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TLM representation of the hyperbolic heat conduction equation (2002)
Journal Article
Pulko, S. H., Wilkinson, A. J., & Saidane, A. (2002). TLM representation of the hyperbolic heat conduction equation. International journal of numerical modelling, 15(3), 303-315. https://doi.org/10.1002/jnm.445

Many heat transfer situations are adequately described by the parabolic thermal diffusion equation. However, in situations in which very rapid heating occurs or in slower heating regimes for particular materials, the hyperbolic heat conduction equati... Read More about TLM representation of the hyperbolic heat conduction equation.

POSSUM and P-POSSUM overpredict mortality for carotid endarterectomy (2002)
Journal Article
Kuhan, G., Abidia, A. F., Wijesinghe, L. D., Chetter, I. C., Johnson, B. F., Wilkinson, A. .., Renwick, P. M., & McCollum, P. T. (2002). POSSUM and P-POSSUM overpredict mortality for carotid endarterectomy. European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery, 23(3), 209-211. https://doi.org/10.1053/ejvs.2001.1557

Objectives: the aim was to test the predictive accuracy of POSSUM and P-POSSUM on patients undergoing CEA. Design: retrospective and prospective study. Materials: 499 CEAs performed by four vascular surgeons from a single unit from 1992-99. The media... Read More about POSSUM and P-POSSUM overpredict mortality for carotid endarterectomy.

An observer design for linear time-delay systems (2002)
Journal Article
Hou, M., Zítek, P., & Patton, R. J. (2002). An observer design for linear time-delay systems. IEEE transactions on automatic control, 47(1), 121-125. https://doi.org/10.1109/9.981730

An observer design is proposed for linear systems with time delay. The key of the design is to find a generalized coordinate change such that in the new coordinates all the time-delay terms are injected by the system's output. The existence of such a... Read More about An observer design for linear time-delay systems.

Risk modelling study for carotid endarterectomy (2001)
Journal Article
Kuhan, G., Gardiner, E. D., Abidia, A. F., Chetter, I. C., Renwick, P. M., Johnson, B. F., Wilkinson, A. R., & McCollum, P. T. (2001). Risk modelling study for carotid endarterectomy. British journal of surgery, 88(12), 1590-1594. https://doi.org/10.1046/j.0007-1323.2001.01938.x

Background: The aims of this study were to identify factors that influence the risk of stroke or death following carotid endarterectomy (CEA) and to develop a model to aid in comparative audit of vascular surgeons and units. Methods: A series of 839... Read More about Risk modelling study for carotid endarterectomy.

Reverse time modeling of thermal problems using the transmission line matrix approach (2001)
Journal Article
Badger, I., Pulko, S. H., & Wilkinson, A. J. (2001). Reverse time modeling of thermal problems using the transmission line matrix approach. Numerical Heat Transfer, Part B Fundamentals, 40(3), 249-264. https://doi.org/10.1080/104077901752379648

The possibility of using inverse scattering for reverse time modeling of thermal diffusion problems using the transmission line matrix is discussed. Consideration is given to network parameterization via a series of numerical experiments. A three-dim... Read More about Reverse time modeling of thermal problems using the transmission line matrix approach.

Risk modelling for carotid endarterectomy (2001)
Presentation / Conference Contribution
Abidia, A., Wilkinson, A., Johnson, B., Gardiner, E., Kuhan, G., McCollum, P., Renwick, P., & Chetter, I. Risk modelling for carotid endarterectomy

A test for behavioral equivalence (2000)
Journal Article
Hou, M., Pugh, A. C., & Hayton, G. E. (2000). A test for behavioral equivalence. IEEE transactions on automatic control, 45(11), 2177-2182. https://doi.org/10.1109/9.887674

External equivalence of behavioral representations is investigated within an impulsive-smooth framework. As an attendant problem, initial-value consistency is also considered. Explicit necessary and sufficient conditions are derived. Applying the ext... Read More about A test for behavioral equivalence.

Observer design based on triangular form generated by injective map (2000)
Journal Article
Hou, M., Busawon, K., & Saif, M. (2000). Observer design based on triangular form generated by injective map. IEEE transactions on automatic control, 45(7), 1350-1355. https://doi.org/10.1109/9.867046

A study is conducted which focuses on showing that for the multi-output case uniform observability is necessary but not sufficient for the existence of a coordinate change bringing a system a triangular form; providing a procedure to construct an inj... Read More about Observer design based on triangular form generated by injective map.

