The present invention relates to thienopyrimidine compounds which are potassium channel inhibitors. The oxide semiconductor layer comprises Sn, O and one or more elements selected from the group consisting of In, Ga and Zn. The resulting Bayes-corrected scoring matrix is used to predict the relative binding affinities of candidate T-cell epitopes derived from immunologically relevant antigens of self or foreign origin. The pivoting motion of the gripper arm is controlled by at least one magnet, particularly a permanent magnet. In addition, a spiral resistor is placed over the drift region and is connected to the drain and either the gate or the source of the transistor. At most one perimeter structure houses less than R rows of server racks.