Ruedi Stoop

Email:
Work phone:
+41 44/ 635 30 63
Home page:

Nonlinear Biocomputation:

Overall questions

The brain does computation different to computers. It works with cycle times far below the cycle times used in nowadays computers, and it is based on a highly and recurrently connected architecture, a building principle that is typically avoided in the design of artificial chips.

Issues that differentiate between cortical and artificial computation are:

  • Noisiness of cortex
  • Different synchronization strategy of cortex (lack of CMOS clock synchronization)

Methods

We use methods from nonlinear dynamics and statistical mechanics, where we define exact models and, if available, compare with experimental data.

Research topics

We work on seven specific research issues:

  1. Principles and information content of cochlea hearing (with A. Kern). A. Kern succeeded in making a novel, biomorphical and biologically detailed model of the cochlea, based on Hopf bifurcators, that outperforms other models by far. Moreover, we also managed to establishing close connections with other auditory groups (Prof. D. Robert, Univ. of Bristol), where we were welcomed to introducing our views of the role of nonlinear dynamics into the field. Collaboration: Dr. S. Launer, Phonak AG, Prof. D. Robert, Univ. of Bristol.
  2. The role of noise in biological computation, with emphasis on computation by generalized locking (with A. Kern). Recent data from insect hearing from the group of Prof. Robert emphasize the role of noise in biological computation. To understand the data, we already started to head into the field of stochastic resonance theory. Another occurrence of stochastic resonance was recently observed in a project with a semester student, J. Buchli, where we successfully studied holographs and head towards studying holographic neural networks. Collaboration: Prof L.A. Bunimovich, Georgia Inst. of Tech., Prof. A. Pavlov, Vavilov Institute, St. Petersburg.
  3. Cortical chaos and control mechanisms (with A. Kern). On the topic of cortical chaos and control mechanisms, where we investigated interesting experimental data from Prof. Martin and compared with biologically detailed neuron simulations previously made by D. Blank. We got evidence for a possible realization of our concept of computation by locking from these data, and made a corresponding publication in J. Cog. Brain Res.(2002). Here, we succeeded in an improved understanding of interspike interval distributions by means of Log-Log plot analysis, proved the chaos property of experimental data and published papers on how this chaotic behavior could be controlled/ stabilized (J. Stat. Phys.(2002) and Phys. Rev. E (2001)). Collaboration: Dr. C. Wagner, Univ. of Bern
  4. Entropy measures of complexity, application to coupled systems (with M. Christen). We developed a measure of information complexity, by which we will be able to asses the performance loss in damaged hearing. This measure is able to characterize the overall performance of a dynamical process in an integral way, while up to now measures of information only concentrated on particular observable measures. The concept already has attracted great interest by renowned scientists. Also here, publications can be expected for 2002. The developed concept will be applied in future to measure complexity and complexity loss by damage of neuron response to hearing. Furthermore, we established a research collaboration with Prof. D. Hell, Klinik Burghölzli, where the same measure will be applied in a different context. Collaboration: Prof. L.A. Bunimovich, Georgia Inst. of Tech., Prof. S. Stramaglia, Univ. of Bari
  5. Biological computing: Locking as the mesoscopic response paradigm and means of information encoding and computation (with J.-J.v.d.Vyver). We shifted focus and made progress on the more theoretical side, by understanding -the range of influence of the particular interaction between different types of neurons, and -impact of the connectivity for these questions. Using biologically detailed simulation we were able to show that the theoretical predictions made on the locking principle emerge, even in more general conditions than expected (locking of bursting, v.d.Vyver, unpublished). Collaboration: Prof. W.-H. Steeb, Rand Afrikaans Univ.
  6. Statistical mechanics approach towards clustering (with S. Lecchini). Collaboration: Prof. S. Stramaglia, Univ. of Bari.
  7. Statistical mechanics of neural networks (with Th. Ott). On the basis of a recent KTI contract with Novartis AG, we recently started getting involved with a statistical mechanics approach towards clustering and with statistical mechanics aspects of neural networks in general (with Th. Ott). We managed to make connections to the leading groups in this area.Collaboration: Prof. S. Stramaglia, Univ. of Bari.

Teaching

INI-412 Complex Systems: Berechenbares Chaos in dynamischen Systemen
INI-413 Auditory Informatics
INI-422 Dynamische Systeme in der Biologie
INI-426 Block: Systems Neuroscience
INI-428 Theory, programming and simulation of neural networks
INI-U-01 Nichtlineare Zeitserien-Analyse mit Mathematica
INI-U-02 Informationstheorie Dynamischer Systeme
INI-U-03 Dynamische Systeme für Naturwissenschaftler II

