawn an evolutionary genealogy of 400 weeks of data and analyzed it.

Takashi Ikegami, Yasuhiro Hashimoto and Mizuki Oka. Open-Ended Evolution and a Mechanism of Novelties in Web Services. Artificial Life, 2019 25:2, pp.168-177.

Tim Taylor, Mark Bedau, Alastair Channon, David Ackley, Wolfgang Banzhaf, Guillaume Beslon, Emily Dolson, Tom Froese, Simon Hickinbotham, Takashi Ikegami, Barry McMullin, Norman Packard, Steen Rasmussen, Nathaniel Virgo, Eran Agmon, Edward Clark, Simon McGregor, Charles Ofria, Glen Ropella, Lee Spector, Kenneth O. Stanley, Adam Stanton, Christopher Timperley, Anya Vostinar and Michael Wiser: Open-Ended Evolution: Perspectives from the OEE Workshop in York, Artificial Life vol 22(3) pp. 408-423, 2016.

Yasuhiro Hashimoto: Growth fluctuation in preferential attachment dynamics, Phys. Rev. E 93, 042130, 2016.

Takashi Ikegami, Mizuki Oka: Massive Data Flows: Self-organization of energy, material, and information flows. 6th International Conference on Agents and Artificial Intelligence ICAART 2014, pp. 237-242, 2014.

Mizuki Oka, Yasuhiro Hashimoto, Takashi Ikegami : Self-organization on social media: endo-exo bursts and baseline fluctuations, PLoS ONE, 9(10): e109293. doi:10. 1371/journal.pone.0109293, 2014.

Mizuki Oka and Takashi Ikegami: Exploring Default Mode and Information Flow on the Web. PLoS ONE, 8(4): e60398, 2013.