An electrical box assembly for mounting an electrical device or fixture on a wall. The determined gradients are averaged with previous determined gradients of the image pixels, and with gradients of neighboring pixels as a function of their respective distances to the image pixel, the averaging generating averaged pixel gradient models for each of a plurality of pixels of the video image data of the static image scene that each have mean values and weight values. When order conditions are inputted, an image which is processed on the basis of the order conditions is displayed on the monitor. The length of any communication message necessary to transmit this information, plus any sequencing and acknowledgment overhead, is calculated in advance and aggregated. One type of article is plastic lumber, which can be in the form of a railroad tie or a marine piling. The voltage generated between the first and the second electrode of the piezoelectric element is amplified via a suitable amplifier circuit and supplied, for example, to a controller of an operating device of an electronic domestic appliance.