Publications

2011

  • Gomez, F. and Stoop, R. Quantitative Assessment of the Log-Log-Step Method for Pattern Detection in Noise-Prone Environments, PloS One, 6:(12) e28107, 2011
  • Gomez, Florian and Stoop, Ruedi Log-Log-Step Method for Detection of Patterns Within Randomness Quantitatively Assessed, Proceedings of the 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA) 419-422, 2011
  • Kern, A and Martignoli, S and Mathis, W and Steeb, W H and Stoop, R L and Stoop, R Analysis of the “Sonar Hopf” Cochlea, Sensors, 11:(6) 5808-5818, 2011
  • Kern, A and Stoop, R Principles and typical computational limitations of sparse speaker separation based on deterministic speech features, Neural Computation, 23:(9) 2358-2389, 2011
  • Martignoli, S. and Stoop, R. Transduction of Cochlear Oscillations into Spikes in a Mesoscopic Nonlinear Model of the Peripheral Hearing System, Proceedings of the 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA) 354-357, 2011
  • Saase, Victor and Stoop, Ruedi Cortical Microcircuits Have No Distinguished Role in LSM Information Processing, Proceedings of the 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA) 358-361, 2011
  • Schule, Martin and Stoop, Ruedi The Dynamic Behaviour of a Simple Symbolic Dynamics Model of Locally Coupled Oscillators, Proceedings of the 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA) 484-487, 2011
  • Stoop, Ralph and Ott, Thomas and Di pietro, Gianni and Stoop, Ruedi Biased Clustering Due to Intrinsic Nonlinear Dynamics Structures, Proceedings of the 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA) 415-418, 2011
  • Stoop, R and Joller, J Mesocopic comparison of complex networks based on periodic orbits, Chaos, 21:(1) 016112, 2011
  • Stoop, Ruedi Shrimps predict failure of main bioinformatics algorithms, INDS/ISTET 2011, 2011
  • Stoop, Ruedi and Nuesch, Patrick and Stoop, Ralph Is the Origin of Intelligence Rooted in a Higher Language Class? A Nonlinear Dynamics approach, Dynamic Days 2011. Conference proceedings, 2011

2010

  • Landis, F and Ott, T and Stoop, R Hebbian self-organizing integrate-and-fire networks for data clustering, Neural Computation, 22:(1) 273-288, 2010
  • Martignoli, S and Stoop, R Local cochlear correlations of perceived pitch, Physical Review Letters, 105:(4) 048101-4pp, 2010
  • Stoop, R and Benner, P and Uwate, Y Real-world existence and origins of the spiral organization of shrimp-shaped domains, Physical Review Letters, 105:(7) e074102, 2010
  • Uwate, Y and Nishio, Y and Stoop, R Complex pattern in a ring of van der Pol oscillators coupled by time-varying resistors, Journal of Circuits, Systems, and Computers, 19:(4) 819-834, 2010

2009

  • Landis, F. and Ott, T. and Stoop, R. Hebbian Self-organizing Integrate-and-Fire Networks for Data Clustering, Neural Computation, 2009
  • Martignoli, S. and Stoop, R. Cochlear Hopf-Nonlinearities and Pitch Perception, Proceedings of the 17th International Workshop on Nonlinear Dynamics of Electronic Systems NDES 2009, Rapperswil., 2009
  • Nuesch, P. and Jasa, T. and Joller, J. and Stoop, R. ANIMAL COURTSHIP FROM A LANGUAGE POINT OF VIEW , Proc. of NDES 2009, 2009
  • Schüle, Martin and Ott, Thomas and Stoop, Ruedi Computing with Probabilistic Cellular Automata, ICANN 2009, Part II, LNCS 5769:, 2009
  • Stoop, R. and Jasa, T. The Origin of Intelligence: A Higher Language Class? , Conf. Proc. Nolta 2009, 2009
  • Uwate, Y and Nishio, Y and Stoop, R Noise-Induced Breakdown of Stochastic Resonant Behavior of van der Pol Oscillators Coupled by Time-Varying Resistor, IEEE International Symposium on Circuits and Systems (ISCAS'09) 1887-1890, 2009
  • Uwate, Y and Nishio, Y and Stoop, R Switching Phase States in Two van der Pol Oscillators Coupled by Stochastically Time-Varying Resistor, International Workshop on Nonlinear Dynamics of Electronic Systems (NDES'09), 2009
  • Stoop, R. and Arthur, B. An Expressive Body Language Underlies Drosophila Courtship Behavior, Complex Dynamics in Physiological Systems: From Heart to Brain 215-227 , 2009
  • Stoop, R. and Christen, M. , Detection of patterns within randomness, 2009

2008

  • Kern, A. and Heid, C. and Steeb, W.-H. and Stoop, N. and Stoop, R. Biophysical Parameters Modification Could Overcome Essential Hearing Gaps, PLoS Computational Biology, 4(8): : doi:10.1371/journal.pcbi.1000161, 2008
  • Martignoli, S. and Stoop, R. Phase-locking and Arnold coding in prototypical network topologies, Discrete and Continuous Dynamical Systems B, 9:(1) 145-162, 2008
  • Martignoli, S. and Stoop, R. Synchronization of Model Neurons to AM Auditory Stimuli, Proceedings of the International Symposium on Nonlinear Theory and its Applications NOLTA 2008, in press:, 2008
  • Schuele, Martin and Ott, Thomas and Stoop, Ruedi Global Dynamics of Finite Cellular Automata, Springer LNCS proceedings of ICANN 2008 71-78, 2008
  • Stoop, R. and Arthur, B. "Periodic orbit analysis demonstrates genetic constraints, variability, and switching in Drosophila courtship behavior" , Chaos, 18: 023123, 2008

