Nonvolatile memory devices utilize vertically-stacked strings of nonvolatile memory cells that can be selectively coupled to common source lines within a substrate. The system comprises a processor having a reference frequency input and a clock having an output connected to the processor input. The transmitter transmits a carrier signal to an antenna. The reinforcing material 12 preferably is arranged in a portion of the gelatin film 11 to be subjected to suturing, and preferably is arranged along a periphery of the, gelatin film 11.