Search Results - Ball, D. H*
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The effects of ball impact location and grip tightness on the arm, racquet and ball for one-handed tennis backhand groundstrokes
Published 2012“…Perturbing griptightness had no substantial effect on centre impact simulations. …”
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Advanced techniques to improve the design of tennis ball cores
Published 2019Get full text
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Milling a cement-based 3D printable mortar in its green state using a ball-nosed cutter
Published 2021Get full text
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Self-stabilizing balls and bins in batches: The power of leaky bins
Published 2018“…In particular, Greedy[2] has an exponentially smaller system load for high arrival rates.…”
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Validation of a technical intervention to correct an illegal bowling action using a smart cricket ball
Published 2024Get full text
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Self-stabilizing balls & bins in batches: The power of leaky bins [Extended Abstract]
Published 2016“…In particular, Greedy[2] has an exponentially smaller system load for high arrival rates.…”
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Ball grid array-module with integrated shaped lens for WiGig applications in eyewear devices
Published 2016“…The radiation exposure is evaluated for a homogeneous SAM head phantom and a heterogeneous visible human head. …”
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3D printed utility dielectric core manufacturing process for antenna prototyping
Published 2018“…A prototyping method for dielectrically loaded antennas is presented. Dielectric loading has been used with horn antennas, feeds, and lenses. …”
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The relationship between bowling intensity and ground reaction force in cricket pace bowlers
Published 2022“…Twenty participants each bowled 36 deliveries, split evenly across three perceived intensity zones: low = 70% of maximum perceived bowling effort, medium = 85%, and high = 100%. Peak force and loading rate were significantly different across the three perceived intensity zones in the horizontal and vertical directions (Cohen’s d range = 0.14–0.45, p …”
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Supplementary information files for The relationship between bowling intensity and ground reaction force in cricket pace bowlers
Published 2023“…Twenty participants each bowled 36 deliveries, split evenly across three perceived intensity zones: low = 70% of maximum perceived bowling effort, medium = 85%, and high = 100%. Peak force and loading rate were significantly different across the three perceived intensity zones in the horizontal and vertical directions (Cohen’s d range = 0.14–0.45, p …”
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Table tennis event detection and classification
Published 2015“…Throughout the thesis, table tennis has been chosen as the example sport for observational and experimental analysis since it offers a number of specific CV challenges due to the relatively high ball speed (in excess of 100kph) and small ball size (40mm in diameter). …”
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Aerodynamics of an in-flight football using 3D particle tracking velocimetry
Published 2024Get full text
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Application of 3D stereophotogrammetry for characterising dynamic association football kick launch parameters and flight trajectories
Published 2024“…However, 3D stereophotogrammetry, using a GOM Aramis system, applied with a high-speed video camera pair, has been utilised in golf ball tracking, with excellent accuracy and demonstrable benefits over other commercially available systems. …”
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The influence of impairment type on the biomechanics of the wheelchair tennis serve technique
Published 2022“…Moreover, when the injury was restricted to the lower limbs, regardless of impairment type, players could still hit relatively high-speed serves using similar technique. …”
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An investigation of elbow loading in one-handed tennis backhand groundstrokes using computer simulation
Published 2007“…Rigid hand, forearm, upper-arm and torso segments were driven by joint angle time histories obtained from backhand performances. …”
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Evaluation of a subject-specific, torque-driven computer simulation model of one-handed tennis backhand ground strokes
Published 2011“…Associated with these factors, the model can be used for a better understanding of the eccentric contraction of the wrist extensors during one-handed backhand ground strokes, a hypothesized mechanism of tennis elbow.…”
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Some properties of a class of stochastic heat and wave equations with multiplicative Gaussian noises
Published 2015“…In the first case we choose Lu := ∂tu, we study the stochastic fractional heat equation of the form ∂tu(t, x) = ∆ α/2u(t, x) +λ σ(u(t, x))N˙ for t > 0, x ∈ B(0, R) ⊂ R d . …”
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On-body near field confining spherical helical antennas
Published 2021“…The “on-body” characteristics were obtained with the antenna in contact with a phantom representing a wearer’s chest. The phantom had been developed using the above dielectric powders in a 3D printed frame and had passed basic tests to show that its performance was close to that of a live human upper chest.…”
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Transient analysis of isothermal elastohydrodynamic circular point contacts
Published 2001Get full text
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Assessment of the accuracy of different systems for measuring football velocity and spin rate in the field
Published 2019“…These results indicate that 2-D high-speed video would be the preferred option for the field assessment of ball velocity, however, radar gun and TrackMan may also be appropriate. …”
