1. Thompson, A. M., Porr, B. and Wörgötter, F. Learning and Reversal in the Sub-cortical Limbic System: A Computational Model, Adaptive behavior (accepted for publication)
2. Kolodziejski, C., Porr, B. and Wörgötter, F. (2009) On the asymptotic equivalence between differential Hebbian and temporal difference learning In Neural Computation, 21(4): 1173-1202
3. Waddel C, Pratt JA, Porr B and Ewing S (2009) Deep Brain Stimulation Artifact Removal Through Under-Sampling and Cubic-Spline Interpolation. In: 2nd International Congress on Image and Signal Processing, 17-19 Oct, Tianjin, China. Eds: Peihua Qiu, Cedric Yiu, Hua Zhang and Xianbing Wen. Vol 8.
4. Porr B and Wörgötter, F. (2009) Modeling Spike Timing Dependent Plasticity with a retrograde transmitter. Computational Neuroscience (CNS*2009) Don H Johnson, Ranu Jung, Udo Ernst BMC Neuroscience 2009, 10(Suppl 1):I1 (13 July 2009)
5. Thompson AM, Porr B, and Wörgötter, F (2009) Behavioral inhibition during reversal learning in the limbic system: A computational model. Computational Neuroscience (CNS*2009) Don H Johnson, Ranu Jung, Udo Ernst BMC Neuroscience 2009, 10(Suppl 1):I1 (13 July 2009)
6. Thompson AM, Porr B, Egerton AD, and Wörgötter, F (2009) Reversal learning in teh Sub-cortical limbic system: A computational model. In: BNA meeting, Liverpool, Adelphi.
7. Di Prodi P, Porr B and Wörgötter F (2009). A novel information measure to understand differentiation in social systems. Frontiers in Computational Neuroscience. Conference Abstract: Bernstein Conference on Computational Neuroscience. doi: 10.3389/conf.neuro.10.2009.14.040
8. Kulvicius T, Kolodziejski C, Prodi P, Tamosiunaite M, Porr B and Wörgötter F (2008). On the analysis and evaluation of closed loop learning systems. Frontiers in Computational Neuroscience. Conference Abstract: Bernstein Symposium 2008. doi: 10.3389/conf.neuro.10.2008.01.078
9. Di Prodi, P. Porr, B. Wörgötter, F. (2008) Adaptive Communication Promotes Sub-system Formation in a Multi Agent System with Limited Resources. In: Learning and Adaptive Behaviors for Robotic Systems, 2008. LAB-RS '08. ECSIS Symposium
10. McCabe L., Porr B., Di Prodi P. & Woergoetter F. (2008) OBSERVING STDP OF PYRAMIDAL CELL AND ATTACHED INTERNEURON MICROCIRCUIT USING DETAILED CA2+ DYNAMICS.
11. Thompson, M. A., Porr, B, Kolodziejski, C., Wörgötter, F.: Second Order Conditioning in the Sub-cortical Nuclei of the Limbic System. SAB 2008: 189-198
12. Florentin Wörgötter, Bernd Porr: Reinforcement learning. Scholarpedia 3(3): 1448 (2008)
13. Kolodziejski, C, Porr, B, and Wörgötter, F (2008). On the asymptotic equivalence between differential Hebbian and temporal difference learning. Neural Computation in press.
14. Kolodziejski, C, Porr, B, and Wörgötter, F (2008). On the equivalence between differential Hebbian and temporal difference learning In: . Proceedings of the Computational and Systems Neuroscience meeting COSYNE*2008, Salt Lake City.
15. Kolodziejski, C, Porr, B, and Wörgötter, F (2008). Mathematical properties of neuronal TD-rules and differential Hebbian learning: a comparison. Biological Cybernetics 98(3):259-272.
16. Kolodziejski, C, Porr, B, Tamosiunaite, M, and Wörgötter, F (2008). On the equivalence between TD-learning and differential Hebbian learning using a local third factor. In: Advances in Neural Information Processing Systems 21. MIT Press, pages in press.
17. Tamosiunaite, M., Porr, B., and Wörgötter, F. (2007) Developing velocity sensitivity in a model neuron by local synaptic plasticity. Biological Cybernetics. in press.
18. Manoonpong, P., Porr, B. and Woergoetter, F. (2007) The RunBot Architecture for Adaptive, Fast, Dynamic Walking. Proceedings of the ISCAS conference, New Orleance.
19. Soell, S. and Porr, B. (2007) An Undersampling Digital Microphone. Proceedings of the ISCAS conference, New Orleance.
20. McCabe, L., Di Prodi, P., Porr, B. and Woergoetter, F. (2007) Shaping of STDP curve by interneuron and Ca2+ dynamics. Proceedings of the sixteenth annual computational neuroscience meeting CNS*2007, Toronto.
21. Thompson, A., Porr, B., Egerton, A. and Woergoetter, F (2007) How bursting and tonic dopaminergic activity generates LTP and LTD. Proceedings of the sixteenth annual computational neuroscience meeting CNS*2007, Toronto.
