In a method for starting a synchronous machine, a default torque is predefined, and a rotational speed of the synchronous machine is adjusted after starting. A magnetic resonance imaging system and a method of tuning the RF body coil are also described. The method includes providing a plurality of queues, each queue of the plurality of queues having an assigned weight, respective ones of the plurality of input paths being coupled to respective ones of the plurality of queues. A second exhaust valve in the housing is coupled to the first conduit and regulates a flow of exhaust gas from the first conduit. Extension of the arms enables them to contact the inside surface of a caissonjacket leg and thus center and anchor the frame within the caissonjacket leg interior. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.