## Overview

As well as being a member of the Mathematics department you can also view my profile on the Environment and Sustainability Institute website.

Post doc at Warwick, Mathematics Institute 1986 - 1988, followed by a post doc at Bath, School of Math. Sci., 1988-1990. Joined Exeter in 1990 as lecturer, promoted to Reader in 1996 and Professor in 1999. Head of Dept. Mathematics 2003-2005, Associate Dean in the Postgraduate Faculty, 2003 - 2005.

**Research Interests**

- Mathematical systems theory,
- Dynamical systems,
- Control theory,
- Population dynamics,
- Systems biology.

**Teaching Interests**

- Matrix theory,
- Numerical linear algebra,
- Systems theory,
- Signal processing,
- Mathematical biology.

**Other Relevant Information **

**Qualifications** : BSc, Mathematics, Warwick, PhD, Engineering, Warwick

## Publications

_{Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.}

| 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 | 1995 | 1993 | 1992 | 1991 | 1990 | 1989 | 1988 | 1987 |

### 2024

- Menneer T, Mueller M, Sharpe RA, Townley S. (2024) Corrigendum to “Modelling mould growth in domestic environments using relative humidity and temperature” [Build. Environ. 208 (2022) 108583] (Building and Environment (2022) 208, (S0360132321009756), (10.1016/j.buildenv.2021.108583)),
*Building and Environment*, volume 255, DOI:10.1016/j.buildenv.2024.111438.

### 2023

- Bolton K. (2023) Towards a computational tool for the management of Natural Capital.
- Dong S, Das S, Townley S, Thornton A. (2023) Swarm Intelligence Based Drone Flocking Model,
*2023 28th International Conference on Automation and Computing (ICAC)*, 30th Aug - 1st Sep 2023,*2023 28th International Conference on Automation and Computing (ICAC)*, DOI:10.1109/icac57885.2023.10275209. [PDF] - Woods R, Menneer T, Wellaway I, Broughton B, Williams AJ, Sharpe RA, Townley S, England M, Taylor T, Morrissey K. (2023) Smartline Environmental Sensor Data and Utility Usage, 2017–2023, DOI:10.5255/UKDA-SN-856596. [PDF]
- Alsubhi M. (2023) Cyber-Natural Control Systems.
- Joshi H, Yavuz M, Townley S, Jha BK. (2023) Stability analysis of a non-singular fractional-order covid-19 model with nonlinear incidence and treatment rate,
*Physica Scripta*, volume 98, no. 4, pages 045216-045216, DOI:10.1088/1402-4896/acbe7a. [PDF] - Brakes P. (2023) The significance of non-human culture for the conservation of cetaceans and other vertebrates.
- Menneer T, Mueller M, Townley S. (2023) A cluster analysis approach to sampling domestic properties for sensor deployment,
*Building and Environment*, volume 231, pages 110032-110032, article no. 110032, DOI:10.1016/j.buildenv.2023.110032. [PDF] - Alrashedi Y. (2023) Localised vs. Centralised Management Of Spatially Distributed Populations.
- Guiver C, Rebarber R, Townley S. (2023) Low-gain integral control for a class of discrete-time Lur'e systems with applications to sampled-data control,
*INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL*, volume 33, no. 3, pages 1410-1437, DOI:10.1002/rnc.6455. [PDF] - Kumar Panda D, Das S, Townley S. (2023) Hyperparameter optimized classification pipeline for handling unbalanced urban and rural energy consumption patterns,
*Expert Systems with Applications*, volume 214, pages 119127-119127, article no. 119127, DOI:10.1016/j.eswa.2022.119127. [PDF]

### 2022

- Panda DK. (2022) Data Analytics and Control for Stability and Resilience of Future Smart Grids.
- Edholm CJ, Guiver C, Rebarber R, Tenhumberg B, Townley S. (2022) Stabilization by Adaptive Feedback Control for Positive Difference Equations with Applications in Pest Management,
*SIAM Journal on Control and Optimization*, volume 60, no. 4, pages 2214-2245, DOI:10.1137/21m1398240. - Franco D, Guiver C, Smith P, Townley S. (2022) A switching feedback control approach for persistence of managed resources,
*Discrete and Continuous Dynamical Systems - B*, volume 27, no. 3, DOI:10.3934/dcdsb.2021109. - Panda DK, Das S, Townley S. (2022) Toward a More Renewable Energy-Based LFC Under Random Packet Transmissions and Delays With Stochastic Generation and Demand,
*IEEE Transactions on Automation Science and Engineering*, volume 19, no. 2, pages 1217-1232, DOI:10.1109/tase.2020.3042570. [PDF]

### 2021

- Menneer T, Mueller M, Sharpe RA, Townley S. (2021) Modelling mould growth in domestic environments using relative humidity and temperature,
*Building and Environment*, DOI:10.1016/j.buildenv.2021.108583. - Guiver C, Poppelreiter N, Rebarber R, Tenhumberg B, Townley S. (2021) DYNAMIC OBSERVERS FOR UNKNOWN POPULATIONS,
*DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B*, volume 26, no. 6, pages 3279-3302, DOI:10.3934/dcdsb.2020232. [PDF] - Parfett A, Townley S, Allerfeldt K. (2021) AI-based healthcare: a new dawn or apartheid revisited?,
*AI and Society*, volume 36, no. 3, pages 983-999, DOI:10.1007/s00146-020-01120-w.