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The effect of uphill and downhill slopes on weight transfer, alignment and shot outcome in golf
Published 2018“…Twelve elite male golfers hit 30 shots with a six-iron from a computer assisted rehabilitation environment (CAREN) used to create 5° slopes while collecting 3D kinematics and kinetics of the swing. …”
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Stepovers and signal detection: Response sensitivity and bias in the differentiation of genuine and deceptive football actions
Published 2018“…Analysis revealed that high-skilled players had higher sensitivity than low-skilled players and this was consistent across all spatial occlusion conditions. …”
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Structured biodegradable polymeric microparticles for drug delivery produced using flow focusing glass microfluidic devices
Published 2015“…A strong preferential adsorption of Rhodamine 6G dye onto PLA was utilized to identify PLA portions of the Janus particles by Confocal Laser Scanning Microscopy (CLSM). Uniform hemispherical PCL particles were produced by dissolution of PLA domes with acetone.…”
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Understanding the surface integrity of laser surface engineered tungsten carbide
Published 2021“…The influence of fluence (0.05–0.20 J/cm2), frequency (5–100 kHz), feed speed (250–2500 mm/s) and hatch distance (0.02–0.06 mm) on 2D and 3D surface roughness were analysed using the Taguchi technique. …”
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Novel rework techniques for electronic assemblies
Published 1998Get full text
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Assessment of impact measurement data from low sampling rates.
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The effect of surface geometry on the aerodynamic behaviour of a football
Published 2023“…The post-critical drag coefficient did not significantly correlate with any of the roughness features of the balls. In a spinning case, the balls with high roughness generated a higher side force, this relationship plateaued at a certain level of roughness. …”
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The use of geometrical simplification to model natural fibre composites.
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The efficacy of a golf robot for simulating individual golfer's swings
Published 2007“…The capability of artificial devices to perform human dynamic motions is undoubtedly improving; however, comparatively little scientific effort has been invested to ensure that the swing motions provided by these mechanical devices are representative of golfers' swings. …”
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Knowledge is power? Outcome probability information impairs detection of deceptive intent
Published 2020“…The benefits and costs of prior expectations that are (i.e., congruent) or are not in harmony (i.e., incongruent) with action outcomes appear to be balanced; however, researchers have yet to examine the influence on skilled detection of deception. …”
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A biomechanical analysis of fast bowling variations
Published 2023“…The thoracic angle and wrist angle time histories (back foot contact to ball release) had periods that were significantly different across the three types of delivery. …”
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Next generation cricket bowling machine
Published 2009“…Ball launching machines have been used as a training aid in a number of sports including cricket, however, as with the playing equipment used, these too have seen little development. …”
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A low-volume, low-cost method for Ti-Nb alloys in the selective laser melting process
Published 2022“…In addition, this alloy measured a hardness of 276 HV1. However, this process on its own proved unable to produce fully homogenised alloys and as a result was found to be sensitive to variations in processing parameters. …”
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The feasibility of sports grips customisation using rapid manufacturing methodologies
Published 2006“…The grip significantly influences how a player wields an implement and is also a means for a player to experience impact forces and vibration. …”
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Additive manufacture of sodium beta alumina solid state battery electrolyte
Published 2023“…Energy has been one of the hottest topic in the last two decades and therefore the energy storage devices have attracted significant attention. …”
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Development of a nanodiamond-based lubricant for a versatile use in the beverage industry conveyor systems
Published 2017“…It also shows a better friction-reduction performance in the high loads. The results indicate that the nanolubricant is versatile at both ranges of loading. …”
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Data-driven analysis of decision-making in football
Published 2024“…Nonetheless, this can be a subjective and inconsistent process since these measures can hardly capture all the intricate dynamics in complex high-dimensional data, leading to incomprehension results. …”
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The science of sports surface interactions for synthetic turf surfaces
Published 2008“…However, as part of a PhD research programme at Loughborough University, a comprehensive review of published literature was performed which highlighted a significant lack of quantified research and data regarding the surface properties influencing the traction developed at the shoe-surface interface. …”
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Integrated inpection of sculptured surface products using machine vision and a coordinate measuring machine
Published 1996“…The part features have been enhanced by surface marking and a simple 2-D vision system has been utilised to identify part features. …”
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