An artifact profile signal is generated representing an estimation of the contribution of artifacts to a reference signal G comprising these artifacts, in regions defined around the position of artifact generating element. A computer program product and a sensor node network interface system are also disclosed herein. The board may include a number of contact locations on a first side, with at least one of the contact locations electrically coupled to a via to a second side of the board. The write data of the burst length are written into the memory cell array at one time. When rolling the hollow metal cylinder, the present invention makes the spring contacts create explicit and regular stress variations to produce a sense of feel.