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.
Surface roughness can affect cell adhesion, morphology, proliferation and differentiation. Since polymeric biomaterials can inherently exhibit nanometer-scale...
When analyzing GPS carrier-phase time transfer (GPSCPTT) data, it is often necessary to estimate the zenith troposphere delay (ZTD) at each site as a function...
David Mills, Judah Levine, Richard Schmidt, David Plonka
The public time servers operated by USNO and NIST provide time synchronization, directly or indirectly, to millions of Internet computers today. The load in the...
The International Bureau of Weights and Measures (BIPM) calculates International Atomic Time (TAl) and Coordinated Universal Time (UTC) using data from many...
Svenja A. Knappe, P Schwindt, Vladislav Gerginov, V Shah, Leo W. Hollberg, John E. Kitching, Li-Anne Liew, John Moreland
In this paper we present the latest progress in the development, fabrication, and characterization of a microfabricated atomic frequency reference at NIST. With...
Ultra-low noise microwave oscillators are often required to serve as reference signals in precision PM noise measurement systems and in a host of other...
This paper discusses the use of ultra-widehand radio signals near 5 GHz to detect moisture problems within building assemblies. Ultra-widehand signals are made...
Daniel M. Madrzykowski, Nelson P. Bryner, William L. Grosshandler, D W. Stroup
As part of its technical investigation of the fire that occurred in a Rhode Island, USA nightclub in February, 2003, NIST has conducted real-scale experiments...
This paper discusses the use of ultra-wideband radio signals to detect moisture problems within building assemblies. Ultra-wideband signals are made up of a...
The n-qubit concurrence canonical decomposition (CCD) is a generalization of the two-qubit canonical decomposition SU(4)=[SU(2) (x) SU(2)] ? [SU(2) (x) SU(2)]...
Pharmaceutical steroids are known to differ in isotopic composition from those produced naturally in the body. By measuring the 13 C/ 12C ratio of specific...
The National Software Reference Library (NSRL) of the U.S. National Institute of Standards and Technology (NIST) collects software from various sources and...
Our results extending Kuhn's fault class hierarchy provide a justification for the focus of fault-based testing strategies on detecting particular faults and...
Michael McKinley, Kate Remley, Maciej Myslinski, J. S. Kenney
We present a normalization that facilitates calculation of error vector magnitude (EVM) from measurements. We derive the IEEE 802.11a standard's EVM from a more...