UK Nonlinear News, November 1997

Situations Vacant

Cambridge/University College London

Applications are invited for a


BBSRC and EPSRC are jointly funding a 3-year project entitled

Stochastic models for the immuno-epidemiology and population
genetics of macroparasites in farmed ruminants

The Joint Principal Investigators are:

Dr Bryan Grenfell, Zoology Department, Cambridge University, UK (;
Professor Valerie Isham, Department of Statistical Science, University College, London, UK (


To develop a new family of stochastic models for the dynamics of gastro-intestinal nematode parasites in farmed ruminants, which allow accurately for the generation of parasite aggregation by spatial variation in transmission and heterogeneity in host immune responses.

The models will be applied - along with analyses of published and novel epidemiological data - to explore: (a) short and long-term temporal dynamics of parasitism; (b) parasite population genetics (in particular, the persistence of rare parasite genotypes); (c) the population dynamics and genetics of parasite resistance against anthelmintic drugs.

Methodology will involve a combination of stochastic modelling, including approximation and simulation, and empirical data analysis to develop models for (a) the dynamics of parasites within hosts and host immunity; (b) comparison of a family of spatial models and non-spatial approximations for the parasite transmission process.

SUITABLE CANDIDATES will possess good mathematical expertise (ideally with experience of stochastic and spatial processes) and strong programming skills. Either a mathematical/physical science or a quantitative biological background would be appropriate. The project provides an ideal opportunity for either physical scientists or biologists to move into the mathematical biology field.

The successful candidate will spend time in both London and Cambridge groups and could be based in either centre.

For further details, contact Bryan Grenfell and Valerie Isham at the above email addresses.

Deadline for applications: 30 NOVEMBER 1997.

Non-linear Problems of Industrial Physics, Hewlett Packard Laboratories, USA.

The National Science Foundation, the College of William and Mary, and Hewlett Packard Research Laboratories in Palo Alto are sponsoring a three year postdoctoral position focused on applications of non-linear dynamics. The initial project involves automated modeling procedures for characterising non-linear electrical (e.g., microwave) and mechanical components. Candidates should have a PhD in physics, electrical engineering, or applied mathematics with solid skills and experience in two or more of the following areas: non-linear dynamics, mathematical modelling, microwave engineering, scientific and object oriented programming, DSP's and embedded processors, or measurement instrumentation.

For additional details contact
Nicholas Tufillaro
Hewlett Packard Laboratories
Palo Alto CA 94304-1126

Source: Dynamics Notes Volume 1997: Number 003.

Sao Paulo State University, Brazil


Postdoctoral position in Soliton Dynamics and related fields

RESEARCH AREA: Multiple scale methods in perturbation theory. Soliton dynamics. Integrable evolution equations. Long and short wave asymptotics.

There will be a postdoc position at IFT-UNESP beginning AUGUST 1, 1998. The position is for one year, renewable for a second year. Applicants should send a CV and two letters of recommendation to:

Roberto A. Kraenkel
R. Pamplona 145
01405-900 Sao Paulo BRAZIL

DEADLINE: January 31, 1998.

A first selection will take place by February 15, 1998. The CV of the selected candidate will be submitted to a science funding agency of the State of Sao Paulo, which will take the final decision of awarding or not a fellowship. The present monthly value of the fellowship is R$ 2570.00, corresponding to approximately U$ 2336.00 (tax-free). Travel expenses are not covered.

For informations about IFT-UNESP, please look at

Cambridge University

EPSRC Research Assistantship

"Dynamics of Non-Expanding Maps: Theory and Application to Discrete Event Systems".


*Department of Pure Mathematics and Mathematical Statistics, Cambridge University, UK.
**Basic Research Institute in the Mathematical Sciences, Hewlett-Packard Research Labs, Filton (nr Bristol), UK.

Applications are invited for a 3-year EPSRC funded postdoctoral research assistantship to work with Dr Colin Sparrow (Cambridge, DPMMS) and Dr Jeremy Gunawardena (BRIMS).

The project aims to make progress in understanding the dynamics of maps which are non-expanding in the sup norm. In many application areas, for example discrete event systems (including networks of linked processors), scheduling problems of various kinds, Bellman operators of games or of Markov decision processes, input-output models in mathematical economics, models of nonlinear diffusion, and in the theory of nonnegative matrices, it is natural to consider maps on R^n which are homogeneous and monotonic, and therefore non-expanding in the sup norm. One basic question is to understand how dynamical information (such as the rate at which trajectories go to infinity) can be used to infer the existence of fixed points. More general questions about maps which are non-expanding are also of interest. We also aim to develop an appropriate theory of stability for dynamical behaviours under perturbations relevant to particular applications (for example a change in the architecture of a network).

