A system and method for amplifying cellular signals and reducing interference introduced into a cellular network by the network amplifiers. The upper surface defines a plurality of separators and a plurality of individual compartments in an alternating manner about a circumference of the watering disc. A residual concentration of the nitroxide-based polymerization inhibitor is measured substantially in real time, and an optimized dosage of the nitroxide-based polymerization inhibitor is provided in response to the measured residual concentration. A vertical interconnect process may be used to electrically connect the nonvolatile memory dies to each other, as well as other system components. Circuits with leakage cancellation abilities are also disclosed.