Dr Benjamin Halkon is an experimentally-focused dynamicist specialising in the development and industrially relevant application of non-contact measurements techniques and technologies primarily for the determination of structural vibration characteristics. Ben joined UTS as a Senior Lecturer in the Faculty of Engineering & IT in 2017 and has been a core member of the Centre for Audio, Acoustics and Vibration therefrom. Ben has held the position of Deputy Head of School (Teaching & Learning) in the School of Mechanical and Mechatronic Engineering since early 2018 and has established, and is Academic Lead for, the LDV Lab at UTS Tech Lab - a unique facility within the region. Ben is also a member of the UTS High Performance Research Centre.
Ben has held a number of positions in industry both between completing his PhD and resuming his academic career and after arriving in Australia in 2016. Ben has maintained existing and established new collaborations, both within industry and academia, since moving to Australia following a seven year period at Loughborough University, U.K.. Ben has secured and completed many industry- and government-funded research projects and has supervised several post-doctoral and PhD (HDR) researchers and many UG/PG student projects in support of these. Ben consulted on and provided, through UTS Tech Lab, bespoke laboratory experimental arrangements and associated equipment for the Hollywood hit The Invisible Man, released on February 28, 2020.
Ben has authored over 50 peer-reviewed articles and has contributed to policy change through his research. Ben co-chaired the 18th Asia-Pacific Vibration Conference in November 2019, welcoming over 200 delegates to UTS and leading to peer-reviewed proceedings in three volumes published with Springer. Ben is an Engineering Council accredited chartered mechanical engineer (CEng) and a Fellow of the Institution of Mechanical Engineers (FIMechE), a Fellow of the Institution of Engineers Australia (FIEAust) and chartered professional engineer (CPEng) and a Member of the Australian Acoustical Society (MAAS).
- Member of the UTS Centre for Audio, Acoustics and Vibration
- Member of the UTS Human Performance Research Centre
- Fellow of the Institution of Engineers Australia (FIEAust)
- Fellow of the Institution of Mechanical Engineers (FIMechE)
- Engineering Council accredited Chartered Engineer (CEng)
- Fellow of the Higher Education Council UK (FHEA)
- Member of the Australasian Association for Engineering Education
- Invited speaker Workshop on Non-contact Techniques for Vibro-acoustics, NTU, Singapore, 29-30th November, 2017
- Scientific Committee 13&14th International Conference on Vibration Measurements by Laser and Non-contact Techniques, Ancona, Italy, 19-22th June 2018 & June 2021
- Co-Chair 18th Asia-Pacific Vibration Conference 17-20th November, 2019
- Steering Committee 18th&19th Asia-Pacific Vibration Conference
Can supervise: YES
- The development and application of industrially relevant non-contact measurement techniques using laser Doppler vibrometry
- Laser Doppler vibrometry from vibrating platforms
- Remote condition monitoring of large infrastructure using UAV-mounted laser Doppler vibrometry
- Automated dynamic characterisation of components and systems for quality control using industrial robot-mounted laser Doppler vibrometry
- The validation and application of sports wearable sensor technology for the improvement of sports athlete performance data
- The dynamic characterisation of sports equipment
- Bio-inpsired dynamics and vibration engineering
- Condition monitoring
- Experimental mechanics and dynamics
- Noise, vibration and rotordynamics
- Computer-aided engineering
High frequency noise has generally been difficult to be cancelled actively at a person's ears, particularly for active headrest systems aiming to free the listener from noise cancellation headphones. One of the main challenges is to measure the noise precisely at the ears. Here we demonstrate a new error sensing methodology with an optical microphone arrangement for active noise cancellation (ANC). It can measure the noise accurately for ANC without any obstructions at the listener's ears. The demonstrated system, or virtual ANC headphone as we call it, is shown to provide more than 10 dB attenuation for ultra-broadband noise - up to 6000 Hz - inside the ears in a complex sound field. The bandwidth of the controllable noise significantly exceeds the results from the state-of-the-art system, which is below 1000 Hz. The proposed method leads to the next generation of personal hearing protection system and can open up a whole new area of sound control research.