Applicants should have, or shortly expect to receive, a PhD in a relevant area of mathematics, or in one of the application areas. Preference will be given to candidates with experience of one or more of the following:

The successful applicant will be based in Cambridge, and will visit BRIMS on a regular basis. BRIMS is the UK node of a related EC TMR Research Network, ALAPEDES, and maintains close links with the main researchers in the field in Europe and America.

The post will be available from 1st June 1998, and must be taken up by 1st December 1998. The appointment will be made on the RA 1A Scale (15,159 - 21,016 pounds, depending on age). In certain circumstances, it may be possible for applicants wishing to start earlier to spend some time in BRIMS in the period leading up to 1st June.

Enquiries and applications should be made to: Dr Colin Sparrow, Department of Pure Mathematics and Mathematical Statistics, 16 Mill Lane, Cambridge CB2 1SB. E-mail: Tel: (44)-1223-337950.

For more information about BRIMS and the TMR network ALAPEDES, see

Brigham Young University, United States

Postdoctoral Position

The Nonlinear Analysis Laboratory (NAL) at Brigham Young University announces a possible one year (one year renewal possible) post doctoral position for the 1998-1999 academic year, starting date: Sept. 1, 1998. The NAL is associated with the Department of Mathematics. Professor Peter Bates is currently the director of the NAL. Requirements include a recent Ph.D. in mathematics and demonstrated research ability in nonlinear science (laboratory emphasis is in partial differential equations.) Duties involve research and teaching. To ensure full consideration, applicants should send their curriculum vitae, a statement of research interests, official transcripts and at least three letters of recommendation before January 1, 1998 to:

Recruitment Committee Chair
Department of Mathematics
Brigham Young University
Provo, Utah 84602.
BYU is one of the largest private universities in the U.S. and is sponsored by the Church of Jesus Christ of Latter-day Saints. Applications from women and minorities are especially welcome; BYU is an equal opportunity employer. Hiring is contingent upon eligibility to work in the U.S. The successful applicant will be expected to conform to the BYU honour code.



Post-Doctoral Research Associate (RA1A)


An EPSRC-funded research associate position is currently available for work on the above topic for a period of about two years with Professor AT Walden. Applicants should have, or expect soon to have, a PhD in Mathematics or Statistics, and extensive knowledge and experience of wavelets and time series analysis. Good computing skills are also required.

The salary (in British pounds) will be in the RA1A range 15,159 - 17,606 p.a. plus London Allowance of 2,134.

Applications, with a CV, list of publications and names of at least two referees, and a stamped addressed envelope, should be sent by 28th November 1997 to: Professor A T Walden, Mathematics Department, Imperial College, 180 Queen's Gate, London SW7 2BZ; tel 0171-594 8524; fax 0171-594 8517; email: A formal application form is not issued.

Further Particulars:

The Department of Mathematics at Imperial College is one of the largest in the UK, with 48 academic staff (including 15 Professors), some 19 Research Associates/Fellows, and a steady flow of international visitors. In addition, the Department is fortunate in having a number of eminent Emeritus Professors and Senior Research Fellows who play a continuing role in the research life of the Department.

The Department acts as a unified whole in most respects, but for organisational convenience is broken into sections with distinctive research directions: Statistics, Applied Mathematics, Numerical Analysis, Mathematical Physics, and Pure Mathematics.

The Statistics Section has 2 Professors, 3 Visiting Professors, 1 Senior Lecturer and 5 Lecturers. Currently there are 13 postgraduate students and 3 postdoctoral staff. Research areas include Bayesian theory and computation, applied probability, time series and spectral analysis, differential geometry, and design of experiments. Significant research funding is contributed by industrial sponsors in such areas as pharmacokinetics and geophysical time series analysis.

Professor A F M Smith is the past President of the Royal Statistical Society, and received the Guy Medal in Silver from the Society. Visiting Professor John Nelder FRS was awarded the Thomas L Saaty Prize (1990) by the American Journal of Mathematical and Management Sciences. Professor Andrew Walden has served as an Associate Editor for the journal Biometrika and Dr. Jon Wakefield is an Associate Editor for Applied Statistics and a member of the Research Section Committee of the Royal Statistical Society. Many invited lectures at international conferences have been given by members of the Section.

