Paul Hagan (http://www.engineering.unsw.edu.au/mining-engineering/staff/paul-hagan), PhD, Associate Professor, Head of School of Mining Engineering, University of New South Wales, Australia. His principal research interests lie in mine geotechnical engineering and mining engineering. He has over 30 years’ experience within the mining industry and university sectors. He has been the principal research investigator leading projects in the rock-cutting research facility. The research has made significant advances in the application of acoustic emissions in monitoring and control of rock cutting machines and in the determination of controlling factors associated with abrasivity testing of rock. He has published 80 peer-reviewed papers, 110 project reports and 3 patents.