Halkon, BJ & Rothberg, SJ 2017, 'Reprint of: Taking laser Doppler vibrometry off the tripod: Correction of measurements affected by instrument vibration', Optics and Lasers in Engineering, vol. 99, pp. 3-10.View/Download from: UTS OPUS or Publisher's site
© 2017. Laser Doppler vibrometers (LDVs) are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, the sensitivity to instrument vibration is confirmed before development theoretically and experimentally of a practical scheme to enable correction of measurements for arbitrary instrument vibration. The scheme requires a pair of correction sensors with appropriate orientation and relative location, while using frequency domain processing to accommodate inter-channel time delay and signal integrations. Error reductions in excess of 30. dB are delivered in laboratory tests with simultaneous instrument and target vibration over a broad frequency range. Ultimately, application to measurement on a vehicle simulator experiencing high levels of vibration demonstrates the practical nature of the correction technique and its robustness in a challenging measurement environment.
Halkon, BJ & Rothberg, SJ 2017, 'Restoring high accuracy to laser Doppler vibrometry measurements affected by vibration of beam steering optics', Journal of Sound and Vibration, vol. 405, pp. 144-157.View/Download from: UTS OPUS or Publisher's site
© 2017 Elsevier Ltd Laser Doppler vibrometers are now well-established as an effective non-contact alternative to traditional contacting transducers. Wide-ranging applications include those where beam steering optics are required to reach locations that are difficult to access but no attention has yet been given to measurement sensitivity to the vibration of those optics. In this paper, a thorough mathematical treatment of this sensitivity to steering optic vibration and its correction is set out. A very practical scheme requiring a single correction measurement, from the back-surface of the mirror at the incidence point and aligned with the mirror normal, delivers an error reduction typically in excess of 30 dB. After validation in the laboratory, the scheme is then applied to a genuinely challenging measurement scenario on a single cylinder racing motorcycle. Correction is theoretically perfect for translational mirror vibrations but angular mirror vibrations require an adapted scheme using a triplet of accelerometers arranged around a circular path on the mirror back-surface and this is set out theoretically.
Halkon, BJ & Rothberg, SJ 2017, 'Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration', Optics and Lasers in Engineering, vol. 91, pp. 16-23.View/Download from: UTS OPUS or Publisher's site
© 2016 Elsevier Ltd Laser Doppler vibrometers (LDVs) are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, the sensitivity to instrument vibration is confirmed before development theoretically and experimentally of a practical scheme to enable correction of measurements for arbitrary instrument vibration. The scheme requires a pair of correction sensors with appropriate orientation and relative location, while using frequency domain processing to accommodate inter-channel time delay and signal integrations. Error reductions in excess of 30 dB are delivered in laboratory tests with simultaneous instrument and target vibration over a broad frequency range. Ultimately, application to measurement on a vehicle simulator experiencing high levels of vibration demonstrates the practical nature of the correction technique and its robustness in a challenging measurement environment.
