Search results of a search query on a network are ranked according to an additional ranking function for the prior probability of relevance of a document based on document property. According to the invention, the signal processing unit comprises a chopper amplifier, which switches or balances the polarity of the analog electrical signal present at its input and supplied by the sensor element, and the amplified analog electrical or digitized signal present at its output, at the same clock rate. An optional performance-enhancing active is coupled to the composite particle material before, during, or after the particle-forming process, homogeneously andor in layers. Auto log off functions may be set based on time of inactivity andor number of individual users. The locking end of the post keys to a pad aperture to rotatably align the post to an appropriate securement position.