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 12451 - 12475 of 13226

NIST Micronutrients Measurement Quality Assurance Program Winter, Spring, and Fall 1995 Comparability Studies: Results for Round Robins XXXIII, XXXIV, and XXXV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robins 7 and 8 Ascorbic Acid in H

April 25, 2014
Author(s)
David L. Duewer, Margaret C. Kline, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
… The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality … measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes the design … 1) Round Robin XXXIII Fat-Soluble Vitamins and Carotenoids in Human Serum, 2) Round Robin XXXIV Fat-Soluble Vitamins and …

A Methodology for Developing Authentication Assurance Level Taxonomy for Smart Card-based Identity Verification

March 5, 2014
Author(s)
Ramaswamy Chandramouli
… verification for controlling access to Information Technology (IT) resources as well as physical resources. … of pair wise bindings between the five entities involved in smart card based authentications--the card (token), the … holder, the card issuer, and the person identifier stored in the card. The rationale for the methodology is based on …

Stair Evacuation of People with Mobility Impairments

March 3, 2014
Author(s)
Erica D. Kuligowski, Richard Peacock, Bryan Hoskins, Emily Wiess
… geometry, speed, density, and pre-evacuation delay. In turn, engineering models of building evacuation use these … other data collected on mobility-impaired individuals. In the current study, the National Institute of Standards and Technology observed overall average speeds of (0.31 ± 0.16) …

Three-Corner Hat Analysis of the Stability of UTC and Various UTC(k)s

December 5, 2013
Author(s)
Thomas E. Parker
… the best local UTC(k)'s, as well as UTC itself. Included in this analysis using data from Circular T are the local … UTC(USNO), the National Institute of Standards and Technology, UTC( NIST), the Paris Observatory, UTC(OP), and in Germany, UTC(PTB). All local UTC(k)'s are of course …

Morphing Metal-Polymer Janus Particles

October 25, 2013
Author(s)
Lewis M. Cox, Jason Killgore, Zhengwei Li, Zheng Zhang, Donna C. Hurley, Jianliang Xiao, Yifu Ding
… to Janus-particles, already enjoy wide interest in their uses in drug delivery, electronic packaging, optical bio- sensors, … programming of large compressive engineering strains in crosslinked polymer microparticles via nanoimprint …

Using a Saturation Function to Interpret the Electrical Properties of Partially Saturated Concrete

August 29, 2013
Author(s)
William J. Weiss, Kenneth A. Snyder, Jeffrey W. Bullard, Dale P. Bentz
… Electrical properties are frequently measured in the concrete construction industry as a part of mixture … increase the degree of hydration of the test sample in comparison to that of concrete in field structures (when … and 4) it may enable a wider use of embedded sensor technology. …

An Assessment of 25-Hydroxyvitamin D Measurements in Comparability Studies Conducted by the Vitamin D Metabolites Quality Assurance Program

August 12, 2013
Author(s)
Mary Bedner, Katrice A. Lippa, Susan Tai
… Background: The National Institute of Standards and Technology (NIST), in collaboration with the National Institutes of Health … (CV) for the participant results was consistently in the range from 7% to 19%, and the median values were … An Assessment of 25-Hydroxyvitamin D Measurements in Comparability Studies Conducted by the Vitamin D …

Propagation Models for IEEE 802.15.6 Standardization of Implant Communication in Body Area Networks

August 1, 2013
Author(s)
Kamran Sayrafian, RA?L CH?VEZ-SANTIAGO , KENICHI TAKIZAWA , JIANQING WANG , ILANGKO BALASINGHAM, HUAN-BANG LI
… wireless communication for use on the surface, inside, or in the peripheral proximity of the human body. Combined with … signals. Therefore, it is regarded as an important technology for the treatment and prevention of chronic … Standards Committee (LMSC) approved the task group TG15.6 in December 2007. As a result of more than four years of …

Paving the Way for a More Sustainable Concrete Infrastructure: A Vision for Developing a Comprehensive Description of Cement Hydration Kinetics

March 28, 2013
Author(s)
Joseph J. Biernacki, Jeffrey W. Bullard, Constantiner Constantiner, Richard Meininger, Maria Juenger, Josephine H. Cheung, William Hansen, R. D. Hooton, Andreas Luttge, Jeffrey J. Thomas
… of the process responsible for microstructure development in concrete and ultimately controls the kinetics of all … control of concrete properties. Recent advances both in experimental and in computational technology are providing unprecedented insights into the …

Evaluation of Pacific White Shrimp (Litopenaeus vannamei) Health During a Superintensive Aquaculture Growout using NMR-based Metabolomics

March 27, 2013
Author(s)
Tracey B. Schock, Dan Bearden, Jessica Duke, Abby Goodson, Daryl Weldon, Jeff Brunson, John Leffler
… provides nutrition for the farmed organisms resulting in improved growth, and reduces disease initiated from … full growout cycle from the nursery phase through harvest in a minimal-exchange, superintensive, biofloc system. … detected aberrant shrimp metabolomes from a spike in total ammonia nitrogen in the nursery, from a reduced …

Development of a Reference Material for Building Product Emissions Testing

February 4, 2013
Author(s)
Cynthia H. Reed, Zhe Liu, Steve Cox, Andrew K. Persily, John Little
… measurements, the National Institute of Standards and Technology (NIST) and Virginia Tech (VT) have collaborated to … to include other chemicals. The use of reference materials in product emissions testing has the potential to provide an … validation approach that can instill more confidence in product labeling programs. …

