Yi Liu has successfully completed her PhD viva today with a thesis entitled, "Flexible Self-regulating Heating Composites." She was supervised by Emiliano Bilotti and James Busfield but was also significantly supported by Han Zhang and Ton Peijs. Yi's work on optimising the mechanical and pyroresistive behaviour of conductive polymer composites has already contributed to a total of 11 journal papers and a patent. She has been one of the most collaborative and significant contributors to the polymer / composite research group in SEMS for the last four years. She has recently moved to Imperial to take up a PDRA position there.