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Banks, Robert and O'Leary, Richard L. and Hayward, Gordon (2017) Enhancing the bandwidth of piezoelectric composite transducers for air-coupled non-destructive evaluation. Ultrasonics, 75. 132–144. ISSN 0041-624X

Dobie, Gordon and Pierce, S. Gareth and Hayward, Gordon (2013) The feasibility of synthetic aperture guided wave imaging to a mobile sensor platform. NDT and E International, 58. pp. 10-17. ISSN 0963-8695

Jackson, Joseph and Summan, Rahul and Dobie, Gordon and Whiteley, Simon and Pierce, Stephen and Hayward, Gordon (2013) Time-of-flight measurement techniques for airborne ultrasonic ranging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 60 (2). 343 - 355. ISSN 0885-3010

Li, M. H. and Hayward, G. (2012) Ultrasound nondestructive evaluation (NDE) imaging with transducer arrays and adaptive processing. Sensors, 12 (1). pp. 42-54. ISSN 1424-8220

Dobie, Gordon and Summan, Rahul and Pierce, S. Gareth and Galbraith, Walter and Hayward, Gordon (2011) A noncontact ultrasonic platform for structural inspection. IEEE Sensors Journal, 11 (10). pp. 2458-2468. ISSN 1530-437X

Pierce, Stephen and Flockhart, Gordon and Mcguire, Michelle and Bennecer, Abdeldjalil and Hayward, Gordon and Thursby, Graham and Stewart, George and Culshaw, Brian (2011) Towards smart sonar transducers - polarimetric sensing for sonar array compensation. In: 8th International Workshop on Structural Health Monitoring, 2011-09-13 - 2011-09-15.

Dobie, Gordon and Spencer, Andrew and Burnham, Kenneth and Pierce, S. Gareth and Worden, Keith and Galbraith, Walter and Hayward, Gordon (2011) Simulation of ultrasonic lamb wave generation, propagation and detection for an air coupled robotic scanner. Ultrasonics, 51 (3). pp. 258-269. ISSN 0041-624X

Troge, Alexandre and O'Leary, Richard and Hayward, Gordon and Pethrick, Richard and Mulholland, Anthony (2010) Properties of photocured epoxy resin materials for application in piezoelectric ultrasonic transducer matching layers. Journal of the Acoustical Society of America, 128 (5). pp. 2704-2714. ISSN 0001-4966

Bennecer, Abdeldjalil and Mcguire, Michelle and Flockhart, Gordon and Pierce, Stephen and Hayward, Gordon and Culshaw, Brian (2010) Frequency response of underwater ultrasonic transducers in the near field using polarimetric polarization maintaining fiber sensors. Proceedings of SPIE the International Society for Optical Engineering, 7653. pp. 1-4. 76530S. ISSN 0277-786X

Ekevall, E. and Hayward, L. and Hayward, G. and Spencer, E. and MacBride, G. and Magill, J. and Bryce, A.C. and Stimpson, B.P. (2010) Embedding and sustaining engineering in the school curriculum. In: 3rd International Symposium for Engineering Education, 1900-01-01. (Unpublished)

Ekevall, E. and Hayward, E.L. and Hayward, G. and Magill, J. and Spencer, E. and MacBride, G. and Bryce, C. and Stimpson, B.P. (2010) Engineering - young people want to be informed. In: Engineering Education 2010: Inspiring the Next Generation of Engineers, 2010-07-01.

Whiteley, S M and Waters, D A and Hayward, G and Pierce, S G and Farr, I (2010) Wireless recording of the calls of Rousettus aegyptiacus and their reproduction using electrostatic transducers. Bioinspiration & Biomimetics, 5 (2). 026001. ISSN 1748-3182

Dziewierz, Jerzy and Gachagan, Anthony and O'Leary, Richard and Hayward, Gordon (2010) A methodology for the design of triangular-cut piezoelectric ceramic composites for application in 2D hexagonal-element ultrasonic arrays for NDE applications. In: International Workshop on Transducers and Transducer Materials, 2010-05-11, Penn State University.

Li, M. and Ho, Kwok Shun and Hayward, G. (2010) Accurate angle-of-arrival measurement using particle swarm optimization. Wireless Sensor Networks, 2 (5). pp. 358-364. ISSN 1945-3078

Pierce, Stephen and Dobie, Gordon and Summan, Rahul and Mackenzie, Liam and Hensman, James and Worden, Keith and Hayward, Gordon; Kundu, Tribikram, ed. (2010) Positioning challenges in reconfigurable semi-autonomous robotic NDE inspection. In: Health Monitoring of Structural and Biological Systems 2010. SPIE, USA. ISBN 9780819480651

MacBride, G. and Hayward, L. and Hayward, G. and Spencer, E. and Ekevall, E. and Magill, J. and Bryce, A.C. and Stimpson, Brian P. (2010) Engineering the future: Embedding engineering permanently across the school-university interface. IEEE Transactions on Education, 53 (1). pp. 120-127. ISSN 0018-9359

Dziewierz, J. and Ramadas, S.N. and Gachagan, A. and O'Leary, R.L. and Hayward, G. (2010) A 2D ultrasonic array design incorporating hexagonal-shaped elements for NDE applications. In: 2009 IEEE Ultrasonics Symposium, 2009-09-20 - 2009-09-23.

