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The 2004 NIST interoperability cost study estimated an annual cost burden of $15.8 billion due to inadequate interoperability in the capital facilities segment
The NIST Construction Metrology and Automation Group (CMAG) has ongoing research in the application of laser imaging technologies in construction. Previous work
One technique traditionally used to measure the directivity index of hearing aids involves acquiring data with sound source locations (at multiple azimuth
K Verspoor, O Bodenreider, P Karp, H Kelly, S Loranger, M Musen, Ram D. Sriram, C Wroe, C Joslyn, J Ambrosiano
Bio-threats require rapid analysis and response to prevent widespread consequences to the population. The inability to easily link and exploit biological
Y J. Son, Boonserm Kulvatunyou, Hyunbo Cho, Shaw C. Feng
To cope with today?s fluctuating markets, a virtual enterprise (VE) concept can be employed to achieve the cooperation among independently operating enterprises
The simulation-based training systems that are available or under development today for incident management are typically focused on macro level sequence of
A tool kit being developed at the National Institute of Standards and Technology (NIST)encodes XML schema Naming and Design Rules in a computer-interpretable
Robert Keller, Cynthia A. Volkert, Roy H. Geiss, Andrew Slifka, David T. Read, Nicholas Barbosa, Reiner Monig
We describe the use of electrical methods for evaluating mechanical reliability and properties of patterned copper and aluminum interconnects on silicon
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the
Given the relatively limited coverage area of 802.11 access points, stations moving inside WLAN are often required to perform a handover. The time needed for a
Cavity resonators are often used in low phase noise oscillators that utilize carrier suppression. These oscillators are employed in systems that measure phase
Eugene N. Ivanov, John J. McFerran, Scott A. Diddams, Leo W. Hollberg
We discuss various aspects of high resolution phase noise measurements at microwave frequencies. This includes methods to achieve thermal noise limited
Michael A. Lombardi, Andrew N. Novick, Victor S. Zhang
Global Positioning System Disciplined Oscillators (GPSDOs) are now the primary standard of time and frequency at many laboratories and calibration facilities
Vladislav Gerginov, Svenja A. Knappe, P Schwindt, V Shah, Li-Anne Liew, John Moreland, Hugh Robinson, Leo W. Hollberg, John E. Kitching, Alan Brannon, J Breitbarth, Z Popovic
We demonstrate component-level functionality of the three critical subsystems for a chip-scale atomic clock: the physics package, the local oscillator and the
Thomas P. Heavner, Steven R. Jefferts, Elizabeth A. Donley, F Levi, Thomas E. Parker
We present the design and measurements of the microwave synthesis chain presently used in NIST-F1, the laser-cooled cesium fountain primary frequency standard
All-in-view time transfer is being considered to replace common-view for computing the links of International Atomic Time (TAI). Components in all-in-view GPS
Michael A. Lombardi, Andrew N. Novick, Jose M. Lopez, Jean-Simon Boulanger, Raymond Pelletier
The Inter-American Metrology System (SIM) consists of national metrology institutes in 34 member nations located throughout North, Central, and South America
Two-Way Satellite Time and Frequency Transfer (TWSTFT) has become an important component in the international system for comparing time and frequency over long
Steven R. Jefferts, Jon H. Shirley, Neil Ashby, Thomas P. Heavner, Elizabeth A. Donley, F Levi
We show that the frequency bias caused by distributed cavity phase has a strong dependence on microwave power. We also show that frequency biases associated
Elizabeth A. Donley, Thomas P. Heavner, John O'Brien, Steven R. Jefferts, F Levi
We have successfully cooled and launched cesium atoms in the (1,1,1) atomic fountain geometry at temperatures as low as 0.8 mK. This corresponds to a mean
Efficiencies of regenerative cryocoolers are influenced by losses within the pressure oscillator (compressor). An evaluation of these losses is important when