A sample hold circuit is provided for use in a time-interleaved AD converter apparatus including a plurality of low-speed pipeline AD converters which are parallelized. The organic film has first raised and recessed portions at a surface thereof, and second raised and recessed portions formed at a surface of the first raised and recessed portions. According to some embodiments, the centrifugal compressor pushes a fluid through the electrical machine, whereas, in other embodiments, the centrifugal compressor pulls the fluid through the electrical machine. E-mail messages may be transmitted from a computer which is attached to a device which is being monitored or controlled and include information regarding the status, usage or capabilities of the attached device. The probes are cell permeable and may use, for example, a QSY7 quencher and a BODIPY dye.