2007

  • Martignoli, S. and Uwate, Y. and Stoop, R. The course of the SNR along the cochlear cascade of electronic Hopf amplifiers, Proc. of 15th International Workshop on Nonlinear Dynamics of Electronic Systems NDES 2007, Tokushima, Japan , 2007
  • Martignoli, S. and v. d. Vyver, J.-J. and Kern, A. and Uwate, Y. and Stoop, R. Analog electronic cochlea with mammalian hearing characterics, Applied Physics Letters, 91:(064108), 2007
  • Ott, T. and Schuele, M. and Stoop, R. Message Passing in Neural Networks, Proceedings of NDES 2007, 2007
  • Stoop, R and Jasa, T and Uwate, Y and Martignoli, S From Hearing to Listening: Design and Properties of an Actively Tunable Electronic Hearing Sensor, Sensors( 7) 3287-3298, 2007
  • Stoop, R. and Jasa, T. and Uwate, Y. and Martignoli, S. From Hearing to Listening: Design and Properties of an Actively Tunable Electronic Hearing Sensor, Sensors, 7: 3287-3298, 2007
  • Stoop, R. and Wagner, C. Neocortex's architecture optimizes computation, information transfer and synchronizability at given total connection length , International Journal of Bifurcation and Chaos, 17:(7), 2007
  • Uwate, Y and Martignoli, S and Nishio, Y and Stoop, R Emergence of Intricate Dynamical Response by Supercritical Parametrically Driven or Ringwise Coupled Subcritical Hopf Oscillators, Proceedings of IEEE International Workshop on Nonlinear Dynamics of Electronic Systems (NDES'07), 2007
  • Uwate, Y and Nishio, Y and Stoop, R Scale-Rule Selection of Affordable Neural Network for Chaotic Time Series Learning, Proceedings of European Conference on Circuit Theory and Design (ECCTD'07) pp. 811-814, 2007
  • Wagner, C. and Stoop, R. Neocortex's small world of fractal coupling, International Journal of Bifurcation and Chaos, 2007
  • Christen, M and Bongard, G and Pausitz, A and Stoop, N and Stoop, R , Managing autonomy and control in social systems, 2007

2006

  • Christen, M and Bongard, G and Pausitz, A and Stoop, N and Stoop, R From Small World to Hierarchic Business Information Networks by Reorganizations - A Real World Study of a Failure, Proceedings of the Workshop "Potentials of Complexity Science for Business, Governments, and the Media 2006" 202-211, 2006
  • Christen, M and Kohn, A and Ott, T and Stoop, R Measuring spike pattern reliability with the Lempel-Ziv-distance, Journal of Neuroscience Methods, 156:(1-2) 342-350, 2006
  • Christen, M and Nicol, A and Kendrick, K and Ott, T and Stoop, R Odour encoding in olfactory neuronal networks beyond synchronisation, Neuroreport, 17:(14) 1499-1502, 2006
  • Heid, C. and Kern, A. and Stoop, R. Cochlear Tonotopic Remapping by Variation of Biophysical Parameters, Proceedings of the 14th workshop on Nonlinear Dynamics of Electronics Systems, NDES 2006, Dijon (France), (accepted): 41-44, 2006
  • Kern, A. and Ott, T. and Stoop, R. Source separation by atomic signal decompositions, Proc. of the 14th Workshop on the Nonlinear Dynamics of Electronic Systems (NDES) 77-80, 2006
  • Kern, A. and Ott, T. and Stoop, R. Acoustic source separation by atomic signal decomposition, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500103, 2006
  • Martignoli, St. and Kern, A. and Stoop, R. Response of the Hopf cochlea to complex input sounds, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500102, 2006
  • Ott, T. and Christen, M. and Stoop, R. An unbiased clustering algorithm based on self-organisation processes in spiking networks, NDES 2006, Dijon, France, Proceedings of NDES: 143-146, 2006
  • Ott, T. and Kern, A. and Stoop, R. Faster spike sorting with belief propagation, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500105, 2006
  • Ott, T. and Stoop, R. The Neurodynamics of Belief Propagation on Binary Markov Random Fields, Advances in Neural Information Processing Systems NIPS '06, 2006
  • Ott, T. and Stoop, R. Benefits and pitfalls of belief propagation-mediated superparamagnetic clustering, Physical Review E, 74:(4) 042103, 2006
  • Stoop, N. and Ott, T. and Stoop, R. Loopy belief propagation: Benefits and pitfalls on Ising-like systems, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500104, 2006
  • Stoop, R. and Heid, Ch. and Arthur, B.I. The nontrivial grammar of Drosophila courtship language distinguishes among different genetic profiles, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500107, 2006
  • Stoop, R. and Kern, A. and Göpfert, M.C. and Smirnov, D.A. and Dikanev, T. and Bezrucko, B.P. A generalization of the van-der-Pol oscillator underlies active signal amplification in Drosophila hearing , European Biophysics Journal, 35:(6) 511-516, 2006
  • Stoop, R. and Kern, A. and Steeb, W.-H. and Stoop, N Comment on the Shiner-Davison-Landsberg Measure, Nonlinear Dynamics, 44:(1-4) 213-218, 2006
  • Stoop, R. and Martignoli, St. and Wagner, C. Optimization at work in the cortex: Limit cycle computation, minimization of the Total wiring length, and architectural computational classes, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500106, 2006
  • Stoop, R. and Ott, Th. Towards a quantitative theory of biocomputation, Proc. Int. IEEE Symposium on Nonlinear Theory and its Applications NOLTA 2006 500101, 2006
  • Uwate, Y. and Ott, T. and Stoop, R. and Nishio, Y, Performance of Feedforward Neural Network with External Influence Function for Back Propagation Learning, RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'06), 2006
  • Stoop, R. and Steeb, W.-H. Berechenbares Chaos, 2006