Ramadas, S.N. and O'Leary, R.L. and Gachagan, A. and Hayward, G. and Banks, R.A.; (2010) A wideband annular piezoelectric composite transducer configuration with a graded active layer profile. In: Proceedings of the 2009 IEEE International Ultrasonics Symposium (IUS). IEEE, ITA, pp. 2742-2745. ISBN 9781424443895

Ekevall, E. and Hayward, L. and Hayward, G. and MacBride, G. and Magill, J. and Spencer, E. (2009) Engineering - what's that? In: SEFI Annual Conference 2009: 'Attracting Young People to Engineering: Engineering is Fun', 2009-07-01. (Unpublished)

Friedrich, M. and Dobie, G.I.I. and Chan, C.C. and Pierce, S.G. and Galbraith, W. and Marshall, S. and Hayward, G. (2009) Miniature mobile sensor platforms for condition monitoring of structures. IEEE Sensors Journal, 9 (11). pp. 1439-1448. ISSN 1530-437X

Ramadas, Sivaram Nishal and O'Leary, Richard and Mulholland, Anthony and Hayward, Gordon and Mackintosh, Allan and Troge, Alexandre and Pethrick, Richard; (2009) Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers. In: 2009 IEEE International Ultrasonics Symposium. IEEE, ITA, pp. 1695-1698. ISBN 9781424443895

Li, M. and Ho, E.K. and Hayward, G. (2009) Beamspace transformation for data reduction using genetic algorithms. In: 2009 IEEE Ultrasonics Symposium, 2009-09-20 - 2009-09-23.

Dziewierz, Jerzy and Ramadas, Sivaram Nishal and Gachagan, Anthony and O'Leary, Richard and Hayward, Gordon (2009) Hexagonal array structure for 2D NDE applications. In: International Workshop on Transducers and Transducer Materials, 2009-05-12, Penn State University.

O'Leary, Richard and Ramadas, Sivaram Nishal and Mulholland, Anthony and Hayward, Gordon and Troge, Alexandre and Pethrick, Richard (2009) Multiphase passive materials for efficient and wideband transduction. In: International Workshop on Transducers and Transducer Materials, 2009-05-12, Penn State University.

McGuire, M. and Flockhart, G.M.H. and Pierce, S.G. and Hayward, G. (2009) Monitoring of sonar transducers and arrays using optical sensors. In: U.S. Navy Workshop on Acoustic Transduction Materials and Devices, 2009-05-01. (Unpublished)

Whiteley, S. and Pierce, S.G. and Hayward, G. (2009) Reproducing the calls of bats using inverse filtering and broadband transducers. In: US Navy Workshop on Acoustic Transduction Materials and Devices, 2009-05-01. (Unpublished)

Carson, G. and Mulholland, A.J. and Nordon, A. and Gachagan, A. and Hayward, G. (2009) Theoretical analysis of ultrasonic vibration spectra from multiple particle-plate impacts. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 56 (5). pp. 1034-1041. ISSN 0885-3010

Whiteley, S. and Waters, D.A. and Farr, I. and Pierce, S.G. and Hayward, G. (2009) Wireless monitoring of in-flight bat calls and echoes from the echolocating fruit bat rousettus aegyptiacus. In: Fifth International Conference on Bio-Acoustics, 2009-03-31 - 2009-04-02. (Unpublished)

McGuire, M. and Hayward, G. and Pierce, S.G. and Flockhart, G.M.H. (2009) Instrumented transducer for study of the bat echolocation process. In: Fifth International Conference on Bio-Acoustics, 2009-03-31 - 2009-04-02. (Unpublished)

Dobie, G.I.I. and Spencer, A. and Pierce, S.G. and Galbraith, W. and Worden, K. and Hayward, G.; (2009) Simulation and implementation of ultrasonic remote sensing agents for reconfigurable NDE scanning. In: Review of Progess in Quantitative Nondestructive Evaluation. American Institute of Physics, pp. 990-997. ISBN 978-0-7354-0629-2

Carson, G. and Mulholland, A.J. and Nordon, A. and Tramontana, M. and Gachagan, A. and Hayward, G. (2009) Estimating particle concentration using passive ultrasonic measurement of impact vibrations. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 56 (2). pp. 345-352. ISSN 0885-3010

Flockhart, G. M.H. and Mcguire, M. and Pierce, S.G. and Thursby, G. and Stewart, G. and Hayward, G. and Culshaw, B. (2009) Direct monitoring of underwater ultrasonic transducers in the near field using fibre bragg grating sensors. Proceedings of SPIE: The International Society for Optical Engineering, 7503. p. 750331.

Orr, Leigh-Ann and Mulholland, Anthony J. and O'Leary, Richard L. and Hayward, Gordon (2008) Harmonic analysis of lossy piezoelectric composite transducers using the plane wave expansion method. Ultrasonics, 48 (8). pp. 652-663. ISSN 0041-624X

Orr, L. and Mulholland, A.J. and O'Leary, R.L. and Hayward, G. (2008) Analysis of ultrasonic transducers with fractal architecture. Fractals, 16 (4). pp. 333-349. ISSN 0218-348X

Mulholland, A. and Ramadas, S.N. and O'Leary, R.L. and Parr, A.C.S. and Hayward, G. and Troge, Alexandre and Pethrick, R.A. (2008) Enhancing the performance of piezoelectric ultrasound transducers by the use of multiple matching layers. IMA Journal of Applied Mathematics, 73 (6). pp. 936-949. ISSN 1464-3634

Ekevall, Elizabeth and Hayward, L. and Hayward, G. and MacBride, G. and Spencer, E. (2008) Engineering in the curriculum: connecting science, technology and mathematics. In: Scottish Educational Research Association Annual Conference 2008, 2008-11-27 - 2008-11-29. (Unpublished)

Carson, G. and Mulholland, A.J. and Nordon, A. and Tramontana, M. and Gachagan, A. and Hayward, G. (2008) Particle sizing using passive ultrasonic measurement of particle-wall impact vibrations. Journal of Sound and Vibration, 317 (1-2). pp. 142-157. ISSN 0022-460X

