A hard floor sweeping and scrubbing machine includes a mobile body comprising a frame supported on wheels for travel over a surface, a motorized cleaning head, a waste hopper, a hopper lift and a vacuum squeegee. 5 V\u03bcm to the layer, exposing the layer to the radiation thereby generating a signal, and detecting the signal. The cathode active material of the present invention allows to manufacture lithium secondary batteries with improved safety, especially overcharge characteristics. Additionally, a method for controlling an irrigation system can include providing multiple TDRS’s having probes, distributing each TDRS at a different soil depth, measuring soil moisture content, and irrigating soil based on the measuring step. The N-bit multiplication results are thereafter summed up in parallel by a digital summator. At least a portion of the case is provided with a decorative film having a resin film having transparency and a print layer printed on a back surface of the resin film in a predetermined pattern, and a resin base member formed on a back surface of the decorative film so as to contact the print layer.