The preferred embodiments described herein provide a memory device and methods for use therewith. The folding component is disposed on a central position of the hammock, and the folding component includes an upper surface, a lower surface and an avoiding section passing through the upper surface and the lower surface. The data structure includes a condition portion and an execution portion of a rule. Further a correction unit is provided for correcting the initial image signal, notably for disturbances due to delayed transferred charges, that have been retained in the sensor elements for some time. The custom alert may provide advance notice of the data communication and specify that the custom alert be presented on the communication device before receipt of the data communication. Comparison information based on the differences can be generated.