Karlsruhe Institute of Technology (KIT)
        
    
    Author in the following contributions
- Muon number rescaling in simulations of air showers
 - A complete model of the signal in surface detector arrays and its application for the reconstruction of mass-sensitive observables.
 - Study on the combined estimate of the cosmic-ray composition and particle cross-sections at ultrahigh energies
 - Neutron production in extensive air showers
 - Highlights from the Pierre Auger Observatory