Single photon frequency up-conversion and its applications

October 12, 2012
Author(s)
Lijun Ma, Oliver T. Slattery, Xiao Tang
… The National Institute of Standards and Technology (NIST) has adapted a frequency up-conversion … single photon up-conversion detectors and spectrometer in a variety of pioneering research projects including the … a direct spectrum measurement for photons generated in spontaneous parametric down-conversion (SPDC); the …

Evaluating Potential Bias in Non-Randomly Reported Fire Incident Data

September 26, 2012
Author(s)
David T. Butry, Douglas S. Thomas
… understanding the root causes of the total burden of fire in the United States. They will be used to develop … the ‘representativeness’ of fire incident data reported in the National Fire Incident Reporting System (NFIRS) to depict fire activity in non-reporting cities; (2) to test (statistically) for …

A Restricted English for Constructing Ontologies (RECON)

July 10, 2012
Author(s)
Edward J. Barkmeyer Jr., Andreas K. Mattas
… domain of work requires the contributions of experts in the domain. Conversely, use of automated reasoning technologies to assist in making industry decisions and validating industry … that facts, rules and the definitions of terms be stated in a formal logic language. Such languages are very difficult …

PV-MCT working standard radiometer

April 24, 2012
Author(s)
George P. Eppeldauer, Vyacheslav B. Podobedov
… dynamic range of the National Institute of Standards and Technology (NIST) pyroelectric transfer-standards used for … structure produced a spatial non-uniformity in the detector response. The PV-MCT radiometer was …

Can We Get 3D CD Metrology Right?

April 19, 2012
Author(s)
Andras Vladar, John S. Villarrubia, Michael T. Postek, Petr Cizmar
… are the integrated circuits (ICs), they have always been. In the past, for a long time, we’ve been very fortunate, … under acceptable control. This requirement has changed in a few years to contour and now to three-dimensional … (3D) metrology is now indispensable for IC technology, but current metrology tools and methods cannot …

Latent Print Examination and Human Factors: Improving the Practice through a Systems Approach

February 17, 2012
Author(s)
Melissa Taylor, David H. Kaye, Thomas Busey, Melissa Gische, Gerry LaPorte, Colin Aitken, Susan M. Ballou, Leonard Butt, Christophe Champod, David Charlton, Itiel E. Dror, Jules Epstein, Robert J. Garrett, Max Houck, Edward J. Imwinkelried, Ralph Keaton, Glenn Langenburg, Deborah A. Leben, Alice Maceo, Kenneth F. Martin, Jennifer L. Mnookin, Cedric Neumann, Joe Polski, Maria A. Roberts, Scott A. Shappell, Lyle Shaver, Sargur N. Srihari, Hal S. Stern, David Stoney, Anjali Swienton, Mary Theofanos, Robert M. Thompson, John Vanderkolk, Maria Weir, Kasey Wertheim
… have provided a valuable method of personal identification in forensic science and criminal investigations for more than … of the latent print to a known (or exemplar) print. In addition to reaching correct conclusions in the matching … 2008, the U.S. National Institute of Standards and Technology (NIST) convened The Expert Working Group on Human …

Overall and Local Movement Speeds During Fire Drill Evacuations in Buildings up to 31 Stories

February 4, 2012
Author(s)
Richard D. Peacock, Bryan L. Hoskins, Erica D. Kuligowski
… geometry, speed, density, and pre-evacuation delay. In turn, predictive models of building evacuation use these … Laboratory at the National Institute of Standards and Technology (NIST) has been collecting stairwell movement data … To date, NIST has collected fire drill evacuation data in 8 office building occupancies ranging from six to 31 …

Preparation and Value Assignment of Standard Reference Material 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum

January 2, 2012
Author(s)
Jeanice M. Brown Thomas, David L. Duewer, Lane C. Sander, Katherine E. Sharpless, Lorna T. Sniegoski, Michael J. Welch, James H. Yen, Mugenya O. Isaac
… 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum provides certified values for total retinol, … total β-cryptoxanthin, total β-carotene, and cholesterol in human serum. Values are also reported for nine additional … methods used at the National Institute of Standards and Technology (NIST) and from the median of results from an …

Self-Repairing Complex Helical Columns Generated via Kinetically Controlled Self-Assembly of Dendronized Perylene Bisimides

November 16, 2011
Author(s)
Virgil Percec, Steven Hudson, Mihai Peterca, Pawaret Leowanawat, Emad Aqad, Robert Graf, Hans -. Spiess, Xiangbing Zeng, Goran Ungar, Paul A. Heiney
… (3,4,5)12G1-3-PBI was recently shown to self-assemble in a complex helical column containing tetramers of PBI as … of two molecules arranged side-by-side and another pair in the next stratum of the column, turned upside-down and … self-assemble via a thermodynamically controlled process in a 2D hexagonal columnar phase while at low temperature in …

Measuring the Impact of Engineering Research Publications

June 12, 2011
Author(s)
Stacy M. Bruss, Susan L. Makar
… Office (ISO) of the National Institute of Standards and Technology (NIST) recently conducted a study to assess the … NIST engineering and similar research groups who publish in the non-journal literature. This poster will illustrate ISO’s methodologies and results in using Google Scholar to help engineering researchers both …

Electromigration of Cu Interconnects Under AC and DC Test Conditions

May 15, 2011
Author(s)
Robert R. Keller, David T. Read, Roey Shaviv, Greg Harm, Sangita Kumari
… Electromigration of a 65 nm technology generation test vehicle was measured using DC, AC … three rectangular wave DC stressing conditions at 598 K. In some of the experiments samples were allowed to cool to … conditions. Thermal history of the EM test samples, and in particular cooling to room temperature, had no effect on …
Displaying 12451 - 12475 of 13226
Was this page helpful?