Viktoras Pyragas
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State Scientific Research Institute, Center for Physical Sciences and Technology,
Saulėtekio al.3, LT-10257 Vilnius, Lithuania

Short information

Name: Viktoras
Surname: Pyragas
Date of birth and place: 1975 december 20, Vilnius, Lithuania
Email: viktoras.pyragas##ftmc.lt

I am working in the State Scientific Research Institute, Center for Physical Sciences and Technology,
Semiconductor Physics Institute.

Education:

1996 - 2001 Bachelor studies in the Faculty of Physics of Vilnius University.
2001 - 2003 Master studies in the Faculty of Physics of Vilnius University. Study program: Theoretical physics and astrophysics.
2003 - 2007 PhD studies in the Semiconductors physics institute.

Scientific expierence:

2003 - 2007 PhD studies in the Semiconductors physics institute. Junior research fellow.
2007 - 2008 Junior research fellow in the Semiconductors physics institute.
2010 - 2012 Research fellow in the Institute of Theoretical Physics and Astronomy of Vilnius University.
2008 - 2016 Research fellow in the Semiconductors physics institute.
2016 - Research fellow in the State Scientific Research Institute, Center for Physical Sciences and Technology.

Fields of interest:

I am working (together with prof. Habil. Dr. Kestutis Pyragas) with theoretical models of the real (Quadratic integrate and fire [QIF])
and artificial (Reservoir Computing [RC]) neurons.

I am co-author of 21 ISI publications and 3 review articles.

Publications:

(a) Review articles

  1. K. Pyragas, V. Pyragas, T. Pyragiene, Using time-delay feedback for control and synchronization of dynamical systems,
    Chapter 28 in: Chaos, CNN, Memristors and beyond: A Festschrift for Leon Chua with DVD-ROM, Composed by Eleonora Bilotta,
    Andrew Adamatzky, Guanrong Chen, Eds. 2nd ed., E. Schöll, H.G. Schuster, Eds.
    (World Scientific Publishing Co Pte Ltd: Singapore, 2013), p. 353-366.
  2. K. Pyragas, V. Pyragas, Delayed feedback control techniques, Chapter 5 in: Recent Progress in Controlling Chaos: Series on Stability, Vibration and Control of Systems,
    Ser. B - Vol. 16 , A. Guran, Ed. (World Scientific Publ.: New Jersey 2010), p. 103-146.
  3. K. Pyragas, T. Pyragiene, V. Pyragas, An analytical treatment of the delayed feedback control algorithm, Chapter 3 in: Handbook of Chaos Control, 2nd ed., E. Schöll, H.G. Schuster, Eds.
    (Wiley-VCH Verlag, 2008), p. 47-71.

(b) ISI journal articles

  1. V. Pyragas and K. Pyragas, Effect of Cauchy noise on a network of quadratic integrate-and-fire neurons with non- Cauchy heterogeneities , Physcs Letters A 480C, 128972 (2023).
  2. V. Pyragas and K. Pyragas, Mean-field equations for neural populations with q-Gaussian heterogeneities , Physical Review E 105, 044402 (2022).
  3. V.Pyragas and K. Pyragas, Dynamics of a network of quadratic integrate-and-fire neurons with bimodal heterogeneity , Physics Letters A 416C, 127677 (2021).
  4. V.Pyragas and K. Pyragas, Using reservoir computer to predict and prevent extreme events , Physics Letters A 384 , 126591 (2020).
  5. V.Pyragas and K. Pyragas, State-dependent act-and-wait time-delayed feedback control algorithm , Commun Nonlinear Sci Numer Simulat 73, 338–35 (2019).
  6. V. Pyragas, K. Pyragas, Act-and-wait time-delayed feedback control of autonomous systems , Phys. Lett. A 382, 574-580 (2018).
  7. V. Pyragas and K. Pyragas, Act-and-wait time-delayed feedback control of nonautonomous systems , Phys. Rev. E 94, 012201 (2016).
  8. V. Pyragas and K. Pyragas, Relation between the extended time-delayed feedback contrtol algorithm and the method of harmonic oscillators , Phys. Rev. E 92, 022925 (2015).
  9. V. Pyragas and K. Pyragas, Continuous pole placement method for time-delayed feedback controlled systems , Eur. J. Phys. B 87, 274 (2014).
  10. V. Pyragas and K. Pyragas, Adaptive search for the optimal feedback gain of time-delayed feedback controlled systems in the presence of noise , Eur. J. Phys. B 306, 40331-9 (2013).
  11. V. Pyragas and G. Juzeliūnas, Stability of linear and nonlinear lambda and tripod systems in the presence of amplitude damping , J. Phys. B: At. Mol. Opt. Phys. 45, 165503 (2012).
  12. V. Pyragas, K. Pyragas, Adaptive modification of the delayed feedback control algorithm with a continuously varying time delay , Phys. Lett. A 375, 3866-3871 (2011).
  13. V. Pyragas and K. Pyragas, Modification of delayed feedback control using ergodicity of chaotic systems, Lith. J. Phys. vol. 50, No.3, 305-316 (2010).
  14. K. Pyragas, V. Pyragas, Using ergodicity of chaotic systems for improving the global properties of the delayed feedback control method , Phys. Rev. E 80, 067201-4 (2009).
  15. A. Tamaševicius, G. Mykolaitis, V. Pyragas, K. Pyragas, Delayed feedback control of periodic orbits without torsion in nonautonomous chaotic systems: Theory and experiment, Phys. Rev. E 76, 026203-6 (2007).
  16. V. Pyragas, K. Pyragas, Delayed feedback control of the Lorenz system: An analytical treatment at a subcritical Hopf bifurcation, Phys. Rev. E 73, 036215-10 (2006).
  17. G. Mykolaitis, A. Tamaševicius, S. Bumeliene, A. Namajunas, K. Pyragas, V. Pyragas, Application of ultrafast Schottky diodes to high megahertz chaotic oscillators, Acta Phys. Pol. A 107, No. 2, 365-368 (2005).
  18. A. Tamaševicius, A. Mykolaitis, V. Pyragas, K. Pyragas, Simple chaotic oscillator for educational purposes, Eur. J. Phys. 26, (2), pp. 61-63 (2005).
  19. K. Pyragas, V. Pyragas, and H. Benner, Delayed feedback control of dynamical systems at a subcritical Hopf bifurcation, Phys. Rev. E 70, 056222-4 (2004).
  20. K. Pyragas, V. Pyragas, I.Z. Kiss, and J.L. Hudson, Adaptive control of unknown unstable steady states of dynamical systems, Phys. Rev. E 70, 026215-12 (2004).
  21. K. Pyragas, V. Pyragas, I.Z. Kiss, J.L. Hudson, Stabilizing and tracking unknown steady states of dynamical systems, Phys. Rev. Lett. 89, 244103-4 (2002).

