**About the Editors**

**Jos´e L. Oca ˜na** is Chair Professor in Mechanical Engineering at the Polytechnical University of Madrid (Spain), where he earned his Ph.D. in 1982. He has developed scientific collaborations and stages in most relevant worldwide experimental laser and nuclear fusion facilities, including Kernforschungszentrum Karlsruhe (Karlsruhe, Germany), P.N. Lebedev Physical Institute (Moscow, Russia), Institut fur Hochleistungsstrahltechnik (ISLT) TU Wien (Vienna, Austria) and ¨ others. Prof. Ocana was the Founder and Director of the UPM Laser Center at the Polytechnical ˜ University of Madrid (Spain) (1999–2016). He has been an active participant in national (Spain) and European RTDI initiatives, leading projects in the field of scientific and industrial applications of high power lasers. He has authored and co-authored numerous papers in national and international journals and congresses. He is a member of many different specialized committees, associations, and networks. He was the former chair of the EUREKA EULASNET II network on Laser Technology and Applications (2006–2010), and is member of the Executive Board for the European Laser Institute (Vice-President since 2013). He hosted the 4th International Conference on Laser Peening and Related Phenomena in Madrid on May 6th–10th 2013.

**Janez Grum** is retired Professor of Materials Science at the Faculty of Mechanical Engineering, University of Ljubljana (Slovenia). He is the founder and Editor-in-Chief of a new journal, *International Journal of Microstructure and Materials Properties (IJMMP)*, and since 1994 served as the Editor for *Journal: News of Society for Nondestructive Testing* by the Slovenian Society. He was the organizer of the international conferences and the Editor of the 16 conference proceedings and Guest Editor of 30 special issues in various journals, author of 28 book chapters published at ASM, Taylor&Francis, CRC Press, Marcel Dekker, Springer, Kluwer and Academic Press and 16 books with several reprints. He has also published in more than 300 refereed journals and more than 450 conference papers on heat treatment, laser materials processing, and materials testing including nondestructive testing. He is scientific board member of various journals and member of internastional associations. Prof. Grum is a Fellow of the American Society for Materials (ASM), for his "sustained contributions in metallurgical research and technologies, including nondestructive testing, failure analysis, and laser processing of steel and other engineering alloys". He is also a Fellow of the British Institute for Non-Destructive Testing.