Rothberg, SJ, Allen, MS, Castellini, P, Di Maio, D, Dirckx, JJJ, Ewins, DJ, Halkon, BJ, Muyshondt, P, Paone, N, Ryan, T, Steger, H, Tomasini, EP, Vanlanduit, S & Vignola, JF 2017, 'An international review of laser Doppler vibrometry: Making light work of vibration measurement', OPTICS AND LASERS IN ENGINEERING, vol. 99, pp. 11-22.View/Download from: UTS OPUS or Publisher's site
Stone, BW, Harland, AR, Jones, JA, Mitchell, SR, Sherratt, PJ, Ranson, CA & Halkon, BJ 2017, 'On the dynamic response of an instrumented headform for alternative mounting stiffnesses when subjected to ballistic impacts', Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, vol. 231, no. 4, pp. 324-335.View/Download from: UTS OPUS or Publisher's site
© 2017, © IMechE 2017. The current British Standard for head protectors for cricketers has been recently revised to include a projectile-based battery of tests, the intention being to ensure that a certified helmet will also prevent contact of the ball or grille with the specified headform facial region. The purpose of this study was to characterise the dynamic response of the headform to direct ballistic impacts for alternative headform mounting arrangements. On one hand, and in accordance with the relevant sections of the Standard, what might be described as a ‘Constrained’ setup was evaluated while, on the other hand, an arrangement with significantly reduced stiffness, in line with that previously reported for the passive human neck, was subject to equivalent appraisal. For each mounting scenario, an air cannon was used to project a cricket training ball at three speeds towards the instrumented headform at three locations with five repeats per speed/location combination. High-rate/resolution video and piezoelectric accelerometer data were collected and processed to determine the headform response. While differences between specific ball impact speed and location scenarios are set out in detail later in the article, overall observations are summarised as follows. From a ball/headform contact duration standpoint, video derived results showed ranges of 1.30–1.45 ms (Constrained) versus 1.26–1.41 ms. Maximum ball deformations, the timing of which enabling the event to be subdivided into ‘loading’ and ‘unloading’ phases, were found to be 82.5%–86.2% (Constrained) versus 82.8%–86.4% of original ball diameter; mean peak headform accelerations during loading were found to be 860–1615 m/s 2 (Constrained) versus 967–1638 m/s 2 ; and headform speeds at the end of the loading phase were found to be 0.5–0.92 m/s (Constrained) versus 0.54–0.93 m/s. Differences between headform response for the two mounting arrangements were observed to be more substantial during the loadin...
Payne, T, Mitchell, S, Halkon, B & Bibb, R 2016, 'A systematic approach to the characterisation of human impact injury scenarios in sport', BMJ Open Sport & Exercise Medicine, vol. 2, no. 1, pp. e000017-e000017.View/Download from: UTS OPUS or Publisher's site
Payne, T, Mitchell, S, Halkon, B, Bibb, R & Waters, M 2016, 'Development of a synthetic human thigh impact surrogate for sports personal protective equipment testing', PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART P-JOURNAL OF SPORTS ENGINEERING AND TECHNOLOGY, vol. 230, no. 1, pp. 5-16.View/Download from: UTS OPUS or Publisher's site
Zhang, Z, Halkon, B, Chou, SM & Qu, X 2016, 'A novel phase-aligned analysis on motion patterns of table tennis strokes', INTERNATIONAL JOURNAL OF PERFORMANCE ANALYSIS IN SPORT, vol. 16, no. 1, pp. 305-316.View/Download from: UTS OPUS
Banwell, GH, Roberts, JR, Halkon, BJ, Rothberg, SJ & Mohr, S 2014, 'Understanding the Dynamic Behaviour of a Tennis Racket under Play Conditions', EXPERIMENTAL MECHANICS, vol. 54, no. 4, pp. 527-537.View/Download from: UTS OPUS or Publisher's site
Halkon, BJ & Rothberg, SJ 2014, 'Angular (pitch and yaw) vibration measurements directly from rotors using laser vibrometry', MECHANICAL SYSTEMS AND SIGNAL PROCESSING, vol. 46, no. 2, pp. 344-360.View/Download from: UTS OPUS or Publisher's site
Perrin, R, Elford, DP, Chalmers, L, Swallowe, GM, Moore, TR, Hamdan, S & Halkon, BJ 2014, 'Normal modes of a small gamelan gong', JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 136, no. 4, pp. 1942-1950.View/Download from: UTS OPUS or Publisher's site
Teng, PSP, Leong, KF, Kong, PW, Halkon, BJ & Huang, PY 2013, 'The use of rapid prototyping in the design of a customised ankle brace structure for ACL injury risk reduction: This paper explores the use of three-dimensional (3D) printing in designing a customised ankle brace structure for anterior cruciate ligament (ACL) injury risk reduction', Virtual and Physical Prototyping, vol. 8, no. 4, pp. 241-247.View/Download from: UTS OPUS or Publisher's site
Rapid prototyping, or additive manufacturing, is becoming more useful in creating functional prototypes, especially when customisation is required. This paper explores the use of three-dimensional (3D) printing in designing a customised ankle brace structure for anterior cruciate ligament (ACL) injury risk reduction. A new process is proposed to obtain ankle flexion angles and the corresponding foot surface strain associated with high ACL injury risks through motion analysis. This data is used in the design of the customised ankle brace structure and printed using rapid prototyping. One customised ankle brace structure was printed and tested to demonstrate this proposed framework. The ankle flexion range of motion (ROM) was significantly reduced in the high-risk ankle positions with the ankle brace structure. Rapid prototyping could thus be used to design customised ankle brace structures and this is useful in reducing fabrication time and complexity of customisation. © 2013 Taylor & Francis.
