Ulrich Speidel
personal information
- Contact
Lecturer
Department of Computer Science
University of Auckland
Building 731, Tamaki - 331
Auckland
New Zealand
Phone: 649 373 7599
Email: ulrich@cs.auckland.ac.nz- Biography
Ulrich Speidel trained as a physicist in Germany and NZ, qualifying with an MSc in Physics from the University of Auckland in 1994. Physicists love to model things to gain an understanding of the world and to develop solutions for it. Ulrich went on to apply this in Computer Science, qualifying with a PhD from Auckland in 1998, and subsequently in business and as a researcher in Computer Science at the University of Auckland. His work in data communications and developing dynamic web applications (and frequent contact with inbound travellers and students) led to an interest in applying ICT in the area of tourism. As a result, he now "moonlights" at the NZ Tourism Research Institute at AUT University as the Associate Director for Tourism and Technology. His research interest in the area includes both ICT for community-based tourism and the needs of the interactive, interconnected traveller.
- Qualifications
- 1994 - 1998: Completion of a PhD in Computer Science at the University of Auckland under the supervision of Dr. Mark Titchener on “Robust Source Coding with Generalized T-Codes”.
- 1992 - 1994: Completion of an MSc in Physics with First Class Honours at the University of Auckland. The thesis topic was “The Heard Island Feasibility Test: Sample File Processing and Simulation”.
- 1988 – Feb 1992: Undergraduate studies in Physics at the Friedrich-Alexander University of Erlangen-Nuremberg, Germany.
- Publications
SPEIDEL, U.M., BROWNLEE, J.N., EIMANN, R.E.A. 'Entropy Techniques for Network Event
Detection', Mediterranean Journal of Computers and Networks, 4, (1), p20-29, 2008
SPEIDEL, U.M. 'Constructing finite pseudo-random strings using codeset-based entropy measures',
IEE Proceedings - Circuits Devices and Systems, 153, (4), p315-319, 2006
SPEIDEL, U.M., MILNE, S., GOODMAN, T., WEST-NEWMAN, T. 'Tourism and community
informatics: the case of Kiwitrails', Tourism Culture and Communication, 5, (2), p93-104, 2005
TITCHENER, M.R., GULLIVER, A., NICOLESCU, R., SPEIDEL, U.M., STAIGER, L. 'Deterministic
Complexity and Entropy', Fundamenta Informaticae, 64(1-4), p443-461, 2005
SPEIDEL, U.M., YANG, J.'A Fast T-decomposition Algorithm', Journal for Universal Computer
Science, 11, (6), p1083-1101, 2005, http://www.jucs.org/jucs_11_6/a_fast_t_decomposition (impact
factor 0.34)
* COSTEA, I., NICOLESCU, R. GÜNTHER, U. “Coping with File Formats on the Internet",
Computer Communications 20, 16, p1437-1447, Jan. 1998.
* GÜNTHER, U., HERTLING, P., NICOLESCU, R., TITCHENER, M. "Representing Variable-Length
Codes in Fixed-Length T-Depletion Format in Encoders and Decoders", Journal of Universal
Computer Science (J.UCS), 3(11), p1207, Nov. 1997.
* GÜNTHER, U., TITCHENER, M. "Calculating the Expected Synchronisation Delay for T-Code
Sets", IEE Proceedings (Communications), 144(3), p121, June 1997.* GÜNTHER, U. "Data Compression and Serial Communication with Generalized T-Codes", in
Journal of Universal Computer Science (J.UCS), Vol. 2, No. 11, page 769, Nov. 28, 1996.
