Dr. Dirk Lellinger has been a senior scientist at the German Institute for Polymers, which now is Division Plastics of the Fraunhofer Institute for Structural Durability and System Reliability in Darmstadt, since 1995. His primary interests are ultrasonic spectroscopy, dynamic-mechanical spectroscopy, and the development of measurement systems for laboratory automation and inline process control. He received his Diploma and a Ph.D. from the Technical University in Merseburg. From 1993 to 1995, he spent two years at the department of physics at the University of Halle.