Gwidon W. Stachowiak is an Emeritus Professor at Curtin University, Perth, Western Australia, working in tribology for more than 40 years. He has taught tribology in Australia, Japan, and Switzerland. His research interests include the development of methods for description of multiscale 3D surface topographies, tribocorrosion, and optimization of 3D surface textures for hydrodynamic contacts. He was awarded the Doctor Honoris Causa from the Ecole Centrale de Lyon, France, and the Tribology Gold Medal.Andrew W. Batchelor has been involved in tribology for 30 years and has taught tribology at universities in Australia, Singapore, Japan, Malaysia and India. He has written books on topics relating to materials degradation, biomaterials and bioengineering. Andrew is the founding editor of a book series on biomaterials and has projects on the useful application of friction and wear phenomena.