2005

  • Christen, M. and Ott, T. and Kern, A. and Stoop, N. and Stoop, R. Periodic economic cycles: the effect of evolution and control, Journal of Statistical Mechanics: Theory and Experiment, doi:10.1088/1742-5468/2005/11: P11013, 2005
  • Christen, M. and Ott, Th. and Kern, A. and Stoop, N. and Stoop, R. Periodic economic cycles: The effect of evolution towards criticality, and control, IEEE Conf. on Nonlinear Theory and its Applications NOLTA 2005 553-556, 2005
  • Hardy, Y. and Steeb, W.-H. and Stoop, R. Genetic Algorithms, Floating Point Numbers and Applications, International Journal of Modern Physics C, 2005
  • Kern, A. and Nagy, O. and Stoop, R. Sparse time-frequency analysis of speech signals, IEEE Conf. on Nonlinear Theory and its Applications NOLTA 2005 545-548, 2005
  • Kern, A. and Stoop, R. and Göpfert, M.C. and Smirnov, D.A. and Bezrucko, B.P. Signal processing in insect hearing organs, Proc. European IEEE Conference on Circuit Theory and Design ECCTD 2005 paper no. 320, 2005
  • Ott, T. and Dauwels, J. and Stoop, R. Sequential Clustering by Loopy Belief Propagation, Proceedings of ECCTD '05, Cork. Paper No 328, 2005
  • Ott, T. and Frey, M. and Stoop, R. Criticality and Computation in Random Threshold Networks with Noise (Criticality in Random Boolean Networks), NOLTA 2005, Bruges, Belgium 549-552, 2005
  • Ott, T. and Kern, A. and Steeb, W.-H. and Stoop, R. Sequential Clustering: Tracking Down the Most Natural Clusters, Journal of Statistical Mechanics: theory and experiment doi:10.1088/1742-5468/2005/11/P 11014, 2005
  • Steeb, W.-H. and Stoop, R. Bell-CHSH inequality and Genetic Algorithms, International Journal of Modern Physics C(In press), 2005
  • Stoop, R. and Kern, A. and Göpfert, M.C. and Smirnov, D.A. and Dikanev, T.A. and Bezrucko, B.P. A Hopf-type generalized van-der-Pol oscillator underlies active signal generation in Drosophila hearing, Proc. IEEE Conference on Nonlinear Theory and its Applications NOLTA 2005 529-532, 2005
  • Stoop, R. and Kern, A. and van der Vyver, J.-J. How ears go electronic, Proc. IEEE Conference on Nonlinear Theory and its Applications NOLTA 2005, 2005
  • Stoop, R. and Martignoli, S. Information coding, processing and transport by means of phase-coupled neurons, Proc. IEEE Conf. on Nonlinear Theory and its Applications NOLTA 2005 541-544, 2005
  • Stoop, R. and Steeb, W.-H. and Gallas, J.C. and Kern, A. Auditory two-tone suppression from a subcritical Hopf cochlea, Physica A, 351: 175-183, 2005
  • Stoop, R. and Stoop, N. and Kern, A. and Steeb, W.-H. Shiner-Davison-Landsberg complexity revisited, Journal of Statistical Mechanics: theory and experiment P11009 doi:10.1088/1742-5468/2005/11/P11009, 2005

2004

  • Arthur, B. and Stoop, R. Drosophila.m where normal males tend to be female, and the supermachos are fruitless, Proceedings of the NOLTA 2004, Fukuoka, 2004
  • Christen, M. and Kern, A. and Nikitchenko, A. and Steeb, W.-H. and Stoop, R. Fast Spike Pattern Detection Using the Correlation Integral , Physical Review E, 70: 011901-1-7, 2004
  • Christen, M. and Kern, A. and van der Vyver, J.-J. and Stoop, R. Pattern detection in noisy signals, Proceedings of ISCAS 2004, 4: 669-672, 2004
  • Christen, M. and Ott, T. and Stoop, R. Spike train clustering using a Lempel-Ziv distance measure, Proceedings of the 2004 NOLTA conference, Fukuoka 379-382, 2004
  • Hardy, Y. and Steeb, W.-H. and Stoop, R. Entanglement, Disentanglement and Wigner Functions, Physica Scripta, 69: 166, 2004
  • Kern, A. and Stoop, R. Acoustic nonlinear sensory processing, Proceedings of NOLTA 2004, Fukuoka, 2004
  • Kern, A. and Stoop, R. Nonlinear Dynamics of Cochlear Information Processing, Proceedings of the IEEE conference NDES 2004, Evora, 2004 190-193, 2004
  • Ott, T. and Kern, A. and Schuffenhauer, A. and Popov, M. and Acklin, P. and Jacoby, E. and Stoop, R. Sequential Superparamagnetic Clustering for Unbiased Classification of High-dimensional Chemical Data, Journal of Chemical Information and Computer Sciences, 44:(4) 1358-1364, 2004
  • Ott, T. and Steeb, W.-H. and Stoop, R. The Stochastic Network Approach to Clustering , Proceedings of NOLTA 2004, Fukuoka, 2004
  • Ott, T. and Stoop, R. Human-like Perception Using Sequential Superparamagnetic Clustering, Proceedings of NOLTA 2004, Fukuoka, 2004
  • Stoop, R and Buchli, J and Christen, M Phase and frequency locking of detailed neuron models, Proceedings of NOLTA 2004, Fukuoka 43-46, 2004
  • Stoop, R. and Kern, A. Two-tone suppression and combination tone generation as computations performed by the Hopf cochlea performed by the Hopf cochlea, Physical Review Letters, 93:(26) 268103 1-4, 2004
  • Stoop, R. and Kern, A. Essential auditory contrast-sharpening is pre-neuronal, Proceedings of the National Academy of Sciences of the United States of America, 101:(25) 9179-9181, 2004
  • Stoop, R. and Stoop, N. Computation by natural systems defined , Proceedings of ISCAS 2004 (invited session)., 2004
  • Stoop, R. and Stoop, N. Natural computation measured as reduction of complexity, Chaos, 14:(3) 675-679, 2004
  • Stoop, R. and Stoop, N. and Bunimovich, L.A. Complexity of Dynamics as Variability of Predictability, Journal of Stat. Physics, 114:(3) 1127-1137, 2004
  • Stoop, R. and Stoop, N. and Kern, A. and Steeb, W.-H. Complexity measures for nonlinear electronic systems: Comment on the Shiner-Davison-Landsberg measure, Proceedings of the IEEE conference NDES 2004, Evora, 2004
  • Stoop, R and van der Vyver, J.-J. and Christen, M. and Kern, A. Where noise and precision join forces: Coding of neural information via limit cycles, Proceedings of NOLTA 2004, Fukuoka 375-378, 2004
  • Stoop, R. and van der Vyver, J.-J. and Kern, A. Limit cycles, noise and chaos in hearing, Microscopy Research and Technique, 63:(6) 400-412, 2004
  • van der Vyver, J.-J. and Christen, M. and Stoop, N. and Ott, T. and Steeb, W.-H. and Stoop, R. Towards genuine machine autonomy, Robotics and Autonomous Systems, 64:(3) 151-157, 2004
  • Wagner, C. and Stoop, R. Information Processing in Fractally Coupled Networks, Proceedings of the NOLTA 2004, Fukuok, 2004