Rothberg, SJ, Halkon, BJ, Tirabassi, M & Pusey, C 2012, 'Radial vibration measurements directly from rotors using laser vibrometry: The effects of surface roughness, instrument misalignments and pseudo-vibration', MECHANICAL SYSTEMS AND SIGNAL PROCESSING, vol. 33, pp. 109-131.View/Download from: UTS OPUS or Publisher's site
Velani, N, Wilson, O, Halkon, BJ & Harland, AR 2012, 'Measuring the risk of sustaining injury in sport a novel approach to aid the re-design of personal protective equipment', APPLIED ERGONOMICS, vol. 43, no. 5, pp. 883-890.View/Download from: UTS OPUS or Publisher's site
Halkon, BJ & Rothberg, SJ 2006, 'Rotor vibration measurements using laser Doppler vibrometry: Essential post-processing for resolution of radial and pitch/yaw vibrations', JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, vol. 128, no. 1, pp. 8-20.View/Download from: UTS OPUS or Publisher's site
Halkon, BJ & Rothberg, SJ 2006, 'Vibration measurements using continuous scanning laser vibrometry: Advanced aspects in rotor applications', MECHANICAL SYSTEMS AND SIGNAL PROCESSING, vol. 20, no. 6, pp. 1286-1299.View/Download from: UTS OPUS or Publisher's site
Halkon, BJ & Rothberg, SJ 2003, 'Vibration measurements using continuous scanning laser Doppler vibrometry: theoretical velocity sensitivity analysis with applications', MEASUREMENT SCIENCE AND TECHNOLOGY, vol. 14, no. 3, pp. 382-393.View/Download from: UTS OPUS or Publisher's site
Halkon, B, Cheong, I, Visser, G, Walker, P & Oberst, S 2020, 'An experimental assessment of torsional and package vibration in an industrial engine-compressor system', Vibrations in Rotating Machinery 12, Liverpool.
Kalhori, H, Halkon, B, Abbasnejad, B, Li, B & Shooshtari, A 2019, 'Nonlinear Vibration of an Electrostatically Excited Capacitive Microplate', Springer, 2020, The 18th Asia-Pacific Vibration Conference, University of Technology Sydney UTS, Sydney, Australia.View/Download from: UTS OPUS
Hadgraft, RG, Francis, B, Fitch, R, Halkon, B & Brown, T 2020, 'Renewing mechanical and mechatronics programs using studios', SEFI 47th Annual Conference: Varietas Delectat... Complexity is the New Normality, Proceedings, pp. 511-522.View/Download from: UTS OPUS
© 2020 SEFI 47th Annual Conference: Varietas Delectat... Complexity is the New Normality, Proceedings. All rights reserved. In a world of rapid change, engineering programs need to adapt to be relevant. This paper addresses the renewal processes for mechanical and mechatronics engineering programs at a large university of technology. The paper sits within a wider curriculum change movement, including all engineering and IT programs at this university. Several meetings have been held over the last 3 years with both industry panels and with academic staff and students to understand the nature of the problem. Using a design-thinking approach, we have explored: global trends, the nature of engineering work and projects, the capabilities required by engineers, and the kinds of capabilities that graduates need to operate confidently in this new world of work. There is a clear need for graduates to be more operational as they move from study to work. Consequently, a major focus on experiential learning is emerging as the key delivery vehicle for new kinds of graduates including projects, studios, and internships. These forms of learning are supported by ready access to online materials as required. A central thread is personalisation of the student learning experience through learning contracts and portfolios. There has been constant demand for change in engineering education for at least the last 20 years. Making change happen, however, is another matter. We are in the fortunate position at this university to have high level support from the Chancellery and the Dean to move our engineering programs to be more relevant to the future. This paper describes the process for engaging our academics, students and industry supporters in that process and will be of interest to many who are grappling with similar transitions.
