Self-calibration for a memory controller is performed by writing a voltage to a selected cell. The methods include methods of treating andor preventing disorders ameliorated by the reduction of levels of TNF-\u03b1 or the inhibition of PDE4. The physical structure of the contact scheme is broken down into three components, a) the GaN, b) an interface material and c) the metallic conductor. The second game machine reconstructs the first game space based on this reconstruction information, so that the 2P player can play the game within the reconstructed game space. Distance determination may be based on a homography transform andor reference image data representing the object, a same type or similar type of object, in more approaches.