A user device on a wireless network includes a receiver, a noise detector and a noise determiner. In one aspect, a method includes receiving a request for a content item to be provided with a search results page and determining that one or more retargeted content items are eligible for presentation with the search results page. In another arrangement, another type of energy source besides the capacitor is used. The fixation mechanism comprises a M tine elements arrayed in a tine element array along a segment of the lead proximal to the stimulation electrode array. The second tensile force is sufficient to break the flexible loop, thereby freeing the delivered device from the endoscope at its destination location, e. A closing mechanism is provided on the closeable end of the body.