UK Nonlinear News , November 1997.

Announcements of Conferences and Meetings

East Midlands Mathematical Physics Seminars (October-November 1997)

A Joint Research Group (supported by the London Mathematical Society under a scheme 3 grant) gathering mathematicians and physicists from Loughborough University, University of Nottingham and Nottingham Trent University, is running a monthly, usually one-day, seminar, focusing on Mathematical Physics in the broad sense.

General meetings, with talks on different subjects, will alternate with specialised meetings devoted to a single topic (please notice that some meetings will be in Loughborough and some others in Nottingham).

Updated information will be kept on the web page

Funds are available to support the attendance of Ph.D. students and young postdocs from outside the East Midlands region, if needed.

The first meeting is in Loughborough on wednesday 29 October, with talks by Pierre Collet (Palaiseau), G. Derks (Guildford) and J. Lamb (Warwick).

In november there will be a two-days meeting, organised by A. Veselov, devoted to ``open problems in integrable systems''; the confirmed speakers are P. Clarkson (Canterbury), A. Fokas (Imperial), A. Mikhailov (Leeds), A. Newell (Warwick), F. Nijhoff (Leeds), E. Sklyanin (St. Petersbourg and Leeds), R. Ward (Durham), and A. Veselov (Loughborough).

Information about this special meeting will be available on the web page

For all information on the activity of the J.R.G., contact the coordinator, Giuseppe Gaeta (, or Slava Belavkin (, Vassili Kolokoltsov (, or Sasha Veselov (

Workshops on piecewise smooth systems (October-December 1997)

There is a workshop series at University of Bristol on

Analysis of Piecewise Smooth Systems and their Applications.


Source: Mario di Bernardo (


TIMSAC (Time Series and Applications) Study Group Meeting

Thursday, 13 November 1997, at 4 p.m.

The Royal Statistical Society, 12 Errol Street, London EC1 (Nearest Underground stations: Barbican, Moorgate)

N. GORDON (DERA Malvern)

" Bayesian Analysis of Nonlinear/ Non-Gaussian State Space Models with the SIR Filter "

M. PITT (Imperial College London)

" Methods for Non-Gaussian Measurement State Space Models "

A L L A R E W E L C O M E !


The SIR filter is an algorithm for implementing on-line Bayesian estimation of nonlinear/non-Gaussian dynamic models. In this talk we describe the SIR filter, outline some efficient implementation methods and illustrate performance with examples taken from engineering applications and financial time series analysis.

Tea break at 4:45 pm

This talk highlights efficient MCMC methods for the Bayesian analysis of state space models when the measurement density is not linear Gaussian. The posterior density typically leads to high correlations between the unobserved states. This problem is explored and methods to combat this problem are proposed and illustrated.

Information on TIMSAC can be found on

or contact

Bärbel Finkenstädt
Department of Zoology
University of Cambridge
Downing Street, Cambridge CB2 3EJ, UK
phone: +44 (0)1223 336644
fax: +44 (0)1223 334466


The first meeting will be held at UMIST. The speakers will be;

Mark Pollicott (University of Manchester) on

Stable ergodic properties of some group extensions

(11am-12pm, MSS/C19)

Peter Ashwin (University of Surrey) on

Generic drifts and noncompact symmetries

(1.20 pm-2pm, MSS B9)

Christian Beck (QMW) on

Scaling limits of skew products: From the Perron-Froebenius equation to the Fokker-Planck equation.

(2.15pm-3.15pm, MSS B10)

David Broomhead (UMIST) on

The dynamics of randomly forced systems.

(4pm-5pm, MSS B10)

Coffee and tea will be served at 10.30am and 3.00pm in the Coffee Room (MSS N2). There will be an evening meal after the talks.

All talks are held in the Mathematics and Social Sciences Building (MSS), UMIST.

Some fare information:

It is possible to buy Super-Apex return tickets (14 days advance purchase, subject to availability) from London to Manchester for £15. There are also Super-Advance return tickets (2 days advance purchase, subject to availability) for £34. If, however, you buy a ticket on the day and travel before 9.30 am the fare is £98 return.

If you are planning to attend please let me know so that I can mail travel information and better estimate the numbers for coffee etc...

