Professor Emmerich Wilhelm is Vice-Head and Head of the Institute of Physical Chemistry at the University of Wien, Vienna, Austria. Prior to that, he was Visiting Professor at Wright State University, Dayton, Ohio, USA, the Université Blaise Pascal, Clermont-Ferrand, France and the University of Salzburg, Salzburg, Austria. For many years, Professor Wilhelm was a member of the Editorial Boards of Solubility Data Series (IUPAC), Fluid Phase Equilibria, Materials Chemistry and Physics, International DATA Series A, Thermochimica Acta and an Associate Member, and/or National Representative, and/or Member of the IUPAC Commission I.2: Thermodynamics and the IUPAC Commission V.8: Solubility Data (Gas Solubilities). He was also a Member of the Board of Directors of the European Society of Applied Physical Chemistry, US Calorimetry Conference and the International Council on Materials Education. Professor Wilhelm has published over 160 papers in peer reviewed journals in the areas of thermodynamics, physical chemistry of solutions, was Co-Organizer of 20 international scientific conferences and has given more than 110 Plenary/Keynote/Invited Lectures. He has been the recipient of the Felix-Kuschenitz Award (Thermophysics), Austrian Academy of Science, the Huffman Award, Calorimetry Conference, USA and the Doctor Honoris Causa, Université Blaise Pascal, Clermont-Ferrand, France.

Professor Trevor M. Letcher is Emeritus Professor of Chemistry at the University of KwaZulu-Natal, Durban and a Fellow of the Royal Society of Chemistry. He is a past-Director of the International Association of Chemical Thermodynamics and his research involves the thermodynamics of liquid mixtures and energy from landfill. He has published over 250 publications in peer review journals and edited and co-edited 8 books in his research fields. His latest edited and co-edited books are: Heat Capacities (2010), Climate Change (2009) and Waste (2011).