A method, computer graphical user interface tool, and computer-readable medium for generating a set of characters for display in gray scale are provided, wherein each character comprises one or more strokesglyphs, and each strokeglyph is defined in silhouette-oriented representation. The headrest is attached to the seat back of a chair, such as an airline seat or a geriatric chair, and is secured thereto with straps or other suitable means. A drain line is also connected to the reverse osmosis module configured to transport concentrate. The sender then XORs the plaintexts with corresponding ciphertexts, and combines the results to form a checksum This checksum is encrypted under the authentication key K2, this value is appended to the encrypted message as a message authentication code. A risk score for each identified risk variable may be determined and an overall risk score for each identified risk may then be determined based on the determined variable risk scores. The process container is removed from the pressure chamber, the product is then removed from the precess container, before or after being cooled to a pre-determined temperature, and is optionally brought back to its original form by means of a mechanical aftertreatment before being placed in the delivery container andor being further processed.