What is the fine-grained topic of the following text: Moderated by Prof. Wolfgang Prinz, over 150 participants enjoyed presentations by State Secretary Annette Storsberg, Fraunhofer President Reimund Neugebauer, Siemens top manager Armin Schnettler, Humboldt Professor Wil van der Aalst, RWTH communication scientist Martina Ziefle. Only return the topic.
Academic and Industrial Presentations at a Conference