Method and apparatus for performing midamble cancellation to remove midamble interference from the convolution tail of data field 1 and the first W-1 chips of the midamble field which results from the delay spread of the multipath channel and for canceling the first W-1 chip midamble spread in the data field 2, which operations are performed substantially simultaneously. Another object of the present invention is to provide a method of manufacturing a solid medium for cultivating a plant, which allows hydroponics to be performed through the direct addition of an organic fertilizer even in the case of performing hydroponics with solid medium cultivation. Additional improvements in anti-HIV activity for certain AZT derivatives are seen by providing the pentose ring of AZT with aryl phosphate substitution. Initiating lost mode includes locking the lost device and suppressing select functionality. 5 above the minimum density, is distinguished by its high sensitivity to light, its good color reproduction both when taking photographs in standard light and in other types of illumination such as artificial light from fluorescent lamps, its good reproduction of colors such as that of delphinium, and its high stability on storage under humid climatic conditions.