Report/Guide

Matthews, C E; Esward, T J (2013) Simulation of complex, modern, computer-based measuring systems for evaluation of measurement uncertainty: case study in digital imaging and uncertainty analysis. NPL Report. MS 16

Esward, T J; Matthews, C E; Wright, L; Yang, X-S (2010) Sensitivity analysis, optimisation, and sampling methods applied to continuous models. NPL Report. MS 2

Esward, T J; Matthews, C E; Wright, L; Yang, X-S (2010) Sensitivity analysis, optimisation, and sampling methods applied to continuous models: three test problems. NPL Report. MS 3

Esward, T J; Knox, S; Wright, L (2010) Tools for Continuous Modelling Case Study 2: organic light-emitting diodes. NPL Report. MS 5

Collett, M; Adamson, D B; Esward, T J (2008) Investigations using the Wireless Sensor Network demonstrator testbed. NPL Report. TQE 3

Esward, T J; Wright, L (2007) Deriving uncertainties when using simulation in metrology. NPL Report. DEM-ES 017

Esward, T J; Wright, L (2007) Software Support for Metrology - Good Practice Guide No. 15 - Continuous modelling. NPL Report. DEM-ES 026

Esward, T J; McCormick, N J; Lawrence, K M; Stevens, M J (2007) Software Support for Metrology - Good Practice Guide No.17. Distributed computing for metrology applications. NPL Report. DEM-ES 006

Gilby, J*; Walton, J*; Esward, T J; Harris, P M; Wright, L (2006) Software Support for Metrology good practice guide No.13: data visualisation. NPL Report. DEM-ES 009

Esward, T J; Lees, K; Sayers, D*; Wright, L (2004) Testing continuous modelling software: three case studies. NPL Report. CMSC 42/04

Esward, T J; Johnson, E G; Wright, L (2004) Testing continuous modelling software. NPL Report. CMSC 41/04

Cox, M G; Esward, T J; Harris, P M; McCormick, N J; Ridler, N M; Salter, M J; Walton, J P R B* (2004) Visualization of uncertainty associated with classes of electrical measurements. NPL Report. CMSC 44/04

Esward, T J; Wright, L (2003) Guide to the use of finite element and finite difference software. NPL Report. CMSC 30/03

Esward, T J; Lord, G*; Wright, L (2003) Model validation in continuous modelling. NPL Report. CMSC 29/03

Gélat, P N; Esward, T J; Wright, P S (2003) New directions - digital signal processing: recommendations for the Software Support for Metrology programme 2004-2007. NPL Report. CMSC 17/03

Esward, T J; Forbes, A B; Mansfield, A J (2003) New directions - future directions in mathematics and scientific computing: recommendations for the Software Support for Metrology programme 2004-2007. NPL Report. CMSC 16/03

Esward, T J (2002) Finite element modelling of oil-operated piston-cylinder pressure balances: determining uncertainties in distortion coefficient predictions using the finite element method. NPL Report. CMAM 85

Esward, T J; Theobald, P D; Dowson, S P; Preston, R C (2002) An investigation into the establishment and assessment of a test facility for the calibration of acoustic emission sensors. NPL Report. CMAM 82

Esward, T J (1998) An assessment of medical ultrasonic field measurement methods: final technical report for EC contract no. MAT1-CT940064. NPL Report. CMAM 17

Article

Esward, T J (2016) Investigating dynamic measurement applications though modelling and simulation. tm - Technisches Messen, 83 (10). pp. 557-564.

Esward, T J; Wright, L (2015) Efficient updating of PDE models for metrology. Measurement, 79. pp. 267-275.

Matthews, C E; Pennecchi, F*; Eichstadt, S*; Malengo, A*; Esward, T J; Smith, I M; Elster, C*; Knott, A J; Arrhen, F*; Lakka, A* (2014) Mathematical modelling to support traceable dynamic calibration of pressure sensors. Metrologia, 51 (3). pp. 326-338.

Wright, L; Esward, T J (2013) Fit for purpose models for metrology: a model selection methodology. J. Phys.: Conf. Ser., 459. 012039

Collett, M; Esward, T J; Harris, P M; Matthews, C E; Smith, I M (2013) Simulating distributed measurement networks in which sensors may be faulty, noisy and interdependent: a software tool for sensor network design, data fusion and uncertainty evaluation. Measurement, 46 (8). pp. 2647-2660.

Esward, T J; Knox, S; Jones, H*; Brewer, P J; Murphy, C E; Wright, L; Williams, J (2011) A metrology perspective on the dark injection transient current method for charge mobility determination in organic semiconductors. J. Appl. Phys., 109 (9). 093707

Eichstädt, S*; Elster, C*; Esward, T J; Hessling, J P* (2010) Deconvolution filters for the analysis of dynamic measurement processes: a tutorial. Metrologia, 47 (5). pp. 522-533.

