Abstract: A security device having at least one durable tactile marking (16) in the form of one or more relief structures is provided. The one or more relief structures are selected from the group of elastically deformable relief structures, relatively compression-resistant relief structures, and combinations thereof. Also provided is a fibrous or non-fibrous sheet material (10) with at least one durable tactile marking, which is suitable for use in making secure and non-secure documents or labels. The tactile marking (s) is applied directly to a surface of the sheet material, or is provided by way of the above-described security device (s), which is mounted on a surface of the sheet material and/or at least partially embedded therein. The durable tactile marking (s) serves to provide a visually challenged person with information concerning the type and/or value of the secure or non-secure document or label.

Abstract: The real time actual and reference values of parameters pertinent to the key safety concerns of a pressurized water reactor nuclear power plant are used to generate an integrated graphic display representative of the plant safety status. This display is in the form of a polygon with the distances of the vertices from a common origin determined by the actual value of the selected parameters normalized such that the polygon is regular whenever the actual value of each parameter equals its reference value despite changes in the reference value with operating conditions, and is an irregular polygon which visually indicates deviations from normal otherwise. The values of parameters represented in analog form are dynamically scaled between the reference value and high and low limits which are displayed as tic marks at fixed distances along spokes radiating from the common origin and passing through the vertices.