An unload tube for a combine include an upright lift portion arranged to lift grain therethrough from the onboard grain storage bin and a transfer portion connected to the lift portion by an elbow portion so as to receive grain therefrom. A dedicated reference signal can comprise a set of dedicated reference symbols, which are inserted into a resource block in accordance with a specification provided by a dedicated reference signal structure. Forming a first region of relatively thick material having a predetermined lateral length on the surface of the substrate adjacent the relatively thin dielectric layer. Each nozzle insert includes an passageway in fluid communication with the water inlet of the shower head whereby water introduced into the shower head is ejected from the shower head through the passageway in the nozzle insert. Because the time interval measurement is triggered precisely by the arrival of the first data packet to the complete arrival of the last data packet in the session, there is no quantization error with respect to the first and last data packet. Embodiments of the present invention further include a method and computer program product for optimizing an information processing environment in substantially the same manner described above.