Abstract: The invention relates to a rotary piston engine, in particular a rotary engine of trochoidal design, with a side disk (4) on the exhaust side and a rotary piston (6) with at least of one, and preferably three, through-flow openings (6) through which the mixture can flow axially, wherein the side disk (4) on the exhaust side has a side exhaust port (43) and the at least of one through-flow opening (60) has an asymmetric internal contour (600) at least on its exhaust side, so that when the rotary piston (6) passes over the side exhaust port (43) the said side exhaust port (43) is not in fluid communication with an internal area of the through-flow opening (60). The invention further relates to a rotary piston (6) for a rotary piston engine.

Abstract: The display rack comprises a screen, connected to a control circuit, supports for products, furnished with RFID tags, and at least one radiofrequency antenna connected to the control circuit. When a product is removed from the display rack, a multimedia message corresponding to this product is broadcast. When a manager introduces an administration tag, of RFID type, into a zone covered by the antenna, its presence is detected and an administration interface displayed. This interface indicates a type of new product to be placed on the display rack. The identification code of the tag of a new product introduced onto the display rack is automatically detected and associated with the type of product considered. The control circuit can, moreover, cause the broadcasting of a comparative between two products when the latter are removed from the display rack in less than 20 s. A presence detector can allow the broadcasting of appropriate messages upon the approach of a customer.