Stark shift in electroluminescence of individual InAs quantum dots (2000)
Journal Article
Itskevich, I., Rybchenko, S., Tartakovskii, I., Stoddart, S., Levin, A., Main, P., Eaves, L., Henini, M., & Parnell, S. (in press). Stark shift in electroluminescence of individual InAs quantum dots. Applied physics letters, 76(26), 3932-3934. https://doi.org/10.1063/1.126825

We have fabricated light-emitting-diode heterostructure devices, in which a layer of InAs self-assembled quantum dots is embedded, with an active area of submicron size. In the electroluminescence spectra of these devices, we observed isolated narrow... Read More about Stark shift in electroluminescence of individual InAs quantum dots.

General solution to systems in polynomial matrix form (2000)
Journal Article
Hou, M., Pugh, A. C., & Hayton, G. E. (2000). General solution to systems in polynomial matrix form. International journal of control, 73(9), 733-743. https://doi.org/10.1080/00207170050029241

Solvability and general solutions to dynamic systems in polynomial matrix descriptions are investigated. The polynomial matrix descriptions need not necessarily be regular. Consistency of initial Values and inputs are discussed. The characterization... Read More about General solution to systems in polynomial matrix form.

Actuation and transduction by giant magnetostrictive alloys (2000)
Journal Article
Jenner, A. G., Smith, R. J. E., Wilkinson, A. J., & Greenough, R. D. (2000). Actuation and transduction by giant magnetostrictive alloys. Mechatronics, 10(4-5), 457-466. https://doi.org/10.1016/S0957-4158%2899%2900065-3

Since the discovery and understanding of the magnetic properties of the rare earth elements, the transduction properties of magnetostrictive alloys has improved significantly over earlier nickel based alloys. Alongside the advances in permanent magne... Read More about Actuation and transduction by giant magnetostrictive alloys.

Electroluminescence from individual InAs self-assembled quantum dots (2000)
Journal Article
Itskevich, I., Stoddart, S., Rybchenko, S., Tartakovskii, I., Eaves, L., Parnell, S., Main, P., & Henini, M. (2000). Electroluminescence from individual InAs self-assembled quantum dots. Physica status solidi. A, Applied research, 178(1), 307-311. https://doi.org/10.1002/1521-396X%28200003%29178%3A1%3C307%3A%3AAID-PSSA307%3E3.0.CO%3B2-Y

Emission lines from individual InAs self-assembled quantum dots (SAQD) have been observed in electroluminescence spectra from small-area p-i-n light-emitting-diode heterostructure devices containing an embedded layer of SAQD. In the energy range whic... Read More about Electroluminescence from individual InAs self-assembled quantum dots.

The effect of stubs on the dynamics of TLM diffusion modeling networks (2000)
Journal Article
Gilbert, J., Wilkinson, A., & Pulko, S. (2000). The effect of stubs on the dynamics of TLM diffusion modeling networks. Numerical Heat Transfer, Part B Fundamentals, 37(2), 165-184. https://doi.org/10.1080/104077900275477

The dynamics of stub-loaded, diffusion-modeling transmission line matrix (TLM) nodes are investigated using the TLM-state space analogy. Analysis is performed for one-dimensional and three-dimensional nodes. Additional dynamics are identified and a s... Read More about The effect of stubs on the dynamics of TLM diffusion modeling networks.

Discretization effects in TLM diffusion models (2000)
Journal Article
Pulko, S., & Wilkinson, A. (2000). Discretization effects in TLM diffusion models. International journal of numerical modelling, 13(1), 59 - 74. https://doi.org/10.1002/%28SICI%291099-1204%28200001/02%2913%3A159%3A%3AAID-JNM382%3E3.3.CO%3B2-0

The standard methods for bringing a TLM diffusion model to convergence are necessary but tedious. However, much time and effort can be saved if the initial choices of elemental size and iteration timestep are appropriate. Here we consider the general... Read More about Discretization effects in TLM diffusion models.

Output feedback sliding mode FTC for a class of nonlinear inter-connected systems
Presentation / Conference Contribution
Patton, R. J., & Huang, Z. Output feedback sliding mode FTC for a class of nonlinear inter-connected systems. Paper presented at IFAC-PapersOnLine

This paper is concerned with the challenge of developing a fault-tolerant control (FTC) scheme for an inter-connected decentralised system in which the individual subsystems are linear but the inter-connections are non-linear functions of the subsyst... Read More about Output feedback sliding mode FTC for a class of nonlinear inter-connected systems.