### 2020

- Jones O, Ezard THG, Dooley C, Healy K, Hodgson D, Mueller M, Townley S, Salguero-Gómez R. (2020) My family and other animals: Human demography under a comparative cross-species lens,
*Human Evolutionary Demography*, Open Science Framework. [PDF] - Naik PA, Yavuz M, Qureshi S, Zu J, Townley S. (2020) Modeling and analysis of COVID-19 epidemics with treatment in fractional derivatives using real data from Pakistan,
*The European Physical Journal Plus*, volume 135, no. 10, article no. 795, DOI:10.1140/epjp/s13360-020-00819-5. [PDF]

### 2019

- Gianuca D, Votier SC, Pardo D, Wood AG, Sherley RB, Ireland L, Choquet R, Pradel R, Townley S, Forcada J. (2019) Sex-specific effects of fisheries and climate on the demography of sexually dimorphic seabirds,
*J Anim Ecol*, volume 88, no. 9, pages 1366-1378, DOI:10.1111/1365-2656.13009. [PDF] - Argyropoulos A, Townley S, Upton PM, Dickinson S, Pollard AS. (2019) Identifying on admission patients likely to develop acute kidney injury in hospital,
*BMC Nephrol*, volume 20, no. 1, DOI:10.1186/s12882-019-1237-x. [PDF]

### 2018

- Nicol‑Harper A, Dooley C, Packman D, Mueller M, Bijak J, Hodgson D, Townley S, Ezard T. (2018) Inferring transient dynamics of human populations from matrix non-normality,
*Population Ecology*, DOI:10.1007/s10144-018-0620-y. - Edholm CJ, Tenhumberg B, Guiver C, Jin Y, Townley S, Rebarber R. (2018) Management of invasive insect species using optimal control theory,
*Ecological Modelling*, volume 381, pages 36-45, DOI:10.1016/j.ecolmodel.2018.04.011.

### 2017

- Guiver C, Logemann H, Townley S. (2017) Low-gain integral control for multi-input multioutput linear systems with input nonlinearities,
*IEEE Transactions on Automatic Control*, volume 62, no. 9, pages 4776-4783, DOI:10.1109/TAC.2017.2691301. - Guiver C, Packman D, Townley S. (2017) A necessary condition for dispersal driven growth of populations with discrete patch dynamics,
*J Theor Biol*, volume 424, pages 11-25, DOI:10.1016/j.jtbi.2017.03.030. [PDF] - Bill A, Guiver C, Logemann H, Townley S. (2017) The converging-input converging-state property for Lur’e systems,
*Mathematics of Control, Signals, and Systems*, volume 29, no. 1, DOI:10.1007/s00498-016-0184-3. - McDonald JL, Franco M, Townley S, Ezard THG, Jelbert K, Hodgson DJ. (2017) Divergent demographic strategies of plants in variable environments,
*Nature Ecology & Evolution*, volume 1, no. 2, article no. 0029, DOI:10.1038/s41559-016-0029. [PDF] - Gianuca D, Phillips RA, Townley S, Votier SC. (2017) Global patterns of sex- and age-specific variation in seabird bycatch,
*Biological Conservation*, volume 205, pages 60-76, DOI:10.1016/j.biocon.2016.11.028.

### 2016

- Guiver C, Hodgson D, Townley S. (2016) A note on the eigenvectors of perturbed matrices with applications to linear positive systems,
*Linear Algebra and Its Applications*, volume 509, pages 143-167, DOI:10.1016/j.laa.2016.07.010. - Bill A, Guiver C, Logemann H, Townley S. (2016) Stability of nonnegative Lur'e systems,
*SIAM Journal on Control and Optimization*, volume 54, no. 3, pages 1176-1211, DOI:10.1137/140994599. - Mcdonald JL, Stott I, Townley S, Hodgson DJ. (2016) Transients drive the demographic dynamics of plant populations in variable environments,
*Journal of Ecology*, volume 104, no. 2, pages 306-314, DOI:10.1111/1365-2745.12528. - Guiver C, Edholm C, Jin Y, Mueller M, Powell J, Rebarber R, Tenhumberg B, Townley S. (2016) Simple Adaptive Control for Positive Linear Systems with Applications to Pest Management,
*SIAM Journal on Applied Mathematics*, volume 76, no. 1, pages 238-275, DOI:10.1137/140996926. [PDF] - Guiver C, Mueller M, Hodgson D, Townley S. (2016) Robust set-point regulation for ecological models with multiple management goals,
*J Math Biol*, volume 72, no. 6, pages 1467-1529, DOI:10.1007/s00285-015-0919-7. [PDF]

