The invention relates to antacid preparations comprising the following constituents:. If the desired rotational speed is above a predetermined limit, the method performs closed-loop mode control of coil current of the electric motor by varying the average voltage supplied to the electric stepper motor according to observed feedback current from the current feedback loop connected to the electric stepper motor. Via the computer processor, at least a first portion of the bids that were determined for one or more of the bid requests are decreased based on one or more quantitative and qualitative factors, such as missing variable data, of the one or more bid request’s associated data. The method may also include, in the case an association is determined, monitoring tire pressure according to the associated classified tire type.