Apparatuses, methods and computer program products for scan plane geometry definition in tomographic data acquisition via an interactive three-dimensional graphical operator interface. The method involves providing functional electrical stimulation to facial muscles of the individual so as to elicit a detectable contraction in said muscles associated with a facial expression associated with a desired mood or emotional parameter. The second ladder has two rails interconnected by a plurality of steps and a second set of grooves, interconnected to the first set of grooves, that receive the tambour device so the first ladder and the second ladder can be used and inhibits a person from entering the area between the first ladder and the second ladder through the second ladder’s steps. 0 and the first catalyst system comprises a catalyst and is free of platinum group metals and introducing air into a portion of the exhaust in between the first catalyst system and a second catalyst system, wherein the second catalyst system is free of platinum group metals. The latch mechanism includes an exterior latch release mechanism and an interior latch release mechanism. Furthermore, the invention relates to a document of value, a transfer material and method for producing such security elements and documents of value as well as a method and an apparatus for checking such a security element or document of value.