### 2015

- Ruiz A, Owens DH, Townley S. (2015) L
2 approximation properties of recurrent neural networks,*1997 European Control Conference (ECC)*, DOI:10.23919/ecc.1997.7082360. - Guiver C, Logemann H, Rebarber R, Bill A, Tenhumberg B, Hodgson D, Townley S. (2015) Integral control for population management,
*J Math Biol*, volume 70, no. 5, pages 1015-1063, DOI:10.1007/s00285-014-0789-4. [PDF] - Ilchmann A, Townley S. (2015) Adaptive high-gain fast-sampling P-control,
*ECC 1997 - European Control Conference*, pages 1767-1772. - Guiver C, Dreiwi H, Filannino D-M, Hodgson D, Lloyd S, Townley S. (2015) The role of population inertia in predicting the outcome of stage-structured biological invasions,
*Math Biosci*, volume 265, pages 1-11, DOI:10.1016/j.mbs.2015.04.005. [PDF]

### 2014

- Kuijper B, Johnstone RA, Townley S. (2014) The evolution of multivariate maternal effects,
*PLoS Comput Biol*, volume 10, no. 4, DOI:10.1371/journal.pcbi.1003550. [PDF] - Guiver C, Hodgson D, Townley S. (2014) Positive state controllability of positive linear systems,
*Systems and Control Letters*, volume 65, no. 1, pages 23-29, DOI:10.1016/j.sysconle.2013.12.002. - Eager EA, Guiver C, Hodgson D, Rebarber R, Stott I, Townley S. (2014) Bounds on the dynamics of sink populations with noisy immigration,
*Theor Popul Biol*, volume 92, pages 88-96, DOI:10.1016/j.tpb.2013.12.004. [PDF]

### 2013

- Townley S, Ezard THG. (2013) A G matrix analogue to capture the cumulative effects of nongenetic inheritance,
*J Evol Biol*, volume 26, no. 6, pages 1234-1243, DOI:10.1111/jeb.12089. [PDF]

### 2012

- Stott I, Hodgson DJ, Townley S. (2012) popdemo: an R package for population demography using projection matrix analysis,
*METHODS IN ECOLOGY AND EVOLUTION*, volume 3, no. 5, pages 797-802, DOI:10.1111/j.2041-210X.2012.00222.x. [PDF] - Stott I, Hodgson DJ, Townley S. (2012) Beyond sensitivity: nonlinear perturbation analysis of transient dynamics,
*METHODS IN ECOLOGY AND EVOLUTION*, volume 3, no. 4, pages 673-684, DOI:10.1111/j.2041-210X.2012.00199.x. [PDF] - Elragig A, Townley S. (2012) A new necessary condition for Turing instabilities,
*Mathematical Biosciences*, volume 239, no. 1, pages 131-138, DOI:10.1016/j.mbs.2012.04.006. - Li G, Weiss G, Mueller M, Townley S, Belmont MR. (2012) Wave energy converter control by wave prediction and dynamic programming,
*Renewable Energy*, volume 48, pages 392-403, DOI:10.1016/j.renene.2012.05.003. - Townley S, Rebarber R, Tenhumberg B. (2012) Feedback control systems analysis of density dependent population dynamics,
*Systems and Control Letters*, volume 61, no. 2, pages 309-315, DOI:10.1016/j.sysconle.2011.11.014. - Rebarber R, Tenhumberg B, Townley S. (2012) Global asymptotic stability of density dependent integral population projection models,
*Theor Popul Biol*, volume 81, no. 1, pages 81-87, DOI:10.1016/j.tpb.2011.11.002. [PDF]

### 2011

- Stott I, Townley S, Hodgson DJ. (2011) A framework for studying transient dynamics of population projection matrix models,
*Ecol Lett*, volume 14, no. 9, pages 959-970, DOI:10.1111/j.1461-0248.2011.01659.x. [PDF]

### 2010

- Stott I, Townley S, Carslake D, Hodgson DJ. (2010) On reducibility and ergodicity of population projection matrix models,
*Methods in Ecology and Evolution*, volume 1, pages 242-252, DOI:10.1111/j.2041-210X.2010.00032.x. - Stott I, Franco M, Carslake D, Townley S, Hodgson D. (2010) Boom or bust? A comparative analysis of transient population dynamics in plants,
*Journal of Ecology*, volume 98, no. 2, pages 302-311, DOI:10.1111/j.1365-2745.2009.01632.x.

