Publications Timo Hensler Martin Tupy Timo Strer Thorsten Pöschel Karl-Ernst Wirth Positron Emission Particle Tracking in Fluidized Beds with Secondary Gas Injection Powder Technology 279, 113-122 (2015) Timo Hensler Martin Tupy Timo Strer Thorsten Pöschel Karl-Ernst Wirth Particle Tracking In Fluidized Beds With Secondary Gas Injection Procedia Engineering 102, 850-857 (2015) Jonathan Kollmer Martin Tupy Michael Heckel Achim Sack Thorsten Pöschel Absence of Subharmonic Response in Vibrated Granular Systems under Microgravity Conditions Physical Review Applied 3, 024007 (2015)