The Department has its own library facilities which are excellent by UK standards. Mathematical Reviews and the Citation Index are both available in an electronic form. The Section has its own cluster of SUN workstations with extensive software and high quality graphics and black and white and colour Postscript printers. In total, the Department has fourteen IBM RS 6000s, 20 SUNs, 8 DEC Alphas and the undergraduate teaching laboratories have 34 NAGA 486 DOS5 workstations and 24 RM Pentiums. The Department's Computer Officer provides technical support for computer users and runs a surgery for those with computer problems. The College also has a central advisory service, including a telephone helpline.

University of Cambridge

Research Assistant (Mathematician, Physicist, Statistician)

Department of Plant Sciences, University of Cambridge, in collaboration with Biomathematics and Statistics, Scotland (BioSS)

A three year post (Salary scale RA1A) is available for a BBSRC-funded project on:

Scaling up from individual to population behaviour in stochastic, spatially-extended systems

A mathematician, physicist or statistician is required to work on the interface between mathematical modelling and experimentation (for model testing and construction). The project will develop and test a protocol for scaling up from individual to population behaviour in spatially extended botanical and animal epidemics using a combination of spatially explicit stochastic models and nonlinear mean field approximations. The post offers the opportunity to collaborate in a strategically important area of mathematical biology, on the link between modelling, ecological experimentation, and data collection and parameter estimation. The project will characterise the sensitivity of spatially explicit models and their equivalent mean field approximations to changes in individual interactions effected by biological treatments (here typified by biological control agents).

The successful candidate will be a key member of a thriving research group working on theoretical and experimental aspects of plant, animal and microbial populations within the Department of Plant Sciences at Cambridge, and will be supervised by Dr C.A. Gilligan, a mathematical biologist, and Dr, A. Kleczkowski, a mathematical modeller. Additional supervision will be provided by a mathematician, Dr G. Gibson (BioSS, Edinburgh), whose participation in the project is funded through additional research funds from the Scottish Office Agriculture Environment and Fisheries Department. Both the Cambridge and Edinburgh groups have strong links with the U.K. and International community of mathematicians and biologists working on dynamical systems, stochastic processes and mathematical biology.

The post would be ideally suited to a talented researcher with experience in stochastic processes, statistical physics, and nonlinear dynamics but individuals with qualifications in other areas of applied mathematics, statistics and modelling are encouraged to discuss the position with the principal investigators. A Ph.D. is required. Some knowledge of the theory of spatially-extended systems and Cellular Automata would be an advantage.

Applications, including a Curriculum Vitae and the names of two referees should be sent to:

Dr C.A. Gilligan, Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, by 20 October 1997 from whom further details may be obtained.

(Fax 0223 333953; Email

Los Alamos National Laboratory, United States

Postdoctoral Appointments

Description: Research opportunities are granted in many areas of chemistry, mathematics, computer science, materials science, biological sciences, environmental science, geoscience, and many engineering fields. Appointments are available for two years, subject to renewal for a third year. A postdoctoral committee meets to review candidates for postdoctoral appointments in February, May, August, and December.

Eligibility Candidates must be recipients of a doctoral degree within the past three years.

Grant amount: Starting salary: $41,250-$44,570.

Application Information: Los Alamos National Laboratory is an Equal Opportunity Employer. For initial consideration, send résumé with publication listing to Mary Anne With, Mail Stop P-282, Los Alamos National Laboratory, Los Alamos, NM 87545.


Niels Bohr Institute and Center for Chaos and Turbulence Studies, Copenhagen

The Niels Bohr Institute and Center for Chaos and Turbulence Studies has theoretical and/or experimental openings at post-doctoral level for research in statistical physics, complex systems, fractals and self- organisation in physics and biology, classical and quantum chaos, turbulence and related fields. (For detailed information see

Three of the positions are funded by the EU networks on ``Non-linear Dynamics of Extended Systems'' (coordinated by T. Bohr), ``Fractals and Self-organisation'' (coordinated by P. Bak) and ``Intermittency'' (coordinated by M.H. Jensen), and are open for applicants from EU countries, Norway, Israel and Switzerland.

Applications should include a curriculum vitae, list of publications and a description of research interests and goals. In addition, applicants should arrange for 2-3 letters of reference to be sent directly. All material to be sent to:

Dorte Glass, Secretary
CATS, Niels Bohr Institute
Blegdamsvej 17, DK-2100 Copenhagen OE
Fax no: +45 35 32 54 25, phone no +45 35 32 53 28

The deadline for receipt of applications is 12 December 1997.

Source: Dynamics Notes Volume 1997: Number 003.

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