A capacitive sensor includes: a first sensing electrode connected to a first reference capacitor in which is stored reference electric charge; a second sensing electrode connected to a second reference capacitor in which is stored reference electric charge; and a shield electrode to which is applied electric potential equal to that of the first sensing electrode and the second sensing electrode. The cable tie includes an elongate metallic strap, a metallic locking head, and metallic roller means. A corkscrew and arm are each pivotally attached to the handle. The media analyzer can analyze content of media that the thumbnail generator can utilize in generating thumbnail image. Data may be post-processed in a substantially continuous manner so as to assess the accuracy of previous forecasts.