Congratulations to Donal Harkin for passing his PhD viva today (Tuesday 29 October)! The External Examiner was Colin Cotter (Imperial) and the Internal Examiner was Janet Godolphin. Donal‘s supervisor is Naratip Santitissadeekorn. The title of Donal’s thesis is: “Parameter Estimation and Inverse Problems for Reactive Transport Models in Bioirrigated Sediments“.