D
David Howard
Researcher at University of Salford
Publications - 115
Citations - 3294
David Howard is an academic researcher from University of Salford. The author has contributed to research in topics: Gait (human) & Functional electrical stimulation. The author has an hindex of 26, co-authored 106 publications receiving 2884 citations. Previous affiliations of David Howard include University of Manchester & RMIT University.
Papers
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Journal ArticleDOI
FES-UPP: A Flexible Functional Electrical Stimulation System to Support Upper Limb Functional Activity Practice.
M Sun,Christine Smith,David Howard,Laurence Kenney,HM Luckie,K Waring,Paul Taylor,Earl Merson,Stacey Michael Finn +8 more
TL;DR: The FES-UPP system described in this paper has been shown to allow therapists with little or no FES experience and without any programming skills to set up state-machine FES controllers bespoke to the patient’s impairment patterns and activity requirements, without engineering support.
Journal ArticleDOI
Energy flow analysis of amputee walking shows a proximally-directed transfer of energy in intact limbs, compared to a distally-directed transfer in prosthetic limbs at push-off
Robert A Weinert-Aplin,David Howard,Martin Twiste,Hannah L. Jarvis,Alexander N. Bennett,Alexander N. Bennett,Richard Baker +6 more
TL;DR: Energy flow analysis was used to show a reversal in the direction in which energy is exchanged between prosthetic limb segments at push-off, likely a direct result of the lack of push- off power at the prosthetic ankle, particularly in trans-femoral amputees, and leads to their increased metabolic cost of walking.
Journal ArticleDOI
Performance of Optimized Prosthetic Ankle Designs That Are Based on a Hydraulic Variable Displacement Actuator (VDA)
James D. Gardiner,Abu Zeeshan Bari,Laurence Kenney,Martin Twiste,David Moser,Saeed Zahedi,David Howard +6 more
TL;DR: A design optimization and simulation feasibility study for a VDA-based prosthetic ankle that stores the eccentric ankle work done from heel strike to maximum dorsiflexion in a hydraulic accumulator and then returns the stored energy to power push-off.
Journal ArticleDOI
Workspaces of a walking machine and their graphical representation. Part II: static workspaces
TL;DR: The kinematic workspace constraints are established, the displacement is analysed, and an algorithm for investigation of kinematics workspaces is presented for an example walking machine design.
Journal ArticleDOI
Dealing with time-varying recruitment and length in Hill-type muscle models
TL;DR: A new multiple-motor-unit muscle model is presented which considers the muscle to comprise 1000 individual Hill-type virtual motor-units, which determine the total isometric force.