Abstract: The invention relates to a substrate which is made from paper and is provided with at least one integrated circuit which is produced from a semiconductive organic polymer. A semiconductive organic polymer of this nature, when used as the base material for the integrated circuit, leads to the possibility of directly producing the substrate in the required thickness, to the need for support layers and/or protective layers being eliminated, and to the possibility of reducing the cost price of the substrate compared to substrates which comprise an integrated circuit of the silicon type.

Abstract: Multiple individual profiles may be concurrently selected and applied in combination to a search system, forming an ad hoc profile enabling quick identification of content of high recommendation to all whose profiles are selected. Such ad hoc combination profiles are especially advantageous for forming dynamic group profiles which automatically track changes to individual member profiles and which are easily adapted by addition or deletion of a member, and may be used in conjunction with portable profiles communicated between systems. A variety of combination techniques may be employed for merging the multiple profiles, from simple averaging of rating values to more complex models allowing variable weighting or selective applicability of user profiles or the search attribute values therein.