2003

  • Christen, M. and Kern, A. and Stoop, R. A Correlation Integral Based Method for Pattern Recognition in Series of Interspike Intervals, Proceedings of the 11th Workshop on the Nonlinear Dynamics of Electronic Systems 49-52, 2003
  • Hardy, Y. and Steeb, W.-H. and Stoop, R. Fully Entangled Quantum States in C^N^2 and Bell measurement , International Journal of Theoretical Physics, 42:(12) 2847-2853, 2003
  • Kern, A. and Stoop, R. Essential Role of Couplings Between Hearing Nonlinearities , Physical Review Letters, 91: 128101-1-128101-4, 2003
  • Steeb, W.-H. and Hardy, Y. and Stoop, R. Discrete Wavelets and Perturbation Theory, Journal of Physics A, 36: 6807-6811, 2003
  • Steeb, W.-H. and Hardy, Y. and Stoop, R. Lax representation and Kronecker Product , Physica Scripta, 67 : 464-465, 2003
  • Stoop, R. Hard Limiter Control under Noisy Conditions, in Proceedings of the international symposium"Topical Problems of Nonlinear Wave Physics", III: 51-52 , 2003
  • Stoop, R. and Blank, D.A. and van der Vyver, J.-J. and Christen, M. and Kern, A. Synchronization, Chaos and Spike Patterns in Neocortical Computation, Journal of Electrical & Electronic Engineering, 3:(1) 693-698, 2003
  • Stoop, R. and Buchli, J. and Keller, G. and Steeb, W.-H. Stochastic Resonance in Pattern Recognition by a Holographic Neuron , Physical Review E, 67: 061918-1-061918-6, 2003
  • Stoop, R. and Christen, M. and v.d.Vyver, J.-J. and Kern, A and Wagner, C. Properties of the Control of Noisy, Stable and Chaotic Dynamics, Proceedings of the 11'th Workshop on the Nonlinear Dynamics of Electronic Systems 259-262, 2003
  • Stoop, R. and Kern, A. and Wagner, C. Controlling noisy, stable and chaotic, economics, Proceedings of Complexity 2003, 2003
  • Stoop, R. and Wagner, C. Scaling Properties of Simple Limiter Control , Physical Review Letters, 90: 154101-1-154101-4, 2003
  • Christen, M. and Stoop, R. Verwaltung als komplex-adaptives System: Anmerkungen aus Sicht der Komplexitätsforschung, Verwaltung im 21. Jahrhundert -- gefragt und befragt 235-254, 2003
  • Steeb, W.-H. and Stoop, R. The Nonlinear Workbook: Chaos, Fractals, Cellular Automata, Neural Networks, Genetic Algorithm, Gene Expression Programming, Wavelets, Fuzzy Logic with C++, Java and SymbolicC++ Programs , 2003

2002

  • Kern, A. and van der Vyver, J.-J. and Stoop, R. Towards A Biomorphic Silicon Hopf Cochlea, NDES IEEE Conference on Nonlinear Dynamics of Electronic Systems, 2002
  • Schuffenhauer, A. and Stoop, R. and van der Vyver, J.-J. and Lecchini, S. and Zimmermann, J. and Jacoby, E. An Ontology for pharmaceutical ligands and its application for In Silico screening and library design, Journal of Chemical Information and Computer Science, 42: 947-955, 2002
  • Steeb, W.-H. and Hardy, Y. and Stoop, R. Discrete wavelets and filtering chaotic signals , International Journal of Modern Physics C, 13: 771-776, 2002
  • Stoop, R. and Blank, D.A. and Kern, A. and van der Vyver, J.-J. and Christen, M. and Lecchini, S. and Wagner, C. Collective Bursting in layer IV - Synchronization by Small Thalamic Inputs and Recurrent Connections, Cognitive Brain Research, 13: 293-304, 2002
  • Wagner, C. and Stoop, R. Enhanced information flow in a chain of fractally coupled chaotic clusters, Lecture Notes in Computer Science 905-909, 2002
  • Wagner, C. and Stoop, R. Renormalization Approach to Optimal Limiter Control of 1d Chaotic Systems, Journal of Stat. Physics, 106: 97-107, 2002
  • Stoop, R. and Lecchini, S. Biological Neural Networks: Modelling and Measurements, MODELLING BIOMEDICAL SIGNALS, 2002