2005
Milne, S, Mason, D, Guenther, U and West-Newman, T 2005 Tourism and community informatics: the case of Kiwitrails, Tourism, Culture and Communication 5 (2) 105-114Milne, S, Speidel, U, T Goodman and V Clark 2005 Tourism ICT and Regional Economic Development: the case of Kiwitrails, in Frew, A (ed) Information and Communication Technologies in Tourism , Springer Wein, New York, 114-124
- Presentations
SPEIDEL, U.M. ‘A Note on the Estimation of String Complexity’, accepted for publication in the
proceedings of the 7th International Conference on Information, Communications & Signal
Processing, ICICS2007, Macau, 6-10 December 2009 (invited paper)
SPEIDEL, U.M. 'A note on BSD codes constructed from T-codes', Proceedings of the 2009 IEEE
International Symposium on Information Theory (ISIT2009), Seoul, Korea, 28th June – 3rd July
2009, p.2418-2421 (acceptance rate 62%)
SPEIDEL, U.M. 'On the Maximum Shannon Entropy of the Full State Space of a T-Code Decoder',
2008 International Symposium on Information Theory and its Applications (ISITA2008), Auckland,
7-10 December 2008, p.1101-1104 (acceptance rate 78%)
SPEIDEL, U.M. 'On the bounds of the Titchener T-complexity', 6th International Symposium on
Communication Systems, Networks and Digital Signal Processing (CNSDSP 2008), Graz, 23-25
July 2008, p.321-325 (acceptance rate approximately 72%)
SPEIDEL, U.M., EIMANN, R.E.A., BROWNLEE, J.N. 'Detecting network events via T-entropy', 6th
International Conference on Information, Communications & Signal Processing, ICICS2007,
Singapore, 10-13 Dec. 2007, p.1-5 (acceptance rate approximately 51%)
SPEIDEL, U.M., GULLIVER, T.A. 'Synchronizing block codes with a decoder for variable-length
codes', Proceedings of the 2007 IEEE International Symposium on Information Theory (ISIT2007),
Nice, France, 24th - 29th June 2007, p.1661-1664 (acceptance rate 59.8%)
SPEIDEL, U.M., TITCHENER, M.R., YANG, J. 'How well do practical information measures
estimate the Shannon entropy?', M.D. Logothetis and Z. Ghassemlooy (eds.), Proceedings of 5th
International Symposium on Communications Systems, Networks and Digital Signal Processing
(CSNDSP2006), University of Patras, Greece, 19-21 July 2006, p.861-865 (acceptance rate 70%)
KAWAHARADA, K., OHZEKI, K., SPEIDEL, U.M. 'Information and Entropy Measurements on Video
Sequences', Proceedings of the 5th International Conference on Information, Communications and
Signal Processing (ICICS2005), Bangkok, 6-9 December 2005, p.1150-1154 (acceptance rate 50%)
EIMANN, R., SPEIDEL, U.M., BROWNLEE, J.N. 'A T-entropy Analysis of the Slammer Worm
Outbreak', Proceedings of the Asia-Pacific Network Operations and Management Symposium
(APNOMS2005), Okinawa, 27-30 September 2005, p.434-445 (acceptance rate for 2005 is
unknown but APNOMS usually accepts between 20% and 50% of submissions)
YANG, J., SPEIDEL, U.M. 'A T-decomposition algorithm with O(n log n) time and space complexity',
Alex Grant and Rodney A. Kennedy (eds.), Proceedings of the IEEE International Symposium on
Information Theory 2005, Adelaide, 4-9 September 2005, p.23-27, available via IEEEXplore and on
CDROM from IEEE (acceptance rate 62%)
YANG, J., SPEIDEL, U.M. 'String Parsing-based Similarity Detection', M. J. Dinneen, D. Taylor, and
U. Speidel (eds.), Proceedings of the IEEE ITSOC Information Theory Workshop 2005, Rotorua, 29
August - 1 September 2005, p.263-267, on CD, IEEE Catalog number 05EX1207C (acceptance
rate 68%)
SPEIDEL, U.M., MILNE, S., GOODMAN, T., CLARK, V. 'Tourism, ICT and Regional Economic
Development: the case of Kiwitrails', Frew (ed.), Proceedings of Information and Communication
Technologies in Tourism 2005, Innsbruck, early 2005 (acceptance rate unknown)
SPEIDEL, U.M. ‘Constructing finite pseudo-random strings using a codeset-based entropy
measure', 4th International Symposium on Communication Systems, Networks & Digital Signal
Processing (CSNDSP2004), Newcastle-upon-Tyne, 19-22 July 2004, p.91-91. This paper won a
best paper award.
