Professor Janis Varna is Professor Emeritus at the Department of Engineering Sciences and Mathematics, Luleå University of Technology, Sweden, and a Leading Researcher at Riga Technical University, Latvia. He has over 30 years of research experience in damage, fatigue, and failure of composite materials with particular emphasis on micro mechanics of fiber/matrix interaction in composites, damage evolution as well as on development of reliable test methodologies for short fiber composites and for fiber/matrix interface characterization.