### 2009

- Carslake D, Townley S, Hodgson DJ. (2009) Predicting the impact of stage-specific harvesting on population dynamics,
*J Anim Ecol*, volume 78, no. 5, pages 1076-1085, DOI:10.1111/j.1365-2656.2009.01569.x. [PDF] - Ke Z, Logemann H, Townley S. (2009) Adaptive sampled-data integral control of stable infinite-dimensional linear systems,
*Systems and Control Letters*. - Orosz G, Ashwin P, Townley S. (2009) Learning of spatiotemporal codes in a coupled oscillator system,
*IEEE Transactions on Neural Networks*. - Carslake D, Townley S, Hodgson DJ. (2009) Patterns and rules for sensitivity and elasticity in population projection matrices,
*Ecology*, volume 90, no. 11, pages 3258-3267, DOI:10.1890/08-1188.1. [PDF] - Lubben J, Boeckner D, Rebarber R, Townley S, Tenhumberg B. (2009) Parameterizing the growth-decline boundary for uncertain population projection models,
*THEOR POPUL BIOL*, volume 75, no. 2-3, pages 85-97.

### 2008

- Townley S, Hodgson DJ. (2008) Erratum et addendum: Transient amplification and attenuation in stage-structured population dynamics,
*Journal of Applied Ecology*, volume 45, no. 6, pages 1836-1839, DOI:10.1111/j.1365-2664.2008.01562.x. - Townley S, Hodgson DJ. (2008) Predicting transient amplification in perturbed ecological systems (vol 44, pg 1243, 2007),
*JOURNAL OF APPLIED ECOLOGY*, volume 45, no. 6, pages 1836-1839, DOI:10.1111/j.1365-2664.2008.01562.x. [PDF] - McCarthy D, Townley S, Hodgson D. (2008) On second order sensitivity for stage-based population projection matrix models,
*Theor Popul Biol*, volume 74, no. 1, pages 68-73, DOI:10.1016/j.tpb.2008.04.008. [PDF] - Macclean,M.M,Carslake,D.J., Evans MR, Townley S, Hodgson DJ. (2008) The usefulness of sensitivity analysis for predicting the effects of cat predation on the population dynamics of their avian prey,
*IBIS*, volume 150, pages 100-113. - Carslake D, Townley S, Hodgson DJ. (2008) Nonlinearity in eigenvalue-perturbation curves of simulated population projection matrices,
*Theor Popul Biol*, volume 73, no. 4, pages 498-505, DOI:10.1016/j.tpb.2008.03.004. [PDF]

### 2007

- Deines A, Peterson E, Boeckner D, Boyle J, Keighley A, Kogut J, Lubben J, Rebarber R, Ryan R, Tenhumberg B. (2007) Robust population management under uncertainty for structured population models,
*Ecol Appl*, volume 17, no. 8, pages 2175-2183, DOI:10.1890/06-1090.1. [PDF] - Ashwin P, Orosz G, Wordsworth J, Townley S. (2007) Dynamics on networks of cluster states for globally coupled phase oscillators,
*SIAM Journal on Applied Dynamical Systems*, volume 6, pages 728-758. [PDF] - Orosz G, Ashwin P, Wordsworth J, Townley S. (2007) Cluster synchronization, switching and spatio-temporal coding in a phase oscillator network,
*Proceedings of Applied Mathematics and Mechanics*, volume 7, pages 1030703-1030704. [PDF] - Orosz G, Ashwin P, Wordsworth J, Townley S. (2007) Cluster synchronization, switching and spatio-temporal coding in a phase oscillator network,
*Proceedings of Applied Mathematics and Mechanics*, volume 7, pages 1030703-1030704. [PDF] - Hodgson DJ, Carslake DJ, Kellie-Smith O, Townley S. (2007) Predicting transient amplification in disturbed natural systems,
*Journal of Applied Ecology*, volume 44, no. 6, pages 1243-1251, DOI:10.1111/j.1365-2664.2007.01333.x.

### 2006

- Townley S. (2006) WELL‐POSED LINEAR SYSTEMS (Encyclopedia of Mathematics and its Applications 103),
*Bulletin of the London Mathematical Society*, volume 38, no. 2, pages 351-352, DOI:10.1112/s0024609306213821. - Hodgson D, Townley S, McCarthy D. (2006) Robustness: predicting the effects of life history perturbations on stage-structured population dynamics,
*Theor Popul Biol*, volume 70, no. 2, pages 214-224, DOI:10.1016/j.tpb.2006.03.004. [PDF] - Rebarber R, Townley S. (2006) Robustness with respect to sampling for stabilization of Riesz spectral systems,
*IEEE Transactions on Automatic Control*, volume 51, pages 1519-1522.

