Dr Ulrich Matthias Speidel
- 1992: Came to NZ with the equivalent of a BSc from Germany. Undertook MSc studies in physics at the University of Auckland. The thesis was about signal processing for underwater acoustics used in a climatology experiment.
- 1994: Graduated MSc with 1st Class Honours. Later in that year, I started a PhD under Mark Titchener, on T-Codes.
- 2000: Got bored with just business and decided to get back into academia. That's why I'm here.
More on my home page
Research | Current
- Anything that's fun!
- Network coding over satellite and other long latency links
Did you know that Internet via satellite often doesn't use the expensive satellite link very efficiently? Network coding can potentially help, but in order to get there, we need to experiment a lot. For this purpose, we operate the Auckland Internet Satellite Simulator.
- T-Codes and T-information theory
To understand T-information theory, you'll need to understand T-Codes. To understand T-Codes, you must first understand T-Codes. If this confuses you, talk to me.
- Complexity in time series data and the use of information measures in detection and decision-making, e.g., in the detection of network events or similarity comparisons in noisy data
- Sustainabilty of real-time protocols on the Internet
Ever wondered why VoIP applications such as Skype seem to continue to (just) work on Internet infrastructure that wasn't built for it? So am I.
- Web application programming and security
Teaching | Current
Currently: COMPSCI110 Introduction to Computer Systems, COMPSCI314 Modern Data Communications
Tuakana coordinator for Computer Science, along with Simone Linz and David Welch
Areas of expertise
Data communications, information theory, satellite Internet, satellite communication, network measurement, codes, data compression, signal processing, network coding, web applications, web security
Selected publications and creative works (Research Outputs)
- Seo, J. O., Manoharan, S., & Speidel, U. (2019). Steganalysis of Storage-based Covert Channels Using Entropy. 2019 29th International Telecommunication Networks and Applications Conference, ITNAC 2019. 10.1109/ITNAC46935.2019.9078009
Other University of Auckland co-authors: Sathiamoorthy Manoharan
- Denny, P., Manoharan, S., Speidel, U., Russello, G., & Chang, A. (2019). On the fairness of multiple-variant multiple-choice examinations. SIGCSE 2019 - Proceedings of the 50th ACM Technical Symposium on Computer Science Education. 10.1145/3287324.3287357
Other University of Auckland co-authors: Sathiamoorthy Manoharan, Giovanni Russello, Paul Denny
- Liu, X., Speidel, U., & Tu, W. (2018). RAODV: An Entropy-based Congestion Control for the AODV Routing Protocol. Paper presented at The 2018 Asia Pacific Advanced Network Research Workshop, Auckland, New Zealand. 6 August - 6 August 2018. Proceedings of the 15th APAN Research Workshop 2018.
Other University of Auckland co-authors: Wanqing Tu
- Dinneen, M. J., & Speidel, U. (2018). Preface. Natural Computing, 17 (2), 295-295. 10.1007/s11047-016-9592-z
Other University of Auckland co-authors: Michael Dinneen
- Speidel, U., Qian, L., Cocker, E., Medard, M., Vingelmann, P., & Heide, J. (2017). Simulating the network dynamics of shared satellite channels: Bringing the Internet to the last few million. Paper presented at APNIC 44: Asia Pacific Network Information Centre 44th Annual Conference, Taichung, Taiwan. 12 September - 14 September 2017.
- Speidel, U., Qian, L., Medard, M., Vingelmann, P., & Heide, J. (2017). Simulating shared Internet satellite links to remote islands: Bringing the Internet to the last few million. Paper presented at ICCNA 2017: International Conference on Computer and Network Applications, 2017, Sabah, Malaysia. 5 September - 6 September 2017.
- Speidel, U. M., Cocker, E., Médard M, Vingelmann, P., & Heide, J. (2017). Topologies for the provision of network-coded services via shared satellite channels. In T. Pham (Ed.) SPACOMM 2017: The Ninth International Conference on Advances in Satellite and Space Communications, 7-12. Venice, Italy.
- Rebenich, N., Gulliver, T. A., Neville, S., & Speidel, U. (2017). An analog of the prime number theorem for finite fields via truncated polylogarithm expansions. Mathematics of Computation, 1-1. 10.1090/mcom/3247