The complex systems group has published a paper in a recent Featured Collection in the journal Materials Theory entitled Characterization of dislocation ensembles: measures and complexity, and the group leader has participated in editing the collection together with other guest editors Thomas Hochrainer, Stefanos Papanikolaou, Giacomo Po, and Ryan Sills. The collection is open access and consists of 7 papers written by some of the leading scientists in the field of dislocation plasticity, as well as an editorial.