22. Kolodziejski, C., Porr, B. and Woergoetter, F. (2007) Anticipative adaptive muscle control:Forward modeling with self-induced disturbances and recruitment. Proceedings of the sixteenth annual computational neuroscience meeting CNS*2007, Toronto.
23. C. Kolodziejski, B. Porr and F. Wörgötter (2007) ANTICIPATIVE ADAPTIVE CONTROL OF MUSCLES USING RECRUITMENT. Proceedings of the 7th Göttingen Meeting of the German Neuroscience Society.
24. MA. Thompson, B. Porr, F. Woergoertter and L. McCabe (2007) MODELLING THE SUBCORTICAL NUCLEI OF THE LIMBIC SYSTEM TO PERFORM REVERSAL LEARNING. Proceedings of the 7th Göttingen Meeting of the German Neuroscience Society.
25. Tamosiunaite, M., Porr, B., and Wörgötter, F. (2007) Self-influencing synaptic plasticity: Recurrent changes of synaptic weights can lead to specific functional properties. Journal of Computational Neuroscience. doi:10.1007/s10827-007-0021-2
26. Porr, B., and Wörgötter, F. (2007) Learning with ``Relevance'': Using a third factor to stabilise Hebbian learning. Neural Comp, in press.
27. Porr, B., Kulvicius, T. and Wörgötter, F. (2007) Improved stability and convergence with three factor learning. Neurocomputing, in press. doi:10.1016/j.neucom.2006.10.13.
28. Kolodziejski, C., Porr, B., Wörgötter, F. (2006) Fast, flexible and adaptive motor control achieved by pairing neuronal learning with recruitment. Proceedings of the fifteenth annual computational neuroscience meeting CNS*2006, Edinburgh.
29. Geng, T., Kulvicius, T., Porr, B. and Wörgötter, F. (2006) Neural Control and Synaptic Plasticity in a Planar Biped Walking Robot. Proceedings of the fifteenth annual computational neuroscience meeting CNS*2006, Edinburgh.
30. Thompson, A., Porr, B., and Wörgötter, F. (2006) Stabilising Hebbian learning with a third factor in a food retrieval task. LNCS/LNAI 4095, p 313-322, Springer, Heidelberg, Editor: S. Nolfi.
31. Porr B. & Wörgötter F. (2006) How to stabilise Hebbian learning with a third factor? Proceeding of the 5th forum of European neuroscience, Vienna.
32. Soell, S. and Porr, B. (2006) A VCO Based Digital Microphone Utilizing an FIR Sigma Delta Converter. Proceedings of MIXDES 2006 Conference, IEEE. Ed.: Napieralski, A. Gdynia, Poland.
33. Porr, B., and Wörgötter, F. (2006) Fast heterosynaptic learning in a robot food retrieval task inspired by the limbic system. Biosystems, in press.
34. Bernd Porr, Alice Egerton and Florentin Wörgötter (2006) Towards Closed Loop Information: Predictive Information. Constructivist Foundations 1(2), p 83-90.
35. T. Geng, B. Porr, and F. Wörgötter (2006), Fast Biped Walking with A Sensor-driven Neuronal Controller and Real-time Online Learning. International Journal of Robotics Research, 25(3), p 243-259, March 2006, Sage press.
36. Porr, B., and Wörgötter, F. (2006) Strongly improved stability and faster convergence of temporal sequence learning by utilising input correlations only. Neural Comp, 18:1380-1412.
37. Minija Tamosiunaite, Bernd Porr, Florentin Woergoetter (2006) Temporally changing synaptic plasticity. Advances in Neural Information Processing Systems 18. MIT Press, Cambridge, MA
38. Tao Geng, Bernd Porr, Florentin Woergoetter (2006) Fast biped walking with a reflexive controller and real-time policy searching. Advances in Neural Information Processing Systems 18. MIT Press, Cambridge, MA
39. T. Geng, B. Porr, F. Wörgötter. Fast biped walking with a reflexive neuronal controller and policy gradient reinforcement learning. Proceedings of 3rd International Symposium on Adaptive Motion in Animals and Machines, 25th Sep, 2005, Illmenau, Germany.
40. Geng, T., Porr, B. and Wörgötter, F. (2005), Coupling of neural computation with physical computation for stable dynamic biped walking control, Neural Comp.
41. Wörgötter, F. and Porr, B. (2005) Temporal sequence learning, prediction and control - A review of different models and their relation to biological mechanisms. Neural Comp. 17(2), 245-319.
42. Porr. B. and Wörgötter, F. (2005) Inside Embodiment --- What means Embodiment for Radical Constructivists? Kybernetes, 105--117.
43. Porr, B. and Wörgötter, F. (2005) Non-hebbian synaptic plasticity allows for the stable implementation of one-shot predicitive learning. Proceedings of the 6th Meeting of the German Neuroscience Society, 30th Göttingen Neurobiology Conference 2005 eds: Prof. H. Zimmermann and Prof. K. Krieglstein
