The cross talk in the arrayed waveguide grating of the invention can be suppressed. The disc drive contains a body assembly which is inserted into the memory card slot and which has a compatible connector at one end. In the case where such a factor for determining the calculated stationary object line as to reduce the calculation accuracy of axial deviation is detected in the distribution of stationary objects, the calculation of the amount of the particular axial deviation is canceled. The handoff may also be initiated by the UMTS, the selection being power-based. The temperature compensation may also account for word line position. The disclosure is also directed to compositions containing the drug-cleavable substrate conjugates, and to methods of treatment using them.