2001

  • Steeb, W.-H. and Hardy, Y. and Stoop, R. Bessel Functions, Recursion and a Nonlinear Field Equation, Zeitschrift für Naturforschung, 56a: 710-711, 2001
  • Steeb, W.-H. and Hardy, Y. and Stoop, R. Energy Eigenvalue Level Motion with Two Parameters, Zeitschrift für Naturforschung, 56a: 565-567, 2001
  • Stoop, R. Noise and Patterns in Biological Neural Networks, Control of Oscillations, Proceedings of the Conference Progress in Nonlinear Science, in Honor of the 100 Birthday of A.A. Andronov, 2001
  • Stoop, R. and Blank, D.A. A Mathematical Approach Towards the Issue of Synchronization in Neocortical Neural Networks, 2001
  • Stoop, R. and Blank, D.A. and van der Vyver, J.-J. and Kern, A. Synchronization-Based Computation, Chaos and Spike Patterns in Neocortical Neural Networks, Circuit Paradigm in the 21st Century, 1: 221-224, 2001
  • Stoop, R. and Stoop, N. An Integral Measure of Complexity, Control of Oscillations, Proceedings of the Conference Progress in Nonlinear Science, in Honor of 100 Birthday of A.A. Andronov, 2001
  • Stoop, R. and van der Vyver, J.-J. and Kern, A. Detection of noisy and pattern responses in complex systems, Proceedings of the 2001 Workshop on Nonlinear Dynamics of Electronic Systems 113-116, 2001
  • Wagner, C. and Stoop, R. Universal Scaling Behavior in Flat-topped Maps, Control of Oscillations, Proceedings of the Conference Progress in Nonlinear Science, in Honor of the 100 Birthday of A.A. Andronov, 2001
  • Wagner, C. and Stoop, R. Optimized Chaos Control with Simple Limiters, Physical Review E, 63: 017201, 2001

2000

  • Blank, D. and Kern, A. and Stoop, R. Robust encoding by collective bursting in biologically plausibel neural networks, Proceedings of IEEE International Symposium on Circuits and Systems, III: 694-697, 2000
  • Blank, D. and Stoop, R. and Kern, A. and Douglas, R.J. Optimal Recurrent Amplification in Biophysically Plausible NeuronModels, Proceedings of ICSC Conference 463-469, 2000
  • Hardy, Y. and Steeb, W.-H. and Stoop, R. Jacobi Elliptic Functions, Nonlinear Evolution Equations andRecursion, International Journal of Modern Physics C, 11: 27-31, 2000
  • Kern, Albert and Blank, Daniel and Stoop, Ruedi Projective Noise Reduction with Dynamic Neighborhood Selection, Proc. IEEE Conference on Circuits and Systems, V: 129-132, 2000
  • Kern, Albert and Steeb, W.-H. and Stoop, Ruedi Projective Noise Cleaning with Dynamic Neighborhood Selection, International Journal of Modern Physics C, 11: 27-31, 125-146, 2000
  • Stoop, R. Efficient Coding and Control in Canonical Neocortical Microcircuits, Proc. NDES'2000 IEEE Conference, in Nonlinear Dynamics of Electronic Systems, 2000
  • Stoop, R. and Bunimovich, L.A. and Steeb, W.-H. Generic Origins of Irregular Spiking in Neocortical Networks, Biological Cybernetics, 83: 481-489, 2000
  • Stoop, R. and Kern, A. and Bunimovich, L. A. Control of oscillations and chaos in canonical neocortical microcircuits, Proc. IEEE Conference on Control of Oscillations and Chaos 439-444, 2000
  • Stoop, R. and Schindler, K. and Bunimovich, L. A. Neocortical networks of pyramidal neurons: from local locking and chaos to macroscopic chaos and synchronization, Nonlinearity, 13:(5) 1515-1529, 2000
  • Stoop, R. and Schindler, K. and Bunimovich, L.A. When pyramidal neurons lock, when they respond chaotically, and when they like to synchronize, Neuroscience Research, 36: 81-91, 2000
  • Stoop, R. and Schindler, K. and Bunimovich, L.A. Noise-driven Neocortical Interaction: A Simple Generation Mechanism For Complex Neuron Spiking, Acta Biotheoretica, 48: 149-171, 2000

