Dear Nedoers,

I hope to find you well and safe!

The OnliNedo season 2020/2021 is going to finish with the last seminar: Martin Rosvall from Umeå University is going to give the seminar entitled Mapping flows on weighted and directed networks with incomplete observations. The talk is going to be held on Google Meet at the link https://meet.google.com/hys-dmpy-axh on Wednesday 12th of May at 14:30.

Abstract: Detecting significant community structure in networks with incomplete observations is challenging because the evidence for specific solutions fades away with missing data. For example, recent research shows that flow-based community detection methods can highlight spurious communities in sparse undirected and unweighted networks with missing links.

Missing link observations in weighted and directed networks aggravate this overfitting problem since each link carries more information.

To address this problem, here we extend the idea behind the Bayesian estimate of the map equation for unweighted and undirected networks to enable more robust community detection in weighted and directed networks. We derive a weighted and directed prior network that can incorporate metadata information and show that an efficient implementation in the community-detection method Infomap provides more reliable communities even with a significant fraction of the data missing.

Be there and stay tuNedo and safe!

Nedo