Welcome to the Chair of Systems Design

Our research can be best described as data driven modeling of complex systems, with particular emphasis on social, socio-technical, and socio-economic systems. We are a trully interdisciplinary team of about 20 people from various disciplines (statistical physics, applied mathematics, computer science, social science, engineering). And, yes, we do all the cool stuff, from big data analysis to multilayer network models, from social software engineering to predictions of scientific success - not to forget our research on polarization in political systems, cooperation in animal societies, and life cycles of R&D networks. Just click through our publications, funded projects, teaching or media coverage. 


Mastering the Challenges of our Digital Society

The workshop "Mastering the Challenges of our Digital Society" will be held on 4th October 2016. This Risk Center workshop is organized by Prof. Frank Schweitzer and Dr. David Garcia together with Thomas Steiger from Zurich Insurance Company and will address the challenges and opportunities of digitalization from the perspectives of three different stakeholders: citizens, companies and regulators.

More information on this workshop and the programme is available here.


SG Visualisation Contest

We have an internal contest on scientific visualisation here at the Chair of Systems Design.  By participating in it, not only we add to our fun of doing research, but we also develop additional skills in visual communication.

As soon as there are a few submissions, the winner is decided by the group.  The entry is then printed in large format, put in a frame and shown in the lounge area of the Chair.

Here we present the latest entry, submitted by Vahan Nanumyan.


Paper on Twitter presented at the IPP conference

The preprint related to our recent presentation at the The Internet, Policy & Politics Conference in Oxford is available at SocArxiv.

Check the online visualization of our results.


Position for computer science student

Our group has an open position for a computer science student for a project on text analysis.

More information on this position and how to apply are available here.


Invited Talk at ICSE 2016

We are proud to announce that our article From Aristotle to Ringelmann: a large-scale analysis of team productivity and coordination in Open Source Software projects was invited as Journal-First contribution for a talk at ICSE 2016, the world's premier software engineering venue. In our work, which is part of our research line on social software engineering, we use data science techniques to provide quantitative evidence for Brook's law in Open Source communities. On May 18 2016 Ingo Scholtes will present our results in the main research track of ICSE 2016 in Austin, TX, USA.


Postdoc Position (data-driven modeling)

We welcome applications for a vacant postdoc position in the context of data-driven modeling. We offer excellent working conditions in a lively interdisciplinary team as well as a competitive salary.

More information on this position and how to apply is available here.


How does the productivity of teams scale with size?

We are happy to announce that our article "From Aristotle to Ringelmann: a large-scale analysis of team productivity and coordination in Open Source Software projects" has now been published in the journal Empirical Software Engineering. Using a data set of 58 OSS projects with more than 580,000 commits contributed by more than 30,000 developers, in this article we provide a large-scale analysis of the relation between size and productivity of software development teams.


Temporal Network Analysis in Python

Today, we proudly present an in-depth educational tutorial showing how to analyze non-Markovian temporal networks using the python module pyTempNet which was recently developed at our chair. The tutorial features an interactive and hands-on introduction to our latest theoretical works on the analysis of time-stamped relational data. It demonstrates how our methods can be used to analyze the effect of order correlations in time-stamped network data, specifically showing how to analyze, simulate and visualize the effect of non-Markovian characteristics on dynamical processes.

The tutorial is available here.


Wikipedia research in the news

Our research in colaboration with GESIS Cologne has been featured in the news:

The results of our research are motivating editorial changes in Wikipedia:


How many developers does it take to complete a project?


Research covered by IEEE Software Blog


When Network Science Meets Software Engineering

On April 20, Ingo Scholtes will give an invited guest lecture in the special lecture series of the Elite Graduate Program in Software Engineering at Augsburg University, Germany. The lecture with the title "When Network Science meets Software Engineering" will introduce challenges and opportunities in the application of network-based data mining methods in the quantitative study of collaborative software engineering processes.


The Rise and Fall of R&D Networks

How are R&D networks structured? What are the driving forces behind the formation of inter-firm alliances? What are the reasons of the "rise and fall" trend exhibited by all industrial sectors in the last decades? These and more questions are answered in the latest version of our paper "The Rise and Fall of R&D Networks", now available on SSRN and ArXiv. Check also the nice visual example presented in the following video.


Multinet.js: Graph visualizer in the browser

We are happy to introduce Multinet.js - a visualization framework for large, dynamic and multi-layered graphs developed by the Chair of Systems Design.