Halkon, B, Rauter, A, Oberst, S & Marburg, S 2019, 'Research and development of an air-puff excitation system for lightweight structures', 8th International Operational Modal Analysis Conference 2019, Copenhagen.View/Download from: UTS OPUS
Lightweight, thin-walled structures appear in numerous engineering and natural structures. Due to their sensitivity, vibration excitation by, now traditional, contacting techniques, such as modally-tuned impact hammers or electrodynamic shakers, to investigate their dynamics is challenging since it typically adds substantial mass and/or stiffness at the excitation location. The research presented in this article, therefore, is intended to yield a system for the non-contact excitation of thin-walled structures through small, controlled blasts of air. An air-puff system, consisting of two fast-acting solenoid controlled valves, a small air outlet nozzle and bespoke control software with a programmable valve control sequence, is researched and developed. The excitation impulse characteristics are investigated
experimentally and described in detail for varying input control parameters. Ultimately, suitability of the system for the excitation of thin-walled structures is explored, for both a 3D-printed micro-satellite panel and a natural bee honeycomb, with promising results when compared to that of an impact hammer.
Kalhori, H, Halkon, B & Alamdari, MM 2019, 'Wavelet transform-based strategy for identifying impact force on a composite panel', Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019.View/Download from: UTS OPUS
© Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019. All rights reserved. An algorithm based on wavelet analysis for automatically estimating the location and magnitude of impact forces exerted on a rectangular carbon fibre-epoxy honeycomb composite panel is developed. The technique employs a single piezoelectric sensor mounted distant from the impact zone and presumes that an impact is applied at one of several pre-established locations. Furthermore, it is presumed that the recorded vibration response is the superposition of the simultaneous 'assumed' impacts at these locations, with the aim of simultaneously identifying the actual impact location and force magnitude through an under-determined regularisation scheme. The algorithm aims to detect the most probable impact location amongst the spurious locations. Since a normal impact introduces a narrow-band time-localised event with high energy, the wavelet transform is an effective tool to locate this event, with the wavelet coefficient representing how closely correlated the wavelet is with the reconstructed forces. The larger the coefficient is in absolute value, the greater the similarity. As a case study, an under-determined problem with four potential impact locations is considered. The results demonstrate successful localisation and reconstruction of the impact force using both orthogonal and non-orthogonal wavelets
Halkon, B 2019, 'ON THE POSSIBILITY OF UAV-MOUNTED LDVS FOR RESPONSE-ONLY DYNAMIC CHARACTERISATION OF REMOTE INFRASTRUCTURE', International Operational Modal Analysis Conference, International Operational Modal Analysis Conference, Copenhagen.View/Download from: UTS OPUS
Halkon, BJ & Chapman, C 2018, 'On the development and characterisation of a synchronised-scanning laser Doppler vibrometer system', International Congress on Sound and Vibration, Hiroshima, Japan.View/Download from: UTS OPUS
Halkon, BJ & Rothberg, S 2018, 'Towards laser Doppler vibrometry from unmanned aerial vehicles', 13th International Conference on Vibration Measurements by Laser and Noncontact Techniques, IOP Publishing Ltd, Ancona, Italy.View/Download from: UTS OPUS or Publisher's site
Laser Doppler vibrometers are technically well suited to general application but they offer special benefits in a variety of challenging measurement scenarios which are now well documented and accepted. An interesting and potentially powerful example of such a challenging measurement scenario is one where the laser vibrometer is mounted on/in an unmanned aerial vehicle in order that autonomous measurement campaigns can be undertaken in remote and/or harsh environments. One important challenge to overcome in such a scenario is the measurement sensitivity to vibration of the instrument itself or indeed of any steering optics used to point the probe laser beam toward the target of interest. In this paper, recently reported means by which this measurement sensitivity can be rectified by simultaneously obtained correction measurements will be developed. Specifically, this development is intended to lead towards laser Doppler vibrometry from unmanned aerial vehicles (UAVs) with correction of instrument motion being presented herein for the first time from a single, rather than a pair of, uniaxial accelerometers.
