A method of inhibiting viruses in which a virus is contacted with an antiviral amount of a compound of formula I. The process and apparatus allow operating the reaction at significantly higher solids content in the circulating fluid slurry. A highest level in the heap has a single position and each succeeding lower level has twice the number of positions as the preceding level. The UE receives the downlink signal and processes the received downlink signal based on whether the first NDI has been determined to be toggled. A particularly operationally reliable connection between the wiper arm and the wiper blade to form the wiper lever is achieved if the locking means are arranged on at least one of the two walls and are moveable essentially transverse to the surfaces of these walls. An elongate valve stem shaft is mounted within the valve stem air passageway and reciprocally moves axially to close off and open the valve stem air passageway to create or close a pressurized air path into the tire cavity as needed.