Techniques are described that allow DVR users to create program shortcuts to different types of media content from content providers. On each slat are applied three pins which are engaged by the teeth of the cams whose rotation allows the raising and lowering of the blind. In the compound, V is a vitamin that is a substrate for receptor-mediated transmembrane transport in vivo, or a vitamin receptor binding derivative or analog thereof, L is a divalent linker, R is a side chain of an amino acid, M is a cation of a radionuclide, n is 1 or 0, K is 1 or 0, and the compound can be in a pharmaceutically acceptable carrier therefor. The symbol types may be determined based on transmission characteristics. In this case, in the data transfer apparatus, at a connection part between an inter-nodal crossbar switch 11 for the inter-nodal data transfer and each node 12, 13, a plurality of inter-nodal control devices 123, 124; 133, 134 for processing one inter-nodal transfer command are provided. The delta group in used to determine which deltas to purge.