A system for wireless communications includes a tower structure supporting at least one transmit antenna at an elevated position on the tower structure and base electronics positioned proximate a base of the tower structure. The work machine includes a power device having a rotary output, a traction element, a transmission configured to provide a transmission ratio between the power device and traction element, an operator input device having a plurality of positions, and a control system. In some embodiments, such a pattern may be generated for one or more families of shallow virtual scan lines and for one or more families of steep virtual scan lines. Lower concentrations of oak bark extract possess additional therapeutic properties not heretofore recognized.