A continuously variable transmission comprises a cone shaped member having a shaft centrally positioned therethrough and having a plurality of radially extending wings. A hardware unit is used to calculate additional information for the protocol overhead, including calculating length and error checking values. Serrations on each of the opposing walls of the seal retention groove are offset to moderate differing stress concentrations in the groove walls. In certain embodiments, a DLC layer may be provided over the anti-etch layer. All of this can be achieved without reducing the display area of the display. A fast switching machenism can be used as the interface between an ion mobility spectrometer and a mass spectrometer such that the obtained IMS spectrum is converted into a timing diagram that controls the vacuum inlet’s size dynamically during analysis of a neutral andor charged chemical andor biological species such that a smaller pumping system can be used.