SCCS Colloquium

The SCCS Colloquium is a forum giving students, guests, and members of the chair the opportunity to present their research insights, results, and challenges. Do you need ideas for your thesis topic? Do you want to meet your potential supervisor? Do you want to discuss your research with a diverse group of researchers, rehearse your conference talk, or simply cheer for your colleagues? Then this is the right place for you (and you are also welcome to bring your friends along).

Upcoming talks

Uppili Srinivasan: Dynamic Mode Decomposition for Multi-scale Analysis of Crowd Simulation

SCCS Colloquium |


This work presents an operator-informed approach to analyze patterns of crowd density during evacuation scenarios using Dynamic Mode Decomposition (DMD) and its variants (Extended Dynamic Mode Decomposition - EDMD) to approximate the Koopman operator. The study aims to gain valuable insight into pedestrian behavior and optimize evacuation strategies using mesoscopic data such as crowd density. The utilization of time delay embedding (TDE) to construct a richer dataset from the mesoscopic data allows more accurate approximations of the Koopman operator.
The research involves the collection of crowd behavior data of position and speed through simulations of bottleneck scenarios within Vadere software. The position and speed data are further mapped to a mesoscopic representation of crowd density in triangular meshes. This cellular automata pattern or triangular meshes are constructed in the topography of the scenario itself during simulation. This dataset serves as the foundation for constructing state space representations, where crowd density is defined as an explicit discrete time-invariant parameter.
The triangular meshes are chosen due to ease of quantification and computation. By employing DMD techniques, the data is decomposed into modes, enabling the computation and prediction of key macroscopic parameters such as the number of pedestrians evacuated from an area and further providing reconstruction of new test cases. The results showcase the application and efficacy of DMD and its variants (EDMD) in capturing the underlying dynamics of crowd movement, particularly in bottleneck scenarios. This includes optimizing the model by performing hyperparameter tuning of attributes involved in TDE and DMD. The computed outputs offer valuable insights into the spatio-temporal evolution of crowd density, aiding in the identification of critical congestion points and optimal evacuation routes.
The work demonstrates the applicability of DMD and EDMD as a useful tool for analyzing complex crowd dynamics and predicting the evolution of crowd density patterns. The results provide the importance and benefits of considering crowd density in triangular meshes or grids within a state space framework for a better understanding of pedestrian flow and crowd management in bottleneck scenarios.

Master's thesis presentation. Uppili is advised by Ana Cukarska, Dr. Daniel Lehmberg and Prof. Dr. Felix Dietrich.


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Contribute a talk

To register and schedule a talk, you should fill the form Colloquium Registration at least two weeks before the earliest preferred date. Keep in mind that we only have limited slots, so please plan your presentation early. In special cases, contact colloquium@mailsccs.in.tum.de.

Colloquium sessions are now on-campus. We have booked room MI 02.07.023 for SS2024. You can either bring your own laptop or send us the slides as a PDF ahead of time. The projector only has an HDMI connection, so please bring your own adapters if necessary.

Do you want to attend but cannot make it in person? We now have a hybrid option. Simply join us through this BBB room: https://bbb.in.tum.de/shu-phv-eyq-rad

We invite students doing their Bachelor's or Master's thesis, as well as IDP, Guided Research, or similar projects at SCCS to give one 20min presentation to discuss their results and potential future work. The time for this is typically after submitting your final text. Check also with your study program regarding any requirements for a final presentation of your project work.

New: In regular times, we will now have slots for presenting early stage projects (talk time 2-10min). This is an optional opportunity for getting additional feedback early and there is no strict timeline.

Apart from students, we also welcome doctoral candidates and guests to present their projects.

During the colloquium, things usually go as follows:

  • 10min before the colloquium starts, the speakers setup their equipment with the help of the moderator. The moderator currently is Ana Cukarska. Make sure to be using an easily identifiable name in the online session's waiting room.
  • The colloquium starts with an introduction to the agenda and the moderator asks the speaker's advisor/host to put the talk into context.
  • Your talk starts. The scheduled time for your talk is normally 20min with additional 5-10min for discussion.
  • During the discussion session, the audience can ask questions, which are meant for clarification or for putting the talk into context. The audience can also ask questions in the chat.
  • Congratulations! Your talk is over and it's now time to celebrate! Have you already tried the parabolic slides that bring you from the third floor to the Magistrale?

Do you remember a talk that made you feel very happy for attending? Do you also remember a talk that confused you? What made these two experiences different?

Here are a few things to check if you want to improve your presentation:

  • What is the main idea that you want people to remember after your presentation? Do you make it crystal-clear? How quickly are you arriving to it?
  • Which aspects of your work can you cover in the given time frame, with a reasonable pace and good depth?
  • What can you leave out (but maybe have as back-up slides) to not confuse or overwhelm the audience?
  • How are you investing the crucial first two minutes of your presentation?
  • How much content do you have on your slides? Is all of it important? Will the audience know which part of a slide to look at? Will somebody from the last row be able to read the content? Will somebody with limited experience in your field have time to understand what is going on?
  • Are the figures clear? Are you explaining the axes or any other features clearly?

In any case, make sure to start preparing your talk early enough so that you can potentially discuss it, rehearse it, and improve it.

Here are a few good videos to find out more:

Did you know that the TUM English Writing Center can also help you with writing good slides?

Work with us!

Do your thesis/student project in Informatics / Mathematics / Physics: Student Projects at the SCCS.