A method is disclosed to efficiently manage membership within a hierarchical data structure. The first conductive trace defines a first conductive periphery and is deposited on a first surface. Delayed-release coatings may be substantially stable in gastric fluid and substantially unstable in intestinal fluid, thus providing for substantial release of the tight junction agonist andor antagonist from the composition in the duodenum or jejunum of the small intestine. Next, the portable device awaits a billing authorization from the access providing entity and, thereafter, data is exchanged with the wireless hotspot by the portable device when a billing authorized is received from the access providing entity. In at least one embodiment, program, sense, and erase operations in a memory are performed with back biased operation, such as to improve high voltage device isolation and cutoff in string drivers and bit line drivers, and no nodes of the circuitry are biased at zero volts.