SPEIDEL, U.M., JIA, Y. 'An Improved T-Decomposition Algorithm', ICICS-PCM03, Proceedings of
ICICS-PCM03, 3, Singapore, 15-18 December 2003, p.1551-1555, IEEEXplore Digital Object
Identifier 10.1109/ICICS.2003.1292727 (acceptance rate 74%)
SPEIDEL, U.M., MASON, D., MILNE, S. 'Community informatics in tourism', Proceedings of the
Second National Conference on Technology Futures, Sunshine Coast, Queensland, Australia, 23
July 2003, p.39-45 (acceptance rate unknown)
SPEIDEL, U.M., JIA, Y. 'T-information: A New Measure for Similarity Comparison', 3rd Conference
on Discrete Mathematics and Computer Science (DMTCS03), Proceedings, Dijon, July 2003, p.29-
39 (acceptance rate 71%)
SPEIDEL, U.M. 'An Entropy Measure for Finite Strings based on the Shannon Entropy of a Code
Set', Proceedings of the 2003 IEEE International Symposium on Information Theory (ISIT2003),
Yokohama, Japan, June 29 - July 4, 2003, p.25-25 (acceptance rate unknown)
* GÜNTHER, U.M., MASON, D.M., MILNE, S., GOODMAN, T. 'Community Informatics in NZ:
Applying an automated internet development tool', Proceedings of the 4th IT in Regional Areas
Conference (ITiRA), Rockhampton, Australia, 26-29 August 2002, p.189-201 (acceptance rate
unknown)
* GÜNTHER, U.M. "T-Code Self-Synchronization and Pattern Decoding in the T-Complexity
Measure, 3rd International Symposium on Communication Systems, Networks & Digital Signal
Processing (CSNDSP2002), Stafford, UK, July 2002, p. 418 (acceptance rate unknown)
* GÜNTHER, U.M. ‘Matching T-codes to a source', Proceedings of the 3rd Intl. Conference on
Information, Communications, and Signal Processing (ICICS2001), Singapore, November 2001,
Paper 1A1.1 on CD, 5 pages when printed (acceptance rate 68%)
* GÜNTHER, U.M. 'Similarity Searches Using a Recursive String Parsing Algorithm', 2nd
International Conference on Unconventional Models of Computation, UMC2K, I. Antoniou, C.S.
Calude, and M.J. Dinneen (ed.), Supplemental Papers for the 2nd Unconventional Models of
Computation Conference, Brussels, 13 - 16 December 2000, p.56-63, (acceptance rate unknown)
* GÜNTHER U.M., ASSANOVICH, B. ''Variable-Length Codes for Sources with Equiprobable
Symbols'', 2000 International Symposium on Information Theory and Its Applications, Honolulu,
Hawaii, 5-8 November 2000, p.244-247 (acceptance rate 84%)
* COSTEA, I., NICOLESCU, R. GÜNTHER, U. "Collaborative Engineering on the Web", CESA'98,
Conference Proceedings, IMACS Multiconference, Symposium on Industrial and Manufacturing
Systems, Nabeul-Hammamet, Tunisia, 1-4 April 1998, p. 373 (acceptance rate unknown)
* NICOLESCU, R. GÜNTHER, U. "A Low-Cost Decoder for Arbitrary Binary Variable-Length
Codes", Proceedings, First Joint Australia & New Zealand biennial conference on Digital Image &
Vision Computing Techniques and Applications (DICTA/IVCNZ'97), 10-12 December 1997, Massey
University (Albany), Auckland, p. 279 (acceptance rate unknown)
* GÜNTHER, U., TITCHENER, M. “Calculating the Expected Synchronisation Delay for T-Code
Sets", Conference Proceedings, AVSPN’97: International Workshop on Audio and Video Services
over Packet Networks, Robert-Gordon-University Aberdeen, Scotland, 15-16 September 1997, p.
71
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