### 2005

- Ilchmann A, Townley S, Thuto M. (2005) Adaptive sampled-data tracking for input-constrained exothermic chemical reaction models,
*Systems and Control Letters*, volume 54, no. 12, pages 1149-1161, DOI:10.1016/j.sysconle.2005.04.004. - Townley SB, Rebarber R, Logemann H. (2005) Generalized sampled-data stabilization of well-posed linear infinite-dimensional systems,
*SIAM Journal on Control and Optimization*, volume 44, no. 4, pages 1345-1369, DOI:10.1137/S0363012903434340. - Townley SB, Lamooki JRR, Osinga HM. (2005) Bifurcations and limit dynamics in adaptive control systems,
*International Journal of Bifurcation and Chaos*, volume 15, no. 5, pages 1641-1664, DOI:10.1142/S021812740501296X. - Emirsajlow Z, Townley S. (2005) On application of the implemented semigroup to a problem arising in optimal control,
*International Journal of Control*, volume 78, no. 4, pages 298-310, DOI:10.1080/00207170500093960.

### 2004

- Hodgson DJ, Townley S. (2004) Linking management changes to population dynamic responses: the transfer function of a projection matrix perturbation,
*Journal of Applied Ecology*, volume 41, no. 6, pages 1155-1161, DOI:10.1111/j.0021-8901.2004.00959.x. - Thuto, M.V., Ilchmann, A.. (2004) Input constrained adaptive l-tracking with applications to exothermic chemical reactor models,
*SIAM Journal on Control and Optimization*, volume 43, no. 1, pages 154-173. - Osinga HM, Lamooki GRR, Townley S. (2004) Numerical approximations of strong (un)stable manifolds,
*Dynamical Systems*, volume 19, pages 195-215.

### 2003

- Lamooki GRR, Townley S. (2003) Partial stability in back-stepping and adaptive control,
*"'Proceedings of the 9th IEEE International Conference on Methods and Models in Automation and Robotics, August 2003'"*, volume 1, pages 491-496. - Ozdemir N, Townley S. (2003) Integral-control by variable sampling based on steady state data,
*Automatica*, volume 39, pages 135-140. - Logemann, H.. (2003) Adaptive low-gain integral control of multivariable well-posed linear systems,
*SIAM Journal on Control and Optimization*, volume 41, no. 6, pages 1722-1732. - Townley SB, Crauel H, Matsikis I. (2003) Noise assisted high gain stabilization: Almost surely or in second mean,
*SIAM Journal on Control and Optimization*, volume 42, no. 5, pages 1834-1853, DOI:10.1137/S0363012901393900. - Townley TY, Townley S, Owens DH, Yu H. (2003) Norm optimal iterative learning plus prediction control,
*"Proceedings of the 9th IEEE International Conference on Methods and Models in Automation and Robotics, August 2003"*, volume 1, pages 539-544. - Townley SB, Logemann H, Rebarber R. (2003) Stability of infinite-dimensional sampled-data systems,
*Transactions of the American Mathematical Society*, volume 355, no. 8, pages 3301-3328, DOI:10.1090/S0002-9947-03-03142-8.

### 2002

- Rebarber R, Townley S. (2002) Nonrobustness of closed-loop stability for infinite-dimensional systems under sample and hold,
*IEEE Transactions on Automatic Control*, volume 47, no. 8, pages 1381-1385, DOI:10.1109/TAC.2002.801189.

### 2001

- Ilchmann A, Thuto M, Townley S. (2001) λ-Tracking for exothermic chemical reactions with saturating inputs,
*2001 European Control Conference, ECC 2001*, pages 1928-1933, DOI:10.23919/ecc.2001.7076204. - Rebarber R, Townley S. (2001) Robustness of closed-loop stability for infinite-dimensional systems under sample and hold - counterexamples,
*"Proc. Conference on Decision and Control, Sydney, December 2000"*, pages 3290-3295. - Ilchmann A, Thuto MV, Townley S. (2001) Lambda-tracking for exothermic chemical reactions with saturating inputs,
*"Proc. European Control Conference, Porto, September 2001"*, pages 1928-1933. - Ozdemir N, Townley S. (2001) Variable sampling integral control of infinite-dimensional systems,
*"'Proc. Conference on Decision and Control, Sydney, December 2000'"*, pages 3284-3289.

