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.
In this paper we present a DSR-based multi-path Routing protocol, which has been developed for transmission of Multiple Description Coded (MDC) packets in...
V Shah, Svenja A. Knappe, Michael Rosenbluh, John E. Kitching
We demonstrate the excitation and low-noise detection of coherent population trapping (CPT) resonances with two modulated optical fields with orthogonal...
Society today has a wealth of information available due to information technology. The challenge facing researchers working in information access is how to help...
Ryan L. Parr, Jennifer Maki, Brian Reguly, Gabriel D. Dakubo, A A. Aguirre, Roy Wittock, Kerry Robinson, J P. Jakupciak, Robert E. Thayer
Nuclear mitochondrial pseudogenes (numts) are a potential source of contamination during mitochondrial DNA PCR amplification. This paper is the first to fully...
Terrell A. Vanderah, M W. Lufaso, A U. Adler, Igor Levin, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth
Subsolidus phase relations have been determined for the Bi-Mn-Nb-O system in air (750-900 C). Phases containing Mn2+, Mn3+, and Mn4+ were all observed. Ternary...
Martin A. Jaspan, Jonathan L. Habif, Sae Woo Nam, Robert Hadfield
Experiments involving entangled photon pairs created via spontaneous parametric down conversion typically use wavelengths in the visible regime. The extension...
The chelation dynamics of [5-C5H4C(O)R]Mn(CO)3 complexes 1 (R = CH2(SCH3)3), 2 (R = CH(SCH3)2), and 3 (R = C(SCH3)3) in room temperature acetonitrile solution...
Ronald L. Jones, T Hu, Christopher L. Soles, Eric K. Lin, R M. Reano, Stella W. Pang, D M. Casa
The real time shape of nanoimprinted polymer patterns are measured as a function of annealing temperature and time using a new metrology technique, Critical...
Martin Stevens, Robert Hadfield, Robert E. Schwall, Sae Woo Nam, Richard Mirin
We use a superconducting single-photon detector with less than 40 Hz dark count rate to measure spontaneous emission lifetimes of quantum wells emitting light...
A sevenfold enhancement of light extraction over a 130 nm bandwidth from a semiconductor at room temperature was achieved using circular Bragg gratings (CBGs)...
V Vaithyanathan, J Lettieri, W Tian, A Kochhar, H Ma, A Sharan, A Vasudevarao, J. A. Aust, Y Li, L Q. Chen, P Zschack, Joseph Woicik, J Levy, D G. Schlom
Windell Oskay, Scott A. Diddams, Elizabeth A. Donley, Tara M. Fortier, Thomas P. Heavner, Leo W. Hollberg, Wayne M. Itano, Steven R. Jefferts, M J. Jensen, Kyoungsik Kim, F Levi, Thomas E. Parker, James C. Bergquist
For the past fifty years, atomic frequency standards based on the cesium ground-state hyperfine splitting have been the most accurate timepieces in the world...
William E. Bailey, Stephen E. Russek, X.-G. Zhang, W. H. Butler
The magnitude of the electronic channeling contribution is a significant open issue in the understanding of giant magnetoresistance (GMR). We show that for the...
The concurrent goals of cement hydration are to percolate (bridge) the original cement particles into a load-bearing network and to depercolate (dam) the...
A three-story unreinforced brick building in Clinton, MO, collapsed on June 26, 2006 causing one fatality. The building was built in the 1880s. Two NIST...
We study stable propagation of multiple shape-preserving optical pulses in an inhomogeneously broadened multi-level atomic medium. By analytically solving the...
Donna C. Hurley, M Kopycinski-Muller, Eric Langlois, Anthony B. Kos, N. Barbosa
We have used contact-resonance-frequency atomic force microscopy techniques to nondestructively image variations in adhesion as a buried interface. Images were...
Donna C. Hurley, Malgorzata Kopycinska-Mueller, Eric Langlois, Tony B. Kos, Nicholas Barbosa
We demonstrate contact-resonance-frequency atomic force microscopy (AFM) techniques to nondestructively image variations in adhesion at a substrate/film...
We have measured the absolute radiant flux of synchrotron radiation as a function of the angle above and below the orbital plane with high accuracy at the...
H J. Kretzschmar, J Cooper, A Dittmann, J Trubenbach, Th Willkommen, Daniel G. Friend, J S. Gallagher, Radim Mares, Kiyoshi Miyagawa, Wolfgang Wagner, K Knobloch, I. Stocker
In 2001, the International Association for the Properties of Water and Steam (IAPWS) adopted backward equations for pressure as a function of enthalpy and...
Lili Wang, Kenneth D. Cole, Hua-Jun He, Diane K. Hancock, Adolfas K. Gaigalas, Y Zong
We employed ovalbumin (a simulant used for ricin and botulism toxins in biodefense applications) and its high affinity polyclonal antibody as a model system to...
Steven W. Brown, George P. Eppeldauer, Keith R. Lykke
Detectors have historically been calibrated for spectral power responsivity at the National Institute of Standards and Technology (NIST) using a lamp...
The form and stability of quantum vortices in Bose-Einstein condensates with attractive atomic interactions is elucidated. They appear as ring bright solitons...
Omololu Akin-Ojo, Allan H. Harvey, Krzysztof Szalewicz
We present our calculations of the cross second virial coefficient (B12) and of a related quantity, (phi)12 = B12 - TdB12/dT, for the methane?water system in...
S Sambasivan, S Hsieh, Daniel A. Fischer, Stephen M. Hsu
Friction at the nanoscale has become a significant challenge for microsystems, including MEMS, NEMS and other devices. At nanoscale, lateral loading often...
We investigate the influence of geometrical confinement on the breakup of long fluid threads in the absence of imposed flow using a Lattice Boltzmann model. Our...
The impact of Polyethyleneimine (PEI), a weak cationic polyelectrolyte, on the kinetics of copper deposition in the presence of additives used for superfill of...