Department VIII
Institute
Homepage
 
Department of Complex Systems and Chemical Information Processing

Group of Unconventional Computing and Chemical Information Processing


ISO-8859-2 (Central European) encoded.
Group Leader : Professor Jerzy Górecki
Tel. + 48 (22) 343-3420
e-mail: gorecki@ichf.edu.pl
Building 3, room 22 [map]

Ph.D. students:

Tel. + 48 (22) 343-3201
Building 7a, 1st floor, room 208 [map]

  • Konrad Giżyński

Tel. + 48 (22) 343-3188
Building 7a, 1st basement, room 7 [map]


Our research :

    We are doing research on non-conventional computing with excitable media.
In an excitable system, information can be coded in a very simple way: a high concentration of activator (an excitation) corresponds to the logical "TRUE" state, a low concentration is linked with the logical "FALSE". A train of excitation pulses forms a chemical signal.
    We are concerned with chemical information processing devices that work using interactions between pulses. Such interaction can be forced by system geometry - i.e. by a spatial distribution of regions characterized by different excitability levels.
    We study the relationships between the chemical dynamics, system geometry and the executed information processing functions. Having in mind that excitable dynamics plays an important role in biology, we hope that our results contribute to better understanding of information processing occurring in living organisms.
    Our group are working in theories, computer simulations, and real chemical experiment in the field of physical chemistry.

    Since 2006, Professor Górecki is a member of the Editorial Board of
    International Journal of Unconventional Computing

Appearance in media :

Collaboration :


Selected Publication (with brief introduction) :

  1. Górecki J., Górecka J. N., Igarashi Y.
    Unidirectional pulse propagation through a gap between two excitable channels,
    J. Phys. Chem. A, (submitted).
  2. We found simpler realization of chemical diode rather than J. Phys. Chem. A, 111, 885 - 889, (2007), and also found an interesting property of the system.


    2009

  3. Kitahata H., Fujio K., Górecki J., Nakata S,
    Igarashi Y., Górecka A., Yoshikawa K.

    Oscillation in Penetration Distance in a Train of Chemical Pulses Propagating in an Optically Constrained Narrowing Channel,
    J. Phys. Chem. A, 113, 10405 - 10409, (2009).
    DOI: 10.1021/jp903686k
  4. Górecki J., Górecka J. N., Igarashi Y.
    Information processing with structured excitable medium,
    Natural Computing
    Volume 8, Number 3, 473 - 492 (2009).
    DOI: 10.1007/s11047-009-9119-y
  5. Górecka J. N., Górecki J., Igarashi Y.
    On the Simplest Chemical Signal Diodes Constructed with an Excitable Medium,
    International Journal of Unconventional Computing
    Volume 5, Number 2, 129 - 143 (2009).
  6. Yoshikawa K., Motoike I. N., Ichino T., Yamaguchi T., Igarashi Y., Górecki J., Górecka J. N.
    Basic Information Processing Operations with Pulses of Excitation in a Reaction-Diffusion System,
    International Journal of Unconventional Computing
    Volume 5, Number 1, 3 - 37 (2009).
  7. Review article of our previous research on information processing with excitatble media.

  8. Yoshikawa K., Nagahara H., Ichino T., Górecki J., Górecka J. N., Igarashi Y.
    On Chemical Methods of Direction and Distance Sensing,
    International Journal of Unconventional Computing
    Volume 5, Number 1, 53 - 65 (2009).
  9. Review article of our previous research on direction and distance sensing with excitatble media.


    2008

  10. Igarashi Y., Górecki J., Górecka J. N.
    One Dimensional Signal Diodes Constructed with Excitable Chemical System,
    Acta Physica Polonica B, 39, 1187 - 1197, (2008).
    -link to the paper-

  11. 2007

  12. Górecki J., Górecka J. N.
    Chemical Wave Based Programming in Reaction-Diffusion Systems
    International Journal of Unconventional Computing
    Volume 3, Number 4, 259 - 270 (2007).
  13. Górecka J. N., Górecki J., Igarashi Y.
    One Dimensional Chemical Signal Diode Constructed with Two Nonexcitable Barriers,
    J. Phys. Chem. A, 111, 885 - 889, (2007).
    DOI: 10.1021/jp0662404
  14. We found simpler realization of chemical diode; on which chemical waves can propagate only single direction on excitable medium.
    We won the second prize of "Best publication competition in the Institute (2008)".


