A thermoplastic foam is provided which contains a thermoplastic resin and a layered silicate and in which foam cells and the layered silicate are evenly and finely dispersed. A virtualization device is notified in the case where the data relocation in the particular subsystem is impossible. A pose bin associated with the detected face is then identified based on the face data. The casing is preferably tubular and seamless and is produced by extrusion of a corresponding thermoplastic mixture.