Abstract: A system, method, and program product is provided that provides authentication on a per-role basis in a Role-Based Access Control (RBAC) environment. When a user attempts to acquire a role, the improved RBAC system determines whether (a) no authentication is required (e.g., for a non-sensitive role such as accessing a company's product catalog), (b) a user-based authentication (e.g., password) is required, or (c) a role-based authentication (e.g., role-specific password is required).

Abstract: A system, method, and program product is provided that provides authentication on a per-role basis in a Role-Based Access Control (RBAC) environment. When a user attempts to acquire a role, the improved RBAC system determines whether (a) no authentication is required (e.g., for a non-sensitive role such as accessing a company's product catalog), (b) a user-based authentication (e.g., password) is required, or (c) a role-based authentication (e.g., role-specific password is required).

Abstract: Periodic motions are analyzed by generation of real time moire fringe images. A line grating mounted on the object (1) surface is photographed using a rigidly supported camera (4) from an oblique angle to the plane of the grating. A negative transparency of the line grating is placed within the camera (4) supported by a glass plate and, with the shutter open, the transparency is first registered with the instant image of the stationary line grating then skewed to produce mismatch fringes. A TV camera (6) monitors the subsequent interaction between the skewed negative and the instant image of the line grating on the moving object (1) as seen on the glass plate at the camera image plane and this interaction is displayed on a TV monitor (10). The image is characterized by the presence of a secondary fringe phenomena indicative of object displacements.

Abstract: A door hanger assembly for a rapid transit railway passenger car includes an axially elongated generally cylindrical support shaft, and a door carrier assembly which includes a pair of bearing modules received and supported within opposite ends of a tubular sheath for rolling engagement with the support shaft and a door hanger depending from the sheath. Mounting members connected to opposite ends of the support shaft carry threaded fasteners for securing the hanger assemby to the frame of an associated rail car. Annular wipers and lubricant retainers carried by the bearing modules wipe and lubricate the support shaft as an associated sliding door carried by the hanger assembly moves between its open and closed positions.