A banknote receiving machine conveys inserted banknotes on a conveying path and corrects their conveying posture by a posture correction device. The frame includes a latch assembly that is movable between a locked and an unlocked position. The stabilized nanotube surface can be exposed to at least one material layer precursor species that deposits a material layer on the stabilized nanotube surface. Because of the high conductivity and tiny size, these globular proteins can be used to develop cost-effective, miniaturized FEDs, molecular diodes and rectifiers for nanocomputer chips. Whether the fingertip candidate region is connected with a hand region is determined.