Hayward, G. (2008) Biologically inspired ultrasonics - the potential for future NDE systems. In: British Institute of Non-destructive Testing Plenary session, 2008-09-16 - 2008-09-18. (Unpublished)

Hayward, L. and Ekevall, Elizabeth and Hayward, G. and MacBride, G. and Spencer, E. (2008) Engineering education: sustaining transformational change? In: British Educational Research Association (BERA) Annual Conference, 2008-09-03 - 2008-09-06. (Unpublished)

MacBride, G. and Chapman, R. and Ekevall, Elizabeth and Hayward, L. and Hayward, G. and Spencer, E. (2008) Engineering the future: changing attitudes,changing schools? In: British Educational Research Association (BERA) Annual Conference, 2008-09-03 - 2008-09-06. (Unpublished)

MacKenzie, Liam David and Pierce, S.G. and Hayward, G.; (2008) Robotic inspection system for non destructive evaluation (NDE) of pipes. In: Proceedings of the 35th Annual Review of Progress in Quantitative Nondestructive Evaluation. American Institute of Physics, pp. 1687-1694. ISBN 978-0-7354-0629-2

Ekevall, Elizabeth and Cluckie, J. and Hayward, L. and Hayward, G. and MacBride, G. and Spencer, E. (2008) Teaching science and technology through engineering. In: British Education Research Association Conference (BERA) 2008, 2008-09-03 - 2008-09-06. (Unpublished)

Spencer, E. and Ekevall, Elizabeth and Hayward, L. and Hayward, G. and MacBride, G. (2008) Where should engineering be in the school curriculum? In: British Educational Research Association (BERA) Annual Conference, 2008-09-03 - 2008-09-06. (Unpublished)

MacBride, G. and Ekevall, E. and Hayward, L. and Hayward, G. and Spencer, E. and Stimpson, B.P. (2008) Engineering the future: a sustainable concept? In: EE2008 International Conference on Innovation, Good Practice and Research in Engineering Education, 2008-07-01. (Unpublished)

MacBride, G. and Ekevall, Elizabeth and Hayward, L. and Hayward, G. and Spencer, E. and Stimpson, Brian P. (2008) Engineering the future: practitioners, researchers and policy makers working across sectors. In: EE2008 – the International Conference on Innovation, Good Practice and Research in Engineering Education conference, 2008-07-14 - 2008-07-18. (Unpublished)

Friedrich, M. and Pierce, S.G. and Galbraith, W. and Hayward, G. (2008) Data fusion in automated robotic inspection systems. Insight: The Journal of the British Institute of Non-Destructive Testing. ISSN 1354-2575

Mckenna, James P. and McLean, Neil I. and Gachagan, A. and McArthur, S.D.J. and Hayward, G.; (2008) An advanced flaw-response modelling approach for inspection qualification using a multi-agent system software platform. In: Review of Progress in Quantitative Nondestructive Evaluation: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation. AIP Conference Proceedings. American Institute of Physics, pp. 1598-1605. ISBN 978-0-7354-0494-6

McLean, Neil I. and Mckenna, James P. and Gachagan, A. and McArthur, S.D.J. and Hayward, G.; (2008) A prototype demonstrator for an inspection qualification multi-agent system (IQMAS). In: Review of Progress in Quantitative Nondestructive Evaluation: 34th Annual Review of Progress in Quantitative Nondestructive Evaluation. AIP Conference Proceedings. American Institute of Physics, pp. 1606-1613. ISBN 978-0-7354-0494-6

Walker, Alan J. and Mulholland, A.J. and Campbell, Ewan and Hayward, G. (2008) A theoretical model of a new electrostatic transducer incorporating fluidic amplification. In: 2008 IEEE International Ultrasonics Symposium, 1900-01-01.

Orr, L. and Mulholland, A.J. and O'Leary, R.L. and Parr, A.C.S. and Pethrick, R.A. and Hayward, G. (2007) Theoretical modelling of frequency dependent elastic loss in composite piezoelectric transducers. Ultrasonics, 47 (1). pp. 130-137. ISSN 0041-624X

Mulholland, A. and Ramadas, S.N. and O'Leary, R.L. and Parr, A.C.S. and Troge, A. and Hayward, G. and Pethrick, R.A. (2007) A theoretical analysis of a piezoelectric ultrasound device with an active matching layer. Ultrasonics, 47 (1). pp. 102-110. ISSN 0041-624X

Dobie, G. and Galbraith, W. and Friedrich, M. and Pierce, S.G. and Hayward, G.; (2007) Robotic based reconfigurable Lamb wave scanner for non-destructive evaluation. In: IEEE Ultrasonics Symposium, 2007. IEEE, USA, pp. 1213-1216. ISBN 978-1-4244-1383-6

O'Leary, R.L. and Hayward, G. and Murray, V. (2007) Finite element technique for the assessment of 3-1 and 'super 1-3' connectivity piezoelectric composite transducers. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 54 (10). pp. 2024-2035. ISSN 0885-3010

Ramadas, S.N. and Hayward, G. and O'Leary, R.L. and McCunnie, T. and Mulholland, A. J. and Troge, A. and Pethrick, R.A. and Robertson, D. and Murray, V. (2007) A three-port acoustic lattice model for piezoelectric transducers containing opposing zones of polarization. In: 2007 IEEE International Ultrasonics Symposium, 2007-10-28 - 2007-10-31.

O'Leary, Richard and Harvey, G. and Gachagan, Anthony and Hayward, Gordon (2007) An insight into the behaviour of periodic piezoelectric composite array transducers incorporating contemporary constituent materials. In: British Institute Non-destructive Testing, 2007-09-10, SECC.