### 2000

- Ozdemir N, Townley S. (2000) Variable sampling integral control of infinite-dimensional systems,
*Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187)*,*Proceedings of the 48h IEEE Conference on Decision and Control (CDC) held jointly with 2009 28th Chinese Control Conference*, volume 4, DOI:10.1109/cdc.2000.912205. - Townley S, Ilchmann A, Weiss MG, McClements W, Ruiz AC, Owens DH, Pratzel-Wolters D. (2000) Existence and learning of oscillations in recurrent neural networks,
*IEEE Trans Neural Netw*, volume 11, no. 1, pages 205-214, DOI:10.1109/72.822523. [PDF] - Lefèvre L, Georges D, Emirsjlow Z, Townley S. (2000) Discussion on:: 'From PDEs with boundary control to the abstract state equation with an unbounded input operator:: A tutorial' by Z.!Emirsjlow and S.!Townley,
*EUROPEAN JOURNAL OF CONTROL*, volume 6, no. 1, pages 50-53, DOI:10.1016/S0947-3580(00)70909-5. [PDF] - Emirsjlow Z, Townley S. (2000) From PDEs with boundary control to the abstract state equation with an unbounded input operator: A tutorial,
*European Journal of Control*, volume 6, no. 1, pages 27-49, DOI:10.1016/S0947-3580(00)70908-3. - Rebarber R, Townley S. (2000) Robustness of closed-loop stability for infinite dimensional systems under sample and hold - Counterexamples,
*Proceedings of the IEEE Conference on Decision and Control*, volume 4, pages 3290-3294.

### 1999

- Townley S. (1999) An example of a globally stabilizing adaptive controller with a generically destabilizing parameter estimate,
*IEEE Transactions on Automatic Control*, volume 44, no. 11, pages 2238-2241, DOI:10.1109/9.802953. - Rebarber R, Townley S. (1999) Robustness with respect to delays for exponential stability of distributed parameter systems,
*SIAM Journal on Control and Optimization*, volume 37, no. 1, pages 230-244, DOI:10.1137/s0363012996312453. - Ilchmann A, Townley S. (1999) Adaptive high-gain λ-tracking with variable sampling rate,
*Systems and Control Letters*, volume 36, no. 4, pages 285-293, DOI:10.1016/S0167-6911(98)00101-7. - Logemann H, Ryan EP, Townley S. (1999) Integral control of linear systems with actuator nonlinearities: Lower bounds for the maximal regulating gain,
*IEEE Transactions on Automatic Control*, volume 44, no. 6, pages 1315-1319, DOI:10.1109/9.769399. - Ilchmann A, Townley S. (1999) Adaptive sampling control of high-gain stabilizable systems,
*IEEE Transactions on Automatic Control*, volume 44, no. 10, pages 1961-1966, DOI:10.1109/9.793786.

### 1998

- Ruiz A, Owens DH, Townley S. (1998) Existence, learning, and replication of periodic motions in recurrent neural networks,
*IEEE Trans Neural Netw*, volume 9, no. 4, pages 651-661, DOI:10.1109/72.701178. [PDF] - Logemann H, Ryan EP, Townley S. (1998) Low-gain integral control of linear distributed parameter systems subject to input saturation,
*Proceedings of the IEEE Conference on Decision and Control*, volume 1, pages 921-926. - Logemann H, Ryan EP, Townley S. (1998) Integral control of infinite-dimensional linear systems subject to input saturation,
*SIAM Journal on Control and Optimization*, volume 36, no. 6, pages 1940-1961, DOI:10.1137/S0363012996314142. - Rebarber R, Townley S. (1998) Generalized sampled data feedback control of distributed parameter systems,
*Systems and Control Letters*, volume 34, no. 5, pages 229-240, DOI:10.1016/S0167-6911(98)00011-5.

### 1997

- Curtain RF, Townley S, Logemann H, Zwart H. (1997) Well-posedness, stabilizability, and admissibility for Pritchard-Salamon systems,
*Journal of Mathematical Systems, Estimation, and Control*, volume 7, no. 4, pages 439-476. - Townley S. (1997) Guest editorial,
*IMA Journal of Mathematical Control and Information*, volume 14, no. 1, pages 1-2, DOI:10.1093/imamci/14.1.1. - Ilchmann A, Townley S. (1997) Adaptive high-gain fast-sampling P-control,
*ECC 1997 - European Control Conference*, pages 1767-1772, DOI:10.23919/ecc.1997.7082359. - Logemann H, Townley S. (1997) Adaptive control of infinite-dimensional systems without parameter estimation: An overview,
*IMA Journal of Mathematical Control and Information*, volume 14, no. 2, pages 175-206, DOI:10.1093/imamci/14.2.175. - Logemann H, Townley S. (1997) Low-gain control of uncertain regular linear systems,
*SIAM Journal on Control and Optimization*, volume 35, no. 1, pages 78-116, DOI:10.1137/S0363012994275920. - Logemann H, Townley S. (1997) Discrete-time low-gain control of uncertain infinite-dimensional systems,
*IEEE Transactions on Automatic Control*, volume 42, no. 1, pages 22-37, DOI:10.1109/9.553685. - Logemann H, Townley S. (1997) Adaptive integral control of time-delay systems,
*IEE Proceedings: Control Theory and Applications*, volume 144, no. 6, pages 531-536, DOI:10.1049/ip-cta:19971526. - Rebarber R, Townley S. (1997) Stabilization of distributed parameter systems by piecewise polynomial control,
*IEEE Transactions on Automatic Control*, volume 42, no. 9, pages 1254-1257, DOI:10.1109/9.623087.

