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.
George R. Jones Jr., Brian J. Pritchard, Randolph Elmquist
National Measurement Institutes (NMIs) participate in international key comparisons organized by the BIPM, the Regional Metrology Organizations (RMOs), or the
Jifeng Qu, Samuel Benz, Horst Rogalla, David R. White
The variance of temperature measurements made with the NIST Johnson noise thermometer has been reduced by use of improved cross-correlation electronics and a
G Peggs, P.G Maropoulos, E.B Hughes, Alistair Forbes, S Robson, M Ziebart, Bala Muralikrishnan
With ever-more demanding requirements for the accurate manufacture of large components, dimensional measuring techniques are becoming progressively more
Current methods to determine debonding/leakage at the tooth-composite interphase are qualitative or semi-quantitative. Our previous work introduced a 3D imaging
A new technology will be described which extends the cavity ring-down optical absorption technique to condensed matter by using a miniature, high-finesse
A new optical technique is described that permits extension of cavity ring-down spectroscopy (CRDS) to surfaces, films, and liquids. As in conventional CRDS
L.A. Akhmedova-Azizova, Ilmutdin M. Abdulagatov, Thomas J. Bruno
Thermal conductivity of rocket propellant (RP-1 fuel) has been measured with a coaxial-cylinder (steady-state) technique. Measurements were made in the
Robert G. Brinson, Kevin Turner, Hye Y. Yi-Brunozzi, Stuart F. Le Grice, Daniele Fabris, John P. Marino
During (-)-strand DNA synthesis in retroviruses and Saccharomyces cerevisiae LTR-retrotransposons, a purine rich region of the RNA template, known as the
Flow fields encountered in full-scale enclosure fires are highly three-dimensional and span over a large spatial extent. Stereoscopic Particle Image Velocimetry
David L. Duewer, Katrice A. Lippa, Stephen E. Long, Karen E. Murphy, Katherine E. Sharpless, Lorna T. Sniegoski, Michael J. Welch
Certified Reference Materials (CRMs) enable the meaningful comparison of measurement results over time and place. When CRMs are used to calibrate or verify the
Douglas A. Bennett, Robert D. Horansky, Joel N. Ullom
Complex impedance is an important and widely used technique for characterizing microbolometers and microcalorimeters. Often, complex impedance data from actual
Hermann Uys, Michael J. Biercuk, John J. Bollinger
One approach to maintaining phase coherence of qubits through dynamical decoupling consists of applying a sequence of Hahn spin-echo pulses. Recent studies have
Peter Yim, Matthew L. Clarke, Michael McKinstry, Silvia H. De Paoli Lacerda, Leonard F. Pease III, Marina A. Dobrovolskaia, Hyeong G. Kang, David T. Read, Shanmuga Sozhamannan, Jeeseong C. Hwang
We rapidly and quantitatively detect biological pathogens by combining the specificity of bacteriophage lambda with the sensitivity of CdSe/ZnS quantum dot (QD)
Ward L. Johnson, Sudook A. Kim, Zhandos Utegulov, B. T. Draine
Distributions of electric fields in two-dimensional arrays of gold nanodisks on a Si3N4 membrane, with light incident through the membrane, are modeled with the
Megan C. Wadington , Jane E. Ladner, N V. Stourman, Joel M. Harp, R N. Armstrong
YfcG is one of eight glutathione (GSH) transferase homologues encoded in the Escherichia coli genome. The protein exhibits low or no GSH transferase activity
Robert D. Horansky, James A. Beall, Kent D. Irwin, Joel N. Ullom
Improving the resolution of gamma-ray detectors is important for many fields, including determinations of the Lamb shift in atoms with high atomic numbers
Information theory places constraints on multiplexing large low-temperature detector arrays. We discuss these constraints, and review the state of the art of
During the course of the Reliable Information Access (RIA) workshop, a data archive was created to hold the outputs of the many experiments being done. This
David P. Pappas, Fabio Cesar Da Silva, Teresa Osminer, Sung Un Cho, Hyung Choi, Chan Yang, Yun Park
We report on the modification of magnetotransport properties across patterned GaMnAs nanoconstrictions by the application of high current densities (< 107 A/cm2
Steven T. Bushby, Michael A. Galler, Natascha S. Milesi-Ferretti, Cheol D. Park
Building emulators couple computer simulations to real control hardware, creating a useful tool for studying building control system performance. The National
Jason Hattrick-Simpers, Leonid A. Bendersky, Edwin J. Heilweil, H. Oguchi, Ichiro Takeuchi
We have refined and expanded on the capabilities of rapid screening, which utilizes infrared (IR) emissivity imaging. A complete procedure for using infrared
Ravikiran Attota, Richard M. Silver, Thomas A. Germer
We present a novel optical technique that produces nanometer dimensional measurement sensitivity using a conventional optical microscope, by analyzing through
Ian R. Coddington, William C. Swann, Nathan R. Newbury
Linear optical sampling characterizes a sample by measuring the distortions on a transmitted optical field, thereby quantifying the sample's optical response
Color rendering refers to a light sources ability to make the colors of illuminated objects appear natural or accurate. The Color Rendering Index (CRI) is
Azeotrope mixtures are among the most fascinating, and at the same time the most complicated manifestations of phase equilibrium. They are also a critical
Charles S. Tarrio, Steven E. Grantham, Robert E. Vest, Thomas B. Lucatorto
The National Institute of Standards and Technology (NIST) is active in many areas of metrology impacting extreme ultraviolet lithography. We will describe our
Thomas J. Bruno, Arron Wolk, Alexander Naydich, Marcia L. Huber
We have recently introduced several important improvements in the measurement of distillation curves of complex fluids. The modifications to the classical
W Bumrongjaroen, Richard A. Livingston, Dan A. Neumann, Andrew J. Allen
A combination of small-angle and inelastic neutron scattering studies are presented to elucidate the different effects of Class F and Class C fly ash additions
Joshua M. Pomeroy, John Read, Theodore White, Holger Grube, Joseph E. Davies
First order reversal curve (FORC) analysis is successfully applied to magnetic tunnel junctions (MTJs) by using the junction magneto-resistance (MR) instead of