An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
First responders and incident management personnel need better training resources to prepare for future disasters. Live training exercises while valuable are
The effective use of modeling, simulation, and analysis (MSA) applications could greatly enhance our nation s ability to achieve homeland security goals. The
Katherine C. Morris, Puja Goyal, Simon P. Frechette
In enterprise integration, a data exchange specification is an architectural artifact that evolves along with the business. Developing and maintaining a
The throughput capacity of random wireless networks has been studied extensively in the literature. Nevertheless, most existing studies are based on the
Nathan R. Newbury, Paul A. Williams, William C. Swann
We have recently demonstrated the coherent transfer of an optical signal over a 251 km link of optical fiber using the standard Doppler-cancellation approach to
Walter G. McDonough, Gale A. Holmes, Jae Hyun Kim, Derek L. Ho
Research has indicated that the folding of ballistic fibers comprising soft body armor may be a factor in the performance deterioration that has been observed
We describe a simple method for observing high-contrast coherent population trapping signals on the Cs D 1 line. The high-contrast signals were achieved by use
Nanoelectronics require the introduction of several new uncharacterized material(s) combinations and new processing techniques. The critical metrology and
Nathan R. Newbury, Paul A. Williams, William C. Swann
We have recently demonstrated the coherent transfer of an optical signal over a 251 km link of optical fiber by use of the standard Doppler-cancellation
Presently we are in the development process for a 4 K Stirling-type pulse tube cryocooler to support cooling requirements for a mobile THz detector system. In
The explosive RDX (1,3,5-trinitrohexahydro-s-triazine) is thought to decompose by homolytic N-N bond cleavage, among other possible initiation reactions
Chin P. Cheng, Jiayi Pan, Gloria T. Lau, Kincho H. Law, Albert T. Jones
Increasingly, taxonomies are being developed for a wide variety of industrial domains and specific applications within those domains. These taxonomies attempt
The Institute of Electrical and Electronics Engineers (IEEE) 1451 family of standards defines a set of common communication interfaces for connecting smart
Radio resources in the third generation (3G) wireless cellular networks (WCNs) such as the universal mobile telecommunications system (UMTS) network is limited
Vehicular ad hoc network (VANET) is recognized as an important component of Intelligent Transportation Systems. The main benefit of VANET communication is seen
Due to the complexity and variability of capital construction sites, real-time monitoring remains an elusive goal. As unit price continues to fall, camera
Mahesh Mani, Kevin W. Lyons, Sudarsan Rachuri, Eswaran Subrahmanian, Ram D. Sriram
In response to the global trend towards implementing sustainable manufacturing practices, we put forth an exploratory approach that uses energy monitoring as a
Donald L. Hunston, Kar T. Tan, Christopher C. White
Filled viscoelastic solids, have been used for the last 40 years as building sealants to separate indoor from outdoor environments. The most important property
Lijun Ma, Hai Xu, Tiejun Chang, Oliver T. Slattery, Xiao Tang
We have experimentally implemented a differential phase shift quantum-key distribution system with up-conversion detectors operating at 2.5 Gbps clock rate. A
A detection-time-bin-shift scheme for polarization encoding QKD is proposed. This scheme can reduce cost and overcome the security loss caused by dead-time and
We present a Multi-sample Micro-capillary Rheometer (MMR) which is capable of measurements over a broad range of temperatures, viscosities and shear rates. The
Ian R. Coddington, William C. Swann, Nathan R. Newbury
A stabilized frequency comb provides a broadband array of highly resolved comb lines. Using a multiheterodyne technique, we measure the amplitude and phase of
Thomas Gerrits, Tracy S. Clement, Scott Glancy, Richard P. Mirin, Sae Woo Nam, Emanuel Knill
We show a method to increase the purity of a squeezed state generated by a femtosecond laser and down-conversion crystal. The method relies on temperature
Paul A. Williams, William C. Swann, Nathan R. Newbury
We present theory and experiment quantifying the limitations to stable transport of optical frequencies over optical fiber. These are fundamental fiber noise
We modulate the oscillator strength of self-assembled quantum dots embedded in a semiconductor ridge waveguide by applying an electric field with two coplanar
M Ledbetter, I Savukov, D Budker, Vishal Shah, Svenja A. Knappe, John Kitching, S Xu, D Michalak, A Pines
We demonstrate optical detection of nuclear magnetic resonance on a microchip. A theoretical optimization indicates detection limits that are competitive with
Christopher W. Meyer, Joseph T. Hodges, R W. Hyland, Gregory E. Scace, J Valencia-Rodriguez, James R. Whetstone
A new primary gravimetric hygrometer has been completed at the National Institute of Standards and Technology (NIST). This apparatus determines the humidity in