A door supporting device for supporting a door in a door frame is disclosed. The described embodiments can independently sample andor quantize the entries of an input matrix A, and can thus speed up computation by reducing the number of non-zero entries andor their representation length. The first layer includes damascene tungsten interconnect regions separated by insulative dielectric material. Communications in different areas of a SIC network are independent of one another, so that, unlike current bus topology and star topology, there is no fundamental limit on the size or extent of a SIC network.