Calculating thermal conductivity in a transient conduction regime: theory and implementation Claudio Melis, Riccardo Dettori, Simon Vandermeulen and Luciano Colombo Eur. Phys. J. B, 87 4 (2014) 96 Published online: 23 April 2014 DOI: 10.1140/epjb/e2014-50119-0