### 1996

- Ruiz A, Owens DH, Townley S. (1996) Learning periodic signals with recurrent neural,
*IEE Conference Publication*, no. 427 /2, pages 1131-1136. - Logemann H, Townley S. (1996) Low gain control of uncertain distributed parameter systems: Part 1 & Part 2,
*IEE Colloquium (Digest)*, no. 139. - Townley S, Kamstra M. (1996) Integral control with saturating input,
*IEE Conference Publication*, no. 427 /2, pages 805-808, DOI:10.1049/cp:19960655. - Triantafillidis S, Leach JA, Owens DH, Townley S. (1996) Qualitative dynamics, root-loci and asymptotic structure of universal adaptive stabilizers,
*IMA Journal of Mathematical Control and Information*, volume 13, no. 3, pages 251-278, DOI:10.1093/imamci/13.3.251. - Townley S. (1996) Topological aspects of universal adaptive stabilization,
*SIAM Journal on Control and Optimization*, volume 34, no. 3, pages 1044-1070, DOI:10.1137/S0363012992231951. - Logemann H, Townley S. (1996) The effect of small delays in the feedback loop on the stability of neutral systems,
*Systems and Control Letters*, volume 27, no. 5, pages 267-274, DOI:10.1016/0167-6911(96)00002-3. - Emirsajlow Z, Pritchard AJ, Townley S. (1996) On structured perturbations for two classes of linear infinite-dimensional systems,
*Dynamics and Control*, volume 6, no. 3, pages 227-261, DOI:10.1007/BF02169488. - Ruiz A, Owens DH, Townley S. (1996) Existence of limit cycles in recurrent neural networks,
*IEEE International Symposium on Industrial Electronics*, volume 1, pages 104-108.

### 1995

- Leach JA, Triantafillidis S, Owens DH, Townley S. (1995) Dynamics of universal adaptive stabilization: computational and analytical studies,
*Control, theory and advanced technology*, volume 10, no. 4 pt 4, pages 1689-1716. - Townley S, Owens DH, Triantafillidis S, Leach JA. (1995) Local and limiting analysis of stable universal adaptive dynamics,
*Proceedings of the IEEE Conference on Decision and Control*, volume 3, pages 2334-2339. - Townley S. (1995) Simple adaptive stabilization of output feedback stabilizable distributed parameter systems,
*Dynamics and Control*, volume 5, no. 2, pages 107-123, DOI:10.1007/BF01973944. - Rebarber R, Townley S. (1995) Robustness and continuity of the spectrum for uncertain distributed parameter systems,
*Automatica*, volume 31, no. 11, pages 1533-1546, DOI:10.1016/0005-1098(95)00088-E. - Triantafillidis S, Leach JA, Owens DH, Townley S. (1995) Limit systems, limit gains and non-generic behaviours arising in adaptive stabilizing control,
*Dynamics and Stability of Systems*, volume 10, no. 3, pages 233-254, DOI:10.1080/02681119508806206. - Townley S. (1995) Topological aspects of universal adaptive stabilization,
*Proceedings of the IEEE Conference on Decision and Control*, volume 2, pages 1894-1899. - Leach JA, Triantafillidis S, Owens DH, Townley S. (1995) The dynamics of universal adaptive stabilization: Computational and analytical studies,
*CONTROL-THEORY AND ADVANCED TECHNOLOGY*, volume 10, no. 4, pages 1689-1716. [PDF] - Logemann H, Townley S. (1995) Adaptive low-gain sampled-data control of DPS,
*PROCEEDINGS OF THE 34TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4*, pages 2946-2947. [PDF]

