The present invention provides compounds of formula I . The memory controller includes a read queue, a write queue, and various other queues in which memory transactions may be stored pending execution. Further, the change pixel predictor 4 also reads out the reference image stored in the memory 3, and predicts the change pixel of the particular input signal. An armature is located adjacent the coil, on one side of the axial channel. Also disclosed is an implant for laminoplasty having at least a partially demineralized section and a mineralized section. The barrier rib has discharge spaces between the front substrate and the rear substrate and has a circumferential region formed at a lower height than a height of its central region.