A network device coalesces data received from an exchange, and provides a user with the opportunity to receive fewer, but up-to-date, data updates from an exchange when duplicate prices become available or a large volume of prices becomes available suddenly. An interchangeable cannula is mounted on the hollow needle of such a pipette, said cannula being capable of containing additional functional elements such as filters, chemically active phases and the like. In such an embodiment, a circuit is configured to integrate a demodulated signal to generate an integrated signal having a triangular shaped output signal. Each heater element is in the form of a beam suspended over at least a portion of the bubble forming liquid so as to be in thermal contact therewith. The method may further include: sectioning the second portion into a second set of separate portions, each separate portion in the second set including the multifidus dorsi, complexus, and longissimus dorsi muscles.