Because digital incidents are not always from an external source, the focus often is upon the internal network and the people who use it. Frauds, abuses and other insider threats are, by most accounts, more common than externally caused events. In any event, such root cause investigations usually center upon the internal network, the entry point (especially in large-scale virus and worm infecti...

Oscillation in a single control loop can propagate to many units and can cause several control loops to oscillate. In this work, an approach that uses detailed oscillation characterization in combination with signed digraphs is proposed for isolating the source loop that causes plant-wide oscillation. The success of this approach is built on a new oscillation characterization technique that ide...

TCP is the most widely used protocol for data transfer over the Internet and for most applications the performance metric of interest is throughput. Identifying the reasons for the throughput limitation of an observed connection is a complex task. We present a set of techniques, called the TCP root cause analysis toolkit, that allow users to determine from a passively captured packet trace the ...

OBJECTIVE Errors made by clinicians in dental practice require changes in the original planning of patient management. The purpose of this study was to analyze events that led to wrong tooth extraction. METHOD AND MATERIALS A total of 54 insurance claims for wrong tooth extractions were reported and evaluated by Medical Consultants International from 1993 to 2004. Data were collected and anal...