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Computer program products are configured to allow dual operational modes of packaging systems to produce encased products using interchangeable first or second horns. The method includes determining relationships between the tasks and generating a task network comprising the tasks of the first process. A transition assembly is positioned between the proximal cannula and the distal end section. The reduced expression is nested in the single abstraction by: appending a selected prefix of the composed abstraction to the reduced expression, binding the open variables of the reduced expression to the formal parameter of the selected prefix, and computing the type of the formal parameter of the selected prefix. Such methods are believed to be useful for affecting neuroregeneration, cell proliferation, cell differentiation, extracellular matrix formation, myelination, inflammation, immune function, liver function, pancreatic function, angiogenesis, or wound healing; andor for preventing or treating diabetes. There is provided a sound collector for collecting voices and converting the voices to a voice signal, a communication unit for communicating with a cellular phone terminal according to a predetermined communication protocol, and a reproducing unit for reproducing the voice signal received in the communication unit.