### 1993

- RYAN EP, TOWNLEY S. (1993) NONLINEAR UNCERTAIN SYSTEMS AND ROBUSTNESS OPTIMIZATION,
*INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL*, volume 3, no. 3, pages 241-260, DOI:10.1002/rnc.4590030305. [PDF] - Ilchmann A, Townley S. (1993) Simple adaptive stabilization of high-gain stabilizable systems,
*Systems and Control Letters*, volume 20, no. 3, pages 189-198, DOI:10.1016/0167-6911(93)90060-J. - Hicks AC, Townley S. (1993) On exact solutions of differential equations arising in universal adaptive stabilization,
*Systems and Control Letters*, volume 20, no. 2, pages 117-129, DOI:10.1016/0167-6911(93)90024-Z. - TOWNLEY S. (1993) ROBUST STABILITY RADII FOR DISTRIBUTED-PARAMETER SYSTEMS - A SURVEY,
*ANALYSIS AND OPTIMIZATION OF SYSTEMS : STATE AND FREQUENCY DOMAIN APPROACHES FOR INFINITE-DIMENSIONAL SYSTEMS*, volume 185, pages 302-313. [PDF]

### 1992

- TOWNLEY S. (1992) GENERIC PROPERTIES OF UNIVERSAL ADAPTIVE STABILIZATION SCHEMES,
*PROCEEDINGS OF THE 31ST IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4*, pages 3630-3631. [PDF]

### 1991

- Townley S, Owens DH. (1991) A note on the problem of multivariable adaptive tracking,
*IMA Journal of Mathematical Control and Information*, volume 8, no. 4, pages 389-395, DOI:10.1093/imamci/8.4.389. - Pritchard AJ, Townley S. (1991) Robustness optimization for uncertain infinite-dimensional systems with unbounded inputs,
*IMA Journal of Mathematical Control and Information*, volume 8, no. 2, pages 121-133, DOI:10.1093/imamci/8.2.121. - Townley S, Ryan EP. (1991) On the supremally regulated complex stability radius as a real robustness measure,
*Systems and Control Letters*, volume 16, no. 4, pages 249-259, DOI:10.1016/0167-6911(91)90012-4.

### 1990

- Pritchard AJ, Townley S. (1990) ROBUSTNESS OPTIMIZATION FOR ABSTRACT, UNCERTAIN CONTROL SYSTEMS: UNBOUNDED INPUTS AND PERTURBATIONS,
*Control of Distributed Parameter Systems 1989*, Elsevier, 117-121, DOI:10.1016/b978-0-08-037036-1.50025-2. - TOWNLEY S. (1990) Book Reviews,
*IMA Journal of Mathematical Control and Information*, volume 7, no. 4, pages 396-397, DOI:10.1093/imamci/7.4.396. - PRITCHARD AJ, TOWNLEY S. (1990) REAL STABILITY RADII FOR INFINITE DIMENSIONAL SYSTEMS,
*ROBUST CONTROL OF LINEAR SYSTEMS AND NONLINEAR CONTROL*, volume 4, pages 635-646. [PDF] - Ryan EP, Townley S. (1990) Non-linear systems: Robustness optimization and universal adaptive stabilization,
*Proceedings of the IEEE Conference on Decision and Control*, volume 6, pages 3228-3229, DOI:10.1109/cdc.1990.203387. - HINRICHSEN D, PRITCHARD AJ, TOWNLEY SB. (1990) RICCATI EQUATION APPROACH TO MAXIMIZING THE COMPLEX STABILITY RADIUS BY STATE FEEDBACK,
*INTERNATIONAL JOURNAL OF CONTROL*, volume 52, no. 4, pages 769-794, DOI:10.1080/00207179008953567. [PDF] - Townley S. (1990) Stability radius optimization: A geometric approach,
*Systems and Control Letters*, volume 14, no. 3, pages 199-207, DOI:10.1016/0167-6911(90)90014-L.

### 1989

- Pritchard AJ, Townley S. (1989) Robustness Optimization for Abstract, Uncertain Control Systems: Unbounded Inputs and Perturbations,
*IFAC-PapersOnLine*, volume 22, no. 4, pages 117-121, DOI:10.1016/s1474-6670(17)53529-6. - Pritchard AJ, Townley S. (1989) Robustness of linear systems,
*Journal of Differential Equations*, volume 77, no. 2, pages 254-286, DOI:10.1016/0022-0396(89)90144-7.

### 1988

- Pritchard AJ, Townley S. (1988) Robust compensator design via structured stability radii,
*Systems and Control Letters*, volume 11, no. 1, pages 33-37, DOI:10.1016/0167-6911(88)90108-9.

### 1987

- Chapman MJ, Pritchard AJ, Townley SB. (1987) Modelling linear distributed parameter systems,
*Systems Science*, volume 13, no. 3-4, pages 37-50. - Pritchard AJ, Townley S. (1987) ROBUSTNESS OF INFINITE DIMENSIONAL SYSTEMS,
*IFAC Proceedings Series*, no. 3, pages 459-462. - PRITCHARD AJ, TOWNLEY S. (1987) A STABILITY RADIUS FOR INFINITE DIMENSIONAL SYSTEMS,
*LECTURE NOTES IN CONTROL AND INFORMATION SCIENCES*, volume 102, pages 272-291. [PDF]