Gachagan, A. and Mulholland, A. J. and Hayward, G. and Tramontana, M. and Nordon, A. and Carson, G.; (2007) P1H-2 particle sizing in the process industry using Hertz-Zener impact theory and acoustic emission spectra. In: IEEE Ultrasonics Symposium, 2006. IEEE, CAN, pp. 1406-1409. ISBN 1424402018

Orr, L. and Mulholland, A.J. and O'Leary, R.L. and Hayward, G. (2007) A theoretical investigation of 2-2 composite transducers with high shear attenuation in the passive phase. In: GDR 2501/CNRS ST21: Étude de la propagation ultrasonore en milieux non homogènes en vue du contrôle non-destructif, 2007-03-01. (Unpublished)

Tramontana, M. and Gachagan, A. and Hayward, G. and Nordon, A. and Littlejohn, D. (2007) 4I-3 ultrasonic monitoring of heterogeneous chemical reactions. In: UNSPECIFIED.

Friedrich, M. and Galbraith, W. and Hayward, G.; (2007) Autonomous mobile robots for ultrasonic NDE. In: 2006 IEEE Ultrasonics symposium proceedings. Ultrasonics Symposium . IEEE, CAN, pp. 902-905. ISBN 9781424402014

Campbell, E.F. and Davis, L.A. and Hayward, G. and Hutchins, D.A. and Noble, R. (2007) Cross-coupling in sealed cMUT arrays for immersion applications. In: UNSPECIFIED.

Friedrich, M. and Pierce, S.G. and Galbraith, W. and Hayward, G. (2007) Data fusion in automated inspection systems. In: BINDT Annual Conference NDT 2007, 2007-09-18 - 2007-09-19.

Devaud, F.H. and Hayward, G. and Soraghan, J.J. (2007) Evaluation of a bio-inspired range finding algorithm (BIRA). In: IEEE Ultrasonics Symposium 2006, 2006-10-02 - 2006-10-06.

O'Leary, R.L. and Parr, A.C.S. and Hayward, G. and Troge, A. and Pethrick, R.A. (2007) Experimental assessment of periodic piezoelectric composite arrays incorporating an anisotropic passive phase. In: IEEE Ultrasonics Symposium 2006, 2006-10-02 - 2006-10-06.

Mckenna, J.P. and McLean, N.I. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2007) Integrating flaw-response modelling tools for inspection qualification into a multi-agent system. In: 46th Annual British Conference on Non-Destructive Testing, 2007-09-18 - 2007-09-20.

McLean, NI and McKenna, James Paul and Gachagan, Anthony and McArthur, S. D. J. and Hayward, Gordon; Thompson, D.O. and Chimenti, D.E., eds. (2007) The design of a multi-agent nde inspection qualification system. In: Review of Progress in Quantitative Nondestructive Evaluation. AIP Conference Proceedings, 26A . AIP Conference Proceedings, USA, pp. 1699-1706. ISBN 9780735403994

Campbell, Ewan Fraser and Galbraith, Walter and Hayward, Gordon; (2007) A new electrostatic transducer incorporating fluidic amplification. In: 2006 IEEE Ultrasonics Symposium. Ultrasonics symposium . IEEE, New York, pp. 1445-1448. ISBN 1424402018

McLean, N.I. and Mckenna, J.P. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2007) A prototype inspection qualification multi-agent system (IQMAS). In: 46th Annual British Conference on Non-Destructive Testing, 2007-09-18 - 2007-09-20.

Benny, C.G. and Gachagan, A. and Hayward, G. and Nordon, A. and Littlejohn, D. (2007) A wideband ultrasonic test system for characterisation of particulate systems in the linear and non-linear regimes. In: International Congress on Ultrasonics, 2007-04-09 - 2007-04-13.

Orr, L. and Mulholland, A.J. and O'Leary, R.L. and Hayward, G. (2006) Incorporation of viscoelastic loss into the plane wave expansion approach to modelling composite transducers. In: 2000 IEEE International Ultrasonics Symposium, 2000-10-22 - 2000-10-25, Caribe Hilton.

O'Leary, Richard and Troge, Alexandre and Parr, Agnes and Pethrick, Richard and Hayward, Gordon (2006) Limiting crosstalk in piezoelectric composite arrays via considered design of the passive phase. In: International Congress on Ultrasonics, 2007-04-09 - 2007-04-13.

Ramadas, S.N. and Hayward, G. (2006) Knowledge based approach for design optimization of ultrasonic transducers and arrays. In: 2005 IEEE International Ultrasonics Symosium, 2005-09-18 - 2005-09-21.

O'Leary, R.L. and Parr, A.C.S. and Troge, A. and Pethrick, R.A. and Hayward, G.; (2006) Performance of periodic piezoelectric composite arrays incorporating a passive phase exhibiting anisotropic properties. In: IEEE Ultrasonics Symposium, 2005. IEEE, NLD, pp. 1073-1076. ISBN 0780393821

Robertson, D.C. and Hayward, G. and Gachagan, A. and Murray, V. (2006) Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applications. Insight: The Journal of the British Institute of Non-Destructive Testing, 48 (2). pp. 97-99. ISSN 1354-2575

Hayward, G. and Hyslop, J. (2006) Determination of lamb wave dispersion data in lossy anisotropic plates using time domain finite element analysis - Part 1 - theory and experimental verification. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 53 (2). pp. 443-448. ISSN 0885-3010

