 A paper based on his 2014 presentation was published in "Acta Astronautica" in 2015.It describes a model for a superconducting resonant cavity and three models for thrusters with multiple cavities, with hypothetical applications for launching space probes.In 2016, Shawyer filed further patents and launched a new company, "Universal Propulsion Ltd.", as a joint venture with "Gilo Industries Group", a small UK aerospace company.