Halkon, BJ & Rothberg, SJ 2018, 'Taking laser Doppler vibrometry off the tripod', International Congress on Sound and Vibration (ICSV25), International Congress on Sound and Vibration, Curran, Hiroshima, Japan, pp. 136-143.View/Download from: UTS OPUS
Christensen, J, Rasmussen, J, Halkon, B & Koike, S 2016, 'The Development of a Methodology to Determine the Relationship in Grip Size and Pressure to Racket Head Speed in a Tennis Forehand Stroke', ENGINEERING OF SPORT 11, 11th Conference of the International Sports Engineering Association (ISEA), ELSEVIER SCIENCE BV, Delft, NETHERLANDS, pp. 787-792.View/Download from: UTS OPUS or Publisher's site
Halkon, B & Rothberg, S 2015, 'Correction of laser Doppler vibrometry measurements affected by steering mirror vibration', OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS III, 6th International Conference on Optical Measurement Techniques for Structures and Systems III (OPTIMESS2015), SHAKER PUBLISHING BV, Univ Antwerp, Antwerp, BELGIUM, pp. 117-126.View/Download from: UTS OPUS
Halkon, BJ & Rothberg, SJ 2015, 'A practical guide to laser Doppler vibrometry measurements directly from rotating surfaces', IMechE Vibrations in Rotating Machinery, University of Manchester, UK.View/Download from: UTS OPUS
Oldham, KM, Chung, PWH, Edirisinghe, EA & Halkon, BJ 2015, 'Table tennis and computer vision: a monocular event classifier', PROCEEDINGS OF THE 10TH INTERNATIONAL SYMPOSIUM ON COMPUTER SCIENCE IN SPORTS (ISCSS), 10th International Symposium on Computer Science in Sports (ISCSS), SPRINGER-VERLAG BERLIN, Loughborough, ENGLAND, pp. 29-32.View/Download from: UTS OPUS or Publisher's site
Stone, B, Halkon, B & Harland, A 2016, 'Headform mounting performance in cricket standard testing', ENGINEERING OF SPORT 11, 11th Conference of the International Sports Engineering Association (ISEA), ELSEVIER SCIENCE BV, Delft, NETHERLANDS, pp. 401-406.View/Download from: UTS OPUS or Publisher's site
Stone, BW, Halkon, BJ & Harland, AR 2016, 'An explorative study into the mechanics of projectile impacts to the head', 2016 IRCOBI Conference Proceedings - International Research Council on the Biomechanics of Injury, pp. 369-380.View/Download from: UTS OPUS
There has been little research focused on the mechanics of high-velocity, low-mass projectile impacts to the head. The little work that has been conducted has focused solely on linear acceleration, despite the evidence linking rotational acceleration to the development of brain injury. The aim of this study was to explore the presence of rotational acceleration in projectile impacts and investigate the influence of impact location. A pressurised air cannon was used to project a BOLATM ball at 22 and 28 m.s-1 towards a BSEN 960:2006 headform positioned to elicit impacts at frontal and lateral locations. High-speed video and accelerometer measurements were used to investigate differences in contact duration, ball deformation and average linear and rotational acceleration during loading. Contact duration was found to be independent of impact location or speed. Greater ball deformation was observed in frontal impacts, despite no differences in time to maximum deformation. Average linear acceleration was observed to be greater during the loading phase in the frontal impacts then in the lateral impacts, potentially due to differences in surface geometry, resulting in differences in ball deformation. Average rotational acceleration was greater in lateral impacts potentially due to differences in the moments of inertia of the headform. Rotational acceleration was found to be higher than previously published injury thresholds for concussion and therefore a potentially important factor in projectile impacts, warranting further research.
