Volume 17, Number 2

17-2 cover

Lab Notes

Looking Back

A Novel Method for Remotely Detecting Trace Explosives
By Charles M. Wynn, Stephen Palmacci, Roderick R. Kunz, and Mordechai Rothschild

The development of a technique with the ability to detect trace quantities of explosives at a distance is of critical importance. In numerous situations when explosive devices are prepared, transported, or otherwise handled, quantifiable amounts of the explosive material end up on surfaces. Rapid detection of these chemical residues in a noninvasive standoff manner would serve as an indicator for attempts at concealed assembly or transport of explosive materials and devices. We are investigating the use of a fluorescence-based technique to achieve the necessary detection sensitivity.

A Comprehensive Aircraft Encounter Model of the National Airspace System 
By Mykel J. Kochenderfer, Leo P. Espindle, James K. Kuchar, and J. Daniel Griffith

Collision avoidance systems play an important role in the future of aviation safety. Before new technologies on board manned or unmanned aircraft are deployed, rigorous analysis using encounter simulations is required to prove system robustness. These simulations rely on models that accurately reflect the geometries and dynamics of aircraft encounters at close range. These types of encounter models have been developed by several organizations since the early 1980s. Lincoln Laboratory’s newer encounter models, however, provide a higher-fidelity representation of encounters, are based on substantially more radar data, leverage a theoretical framework for finding optimal model structures, and reflect recent changes in the airspace.

Automatic Dependent Surveillance-Broadcast in the Gulf of Mexico  
By Steven D. Thompson and Katherine A. Sinclair

The Federal Aviation Administration is adopting Automatic Dependent Surveillance–Broadcast (ADS–B) to provide surveillance in the National Airspace System (NAS). Aircraft separation services are currently provided by a system of en route and terminal radars, and the performance of these radars in part dictates the separation distance required between aircraft. ADS–B is designed to provide comparable service in areas where no radar coverage exists. It will eventually be the primary surveillance source in the NAS, if it is proven to provide performance equal to or better than radar.

New Methods to Transport Fluids in Micro-Sized Devices 
By Shaun Berry and Jakub Kedzierski

Applications of microfluidics require a self-contained, active pumping system in which the package size is comparable to the volume of fluid being transported. Over the past decade, several systems have been developed to address this issue, but either these systems have high power requirements or the microfabrication is too complex to be cost efficient. A recent effort at Lincoln Laboratory using an emerging technology called electrowetting has led to the development of several novel micropump concepts for pumping liquids continuously, as well as for pumping discrete volumes.

Lab Notes

Looking Back

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