(c) Other refereed journal articles

  1. V. Pyragas, K. Pyragas, Analytical treatment of the delayed feedback controlled Lorenz system close to a subcritical Hopf bifurcation , Lith. J. Phys. vol. 48 No.1, 5-16 (2008).
  2. V. Pyragas, K. Pyragas, An analytical treatment of the delayed feedback control algorithm at a subcritical Hopf bifurcation, Lith. J. Phys., vol. 45, No. 6, 457-461 (2005).
  3. V. Pyragas, K. Pyragas, Adaptive stabilization of unstable steady states of nonlinear dynamical systems, Lith. J. Phys. vol. 44, No. 1, 5-16 (2004).

(d) Conference proceedings

  1. V. Pyragas, K. Pyragas, Using reservoir computer to predict and prevent extreme events,
    International conference of Dynamics Days Digital 2020 : 24-27 August 2020, Amsterdam, Netherlands (2020).
  2. V. Pyragas, K. Pyragas, Continuous Pole Placement for Time Delayed Feedback Controlled Systems,
    Proc. CHAOS-2014. 7-th Chaotic Modeling and Simulation International Conference, Lisbon, Portugal, June 7-10, 2014,
    Christos H. Skiadas, Ed., p. 84, ISBN 978-618-81257-3-5 (2014).
  3. V. Pyragas, K. Pyragas, Adaptive delayed feedback control algorithm with an iterated feedback gain in the presence of noise,
    Proc. NOLTA-2012. Int. Symp. on Nonlinear Theory and its Applications, Palma, Majorca, Spain, October 22-26, 2012,
    C. Merasso and A. Uchida, Eds., p. 64-65, Paper ID 9062 (2012).
  4. V. Pyragas, K. Pyragas, Adaptive delayed feedback control algorithm with a state dependent delay,
    Proc. ENOC-2011. 7th European Nonlinear Dynamics Conf., Rome, Italy, July 24-29, 2011,
    D. Bernardini, G. Rega, and F. Romeo, Eds., p. 131, ISBN 978-88-906234-2-4 (2011).
  5. K. Pyragas, V. Pyragas, T. Pyragiene, Control and synchronization of dynamical systems via a time-delay feedback,
    ISAST T. Comput. Intell. Syst. 1(2), 17-22 (2009).
  6. K. Pyragas, V. Pyragas, T. Pyragiene, Analytical treatment of delayed feedback control method at Hopf bifurcations (invited),
    Proc. ENOC-2005. Fifth EUROMECH Nonlinear Dynamics Conf., Eindhoven, The Netherlands, Aug. 7-12, 2005,
    D.H. van Campen, M.D. Lazurko, W.P.J.M. van den Oever, Eds., p. 1157-1165, ISBN 90-386-2667-3 (2005).