The amount of accumulated particulate matter, which is accumulated in a particulate filter, is computed based on the amount of exhausted particulate matter, which is exhausted from an engine, and the amount of reduced particulate matter, which is reduced in the filter. Apparatuses and methods include an electronic, mechanical, or electro-mechanical actuator system used to rotate a hooking arm. The contacting portions are arranged in two rows and in a staggered fashion and have a pitch in each of the two rows. The dry phase and the liquid phase are drawn off. Improved security and reduction of pirating of the digital content are therefore provided.