The Lost 18 1/2 Minutes of the Nixon Presidency
Dr. David P. Pappas
Project Leader for the
Magnetic Sensors Quantum Devices Group
National Institute of Standards & Technology,
April 11, 2006
About the Lecture:
In 1996, NIST initiated a five-year program to develop competence in advanced techniques for imaging information stored on damaged magnetic media. Since then, applications have included recovery of forensic evidence for the Federal Bureau of Investigation and recovery of data for the National Transportation Safety Board. The nanoscale recording system (NRS) that was developed is a general-purpose instrument that uses read/write heads similar to those in computer hard-disk or tape drives to read from and write data to magnetic media. The NRS can image by rastering either the head at a resolution of 50 nanometers (nm) or the storage medium at a resolution of 1 nm. The NRS is being used for forensic analysis of audio tapes, high-speed imaging of tape samples, identification of signatures of erase and write heads, and reconstruction of analog and digital data. This talk described the development of large linear scanning arrays and associated electronics, discussed the efficacy of the system for recovering data from damaged magnetic recording media, gave examples of when data can be recovered (and when it can not), and showed applications for magnetic data storage media such as audio, video, and digital tapes.
About the Speaker:
Dr. David P. Pappas earned a BA in Physics in 1986 from the University of Colorado, Boulder, and PhD in Physics form the University of California, Irvine, in 1991. After postdoctoral work at Almaden Research Laboratory (San Jose, CA) and at the Naval Research Laboratory (Washington, DC), he served as an Assistant Professor at Virginia Commonwealth University from 1993-1997 where he was awarded a National Science Foundation Young Investigator Award and a Research Corporation Cottrell College Science Award. He left academia in 1997 to become the Project Leader for the Magnetic Sensors Quantum Devices Group, National Institute of Standards & Technology, Boulder, CO. He has published over 75 papers and given numerous invited presentations in the science. His current research interests are advanced materials for quantum computing applications, developing state of the art magnetic field sensors, and building real-time magnetic field imaging systems.