Athanasios A. Tsekouras is associate professor in Physical Chemistry at the NKUA. He has received a BSc in Chemistry at NKUA and a PhD at Stanford University. He benefited from a four-year long postdoctoral research appointment at M.I.T. and a one-year appointment as an adjunct professor at the University of Washington, Pullman, working at Pacific Northwest National Laboratory, Richland, Wash. Since then, he has taught Thermodynamics and Spectroscopy at the Department of Chemistry in NKUA, while pursuing mostly research in Surface Science with vapor-deposited molecules that form electrically polarized films. Thus, he had the opportunity to introduce dozens of students in the tricks and pleasures of working with vacuum systems and doing original and unique research. All along, starting from his early undergraduate days, he has maintained a keen interest in model fitting in a variety of problems.