Abstract: In an embodiment, a network service provider (NSP) operates a provider network to provide VPN services to its customers. A VPN links various customer sites allowing customers to send data between these sites over the NSP network. Each site network includes a customer edge router (CE) while the provider network includes a plurality of provider edge routers (PEs) to communicate with the CEs. The PEs include virtual routing address (VRFs), and the PEs and CEs include interfaces (IFs). A database stores information related to the relationships between the network components (e.g., VPNs, PEs, CEs, VRFs, IFs, etc.), and a management software package (MSP) has access to the database. When a fault occurs, the MSP, based on collected information and information in the database, determines the impacted network components. Other features include classifying the seriousness of the network's faults and representing different faults by a color scheme.

Abstract: A system and method that provides improved fault detection in turbine engines is disclosed. The fault detection system provides the ability to detect symptoms of engine faults based on a relatively limited number of engine parameters that are sampled relatively infrequently. The fault detection system includes a sensor data processor that receives engine sensor data during operation and augments the sensor data. The augmented data set is passed to a fuzzy logic inference system that determines the likelihood that a fault has occurred. The inference system output can then be passed to a diagnostic system where evaluation of the output may yield a detailed diagnostic result and a prediction horizon.

Abstract: A system and method includes receiving an event, for example, from a frame relay network or from a system log. Whether the event designates a virtual circuit fault in at least one of the local network, the service provider network, or the communications link is determined. When the event designates a virtual circuit fault it is distinguished which of the local network, the service provider network, or the communications link is the source of the fault.

Abstract: A system for measuring pitting corrosion in metal using a digital camera having a lens and an output unit for identifying the color of a metal coupon on a gray scale and providing an output in the midrange of the scale when non corroded and different output after exposure to a corrosive environment. A computer is connected to the output of the camera to display the photographs to permit observation of the gray scale output based upon a minimum and maximum threshold inputs which are adjustable based on an observation of pitting. The points of interest on the coupon representing observed pitting are recorded and summed to calculate an estimated corrosion area corresponding to pitting the said coupon as a percentage of the total coupon area.

Abstract: A system for measuring pitting corrosion in metal using a digital camera having a lens and an output unit for identifying said color of a metal coupon on a gray scale and providing an output in said midrange of said scale when non corroded and different output after exposure to a corrosive environment. A computer is connected to said output of said camera to display said photographs to permit observation of said gray scale output based upon a minimum and maximum threshold inputs which are adjustable based on an observation of pitting. The points of interest on said coupon representing observed pitting are recorded and summed to calculate an estimated corrosion area corresponding to pitting on said coupon as a percentage of said total coupon area.

Abstract: A corrosion sensor and method for its use to detect and determine the, type, location, size and growth rate of corrosion of metals and the like in a corrosive environment. The corrosion sensor can distinguish between different types of corrosion such as uniform corrosion, pitting, crevice, and stress corrosion cracking. The sensor detects corrosion conditions of a corrodible metal article in a corrosive environment. It has a metal probe comprised of a metal which is substantially identical to that of the corrodible metal article and a transducer element attached to said probe, which is capable of projecting and receiving ultrasonic or radio frequency signals through the probe. The received signals indicate corrosion of the probe and hence the corrodible metal article.

Abstract: A corrosion sensor and method for its use to detect and determine the, type, location, size and growth rate of corrosion of metals and the like in a corrosive environment. The corrosion sensor can distinguish between different types of corrosion such as uniform corrosion, pitting, crevice, and stress corrosion cracking. The sensor detects corrosion conditions of a corrodible metal article in a corrosive environment. It has a metal probe comprised of a metal which is substantially identical to that of the corrodible metal article and a transducer element attached to said probe, which is capable of projecting and receiving ultrasonic or radio frequency signals through the probe. The received signals indicate corrosion of the probe and hence the corrodible metal article.