Secure site-to-site transactional communication between at least two network servers coupled to a data communication network, including secure registration by an authentication server associated with a multi-site user authentication system. The transparent conductive layer is formed on a surface of the transparent substrate. The actuating unit is coupled to the driving shaft and abutted against the tray for pushing down the tray to separate from the document blocking unit. By mapping these statistical features onto the control parameters, the perceptual quality and naturalness of the scene being imaged may be based on the values of these control parameters. Provisions are made for an authorized calling party to bypass the quiet time period. The axial extension of the stent component, with portions of the graft still joined to the stent component, allows the device to be \u201cunraveled\u201d and removed through a catheter of diameter adequately small to be inserted into the body cavity that contained the stent-graft.