For ensuring high-precision control of a planar motor comprising a magnet and j coils, j=1. The polyesters may be manufactured into articles such as fibers, films, bottles or sheets. The selected bacteria are provided in a therapeutically effective amount in a water solution. The infrared sensor receives infrared rays converged by the convex surface, and converts received infrared rays to electrical signals. The robotic mechanism then moves along the guide structure through the transfer port of the enclosure of the second storage library and into the second storage library for performing operations such as accessing media objects within the second storage library.