Oldham, KM, Chung, PWH, Edirisinghe, EA & Halkon, BJ 2014, 'Experiments in the Application of Computer Vision for Ball and Event Identification in Indoor Sports', COMPUTATIONAL INTELLIGENCE IN INFORMATION SYSTEMS, 4th INNS Symposia on Computational Intelligence in Information Systems (INNS-CIIS), SPRINGER-VERLAG BERLIN, Inst Teknologi Brunei, Bandar Seri Begawan, BRUNEI, pp. 275-284.View/Download from: Publisher's site
Sykora, M, Chung, PWH, Folland, JP, Halkon, BJ & Edirisinghe, EA 2014, 'Advances in Sports Informatics Research', COMPUTATIONAL INTELLIGENCE IN INFORMATION SYSTEMS, 4th INNS Symposia on Computational Intelligence in Information Systems (INNS-CIIS), SPRINGER-VERLAG BERLIN, Inst Teknologi Brunei, Bandar Seri Begawan, BRUNEI, pp. 265-274.View/Download from: UTS OPUS or Publisher's site
Zhang, Z, Halkon, B, Chou, SM & Qu, X 2015, 'Shoulder Joint Angle Errors Caused by Marker Offset', IMPACT OF TECHNOLOGY ON SPORT VI' 7TH ASIA-PACIFIC CONGRESS ON SPORTS TECHNOLOGY, APCST2015, 'The Impact of Technology on Sport VI' 7th Asia-Pacific Congress on Sports Technology, APCST, ELSEVIER SCIENCE BV, Barcelona, SPAIN, pp. 479-484.View/Download from: UTS OPUS or Publisher's site
Halkon, B, Mitchell, S, Payne, T & Carbo, J 2014, 'Biomechanical measurements of human impacts in basketball', ENGINEERING OF SPORT 10, 10th Conference of the International-Sports-Engineering-Association, ELSEVIER SCIENCE BV, Sheffield Hallam Univ, Sheffield, ENGLAND, pp. 214-219.View/Download from: UTS OPUS or Publisher's site
Harfield, P, Halkon, B, Mitchell, S, Phillips, I & May, A 2014, 'A novel, real-time biomechanical feedback system for use in rowing', ENGINEERING OF SPORT 10, 10th Conference of the International-Sports-Engineering-Association, ELSEVIER SCIENCE BV, Sheffield Hallam Univ, Sheffield, ENGLAND, pp. 126-131.View/Download from: UTS OPUS or Publisher's site
Udeshi, A, Halkon, B & Coupland, J 2013, 'An alternative technique for investigating fluid flow around the hand during front crawl', 6TH ASIA-PACIFIC CONGRESS ON SPORTS TECHNOLOGY (APCST), 6th Asia-Pacific Congress on Sports Technology (APCST), ELSEVIER SCIENCE BV, Hong Kong, PEOPLES R CHINA, pp. 176-181.View/Download from: UTS OPUS or Publisher's site
Velani, N, Harland, AR & Halkon, BJ 2013, 'The development of a test methodology for the determination of cricket batting helmet performance when subjected to ballistic impacts', 2013 IRCOBI Conference Proceedings - International Research Council on the Biomechanics of Injury, pp. 424-430.View/Download from: UTS OPUS
The study presented in this paper was conducted in support of the development of a proposed revision to a cricket helmet certification test standard. Helmets were impacted between the peak and faceguard by 'projecting' balls at them at velocities up to 80 mph. The velocity at which the balls penetrated between the peak and the faceguard (or grille) for the various permissible peak-grille gap settings for each helmet was recorded. The study progressed to compare these penetration velocities against the equivalent found when 'game-aligned' alternate (drop) test methodologies were used. The results demonstrate that the penetration velocities are considerably lower than those that might be observed in play. As peak-grille gap settings were reduced, penetration velocities increased as expected but, significantly, balls were able to penetrate despite gap settings, on occasion being considerably smaller than the ball diameter. The penetration velocity was also found, as expected, to vary with the stiffness of the ball with increased ball stiffness leading to reduced penetration velocities. When comparing penetration velocities against those found using the alternate methodologies, significant differences were found, suggesting that such methodologies cannot be used to reliably evaluate the performance of helmets to ball impacts occurring in this particular region.
