Abstract: The present invention is a system that enhances security at an institution by supporting increased security associated with the access and distribution of physical and electronic keys and combinations. The present invention is an advanced security control system that uses unique user credentials, QR code matching, and indisputable day/date stamps to validate events, and logs all event details in a verified format. The system provides enhanced security for access to secure areas with verified logging of event details. The system also provide for secure tracking of keys, combination inventory and issuance, along with verified tracking, issuing, and storage of electronic keys, codes, and combinations.

Abstract: A method of testing for defects in welds of a structure, such as a pipeline or plate structure. One or more ultrasonic guided wave transducers are placed against a wall of the structure. The orientation of the transducer(s) is such that guided waves are directed toward a weld at an angle to the weld. The transducer(s) are used to deliver guided waves and to receive reflection signals, which are then processed to indicate if a defect is present in the weld.