A wireless device is disclosed, including an antenna system comprising one or more antenna elements for sending and receiving a wireless signal. In state-of-the-art color display tubes, a static voltage is applied to the focusing electrode. In the second step, a second electrode overlapping the first electrode is formed on the aggregate board. The method further calls for storing to andor generating as an output from the digital data processing system a result those step. In one embodiment, the method comprises extracting user events from a content access log, tagging each event as positive or negative, determining if a content item is positively interacted and processing the tagged items in a sliding window to determine positive interactions between a pair of content items.