Halkon, B, Webster, J, Mitchell, S & Mientjes, M 2012, 'Development of a test methodology for the assessment of human impacts in sport', ENGINEERING OF SPORT CONFERENCE 2012, 9th Conference of the International-Sports-Engineering-Association (ISEA), ELSEVIER SCIENCE BV, Univ Massachusetts Lowell, Lowell, MA, pp. 813-818.View/Download from: UTS OPUS or Publisher's site
Halkon, B & Rothberg, S 2004, 'Automatic post-processing of laser vibrometry data for rotor vibration measurements', VIBRATIONS IN ROTATING MACHINERY, 8th International Conference on Vibrations in Rotating Machinery, PROFESSIONAL ENGINEERING PUBLISHING LTD, Univ Wales Swansea, Swansea, WALES, pp. 215-230.View/Download from: UTS OPUS
Halkon, B & Rothberg, S 2004, 'Synchronised-scanning laser vibrometry', SIXTH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER TECHNIQUES: ADVANCES AND APPLICATIONS, 6th International Conference on Vibration Measurements by Laser Techniques, SPIE-INT SOC OPTICAL ENGINEERING, Ancona, ITALY, pp. 260-271.View/Download from: UTS OPUS or Publisher's site
Rothberg, S & Halkon, B 2004, 'Laser Vibrometry meets laser speckle', SIXTH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER TECHNIQUES: ADVANCES AND APPLICATIONS, 6th International Conference on Vibration Measurements by Laser Techniques, SPIE-INT SOC OPTICAL ENGINEERING, Ancona, ITALY, pp. 280-291.View/Download from: UTS OPUS or Publisher's site
Halkon, B & Rothberg, S 2003, 'Continuous scanning laser vibrometry for measurements on rotating structures', MODERN PRACTICE IN STRESS AND VIBRATION ANALYSIS, 5th International Conference on Modern Practice in Stress and Vibration Analysis, TRANS TECH PUBLICATIONS LTD, GLASGOW, SCOTLAND, pp. 245-252.View/Download from: UTS OPUS or Publisher's site
Halkon, B & Rothberg, S 2002, 'A comprehensive velocity sensitivity model for scanning and tracking laser Doppler vibrometry on rotating structures', FIFTH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER TECHNIQUES: ADVANCES AND APPLICATIONS, 5th International Conference on Vibration Measurements by Laser Techniques, SPIE-INT SOC OPTICAL ENGINEERING, ANCONA, ITALY, pp. 9-21.View/Download from: UTS OPUS or Publisher's site
Halkon, B & Rothberg, S 2002, 'Comprehensive velocity sensitivity model for scanning and tracking laser vibrometry', PROCEEDINGS OF IMAC-XX: STRUCTURAL DYNAMICS VOLS I AND II, 20th IMAC Conference on Structural Dynamics, SOC EXPERIMENTAL MECHANICS INC, LOS ANGELES, CA, pp. 1166-1170.View/Download from: UTS OPUS