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An international conference. titled Nonlinear Phenomena in Chemical
Dynamics was held in Bordeaux on September 7-11, 1981. The present
volume contains the text of lectures and abstracts of posters
presented during the meeting. This conference is part of a series
of scientific multidisciplinary meetings in which chemistry is
involved at various levels. Amongst the most recent ones let us
mention Aachen 1979, Bielefeld 1979, New York 1979, Elmau 1981. In
addition, this meeting is a direct extension of the first one that
took place in Bordeaux in 1978 on the topic "Far from equilibrium:
instabilities and structures," at the conclusions of which we could
write (cf. Far fram Equilibrium, Springer Series in Synergetics,
Vol. 3): "The three key words, far fram equilibriUm, instabilities
and structuPes, best illustrate the new concepts which emerge from
the description of the dynamics of various systems relevant to many
different research areas. " The present proceedings show how much
these remarks have remained true, even though substantial progress
has been achieved during the three last years. To get a, deeper
experimental knowledge of open reacting systems, to model and
simulate reaction-diffusion systems, to develop the mathematical
theory of dynamical sys tems, these are the main direction in
current investigations."
Markedly apart from elementary particle physics, another current
has been building up and cont i nuous ly growi ng within
contemporary phys i cs for severa 1 decades, and even expanding
into many other disciplines, especially chemistry, biology and,
quite recently, economics. Several reasons account for this:
presumably the most impor- tant one lies in the fact that, whatever
the specific problem, model or material concerned, the same basic
mathematical features are always involved. In this way, a general
phenomenology has emerged which, unlike thermodynamics, is no
longer depen- dent upon the details or specifics: what largely
prevails is the nonlinear charac- ter of the underlying dynamics.
Perhaps we are witnessing the emergence of a "non- linear physics"
- in a way similar to the birth of "quantum physics" in the twen-
ties - a physics which deals with the general behaviour of systems,
whatever they are or may be. Over the past fifteen years, chemical
systems evolving sufficiently far from equilibrium have proved to
be particularly well fitted to experimental research on nonlinear
behaviour: oscillation, multistability, birhythmicity, chaotic
evolution, spatial self-organization and hysteresis are displayed
by chemical reactions whose number is growing each year. In this
volume are collected the lectures, communica- tions and posters
(abstracts) presented at an international meeting entitled:
"Non-Equilibrium Dynamics in Chemical Systems", held in Bordeaux
(France), Septem- ber 3 rd-lth, 1984.
This volume gathers most of the lectures and communications
presented at the meeting t held in Bordeaux from the 27th to the 29
h of September and entitled "Far from equi librium: instabilities
and structures." This meeting is part of a series of seve ral other
interdisciplinary conferences such as Elmau 1972, London 1974,
Dortmund 1976, Elmau 1977, Tokyo 1978. The old science
classification scheme proposed by Auguste Comte tends to be eve ry
day a bit more blurred out: one gives here, if needed, one
additional illustra tion of this trend. The three key words "far
from equilibrium," "instabilities" and "structures" best illustrate
the new concepts which emerge from the description of the dynamics
of various systems relevant to many different research areas. Laser
emission, chemical reactions, fluid motions, exhibit very
particular phenomena when, under appropriate external action, they
occur far from equilibrium. These proceedings include the
experimental description of such phenomena as well as theoretical
at tempts in understanding them. Most of the topics investigated
here belong to the domains of physics and chemistry but one should
be careful not to underestimate the underlying potential biological
interest. If the study of simple systems (e. g., described by a few
variables) has been qui te successful for several centuries, the
recent bearing of our attention on complex systems constitutes a
genuine epistemological breakthrough bridging the gap which used to
exist between the sciences and the humanism."
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