Hayward, G. and Hyslop, J. (2006) Determination of lamb wave dispersion data in lossy anisotropic plates using time domain finite element analysis. part II : application to 2-2 and 1-3 piezoelectric composite transducer arrays. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 53 (2). pp. 449-455. ISSN 0885-3010

Robertson, D.C. and Hayward, G. and Gachagan, A. (2006) Comparison of the frequency and physical nature of the lowest order parasitic mode in single crystal and ceramic 2-2 and 1-3 piezoelectric composite transducers. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 53 (8). pp. 1503-1512. ISSN 0885-3010

Nordon, A. and Carella, Y. and Gachagan, A. and Littlejohn, D. and Hayward, G. (2006) Factors affecting broadband acoustic emission measurements of a hetrogeneous reaction. Analyst, 131 (2). pp. 323-330. ISSN 0003-2654

Carson, G. and Mulholland, A.J. and Tramontana, M. and Nordon, A. and Hayward, G. (2006) Particle sizing in the process industry using Hertz-Zener impact theory and acoustic emission spectra. In: IEEE International Ultrasonics Symposium, 1900-01-01.

Friedrich, M. and Gatzoulis, L. and Hayward, G. and Galbraith, W. (2006) Small inspection vehicles for non-destructive testing applications. In: Climbing and Walking Robots 2006, 1900-01-01.

Estanbouli, Y. and Hayward, G. and Ramedas, N. and Barbenel, J.C. (2006) A block diagram model of the thickness mode piezoelectric transducer containing dual oppositely polarised piezoelectric zones. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 53 (5). pp. 1028-1036. ISSN 0885-3010

Mckenna, J.P. and McLean, N.I. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2006) The design of a multi-agent system for flaw-response modelling. In: 45th Annual British Conference on Non-Destructive Testing, 2006-09-12 - 2006-09-14.

McLean, N.I. and Mckenna, J.P. and Gachagan, A. and McArthur, S.D.J. and Hayward, G. (2006) A multi agent system for inspection qualification. In: 45th Annual British Conference on Non-Destructive Testing, 2006-09-12 - 2006-09-14.

Parr, Agnes and Troge, Alexandre and O'Leary, Richard and Campbell, Ewan Fraser and Pethrick, Richard and Hayward, Gordon (2005) Enhancing the imaging performance of periodic piezoelectric composite arrays. In: bindt2005 British Institute of Non-destructive Evaluation, 2005-09-13.

O'Leary, R.L. and Hayward, G. and McCunnie, T.F. and Kijowski, M. (2005) 3-3 connectivity multilayered piezoelectric composites. In: 2004 IEEE Ultrasonics Symposium, 2004-08-23 - 2004-08-27.

O'Leary, Richard and Parr, Agnes and Hayward, Gordon (2005) Development of super 1-3 connectivity piezoelectric composite devices for the 20-100kHz frequency band. In: ONR Workshop on Acoustic Transduction Materials and Devices, 2005-05-10, Penn State University.

O'Leary, Richard and Parr, Agnes and TROGE, Alexandre and Pethrick, Richard and Hayward, Gordon (2005) Improving the performance of periodic piezoelectric composite arrays through synthesis of an anisotropic passive phase. In: ONR Workshop on Acoustic Transduction Materials and Devices, 2005-05-10, Penn State University.

Parr, A.C.S. and O'Leary, R.L. and Hayward, G. (2005) Improving the thermal stability of 1-3 piezoelectric composite transducers. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 52 (4). pp. 550-563. ISSN 0885-3010

Benny, C.G. and Steel, K. and McNab, A. and Hayward, G. (2005) A wireless sensor network of permanently installed structural integrity monitors. In: AIP Conference Proceedings, 2005-04-09 - 2005-04-09.

Hayward, G. and McNab, A. (2005) Introduction to the special issue on ultrasonic transducers for high temperature applications. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 52 (4). pp. 516-517. ISSN 0885-3010

Nordon, A. and Waddell, R. and Bellamy, L.J. and Gachagan, A. and Littlejohn, D. and Hayward, G. (2005) Monitoring of a heterogeneous reaction by acoustic emission. Analyst, 129 (5). pp. 463-467. ISSN 0003-2654

Gachagan, A. and Hayward, G. and Banks, R.A. (2005) A flexible piezoelectric transducer design for efficient generation and reception of ultrasonic lamb waves. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 52 (7). pp. 1175-1182. ISSN 0885-3010

Benny, C.G. and Steel, K. and McNab, A. and Hayward, G. (2005) A wireless ultrasonic NDT sensor system. In: UNSPECIFIED.

Kelly, S.P. and Hayward, G. and Alvarez-Arenas, T.E.G. (2004) Characterisation and assessment of an integrated matching layer for air coupled ultrasonic applications. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 51 (10). pp. 1314-1323. ISSN 0885-3010

McNab, A. and Benny, C.G. and Steel, K. and Hayward, G. (2004) A wireless ultrasonic sensor network for the in-situ NDE of structures. In: NDT2004, 2004-09-01.

Puccio, J.J. and Gatzoulis, L. and O'Leary, R.L. and Hayward, G. (2004) Prediction method for the fundamental radial mode of multi-mode motors. In: 2004 IEEE Ultrasonics Symposium, 2004-08-23 - 2004-08-27.

Estanbouli, Y. and Hayward, G. and Ramadas, S.N. and Barbenel, J.C. (2004) A linear systems model of the thickness mode piezoelectric transducer containing dual piezoelectric zones. 2004 IEEE Ultrasonics Symposium . IEEE. ISBN 0-7803-8412-1

Robertson, D. and Hayward, G. and Gachagan, A. and Hyslop, J. and Murray, V. (2004) A new low frequency piezoelectric composite transducer. In: 2004 IEEE Ultrasonics Symposium, 2004-08-23 - 2004-08-27.