Collett, M A; Matthews, C E; Esward, T J; Whibberley, P B (2010) Measurement and simulation of clock errors from resource-constrained embedded systems. Meas. Sci. Technol., 21 (7). 075203

Clarkson, P; Esward, T J; Harris, P M; Smith, A A*; Smith, I M (2010) Software simulation of a lock-in amplifier with application to the evaluation of uncertainties in real measuring systems. Meas. Sci. Technol., 21 (4). 045106

Collett, M A; Cox, M G; Duta, M*; Esward, T J; Harris, P M; Henry, M P* (2008) The application of self-validation to wireless sensor networks. Meas. Sci. Technol., 19 (12). 125201

Collett, M A*; Cox, M G; Esward, T J; Harris, P M; Sousa, J A* (2007) Aggregating measurement data influenced by common effects. Metrologia, 44 (5). pp. 308-318.

Esward, T J; de Ginestous, A*; Harris, P M; Hill, I D*; Salim, S G R; Smith, I M; Wichmann, B A; Winkler, R; Woolliams, E R (2007) A Monte Carlo method for uncertainty evaluation implemented on a distribution computing system. Metrologia, 44 (5). pp. 319-326.

Nam, G H*; Cox, M G; Harris, P M; Robinson, S P; Hayman, G; Beamiss, G A; Esward, T J; Smith, I M (2007) A model for characterizing the frequency-dependent variation in sensitivity with temperature of underwater acoustic transducers from historical calibration data. Meas. Sci. Technol., 18. pp. 1553-1562.

Georgakopoulos, D; Williams, J M; Knott, A J; Esward, T J; Wright, P S (2006) Dynamic characterisation of the electronic instrumentation used in the calibration of fatigue testing machines. IEE Proc. Sci. Meas. Technol., 153 (6). pp. 256-259.

Theobald, P D; Esward, T J; Dowson, S P (2005) Acoustic emission transducers - development of a facility for traceable out-of-plane displacement calibrations. Ultrasonics, 43 (5). pp. 343-350.

Esward, T J; Preston, R C; Gélat, P N (2003) Piston-cylinder pressure balance design with a negligible distortion coefficient. Meas. Sci. Technol., 14 (6). pp. 796-806.

Beamiss, G A; Robinson, S P; Hayman, G; Esward, T J (2002) Determination of the variation in free-field hydrophone response with temperature and depth. Acta Acust. - Acustica, 88 (5). pp. 799-802.

Esward, T J; Persson, H*; Kollman, C*; Chinchurreta Segovia, F J*; Beissner, K*; Ludwig, G*; Ward, B*; Whittingham, T A*; Eisenberg, A*; Pessel, M*; Hekkenberg, R T*; Duck, F A*; Knuuttila, J* (2000) A european comparison of medical ultrasonic field measurements: interpreting IEC 61157. Acustica - Acta Acust., 86 (6). pp. 1000-1010.

Esward, T J; Robinson, S P (1999) Extending the frequency range of the NPL primary standard laser interferometer for hydrophone calibrations to 60MHz. IEEE Trans. Ultrason. Feroelectr. Freq. Control, 46 (3). pp. 737-744.

Preston, R C; Robinson, S P; Zeqiri, B; Esward, T J; Gelat, P N; Lee, N D (1999) Primary calibration of membrane hydrophones in the frequency range 0.5 MHz to 60 MHz. Metrologia, 36 (4). pp. 331-334.

Esward, T J; Bangash, M A (1998) Prediction of near-field behaviour of transducers: a comparison of the finite element, boundary element and angular plane wave spectrum methods and the consequences for measurements in the near field. Proc. Inst. Acoust., 20 (3). pp. 47-55.

Esward, T J; Bangash, M A (1998) Prediction of the near-field behaviour of transducers: a comparison of the finite element, boundary element and angular plane wave spectrum methods and the consequences for measurements in the near-field. Proc. Inst. Acoust., 20 (3). pp. 47-56.

Esward, T J; Bangash, M A (1998) Prediction of the near-field behaviour of transducers: a comparison of the finite element, boundary element and angular plane-wave spectrum methods. Proc. Inst. Acoust., 20 (3). pp. 47-55.

Conference or Workshop Item

Georgakopoulos, D; Williams, J M; Knott, A J; Esward, T J; Wright, P S (2005) Dynamic calibration of fatigue testing machines. In: BEMC 2005 - British Electromagnetic Measurements Conference, 14-17 November 2005, NPL, UK.

Esward, T J; Wright, L (2001) Finite element optimisation for problems in acoustics. In: National Measurement Conference (NMC) 2001, 6-8 November 2001, Harrogate, UK.

Esward, T J; Ablitt, J; Robinson, S P; Beamiss, G A (2000) Development of a primary standard for hydrophone calibrations in the frequency range from 20 Hz to 2kHz based on the principle of coupler reciprocity. In: Proceedings of the 5th European Conference on Underwater Acoustics, July 2000, Lyon, France.