Jem’s research focuses on materials and methods that reduce vibration in machinery and components. This includes: modelling and characterisation of hyperelastic and viscoelastic behaviour in polymers; designing of lightweight polymer-particulate composites; explaining damping mechanisms in materials with friction-inducing microstructures and in granular dampers; developing adjustable dampers using piezoelectric and shape memory alloy materials; and tailoring / optimising these technologies for use in specific applications in the aerospace, energy, land/marine transport and consumer goods industries. The research has progressed through collaboration with industrial partners and research council funded grants.