The present invention relates to a method of manufacturing magnesium alloy processing materials capable of improving low cycle fatigue life. The roll is brought into an operating position by an actuator as a result of the carrier being moved out of its loading position. The commutation enable mode applies when the absolute value of the position error is greater than or equal to the predetermined threshold, and corresponds to normal commutating operating mode. The log may be used to recommend offerings for products or services to the user. In a preferred embodiment there are two categories and reply messages in a first one of the categories are displayed on a first side of a display and reply messages in a second one of the categories are displayed on a second side of the display. This database is used by a transformation module which enables an MR image acquired at one prescribed set of scan parameters to be transformed into MR images that simulate MR images acquired with different scan parameters.