Supervised Theses

  • Programming interface for data acquisition of a protocol for remote access to resource-restricted IoT devices (Bachelor, May 2021)
  • Security Layer for a Remote Access and Data Acquisition Protocol (Master, November 2021)
  • Extension of a protocol for remote access and data aquisition for the Web of Things (Master, August 2022)
  • Application and evaluation of different types of homomorphic encryption for selected scenarios (Bachelor, September 2022)
  • Real-time algorithmic analysis of body posture to improve the execution of sports techniques (Bachelor, Januar 2024)

Topics for Theses

In our research we work on the modeling, analysis and longevity of Cyber-Physical Systems (CPS). Many components of CPS are developed and operated on the basis of models, that represent the assumed behavior of the CPS. Significant or continuous small changes in the CPS, as well as wear and tear, however, reduce the suitability between models and system behavior. Specifically, we are concerned with the question of how these models can be used for the CPS from the initial conception until it no longer sufficiently captures the CPS behavior. This includes, for example, the creation of benchmarks, data smoothing, the identification of flawed behavior, monitoring of suitability and the generation of suggestions for improvement to the model and/or CPS. We are currently researching these topics using a formalism that we have devised, based on hidden Markov models, and the simulation of a smart home system. If you are interested in any of these, please write to me and we can come up with a topic that fits the research area and your interests / skills.

Topics for theses that don’t regard my research

In my master’s thesis I developed a protocol that allows restricted devices to offer a user interface and data acquisition. The special thing about this paradigm is that the server has limited resources and not the client. Important principles when creating the protocol were therefore efficiency and interoperability without application knowledge. In other thesis that I supervised, work was already being carried out on this protocol. The API side of the server was examined in more detail and a security layer was added to the protocol stack. Due to the incremental nature of this protocol development, it is usually only possible to assign one thesis in this subject area at the same time. If you are interested in the protocol, its extension or any areas of application, please write to me!

Videos of Presentations

Talks

  • Towards Robust Models of Cyber-Physical Systems, UbiComp 2021 - ACM International Joint Conference on Pervasive and Ubiquitous Computing, September 26, 2021
  • Lifecycle-Based View on Cyber-Physical System Models Using Extended Hidden Markov Models, MEMOCODE'22 - 20th ACM-IEEE International Conference on Formal Methods and Models for System Design, Oktober 14, 2022
  • Modelling Emergent Behaviour for Enhanced Autonomy in Cyber-Physical Systems, EAI MobiQuitous 2023 - 20th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, AutoQuitous: First Workshop on Autonomous Ubiquitous Systems, November 14, 2023

Projects

Publications (8)

2024 (1)
  • Bernemann, Rebecca and König, Barbara and Schaffeld, Matthias and Weis, Torben
    Hidden Markov Models with Unobservable Transitions
    In: Taming the Infinities of Concurrency
    DOI: 10.1007/978-3-031-56222-8

2023 (2)
  • Schaffeld, Matthias and Weis, Torben
    Modelling Emergent Behaviour for Enhanced Autonomy in Cyber-Physical Systems
    In: Mobile and Ubiquitous Systems: Computing, Networking and Services - 20th EAI International Conference, MobiQuitous 2023, Melbourne, VIC, Australia, November 14–17, 2023, Proceedings, Part II
    DOI: 10.1007/978-3-031-63992-0_35
  • Zdankin, Peter and Picone, Marco and Schaffeld, Matthias and Mamei, Marco and Weis, Torben
    How to Change a Light Bulb in Your Smart Home: A Digital-Twin Based Approach
    In: PDT 2023: First Workshop on Pervasive Digital Twins
    DOI: 10.1109/PerComWorkshops56833.2023.10150349

2022 (1)
  • Schaffeld, Matthias and Bernemann, Rebecca and Weis, Torben and König, Barbara and Matkovic, Viktor
    Lifecycle-Based View on Cyber-Physical System Models Using Extended Hidden Markov Models
    In: Proceedings of the 2022 20th ACM-IEEE International Conference on Formal Methods and Models for System Design (MEMOCODE)
    DOI: 10.1109/MEMOCODE57689.2022.9954592

2021 (3)
  • Carl, Oskar and Zdankin, Peter and Schaffeld, Matthias and Matkovic, Viktor and Yu, Yang and Elbers, Timo and Weis, Torben
    Persistent Streams: The Internet With Ephemeral Storage
    In: Tagungsband des FG-BS Herbsttreffens 2021
    DOI: 10.18420/fgbs2021h-01
  • Zdankin, Peter and Schaffeld, Matthias and Carl, Oskar and Waltereit, Marian and Weis, Torben
    An Algorithm for Dependency-Preserving Smart Home Updates
    In: PerIoT 2021: 5th International Workshop on Mobile and Pervasive Internet of Things (PerIoT 2021)
    DOI: 10.1109/PerComWorkshops51409.2021.9431040
  • Schaffeld, Matthias and Weis, Torben
    Towards Robust Models of Cyber-Physical Systems
    In: Adjunct Proceedings of the 2021 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2021 ACM International Symposium on Wearable Computers
    DOI: 10.1145/3460418.3479314

2019 (1)
  • Agarwal, Aashish and Mandal, Ankita and Schaffeld, Matthias and Ji, Fangzheng and Zhang, Jihao and Sun, Yiqi and Aker, Ahmet
    Good, Neutral or Bad - News Classification
    In: Proceedings of the Third International Workshop on Recent Trends in News Information Retrieval, co-located with 42nd International ACM Conference on Research and Development in Information Retrieval (SIGIR 2019)

Teaching

WiSe 24/25

SoSe 2024

WiSe 23/24

SoSe 2023

WiSe 22/23

SoSe 2022

WiSe 21/22

SoSe 2021

WiSe 20/21

Matthias Schaffeld

Research Associate

Contact

  • Phone: +49 203 379 2726
  • E-Mail: matthias.schaffeld[@uni-due.de]

Postal address

  • Building BC, Room 312
  • Bismarckstr. 90 47057 Duisburg, Germany

Consultation hour

By appointment

Brief CV

Since 09/2020

Research and Teaching Associate, University of Duisburg-Essen

08/2020

Master of Science in Applied Computer Science, University of Duisburg-Essen

04/2018 - 09/2018

Student Tutor for the Programming Paradigms lecture, University of Duisburg-Essen

04/2017

Bachelor of Science in Applied Computer Science, University of Duisburg-Essen

12/2014 - 03/2019

Member of Student Council in Applied Computer Science, University of Duisburg-Essen

10/2014 - 08/2020

Student Tutor at the Chair for Theoretical Computer Science, University of Duisburg-Essen

10/2013 - 08/2020

Study of Applied Computer Science, University of Duisburg-Essen