Devaud, F. and Hayward, G. and Soraghan, J.J. (2004) The use of chirp overlapping properties for improved target resolution in an ultrasonic ranging system. In: 2004 IEEE Ultrasonics Symposium, 2004-08-23 - 2004-08-27.

O'Leary, R.L. and Parr, A.C.S. and Hayward, G.; (2004) Multilayered piezoelectric composite transducers. In: 2003 IEEE Symposium on Ultrasonics. IEEE, Piscataway, pp. 1306-1309.

Robertson, D.C. and Hayward, G. and Gachagan, A. and Reynolds, P. (2004) Minimisation of mechanical cross talk in periodic piezoelectric composite arrays. Insight: The Journal of the British Institute of Non-Destructive Testing, 46 (11). pp. 658-661. ISSN 1354-2575

Entwhistle, N.J. and Hamilton, A. and Kelly, R.G. and Nisbett, J.B. and Chapman, R. and Hayward, G. and Gachagan, A. (2004) Teaching and learning analogue electronics in undergraduate courses : preliminary findings from the ETL project. International Journal of Electrical Engineering Education, 42 (1). pp. 21-34. ISSN 0020-7209

Parr, A.C.S. and O'Leary, R.L. and Hayward, G. and Smillie, G.; Yuhas, D.E. and Schneider, S.C., eds. (2003) Improving the thermal stability of 1-3 piezoelectric composite transducers manufactured using thermally conductive polymeric fillers. In: 2003 IEEE Ultrasonics Symposium Proceedings. IEEE, USA, pp. 362-365. ISBN 0780379225

O'Leary, R.L. and Parr, A.C.S. and Hayward, G. (2003) Multi-layered piezoelectric composite transducers. In: IEEE Symposium on Ultrasonics 2003, 2003-10-05 - 2003-10-08.

Reynolds, P. and Hyslop, J.E. and Hayward, G. (2003) Analysis of spurious resonances in single and multi-element piezocomposite ultrasonic transducers. In: IEEE International Ultrasonics Symposium 2003, 2003-10-05 - 2003-10-08.

Robertson, D.C. and Hayward, G. and Gachagan, A. and Hyslop, J. and Reynolds, P. (2003) Comparison of mechanical cross talk in single crystal and ceramic periodic piezoelectric composite arrays. In: IEEE International Ultrasonics Symposium 2003, 2003-10-05 - 2003-10-08.

Farlow, R. and Galbraith, W. and Puccio, J.J. and Hayward, G. (2003) Micromachined components for ultrasonic transducers and scanners. In: IEEE International Ultrasonics Symposium 2003, 2003-10-05 - 2003-10-08.

Estanbouli, Y. and Hayward, G. and Barbenel, J.C. (2003) A study of inversion layer transducers. 2003 IEEE Symposium on Ultrasonics . IEEE. ISBN 0-7803-7922-5

Hayward, G. and Benny, C.G. and Gachagan, A. and Farlow, R. and Hailu, B. and McNab, A. and Girma, Demessie (2003) Embedded ultrasonic transducer design and wireless communication for intelligent monitoring of structures. In: 29th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2002-07-14 - 2002-07-19.

Gachagan, A. and Hailu, B. and McNab, A. and Lang, W. and Hendry, J. and Hayward, G. and Banks, W. (2003) Impact on the mechanical integrity of carbon fibre reinforced composite plates incorporating embedded piezoceramic transducers. In: 30th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2003-07-27 - 2003-08-01.

Benny, C.G. and Steel, K. and McNab, A. and Hayward, G. (2003) A cellular system for wireless structural integrity monitoring. In: 30th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2003-07-27 - 2003-08-01.

O'Leary, Richard and Hayward, Gordon (2003) Finite element analysis of multilayered piezoelectric composite transducers. In: ONR Workshop on Acoustic Transduction Materials and Devices, 2003-05-06, Penn State University.

Parr, Agnes and O'Leary, Richard and Hayward, Gordon and Smith, Paul (2003) A study of the performance of 1-3 piezoelectric composite transducers manufactured using thermally conductive polymeric filler materials. In: ONR Workshop on Acoustic Transduction Materials and Devices, 2003-05-06, Penn State University.

Parr, A.C.S. and O'Leary, R.L. and Hayward, G. and Smillie, G. and Benny, C.G. and Ewing, H.C. and MacKintosh, A.R.; (2002) Investigating the thermal stability of 1-3 piezoelectric composite transducers by varying the thermal conductivity and glass transition temperature of the polymeric filler material. In: 2002 IEEE Ultrasonics Symposium Proceedings. Ultrasonics Symposium . IEEE, DEU, pp. 1173-1176. ISBN 0780375823

O'Leary, R.L. and Hayward, G. (2002) A theoretical and experimental investigation into multilayered piezoelectric composite transducers. In: IEEE International Ultrasonic Symposium, 2002-10-08 - 2002-10-11.

Robertson, D.C. and Hayward, G. and Gachagan, A. (2002) Lamb wave suppression in periodic 1-3 piezoelectric composite transducers. In: IEEE International Ultrasonic Symposium, 2002-10-08 - 2002-10-11.