1999

  • Bernasconi, C. and Schindler, K. and Stoop, R. and Douglas, R.J. Complex response to periodic inhibition in simple and detailed neuronal models, Neural Computation, 11:(1) 67-74, 1999
  • Kern, A. and Steeb, W.-H. and Stoop, R. Local correlation's potential for noise reduction and symbolic partitions , Zeitschrift für Naturforschung, 54: 404-410, 1999
  • Stoop, R. Complex spiking behavior from noise-driven neuron interaction, Statistical Mechanics of Biocomplexity, XV Sitges Euroconference, 1999
  • Stoop, R. and Bunimovich, L.A. Towards Close-to-Nature Neural Networks, Proceedings of the 6th International Conference on Electronics, Circuits and Systems (ICECS '99), 1999
  • Stoop, R. and Schindler, K. and Bunimovich, L.A. Inhibitory connections enhance pattern recurrence in networks of neocortical pyramidal cells, Physics Letters A, 258: 115-122, 1999
  • Stoop, R. and Schindler, K. and Bunimovich, L.A. Noise-driven neocortical interaction: Complex neuron spiking uncovered by nonlinear dynamics, Annual Journal of Neuroradiology, 1999
  • Stoop, R. and Schindler, K. and Goodman, P. Chaotic firing of cortical neurons upon inhibitory periodic stimulation, Chaos and noise in biology, 1999

1998

  • Steeb, W.-H. and Stoop, R. Chaotic maps, control parameter, and Lyapunov exponent, International Journal of Theoretical Physics, 37: 2717, 1998
  • Stoop, R. and Kleinwaks, L. Long-tailed interspike interval distributions from cortical neurons, IEICE Proceedings NOLTA98 1309, 1998

1997

  • Schindler, K.A. and Bernasconi, C.A. and Stoop, R. and Goodman, P.H. and Douglas, R.J. Chaotic Spike Patterns Evoked by Periodic Inhibition of Rat Cortical Neurons, Zeitschrift für Naturforschung, 52a: 509-512, 1997
  • Schindler, K.A. and Bernasconi, C.A. and Stoop, R. and Goodman, P.H. and Douglas, R.J. and Martin, K.A.C Irregular Spike Patterns Produced by Periodic Inhibition of Regularly Firing Rat Neocortical Neurons, Society for Neuroscience Abstracts, 23: 397.5, 1997
  • Steeb, W.-H. and Stoop, R. Exact complexity of the logistic map, International Journal of Theoretical Physics, 36: 943, 1997
  • Stoop, R. The thermodynamics of parallel iteration, Physics Reports, 290: 111, 1997
  • Stoop, R. Fingerprints of second order phase transitions, Zeitschrift für Naturforschung, 52: 393, 1997
  • Stoop, R. Convex Hull Violation by Superpositions, Physical Review E, 55: 6589, 1997
  • Stoop, R. On convex hull violations, Journal of Stat. Physics, 88: 1393, 1997
  • Stoop, R. and Bunimovich, L.A. On a network of rat cortical rat neurons transmitting periodic messages, IEICE Proceedings NOLTA97 170, 1997
  • Stoop, R. and Radons, G. From the routes to chaos to spatially extended systems, Physics Reports, 290: 3, 1997
  • Stoop, R. and Steeb, W.-H. Smooth Lyapunov Dependence, Physical Review E, 55: 7763, 1997

1996

  • Radons, G. and Stoop, R. Phase transitions in the generalized thermodynamical formalism of superpositions of multifractals, Journal of Stat. Physics, 82: 1063, 1996
  • Steeb, W.-H. and van Wyk, M.A. and Stoop, R. Logistic Equation and Invariants, South African Journal of Science, 1996
  • Stoop, R. On Superimposed Dynamical Multifractals, Nonlinear Physics of Complex Systems - Current Status and Future Trends, 1996, 1996
  • Stoop, R. W.-H. Steeb and F. Solms and T.K. Shi and R. Stoop, Cubic Map, Complexity and Lyapunov Exponent, 1996
  • Stoop, R. Evidence for Parallel Iteration in a p-Ge Semiconductor Experiment, Physics Letters A, 217: 151, 1996
  • Stoop, R. and Steeb, W.-H. Asymmetric Bats Characterize Universality in Parallel Iteration, Europhysics Letters, 35: 177, 1996

1995

  • Steeb, W.-H. and Stoop, R. and Heng, L.C. and Villet, Ch. Coupled chaotic oscillators and control of chaos, South African Journal of Science, 91: 273, 1995
  • Stoop, R. The thermodynamic approach to deterministic diffusion of mixed enhanced/dispersive type, Physical Review E, 52: 2216, 1995
  • Stoop, R. On diffusion-related entropy functions: the enhanced case, Europhysics Letters, 29: 433, 1995
  • Stoop, R. and Steeb, W.-H. Applying a generalized Frobenius-Perron operator scheme to multivariate nonlinear dynamical systems, Zeitschrift für Naturforschung, 50: 1123, 1995
  • Stoop, R. and Steeb, W.-H. and Radons, G. A new characterisation of deterministic diffusion: Diffusion-related entropy functions, Physics Letters A, 202: 195, 1995

1994

  • Steeb, W.-H. and Solms, F. and Stoop, R. Chaotic systems and Maximum Entropy Formalism, Journal of Physics A, 27: L399-L402, 1994
  • Steeb, W.-H. and Stoop, R. Bivariate thermodynamic formalism and anomalous diffusion, Journal of Mathematical Physics, 35: 6604, 1994
  • Stoop, R. Bivariate thermodynamic formalism and anomalous diffusion, Physical Review E, 49: 4913, 1994
  • Stoop, R. Bivariate free energy and anomalous diffusion, Europhysics Letters, 25: 99, 1994
  • Stoop, R. and Steeb, W.-H. Entropic characterisation of diffusion, Zeitschrift für Naturforschung, 49: 1215, 1994
  • Stoop, R. and Zumofen, G. and Parisi, J. Anomalous diffusion as escape from a repeller, Chaos, Solitons and Fractals, 11: 2043, 1994