    2006

  15. Górecki J., Górecka J. N.
    Information Processing with Chemical Excitations - from Instant Machines to an Artificial Chemical Brain
    International Journal of Unconventional Computing
    Volume 2, Number 4, 321 - 336 (2006).
  16. Igarashi Y., Górecki J., Górecka J. N.
    Chemical information processing devices constructed using a nonlinear medium with controlled excitability,
    "Unconventional Computation", Lecture Notes in Computer Science,
    5th International Conference UC 2006 Proceedings
    ,
    Springer-Verlag Berlin Heidelberg, 130 - 138, (2006).
    ISBN: 978-3-540-38593-6

    Report about some chemical information processing devices.

  17. Górecka J. N., Górecki J.
    Multiargument logical operations performed with excitable chemical medium,
    J. Chem. Phys., 124, 084101, (2006).
    DOI: 10.1063/1.2170076
  18. Properly designed spatial geometry of excitable media performs multiargument logical operations.

  19. Górecka J. N., Górecki J., Yoshikawa K., Igarashi Y., Nagahara H.
    Distance and direction sensing with excitable chemical medium,
    Progress of Theoretical Physics Supplement, 161, 189 - 194, (2006).
    DOI: 10.1143/PTPS.161.189
  20. Another report about distance and direction detector.


    2005

  21. Górecka J. N., Górecki J.
    On one dimensional chemical diode and frequency generator constructed with an excitable surface reaction,
    Phis. Chem. Chem. Phys., 7, 2915 - 2920, (2005).
    DOI: 10.1039/b504621a
  22. In the model of CO oxidation on Pt(110) surface, setting proper profiles of temperature enables to realize a chemical signal diode and a pulse generator.

  23. Górecki J., Górecka J. N., Yoshikawa K., Igarashi Y., Nagahara H.
    Sensing the distance to a source of periodic oscillations in a nonlinear chemical medium with the output information coded in frequency of excitation pulses,
    Phys. Rev. E, 72, 046201, (2005).
    DOI: 10.1103/PhysRevE.72.046201
  24. We found a certain kind of spatial geometry of excitable medium works as distance and direction detector.


    2003

  25. Górecka J. N., Górecki J.
    T-shaped coincidence detector as a band filter of chemical signal frequency,
    Phys. Rev. E, 67, 067203, (2003).
    DOI: 10.1103/PhysRevE.67.067203
  26. We discovered that T-shaped spatial geometry of excitable medium works as a band filter of signal (propagating waves on the medium) frequency.

  27. Górecki J., Yoshikawa K. and Igarashi Y.
    On chemical reactors that can count,
    J. Phys. Chem. A, 107, 1664 - 1669 (2003).
    DOI: 10.1021/jp021041f
  28. In this article, we discovered that a certain kind of spatial geometry of excitable medium works as a signal (propagating waves on the medium) counter.


    2002

  29. Górecki J., Yoshikawa K., Igarashi Y.
    Direct information processing in nonlinear chemical systems,
    Seminars on Chemical Physics under Microgravity 2001-2002,
    National Space Development Agency of Japan , 107-110, (2002).
  30. Report about frequency transformer for sequence of propagating waves on the chemical excitable medium.


 

Video clip(s):

    Our group employ Belousov - Zhabotinsky (BZ) reaction as excitable media in experimental study. This system is famous for its unique and attractive property.
    One of the most correct and reliable introduction of the reaction can be found in Scholar pedia about "Belousov-Zhabotinsky reaction".

    "The BZ reaction makes it possible to observe development of complex patterns in time and space by naked eye on a very convenient human time scale of dozens of seconds and space scale of several millimeters." (from Scholar pedia)

    To show this amazing reaction, here we provide a short video clip in triple speed.
You can see its periodical color change and then spatial pattern formation.
We apply this phenomenon to construct chemical information processing devices.

Note on this video clip:


Copyright © 2004 - 2011, Dep. 8, Institute of Physical Chemistry PAS   |   Webmaster