Estanbouli, Y. and Hayward, G. and Barbenel, J.C. (2002) A theoretical investigation of ultrasonic transducer design for measurement of skin. 2002 IEEE Ultrasonics Symposium . IEEE, Munich. ISBN 0-7803-7582-3

Parr, A. C S and O'Leary, R. L. and Hayward, G. and Smillie, G. and Rice, A. and Smith, P. T.; (2002) Experimental and theoretical evaluation of the thermal behaviour of 1-3 piezoelectric composite transducers. In: 2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium. IEEE, Piscataway, pp. 1041-1044. ISBN 0780363655

Gachagan, A. and Kelly, S. and Altman, M. and Grauvogl, E. and Hayward, G. and Banks, Robert and Mccunnie, Thomas and Skillen, David (2002) Development of a manual air-coupled ultrasonic inspection instrument for use on aeronautical structures under in-service conditions. In: 29th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2002-07-14 - 2002-07-19.

Farlow, R. and Hayward, G. (2001) The minimum signal force detectable in air with a piezoelectric plate transducer. Proceedings A: Mathematical, Physical and Engineering Sciences, 457 (2015). pp. 2741-2755. ISSN 1471-2962

Farlow, R. and Galbraith, W. and Kelly, S. and Hayward, G. (2001) Micromachined unimorphs and bimorphs. In: IEEE International Ultrasonic Symposium, 2001-10-07 - 2001-10-10.

Kelly, S. and Hayward, G. and Gomez, T.E. (2001) An air-coupled ultrasonic matching layer employing half wavelength cavity resonance. In: IEEE International Ultrasonic Symposium, 2001-10-07 - 2001-10-10.

Hailu, B. and Hayward, G. and McNab, A. and Gachagan, A. and Farlow, R. (2001) The structural integrity of composite plates with embedded piezoelectric transducers for smart structural monitoring. In: NDT2001, 2001-09-01.

Hailu, B. and Hayward, G. and McNab, A. and Gachagan, A. and Farlow, R. (2001) An evaluation of different piezoelectric materials for smart structural monitoring applications : the issue of structural integrity in the host structure and mechanical compatibility of embedded transducers. In: 28th Annual Conference on Quantitative Nondestructive Evaluation, 2001-07-29 - 2001-08-03.

Atkinson, D.C. and Hayward, G. (2001) Active fibre waveguide sensor for embedded structural condition monitoring. IEE Proceedings Science Measurement and Technology, 148 (4). pp. 158-166. ISSN 1350-2344

Atkinson, D.C. and Hayward, G. (2001) The generation and detection of logitudinal guided waves in thin fibres using a conical transformer. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 48 (4). pp. 1046-1053. ISSN 0885-3010

Farlow, R. and Galbraith, W. and Knowles, M. and Hayward, G. (2001) Micromachining of a piezocomposite transducer using a copper vapour laser. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 48 (3). pp. 639-640. ISSN 0885-3010

Hayward, G. and Hailu, B. and Farlow, R. and Gachagan, A. and McNab, A. (2001) The design of embedded transducers for structural health monitoring applications. Proceedings of SPIE: The International Society for Optical Engineering, 4327 (312). pp. 312-323. ISSN 1996-756X

Gomez Alvarez-Arenas, TE and Mulholland, A.J. and Hayward, G. and Gomatam, J. (2000) Wave propagation in 0-3/3-3 connectivity composites with complex microstructure. Ultrasonics, 38 (9). pp. 897-907. ISSN 0041-624X

Hayward, G. and McNab, A. and Gachagan, A. and Farlow, R. and Hailu, B. and Atkinson, D.C. and Girma, D. and Smith, D.G. and Whitely, S. (2000) Embedded ultrasonic sensors for monitoring structural integrity. In: 27th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2000-07-16 - 2000-07-20.

Hailu, B. and Hayward, Gordon and Gachagan, Anthony and McNab, Alistair and Farlow, Roger; Schneider, S.C. and Levy, M. and McAvoy, B.R., eds. (2000) Comparison of different piezoelectric materials for the design of embedded transducers for structural health monitoring applications. In: 2000 IEEE Ultrasonics Symposium Proceedings. IEEE, PRI, pp. 1009-1012. ISBN 0780363655

O'Leary, Richard L. and Hayward, Gordon (1999) Investigation into the effects of modification of the passive phase for improved manufacture of 1-3 connectivity piezocomposite transducers. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 46 (3). pp. 511-516. ISSN 0885-3010

Hayward, Gordon; Draper, S. W. and Dunlop, M. D. and Ruthven, I. and Rijsbergen, C. J. van, eds. (1999) Proceedings of Mira 99 : evaluating interactive information retrieval. In: Mira Conference, 1999-04-14 - 1999-04-16.

Gachagan, Anthony and Hayward, Gordon and McNab, Alistair and Reynolds, P. and Pierce, Stephen and Philp, WR and Culshaw, Brian (1999) Generation and reception of ultrasonic guided waves in composite plates using comfortable piezoelectric transmitters and optical-fiber detectors. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 46 (1). pp. 72-81. ISSN 0885-3010

O'Leary, Richard and Hayward, Gordon and Cochrane, Alexander (1999) Modification of the passive phase for frequency agility within 1-3 piezocomposite transducers. In: 1999 IEEE International Ultrasonics Symposium, 1999-10-17 - 1999-10-20, Caesars Tahoe.

Mulholland, A.J. and Gomez Alvarez-Arenas, T. and Hayward, G. and Gomatam, J. (1999) A renormalisation approach to wave propagation in 0-3/3-3 connectivity composites. In: 1999 IEEE International Ultrasonics Symposium, 1999-10-17 - 1999-10-20, Caesars Tahoe.

O'Leary, Richard and Hayward, Gordon (1998) Modification of the passive phase within 1-3 connectivity piezocomposite transducers for improved device sensitivity. In: ONR Workshop on Acoustic Transduction Materials and Devices, 1998-05-05, Penn State University.

