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 26 - 50 of 1911

High-Resolution Photocurrent Microscopy Using Near-Field Cathodoluminescence of Quantum Dots

June 10, 2013
Author(s)
Heayoung Yoon, Youngmin Lee, Christopher C. Bohn, Seung H. Ko, Anthony G. Gianfrancesco, Jonathan S. Steckel, Seth Coe-Sullivan, Albert A. Talin, Nikolai B. Zhitenev
… the new technique, termed Q-EBIC (EBIC using quantum dot phosphor), is determined by the absorption depth of photons, … electron beam, quantum dot, phosphor, cathodoluminescence, photocurrent, CdTe …

Optimization Calculations for a 30 HZ, 4 K Regenerator with Helium-3 Working Fluid

June 28, 2009
Author(s)
Ray Radebaugh, Yonghua Huang, Agnes A. O'Gallagher, John M. Gary
… second law efficiencies of 4 K regenerators operating at 30 Hz. Operating parameters, such as average pressure, … uses layered GOS and ErPr with the warm end at about 30 K and an average pressure of about 1.0 MPa. With those … OPTIMIZATION CALCULATIONS FOR A 30 HZ, 4 K REGENERATOR WITH HELIUM-3 WORKING FLUID …

Final report of the key comparison CCQM-K98: Pb isotope amount ratios in bronze

July 1, 2014
Author(s)
Jochen Vogl, Yong-Hyeon Yim, Kyoung-Seok Lee, Heidi Goenaga-Infante, Dmitriy Malinowskiy, Tongxiang Ren, Jun Wang, Robert D. Vocke Jr., Karen E. Murphy, Naoko Nonose, Olaf Rienitz, Janine Noordmann, Teemu Naeykki, Timo Sara-Aho, Bet?l Ari, Oktay Cankur
… the measurement of Pb isotope amount ratios in water and bronze. Measuring Pb isotope amount ratios in an aqueous Pb … the whole chemical and instrumental procedure. A suitable bronze material with a Pb mass fraction between 10 and 100 … the key comparison CCQM-K98: Pb isotope amount ratios in bronze …

The Impact of Bromine- and Phosphorous-Based Flame Retardants on Flame Stability and Heat Feedback from Laminar Wall Flames

May 4, 2019
Author(s)
Isaac T. Leventon, Stanislav I. Stoliarov, Roland H. Kraemer
… used to quantify the mechanisms of action of bromine- and phosphorous-based flame retardants. Here, a series of … with increasing amounts (8, 12, 16, and 20 wt %) of the phosphorous-based flame retardant, aluminum … and heat of combustion, and indicate that bromine- and phosphorous-based flame retardants (at least at the …

Whisker Formation in Pb-Free Surface Finishes

September 11, 2006
Author(s)
Gery R. Stafford, Maureen E. Williams, C E. Johnson, Kil-Won Moon, Ugo Bertocci, William J. Boettinger
… 3,7 and 16 microns thick were electrodeposited onto phosphor bronze cantilever beams in a rotating disk apparatus. Beam … is augmented by the formation of Cu_{6}Sn_{5} on the bronze/Sn interface, while creep of the electrodeposit tends …

Whisker & Hillock Formation on Sn, Sn-Cu and Sn-Pb Electrodeposits

November 11, 2005
Author(s)
William J. Boettinger, C E. Johnson, Leonid A. Bendersky, Kil-Won Moon, Maureen E. Williams, Gery R. Stafford
… layers, 3, 7 and 16 mm thick were electrodeposited on phosphor bronze cantilever beams in a rotating disk apparatus. Over a … creep and the formation of a Cu(sub 6)Sn(sub 5) on the bronze/Sn interface that respectively decrease and slightly …

MatML Version 3.0 - Schema

January 1, 2003
Author(s)
E F. Begley
… contains the formal specification of MatML Version 3.0 - Schema in World Wide Web Schema Definintion Language … SIMA proposals regarding the development of MatML Version 3.0 - Schema. … MatML Version 3.0 - Schema …

Screening Candidates for 30 nm Spheres

August 1, 2006
Author(s)
Michelle K. Donnelly, Jiann C. Yang
… to be used as the NIST Standard Reference Material (SRM) 30 nm spheres. Five different samples were obtained and … distribution and a preliminary peak particle diameter of 30.1 nm was identified as a potential candidate to become the NIST 30 nm SRM. A secondary candidate, with a fairly narrow …

'Passwords Keep Me Safe' - Understanding What Children Think about Passwords

August 11, 2021
Author(s)
Mary Theofanos, Yee-Yin Choong
Children use technology from a very young age, and often have to authenticate. The goal of this study is to explore children's practices, perceptions, and knowledge regarding passwords. Given the limited work to date and that the world's cyber posture and

Evaluation of the Range Performance of Laser Scanners Using Non-planar Targets.

November 1, 2015
Author(s)
Prem K. Rachakonda, Balasubramanian Muralikrishnan, Craig M. Shakarji, Vincent D. Lee, Daniel S. Sawyer
The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) is supporting the development of documentary standards for performance evaluation of Laser scanners. This evaluation could be performed by determining the

Subsolidus Phase Equilibria and Crystal Chemistry in the System BaO-TiO 2 -Ta 2 O 5

January 1, 2003
Author(s)
Terrell A. Vanderah, Robert S. Roth, T Siegrist, W Febo, J. M. Loezos, Winnie K. Wong-Ng
… [Ba,O] layer structures related to that of 6L Ba 4 Ti 13 O 30 were found: 13L Ba 18 Ti 53 Ta 2 O 129 , 7Lba 10 Ti 27 Ta … O 129 : cchcchcchcchc, C2/m, a=9.859(2) , b=17.067(5) , c=30.618(8) , Β=96, 11(2) , Z=2; 7L Ba 10 Ti 27 Ta 2 O 69 : … 8L members of this family. Phases with tetragonal tungsten bronze related structures occur over large compositonal …

Multifilmamentary Nb 3 Sn wires reacted in hydrogen gas

May 1, 2002
Author(s)
M Takayasu, R G. Ballinger, Ronald B. Goldfarb, A. A. Squitieri, P. J. Lee, David C. Larbalestier
… the hydrogen reaction on the superconductive properties of bronze-process and internal-tin-process Nb 3 Sn wires were … in partial vacuum, critical currents decreased in the bronze wire by 12% at 12 T and 14% at 5 T, and in the … losses over a ±3 T field cycle were reduced by 14% for the bronze wire and by 8% for the internal-tin wire by the …

Distribution and Retention of 137 Cs in Sediments at the Hanford Site, Washington

September 1, 2001
Author(s)
J P. McKinley, Cynthia J. Zeissler, J M. Zachara, R J. Serne, Richard M. Lindstrom, H T. Schaef, R D. Orr
… with smectite and kaolinite in the clay-size fraction. A phosphor-plate autoradiograph method was used to identify … environmental radioactivity, micaceous sediment leaching, phosphor imaging plates PSL, soil contamination, sorption …

Design and calibration of an artifact for evaluating laser scanning articulating arm CMMs used for measuring complex non-concurrent surfaces

October 30, 2015
Author(s)
Vincent D. Lee, Steven D. Phillips, Craig M. Shakarji, Jeffrey Hosto, Jeffrey Huber, Gillich Barbara
Dimensional metrology is a foundational science finding applications throughout modern technology, including the testing of human-worn body armor designed to mitigate damage from kinetic projectiles fired from small arms. We describe the design and
Displaying 26 - 50 of 1911
Was this page helpful?