In a motion capture system, a unitary input is provided to an application based on detected movement andor location of a group of people. Classes of objects are defined for each HTML element as well as the HTML document. The magnetism detectors generate signals according to the relative changes of the sensing axes with respect to the geomagnetic field. Furthermore, a traversing stroke which is reduced by comparison with the bobbin width is displaced along the bobbin width. When the fiber-forming thermoplastic polymer is a polyolefin, at least one synergist is present and the polybrominated anionic styrenic polymer is no more than about 15 wt % of the fiber or filament.