This invention is a system and method of locating a target using distributed antenna. A CD player 1 includes a device body 3, conveying unit 5, playback unit 5, and holding member 7. In another aspect, a position engine comprises a mapped space of a physical environment, and a processor for updating the mapped space in response to received measurements. The position of the presenter is compared with the stored segments to identify the segment currently occupied by the presenter. The superhydrophilic amphiphilic copolymer system generates stable foam for use in applications, such as healthcare formulations, with low irritation of the eyes and skin.