1993

  • Parisi, J. and Badii, R. and Brun, E. and Reyl, C. and Roessler, O.E. and Kittel, A. and Richter, R. and Stoop, R. Explicit Realization of Chaos Control, Zeitschrift für Naturforschung, 48 a: 627, 1993
  • Parisi, J. and Stoop, R. A Possible Scheme for Classisfying Phase Transitions in the Generalized Entropy Spectrum of a Nonhyperbolic System, 25: 33, 1993
  • Stoop, R. Dependence of phase transitions from small changes, Physical Review E(47) 3927, 1993
  • Stoop, R. On hyperbolic elements hiding phase transitions, Physics Letters A, 273: 369, 1993

1992

  • Stoop, R. The generalized thermodynamic formalism applied to hyperbolic and nonhyperbolic models, Special Issue Zakopane Statistical Physics Meeting: xx, 1992
  • Stoop, R. The generalized thermodynamic formalism applied to hyperbolic and nonhyperbolic models, Modern Physics Letters B(24) 1513, 1992
  • Stoop, R. The generalized thermodynamic formalism applied to hyperbolic and nonhyperbolic models(24) 1513, 1992
  • Stoop, R. Phase transitions in the approximated and asymptotic generalized entropy spectrum of nonhyperbolic dissipative dynamical systems, Physical Review A(46) 7450, 1992
  • Stoop, R. and Parisi, J. On partial generalized free energies and entropies, Physics Letters A(46) 215, 1992
  • Stoop, R. and Parisi, J. Phase transitions of scaling functions derived from experimental time series, Zeitschrift für Naturforschung, a 47: 819, 1992
  • Stoop, R. and Parisi, J. On the influence of the grammar on the entropy spectrum of dissipative dynamical systems, Physica D, 58: 325, 1992
  • Peinke, J. and Parisi, J. and Roessler, O.E. and Stoop, R. Encounter with Chaos - Semiconductor physics in the light of nonlinear dynamics, 1992

1991

  • Peinke, J. and Klein, M. and Kittel, A. and Baier, G. and Parisi, J. and Stoop, R. and Hudson, J.L. and Roessler, O.E. Nowhere Differentiable Boundaries in Differentiable Systems- A Proposed Explanation, Europhysics Letters(14) 615, 1991
  • Peinke, J. and Klein, M. and Kittel, A. and Kahlert, C. and Stoop, R. and Parisi, J. and Roessler, O.E. How two Competing Characteristic Exponents generate Different Classes of Fractal Boundaries, International Journal of Bifurcation and Chaos(1) 599, 1991
  • Stoop, R. Phase transitions in the generalized entropy spectrum of nonhyperbolic dynamical systems,, Zeitschrift für Naturforschung(46 a) 1117, 1991
  • Stoop, R. and Parisi, J. Calculation of Lyapunov Exponents avoiding spurious Elements, Physica D(50) 89, 1991
  • Stoop, R. and Parisi, J. Dynamical Phase Transitions in a parametrically modulated radio-frequency Laser, Physical Review A(43) 1802, 1991
  • Stoop, R. and Parisi, J. On the Convergence of the Thermodynamic Averages in Dissipative Dynamical Systems, Physics Letters A(161) 67, 1991
  • Stoop, R. and Parisi, J. and Brauchli, H. Convergence Properties for the Evaluation of Invariants from Finite Symbolic Substrings, Helvetica Physica Acta(64) 951, 1991
  • Stoop, R. and Parisi, J. and Brauchli, H. Convergence Properties for the Evaluation of Invariants from Finite Symbolic Substrings, Helvetica Physica Acta(64) 951, 1991
  • Stoop, R. and Parisi, J. and Brauchli, H. On the characterization of the scaling behavior of dissipative dynamical systems through a generalized entropy, Zeitschrift für Naturforschung(46 a) 642, 1991
  • Stoop, R. and Peinke, J. and Parisi, J. Phase Transitions in a Semiconductor Experiment, Physica D(50) 405, 1991

1989

  • Holzer, R. and Flepp, L. and Stoop, R. and Broggi, G. and Brun, E. Compounded Chaos,, Helvetica Physica Acta(62) 910, 1989
  • Parisi, J. and Peinke, J. and Huebener, R.P. and Stoop, R. and Duong-Van, M Evidence of Chaotic Hierarchy in a p-Ge Semiconductor Experiment,, Zeitschrift für Naturforschung(44 a) 1046, 1989
  • Parisi, J. and Peinke, J. and Huebener, R.P. and Stoop, R. and Duong-Van, M. Evidence of Chaotic Hierarchy in a p-Ge Semiconductor Experiment, Revista Brazileira de Physica(19) 401, 1989
  • Stoop, R. Phase-transitions in Experimental Dynamical Systems, Helvetica Physica Acta(62) 910, 1989
  • Stoop, R. and Peinke, J. and Parisi, J. and Röhricht, B. and Huebener, R.P. Chaos and Hyperchaos in a p-Ge Semiconductor Experiment, Physica D(35) 425, 1989

1988

  • Broggi, G. and Meier, P.F. and Stoop, R. and Badii, R. Nonlinear Dynamics of a Model for Parallel Pumping in Ferromagnets, Physical Review A(35) 365, 1988
  • Stoop, R. and Meier, P.F. Lyapunov Exponents and Scaling Functions from Time Series, Journal of the Optical Society of America(5) 1037, 1988
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