44. Tamosiunaite, M. and Porr, B. and Wörgötter, F. (2005) How learning influences itself: The recurrent dependence of membrane potential shapes and synaptic plasticity. Proceedings of the 6th Meeting of the German Neuroscience Society, 30th Göttingen Neurobiology Conference 2005 eds: Prof. H. Zimmermann and Prof. K. Krieglstein
45. Saudargiene, A., Porr, B. and Wörgötter, F. (2004) Local learning rules: Predicted influence of dendritic location on synaptic modification in spike timing dependent plasticity. Biol. Cybern. 92(2), 128-138.
46. Porr, B., Saudargiene, A. and Wörgötter, F. (2004) Analytical solution of spike-timing dependent plasticity based on synaptic biophysics, In: Sebastian Thrun and Lawrence Saul and Bernhard Schölkopf (eds.) Advances in Neural Information Processing Systems 16. MIT Press, Cambridge, MA
47. Saudargiene, A., Porr, B. and Wörgötter, F. (2004) Synaptic modifications depend on synapse location and activity: a biophysical model of STDP. Biosystems, 79, 3-10.
48. Saudargiene, A., Porr, B. and Wörgötter, F. (2004) Biological inspired artificial neural network algorithm which implements local learning rules. Proceedings ISCAS 2004.
49. Saudargiene, A., Porr, B. and Wörgötter, F. (2003) How the shape of pre- and postsynaptic signals can influence STDP: A biophysical model. Neural Comp. 16, 595-626.
50. Porr, B.: Sequence-Learning in a Self-Referential Closed-Loop Behavioural System. PhD Thesis.
51. Porr, B. and Wörgötter, F. (2003) Isotropic sequence order learning in a closed loop behavioural system. Roy. Soc. Phil. Trans. Mathematical, Physical & Engineering Sciences, 361(1811) 2225-2244.
52. Porr, B. and Wörgötter, F. (2003) Isotropic sequence order learning. Neural Comp., 15, 831-864.
53. Porr, B., v.Ferber, C. and Wörgötter, F. (2003) ISO-learning approximates a solution to the inverse controller problem in an unsupervised behavioural paradigm. Neural Comp. 15, 865-884.
54. Porr, B. and Wörgötter, F.: Interaction, self-reference and contingency in computational neuroscience: analytical descriptions and information theoretic consequences. In: Rethinking Communicative Interaction: New interdisciplinary horizons, (Colin B. Grant, Ed.), John Benjamins Publ. Co., Amsterdam, Philadelphia, pp. 145-162.
55. Porr, B. and Wörgötter, F. (2003) Learning a forward model of a reflex. In S. Becker, S. Thrun, and K. Obermayer, editors, Advances in Neural Information Processing Systems 15. MIT Press.
56. Porr, B. and Wörgötter, F.: Isotropic Sequence Order Learning in a Closed Loop Behavioural System. Proceedings of the EPSRC/BBSRC International Workshop - Biologically-Inspired Robotics: The Legacy of W. Grey Walter 2002 Bristol, Hewlett Packard technical report.
57. Porr, B. and Wörgötter, F.: Isotropic Sequence Order Learning using a Novel Linear Algorithm in a Closed Loop Behavioural System (2002). Biosystems, 67(1-3), pp 195-202.
58. Porr, B. and Wörgötter, F.: Predictive learning in rate-coded neural networks: A theoretical approach towards classical conditioning. Neurocomputing (2002). Vol. 44-46, pp 585-590.
59. Porr, B. and Wörgötter, F. (2002) Stereoscopic depth analysis in video real-time by means of causal electronic filters. Int. J. Comp. Vis. (IJCV) 49(1), 39-55.
60. Porr, B. (1999) Systemtheorie und Naturwissenschaft. Eine interdisziplinäre Analyse von Niklas Luhmanns Werk. Deutscher Universitäts-Verlag. ISBN: 3-8244-4478-X (Book).
61. Bernd Porr, Bernd Nürenberg, Florentin Wörgötter: A VLSI-Compatible Computer Vision Algorithm for Stereoscopic Depth Analysis in Real-Time (2002) International Journal of Computer Vision. Volume: 49(1): 39 - 55.
62. EU Patent: Predictive Filter: Controller and Method of Controlling an Apparatus. Filed 05.6.2001, in the name of University of Stirling, B. Porr and F. Wörgötter (Inventors). Sold sept 2004.
63. Porr, B. and Wörgötter, F.: Temporal Hebbian learning in Rate-Coded Neural Networks: A theoretical approach towards classical conditioning (2001) Proceedings of the ICANN 2001 in Vienna.
64. How to "hear" visual disparities: real-time stereoscopic spatial depth analysis using temporal resonance. Biol Cybern. 1998 May;78(5):329-36.
65. Patent: Deutsches Patent Nr. 196 25 727: Verfahren zur dreidimensionalen Echtzeit-Stereobildanalyse. (angemeldet am 27.6. 1996, Offenlegung 2.1. 1998, erteilt am 3.5.2000, Porr, B. und Wörgötter, F., Erfinder)

