The invention relates to a method and a device for assisting a driver when maneuvering a vehicle or vehicle-trailer combination which has vehicle elements which can move with respect to one another. Precipitated sodium bicarbonate is separated by filtration as a slurry which is dried to produce ultra-fine sodium bicarbonate. Here, the control processor controls a data readingwriting frominto a first logical volume created using a memory area of plural disk drives, and controls past data such that the past data is written into a second logical volume as differential data on each generation basis, the past data being stored into the first logical volume, and manages the differential data. The X and Y distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section for the bucket. The first portion is disposed above or below the nonmagnetic layer and the free layer. The method includes exposing the substrate to a silicon-containing precursor in the presence of a plasma to deposit a layer, treating the deposited layer with a plasma, and repeating the exposing and treating until a desired thickness of the layer is obtained.