The Relationship between Equivalent Fall Height and Ground Reaction Force in Freestyle Ski Jumping

This study investigated the relationship between Equivalent Fall Height (EFH) and peak Ground Reaction Force (GRF) in freestyle ski jumping. An experiment was conducted in which a semi-professional freestyle skier was instrumented with Inertial Measurement Units (IMUs) and a position sensor. The skier performed jumps off ‘kickers’ in snow parks...

Design of a safe and realistic sword for European Sword-fighting

Medieval European Sword-fighting is a relatively new martial art. Technique training is mostly done with blunt steel swords. Since these are too dangerous at full speed alternatives are used, made of wood, nylon or bamboo. The alternative weapons lack realistic properties, and make it nearly impossible to apply true techniques in a sparring...