Gachagan, Anthony and Hayward, Gordon (1998) Improving the bandwith of 1-3 connectivity composite receivers using mode coupling. Journal of the Acoustical Society of America, 103 (6). pp. 3344-3352. ISSN 0001-4966

O'Leary, Richard and Hayward, Gordon (1997) Investigation into the effects of modification of the passive phase for improved manufacture of 1-3 connectivity piezocomposite transducers. In: Ultrasonics International, 1997-07-02.

Gachagan, Anthony and Reynolds, P. and Hayward, Gordon and Monkhouse, R and Cawley, P; Schneider, S.C. and Levy, M. and McAvoy, B.R., eds. (1997) Piezoelectric materials for application in low profile interdigital transducer designs. In: 1997 IEEE Ultrasonics Symposium Proceedings. IEEE, CAN, pp. 1025-1028. ISBN 0780341538

Pierce, Stephen and Staszewski, Wieslaw J. and Gachagan, Anthony and James, IR and Philp, WR and Worden, K. and Culshaw, B and McNab, A and Tomlinson, GR and Hayward, Gordon; Regelbrugge, ME, ed. (1997) Ultrasonic condition monitoring of composite structures using a low profile acoustic source and an embedded optical fibre sensor. In: Smart Structures and Integrated Systems - Smart Structures and Materials 1997. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), 3041 . IEEE, Bellingham, pp. 437-448. ISBN 0819424544

Wright, WMD and Hutchins, D.A. and Gachagan, Anthony and Hayward, Gordon (1996) Polymer composite material characterisation using a laser/air-transducer system. Ultrasonics, 34 (8). pp. 825-833. ISSN 0041-624X

Pierce, Stephen and Philp, WR and Culshaw, B and Gachagan, Anthony and McNab, Alistair and Hayward, Gordon and Lecuyer, F (1996) Surface bonded optical fibre sensors for the inspection of CFRP plates using ultrasonic Lamb waves. Smart Materials and Structures, 5 (6). pp. 776-787. ISSN 0964-1726

Gachagan, Anthony and Hayward, Gordon and SP, Kelly and Galbraith, Walter (1996) Characterisation of air coupled transducers. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 43 (4). pp. 678-689. ISSN 0885-3010

Wright, WMD and Hutchins, D.A. and Hayward, Gordon and Gachagan, Anthony (1996) Ultrasonic imaging using laser generation and piezoelectric air- coupled detection. Ultrasonics, 34 (2-5). pp. 405-409. ISSN 0041-624X

Hayward, Gordon and Gachagan, Anthony (1996) An evaluation of 1-3 connectivity composite transducers for air coupled ultrasonic applications. Journal of the Acoustical Society of America, 99 (4). pp. 2148-2157. ISSN 0001-4966

Gachagan, Anthony and Reynolds, P. and Hayward, Gordon and McNab, A; (1996) Construction and evaluation of a new generation of flexible ultrasonic transducers. In: 1996 IEEE Ultrasonics Symposium Proceedings. IEEE, USA, pp. 853-856. ISBN 0780336151

Pierce, Stephen and Philp, WR and Gachagan, Anthony and McNab, Alistair and Hayward, Gordon and Culshaw, Brian (1996) Surface- bonded and embedded optical fibres as ultrasonic sensors. Applied Optics, 35 (25). pp. 5191-5197. ISSN 1559-128X

Philp, WR and Pierce, Stephen and Gachagan, Anthony and McNab, A and Hayward, Gordon and Culshaw, B; (1996) Ultrasonic condition monitoring of CFRP and GRP plates using a surface mounted source and an embedded optical-fiber sensor. In: 3rd International Conference on Intelligent Materials- 3rd European Conference on Smart Structures and Materials. SPIE, GBR, pp. 174-179.

Gachagan, Anthony and Pierce, Stephen and Philp, WR and McNab, A and Hayward, Gordon and Culshaw, Brian; (1995) Detection of ultrasonic lamb waves in composite plates using optical-fibres. In: 1995 IEEE Ultrasonics Symposium, 1995. Proceedings. IEEE, GBR, pp. 803-806. ISBN 0780329406

Wright, WMD and Hutchins, D.A. and Gachagan, Anthony and Hayward, Gordon; Thompson, Donald O. and Chimenti, Dale E., eds. (1995) Evaluation of fiber-reinforced composites using noncontact laser air- transducer system. In: Review of Progress in Quantitative Nondestructive Evaluation. Springer, pp. 1333-1340. ISBN 9781461358190

Hutchins, D.A. and Wright, WMD and Hayward, Gordon and Gachagan, Anthony (1994) Air coupled piezoelectric detection of laser -generated ultrasound. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 41 (6). pp. 796-805. ISSN 0885-3010

Gachagan, Anthony and Galbraith, Walter and Hayward, Gordon; (1994) Wideband characterization of air coupled transducers. In: 1994 IEEE Ultrasonics Symposium, 1994. Proceedings. IEEE, JPN, pp. 483-486. ISBN 0780320123

Gachagan, Anthony and Bennett, JT and Hayward, Gordon; (1994) A finite-element modelling approach into the influence of mechanical matching and damping in 1-3 piezocomposites. In: 1994 IEEE Ultrasonics Symposium, 1994. Proceedings. IEEE, JPN, pp. 995-998. ISBN 0780320123

Hayward, Gordon and Gachagan, Anthony and Hamilton, R. and Hutchins, D.A. and Wright, WMD; Lizzi, FL, ed. (1992) Ceramic-epoxy composite transducers for noncontacting ultrasonic applications. In: New Developments in Ultrasonic Transducers and Transducer Systems. Proceedings of the Society Photo-Optical Instrumentation Engineers (SPIE), 1733 . SPIE, pp. 49-56. ISBN 0819409065