INTERNATIONAL JOURNAL

of

CHAOS THEORY  and  APPLICATIONS

Vol. 2, Issue # 2, 1997

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INTERNATIONAL JOURNAL OF CHAOS THEORY AND APPLICATIONS                     Vol. 2, Nr. 2  (1997)

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Regular paper

Synchronization and its Dynamical Recombination in Associative Memory based on a Chaotic Neural Network
 T. Nagashima, J. Miyazaki, Y. Shiroki and I. Tokuda

Abstract -- not available.

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Regular paper

Bifurcation Communication with Novel Chaotic Transistors Circuits
   Cong-Kha Pham
   Department of Information Systems, Tokyo University of Information Science, Chiba, 265 Japan

Abstract. In the previous works, a Chaotic Transistors (CT) circuit which displays a bifurcation phenomena along with a variation of a sampling clock frequency was described. Also, a synchronization phenomena between two CT circuits has been observed. In this brief paper, a bifurcational communication based on two CT circuits is described. The synchronisation phenomena between two CT circuits is skilfully used to perform the bifurcational communication, in which a value of the sampling clock frequency of a transceiver circuit (1st CT circuit) is an information which is recovered at a receiver circuit (2nd CT circuit) when the synchronisation phenomena between them is retrieved.

Keywords: Chaotic Transistors circuit, chaotic synchronisation, periodic synchronisation, bifurcation communication

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Regular paper

Nonlinear Processes in Speech Production
 H.N. Teodorescu, Florin Grigoras, Vasile Apopei

Abstract. Several techniques used in the analysis of dynamic non-linear systems are applied in order to evidence and analyse some of the non-linear characteristics of speech signal production. It is shown that the maximal Lyapunov exponent varies in a close relation to the pitch frequency inside vowels.

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Short paper

Bifurcation In Pressurized Water Reactors
   G. Cocquyt and K. Schram
   Dept. Industriele Wetenschappen en Technologie, Hogeschool Limburg, Belgium

Abstract. Two types of nuclear plants are compared, from the point of view of possible development of chaotic behavior. By correction of the simplified model, it is shown that pressurized water reactors could also develop chaos.

Keywords: nuclear power plant; bifurcation; pressurized water reactor; PWR model

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Report on industrial research

Research Activities in Soft Computing and Chaos Theory at SGS-THOMSON Microelectronics
   Luigi Occhipinti, Mario Lavorgna and Riccardo Caponetto
    SGS Thomson, Italy

Abstract -- not available.

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Bulletin Section

Abstracts not available.

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