• Interests:
  • Closed loop temporal sequence learning / control.
    Autonomous agents control their inputs and not their outputs.
    This becomes clear with the chicken-egg problem #2: The chicken wants to keep the egg. The farmer, however, wants to have the egg. While the chicken perceives itself as a closed loop system the farmer perceives the chicken as an open loop system: input (food), put-put and output (egg).
  • How can a reactive system turn itself into a proactive system?
  • Limbic system
  • Spike timing dependent plasticity
  • Constructivist models of temporal sequence learning.
  • Robotics
  • Applications of control/signal theory in the field of CN
  • Embodiment
  • Deep brain stimulation
  • Wireless transmission of bio signals
  • Image processing
• It's revealed: robots are more human than you dare to think :-)

I'm teaching or have taught:

• Digital Signal Processing (Handout)
• Audio and visual perception
• Image processing
• Team Film project (Lighting for video)
• Data acquisition in music processing (Handout)
• Acoustics and Audio Technology (Radiation from a loudspeaker, The acoustic wave equation)
• Robot team design project
• Final year and MSc projects I have supervised:
  Wireless ECG/EEG, audio exciter, optimising RunBot, muscle surface stimulator, autonomous robot with the MSP430, measuring performance data from a trumpet, investigating foot pressure and MEG while walking, ...
• Lighting for Theatre (way back in Germany)

• My Friend Helen (2008)
• Nora's Highland Mission (2009)
• Waiting for better times (2009)
• Big Boots (2009)
• ...and a growing number of documentaries about Electronics and Electrical Engineering

I've been interested in communication and sociology since I started as an undergraduate at the university. In particular I'm interested in Niklas Luhmann's theory of social systems. His theory is my underlying paradigm. I admire Niklas Luhmann and I can only encourage you to read his work. He's great!

• Preamplifier for the long shotgun mic ME-88
• USB DUX: data acquisition under Linux. No reverse engineering. Just plain forward engineering towards Linux! The commercial project.
• Video: development of special devices for our stereo-vision-project
  • A simple example: the STEREO-SWITCH which then evolved to this project:
  • Synchronize 2 cameras to capture stereo without interlace effects. We grab 3D-information with a standard BT848-grabber (odd field left, even field right): Circuit diagram :-) and the timing diagram.
  • ...and finally one of my early projects for medical data aquisition (funded by my GP Dr König in 1990 :-).

Well, it's just a random collection of some useful stuff I've done or maintaining. Nothing about compiler architectures or about any crusade about a new programming language. ;-)

• MPEG4 streaming with Sony Vegas
• "Hard" subtitles for your film
• IBM laptop X22 under Linux
• 8051 Assembler
• The Linux kernel driver for USB DUX. Now part of the mainstream kernel as part of the project! From 2.6.31.

• I've designed the web page of the ECG lab which is now a reference page for e-teaching in medicine (German page). This is a screen shot.
• ECG/EEG preamp
• Heart/ECG lab in Germany
• Estimate the angle of the heart's electrical activity (JAVA-program)
• Browse the measurements of the ECG lab (JAVA-program)
• Animation of the Vector-ECG (JAVA)

• My teaching portfolio
• Hochschulrahmengesetz: die 6+6-Klausel (oder die "Zwölfender"). German page about the law which bans every postdoc from science in case he/she hasn't managed to become professor after 6 years. It's not a joke. It's real since 2001!.
• How to register your (German) car in GB