For more information contact:

Matthew Nicol
Tel: 0161 200 3646

IEE colloquium on signals, systems and chaos
at the IEE, Savoy Place, London
on the 1st of December

Provisional programme:

10:55-11:00 Opening remarks

Fractal Channel Equalisation
Prof D.S. Broomhead, Dept of Mathematics, UMIST, Manchester

Nonlinear Dynamics and Noise Cancellation
Dr B. Mulgrew, Dept of EE, University of Edinburgh

Chaotic Noise Reduction:- Multiple Right Answers
Dr James Heald, Centre for Nonlinear Dynamics, UCL, London

13:00-14:00 Lunch

Nonlinear Dynamics of Sigma-Delta Modulators
Ronan Farrel, Dept of EE, University College Dublin, Dublin, Ireland

Poincare Maps and Pitch detection in speech
I. Mann, Dept of EE University of Edinburgh

15:20-15:40 Tea

State Space Reconstruction using interspike intervals
Dr J. P. Huke, Dept of Mathematics, UMIST, Manchester

Title to be confirmed
Dr Asoke Nandi, Dept of EEE, University of Strathclyde, Glasgow

17:00-17:30 Open Discussion

Source: Steve McLaughlin (


A working seminar on two dimensional dynamics will take place at Warwick starting in January 1998. Our plan is to study some recent techniques for understanding two-dimensional dynamical systems which are not hyperbolic but do have some weak form of hyperbolicity, e.g. the Henon maps and the return maps for Lorenz attractors.

There are absolutely no prerequisites and anyone is welcome to participate. At the moment the idea would be to meet twice a week but other arrangements could be made if participants would rather come once a week or even once every other week. For information please write to Stefano Luzzatto (

The second TUXEDO day
is to be held on
Friday 9 January 1998
at the
Mathematics Institute, University of Warwick
from 11am to 5.15pm

TUXEDO stands for "The U.K. Spatially Extended Dynamics Organisation", a collaboration between the Universities of Warwick and Cambridge and Queen Mary & Westfield College London, to encourage research into the dynamics of spatially extended systems in the U.K. . The programme will be posted at Speakers will include Alan Newell (Warwick), Claude Baesens (Cambridge) and John Ball (Oxford) who will be giving the Warwick Mathematics Colloquium. The meeting is supported by the London Mathematical Society. All are welcome to attend.

Source: R.S. MacKay (

Dynamics Special Session, BMC April 1998
(6-8 pril 1998)

The British Mathematical Colloquium will take place on 6-9 April 1998. The Dynamics Special Session will be on Wednesday 8 April. The speakers are:

11.30-12.30 J-C Yoccoz (College de France and Universit\' e de Paris Sud)

Dynamics near homoclinic bifurcations

2.00-2.50 Sebastien van Strien (Warwick)

3.00-4.00 Lai Sang Young (UCLA)

The speed of mixing in chaotic dynamical systems

Further details can be found on the BMC web page, or contact

Astrophysical and Geophysical Flows as Dynamical Systems (22 June to 28 August 1998)
Program of Summer Study in Geophysical Fluid Dynamics
Woods Hole Oceanographic Institution

Many problems in the astrophysical and geophysical sciences surround fluid flows of a very complicated nature. In most situations, the flows are turbulent, and often the problems of interest are complicated further by other physical effects such as rotation, magnetic fields and chemical and phase changes. Over the last decades, dynamical systems techniques have been fashioned and usefully applied to a variety of relatively simple systems. Attempts have also been made to apply these techniques to the much more complicated problems in astro and geophysics. Yet how far can this kind of approach be taken?

In the 1998 summer study program, the focus will be on the application of dynamical systems techniques in astro- and geophysical flows. The techniques will be described in detail, and the successes to date in applying them to various problems will be explored. A major, provocative theme of the summer will be whether these techniques allows us anything more than a light, qualitative explanation of the phenomena we see.

The introductory lectures will consist of a discussion of astrophysical and geophysical problems by Antonello Provenzale, paralleled with tutorials on dynamical systems by Charles Tresser and J. D. Crawford.

The ten-week summer study program in Geophysical Fluid Dynamics is held annually at the Woods Hole Oceanographic Institution, a private research and educational institution located 80 miles south of Boston on Cape Cod. Up to ten competitive fellowships are available for graduate or postdoctoral students.

Successful applicants will receive stipends of $3,900 and an allowance for travel expenses within the United States. Fellows are expected to be in residence for the full ten weeks of the program. The application deadline is February 14, 1998. Awards will be announced by April 1, 1998. We particularly encourage applications from women and members of underrepresented groups. Application forms may be obtained from:

Education Office, Clark Laboratory, MS #31
Fellowship Committee
Woods Hole Oceanographic Institution
360 Woods Hole Road Woods Hole, MA 02543-1541
Phone: (508)289- 2219
FAX: (508)457-2188

Further information and an electronic application form for student fellowships are available online at

Prospective senior visitors, please contact Neil Balmforth, the Program Coordinator, by email at

Source: Dynamics Notes Volume 1997: Number 003.

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