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Throughout the school year 2022-2023, the exhibition "IMAGINARY: beauty and power of mathematics" could be visited and experienced in various cities across the Netherlands. In The Netherlands, the IMAGINARY exhibition was organized by the Dutch Platform for Mathematics, in collaboration with Dutch universities, and supported by partner organizations. The exhibition runs simultaneously in Flanders, where the Flanders Platform for Mathematics is the driving force. 

In the exhibition, you could also see four posters on networks and algorithms! These were made in collaboration with various people. One of these posters is about Communication Networks. This poster was made by Anna Priante from the Rotterdam School of Management.

The poster can be seen below. Below the poster in English, you can read more details about this modern line of research.   

From tweets to communication networks

Network visualizations have the power to display how we communicate with each other in social media. We can simply depict message exchanges using communication networks. In such a network, nodes represent users, and there exists an edge between two nodes when the corresponding users exchange information (an email or a tweet).

In this poster, network visualizations showcase the evolution of communication between Twitter users before, during and after the 2014 US Movember health campaign organized by the Movember Foundation, a social movement organization that raises awareness of prostate and testicular cancer.  Those visualizations unravel interesting dynamics, showing that communication is centered around a core of nodes that mostly converse with each other. Over time, this structure is maintained yet, as the campaign unfolds, people decrease their active participation, and move to the periphery of the network or even leave the network.

The networks shown were created using tweets provided by the Twitter Datagrant Project (University of Twente). Each visualization represents a specific phase of the campaign, namely,

1: the pre-campaign, or launching, phase from 15 to 31 October 2014;

2: the campaign’s first two weeks, from 1 to 15 November 2014;

3: the campaign’s second two weeks, from 16 to 30 November 2014;

4: and the post-campaign phase, from 1 to 15 December 2014.

Nodes represent the people who tweeted using #hashtags (i.e., markers of content) related to the campaign. Edges have different colors depending on the type of tweet that was exchanged: red for mentions, blue for retweets, green for replies and orange for regular tweets.

The network visualizations were realized using Fruchterman Reingold, Force Atlas 2, and Yifan Hu Proportional algorithms provided by the Gephi software.


NETWORKS has collaborated with four more scientists to make posters about their research for IMAGINARY. The three other posters concern the following topics:

  • The Travelling Salesman Problem. The poster was created by Frans de Ruiter who works at the Dutch Data Science Company CQM in Eindhoven. Want to see the poster? Have a look at this short post!
  • Dispatching experts to do maintenance. The poster was created by Stella Kapodistria, assistant professor in the section Stochastics of the Department of Mathematics and Computer Science at the Eindhoven University of Technology, and Peter Verleijsdonk, Doctoral Candidate at the Eindhoven University of Technology. Want to read more about this poster? Have a look at this post!
  • Structure in social networks. The poster was created by Clara Stegehuis, assistant professor at Twente University.