U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 15576 - 15600 of 17286

Reexamination of the C2H3+ microwave and infrared spectra

September 29, 2011
Author(s)
Jon T. Hougen, Laurent H. Coudert
The high-resolution infrared spectrum of C2H3 recorded in the 3 CH stretching region (J. Phys. Chem. 99 (1995) 15611-15623) is re-analyzed using an effective internal axis method (IAM) accounting for the large amplitude hydrogen migration motion. The

Iris Quality Calibration and Evaluation (IQCE): Evaluation Report

September 24, 2011
Author(s)
Elham Tabassi, Patrick J. Grother, Wayne J. Salamon
Iris is rapidly gaining acceptance and support as a viable biometric. Several large scale identity management applications are either using or considering iris as their secondary or primary biometric for verification. While there are several academic

Revealing the Interphase in Polymer Nanocomposites

March 16, 2011
Author(s)
Mauro Zammarano, Paul H. Maupin, Li Piin Sung, Jeffrey W. Gilman, Douglas M. Fox
Morphological characterization of polymer nanocomposites is a fundamental challenge that is complicated by multiple length scales. Here, we report a technique for high-throughput monitoring of interphase and dispersion in polymer nanocomposites based on

Changing Optical Axis Due To Reactor Operation

January 12, 2011
Author(s)
Daniel S. Hussey, David L. Jacobson, Elias M. Baltic
… in the case of the reactor at the National Institute of Standards and Technology, this is determined by the angular …

Scientific Issues with Analysis of Low Amounts of DNA

September 7, 2010
Author(s)
John Butler, Becky Steffen
Faced with limited evidence that yield low amounts of DNA, forensic analysts will continually have to confront the question of how far to push DNA testing techniques. Low copy number (LCN) analysis, also known as low template DNA (LT-DNA) testing, involves

Spectroradiometric Calibration of Telescopes using Laser Illumination of Flat Field Screens

July 15, 2010
Author(s)
Steven W. Brown, Claire E. Cramer, Keith R. Lykke, Allan W. Smith, John T. Woodward IV, Peter Doherty, Emilio Falco, Christopher W. Stubbs
It is standard practice at many telescopes to take a series of flat field images prior to an observation run. Typically the flat field consists of a screen mounted inside the telescope dome that is uniformly illuminated with a broadband light source. These

WIND DRIVEN FIRES IN STRUCTURES

July 1, 2010
Author(s)
Daniel M. Madrzykowski, Stephen Kerber
… fighters ability to rescue them. The National Institute of Standards and Technology (NIST), in conjunction with the …

Strategies for Concordance Testing

May 1, 2010
Author(s)
Carolyn Steffen, David Duewer, Margaret C. Kline, John Butler
Concordance evaluations are important to conduct to determine if there are any allelic dropout or "null alleles" present in a data set. These studies are based on the fact that there are a variety of commercial short tandem repeat (STR) multiplex kits

CCQMK62: Nutrients in Infant/Adult Formula Vitamins

April 24, 2010
Author(s)
Katherine E. Sharpless, Catherine A. Rimmer, Karen W. Phinney, Bryant C. Nelson, David L. Duewer, Stephen A. Wise
Key Comparison CCQM-K62 was designed to enable demonstration of the equivalence in capabilities for measurement of vitamins in a food matrix. A milk-based fortified human infant/adult formula was selected as the matrix based upon material availability and

CCQMK62: Nutrients in Infant/Adult Formula Vitamins: Final Report

April 24, 2010
Author(s)
Katherine E. Sharpless, Catherine A. Rimmer, Karen W. Phinney, Bryant C. Nelson, David L. Duewer, Stephen A. Wise
Key Comparison CCQM-K62 was designed to enable demonstration of the equivalence in capabilities for measurement of vitamins in a food matrix. A milk-based fortified human infant/adult formula was selected as the matrix based upon material availability and

Microsensors in Dynamic Backgrounds: Toward Real-Time Breath Monitoring

January 15, 2010
Author(s)
Kurt D. Benkstein, Baranidharan Raman, Christopher B. Montgomery, C Martinez, Stephen Semancik
We evaluated MEMS microsensor array with chemi-resistive elements for use as a non-invasive clinical diagnostic tool to detect the presence or absence of trace amounts of disease biomarkers in simulated breath samples. The microsensor environment was

Quantum Key Distribution System Operating at Sifted-Key Rate Over 4 Mbit/s 1

June 1, 2009
Author(s)
Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Hai Xu, Barry J. Hershman, Joshua C. Bienfang, David H. Su, Ronald F. Boisvert, Charles W. Clark, Carl J. Williams
A complete fiber-based polarization encoding quantum key distribution (QKD) system based on the BB84 protocol has been developed at National Institute of Standard and Technology (NIST). The system can be operated at a sifted key rate of more than 4 Mbit/s

Measurement of formamidopyrimidines in DNA

December 15, 2008
Author(s)
Pawel Jaruga, Guldal Kirkali, Miral M. Dizdar
… and are commercially available to be used as internal standards for quantification. GC/MS with isotope-dilution …

Precision Measurement of the 29 Si, 33 S, and 36 Cl Binding Energies

October 16, 2008
Author(s)
Maynard S. Dewey, Ernest G. Kessler Jr., R Deslattes, H G. Borner, M Jentschel, C Doll, P Mutti
The binding energies of 29Si, 33S, and 36Cl have been measured with a relative uncertainty 0.65 x 10 -6 using a flat-crystal spectrometer. The unique features of these measurements are 1) nearly perfect crystals whose lattice spacing is known in meters, 2
Displaying 15576 - 15600 of 17286
Was this page helpful?