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NIST Authors in Bold

Displaying 7026 - 7050 of 13218

Calibration

October 2, 2019
Author(s)
Lane C. Sander
… In the context of chemical metrology, calibration is the … Calibration permits the assignment of analyte levels in unknown samples based on the known levels of the … accurate results. Several common approaches are used in calibrating methods. Most frequently, calibration models …

Improving Reproducibility in Research: The Role of Measurement Science

September 18, 2019
Author(s)
Robert J. Hanisch, Anne L. Plant, Ian Gilmore
… 2018 at the National Physical Laboratory, Teddington, UK in which the focus was how the national metrology institutes of the world might help to address challenges in reproducibility of research. The workshop brought together … measurement practice and principles can foster confidence in research findings [1, 2, 3], including how we can tackle …

Microwave Monitoring of Atmospheric Corrosion of Interconnects

December 28, 2018
Author(s)
Papa Amoah, Dmitry Veksler, Christopher E. Sunday, Stephane Moreau, David Bouchu, Yaw S. Obeng
… nano scale; thus, new metrology and techniques are needed. In this paper, we use microwave propagation characteristics … ECS Journal of Solid State Science and Technology …

Operating Hydrogen Gas Transmission Pipelines at Pressures above 21 MPa

November 12, 2018
Author(s)
Andrew Slifka, Elizabeth S. Drexler, Robert L. Amaro, Peter Bradley, Damian Lauria
… dozens of fatigue crack growth tests conducted in hydrogen gas pressurized up to 21 MPa with an upper … Journal of Pressure Vessel Technology-Transactions of the ASME …

On the Development of a Hydrogen-Assisted Fatigue Crack Growth Model for API Pipeline Steels

April 5, 2018
Author(s)
Andrew J. Slifka, Ryan M. White, Chris P. Looney, Elizabeth S. Drexler, Robert L. Amaro
… partial solution to the need for a clean energy economy. In order to make this a reality, large-scale hydrogen … data and models pertaining to steels’ fatigue response in gaseous hydrogen. Extensive research at NIST has been performed in conjunction with the ASME B31.12 Hydrogen Piping and …

Fatigue measurement of pipeline steels for application of gaseous hydrogen transport

February 5, 2018
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Robert L. Amaro, Louis E. Hayden, Damian S. Lauria, Nikolas W. Hrabe, Douglas G. Stalheim
… determine the fatigue crack growth rate of pipeline steels in pressurized hydrogen gas was completed; the project was … by the Department of Transportation, and was conducted in close collaboration with the ASME B31.12 Committee on … shown that loss of ductility correlates with an increase in yield strength. The X70 materials performed on par with …

Broadband Dielectric Spectroscopic Characterization of Thermal Stability of Low-k Die-lectric Thin Films for Micro- and Nanoelectronic Applications

August 29, 2017
Author(s)
Christopher E. Sunday, Papa Amoah, Karl Montgomery, Yaw S. Obeng
… In this paper, we discuss the use of broadband microwaves … thin films meant for insulation applications in micro- and nanoelectronic devices. We take ad-vantage of … thermal-induced performance and reliability changes with-in the dielectric films. These changes are then correlated …

Form Factors for Branched Polymers with Excluded Volume

April 13, 2016
Author(s)
Boualem Hammouda
… for dendrimers with excluded volume is also calculated. In order to evaluate the form factor for stars with looping … the looping branches. Analytical results are possible in the Gaussian chain case (i.e., with no excluded volume), but the calculations are left in a form involving summations over monomers in the general …

Certification of NIST Room Temperature Low-Energy and High-Energy Charpy Verification Specimens

December 2, 2015
Author(s)
Enrico Lucon, Christopher N. McCowan, Raymond Santoyo
… lots of steel on the three master Charpy machines located in Boulder, CO. The statistical analyses performed show that in most cases the variability of results (i.e., the … removes from the verification process the operator's skill in transferring the specimen in a timely fashion from the …

Electrodeposition of gold to conformally fill high-aspect-ratio nanometric silicon grating trenches: a comparison of pulsed and direct current protocols

October 1, 2015
Author(s)
sami Znati, N Chedid, Houxun Miao, Lei Chen, Han Wen, Eric E. Bennett
… trenches with gold is a frequent requirement in the fabrication of X-ray optics as well as … fabrication processes. Conformal electrodeposition of gold in sub-micron-width silicon trenches with an aspect ratio … centimeters is challenging and has not been described in the literature previously. A comparison of pulsed plating …

Broad-Band Microwave-Based Metrology Platform Development: Demonstration of In-Situ Failure Mode Diagnostic Capabilities for Integrated Circuit Reliability Analyses

November 7, 2014
Author(s)
Lin You, Chukwudi A. Okoro, Jungjoon Ahn, Joseph Kopanski, Yaw S. Obeng, Rhonda R. Franklin
… In this paper, we discuss the use of broadband high frequency … classify and characterize performance-limiting defects in emerging nanoelectronic devices. As an illustration, the … is used to infer thermo-mechanical stress-induced defects in metal interconnects. The inferred defects are supported …

Near-Field Scaning Microwave Microscope (NSMM)

December 31, 2012
Author(s)
Atif A. Imtiaz, Thomas M. Wallis, Pavel Kabos
… Electromagnetic waves in the microwave frequency range are an essential tool for … materials, among others. These materials are studied in multiple scales, including bulk, thin film and ideally … McGraw Hill Encyclopedia for Science and Technology (2013) …

ASME B89.4.19 Performance Evaluation Tests and Geometric Misalignments in Laser Trackers

January 30, 2009
Author(s)
Balasubramanian Muralikrishnan, Daniel S. Sawyer, Christopher J. Blackburn, Steven D. Phillips, Bruce R. Borchardt, William T. Estler
… and eccentricity of the mechanical and optical components in laser trackers introduce systematic errors in the measured spherical coordinates (angles and range readings), and possibly in the calculated lengths of reference artifacts. It is … of Research of the National Institute of Standards and Technology …

Workshop on Measurement Needs for Local-Structure Determination in Inorganic Materials

November 8, 2008
Author(s)
Igor Levin, Terrell A. Vanderah
… NIST-sponsored workshop was to bring together experts in the key experimental and theoretical areas relevant to … solving the nanostructure problem an ultimate frontier in materials characterization necessitates a coordinated … and maintaining relevant computer software integrated in an open-source global optimization framework (Fig. 2), (2) …

A New International Evaluation of the Neutron Cross Section Standards

October 16, 2008
Author(s)
Allan D. Carlson
… cross section, which is used as a standard cross section in the NEANDC/INDC NuclearStandards File, were evaluated. … that evaluation was completed which will causechanges in a new evaluation of the standards. International efforts … an improved evaluation procedure compared with that used in ENDF/B-VI. The status of the workon this evaluation will …

Neutron Reflectivity for Interfacial Materials Characterization

October 16, 2008
Author(s)
Eric K. Lin, D J. Pochan, R Kolb, Wen-Li Wu, Sushil K. Satija
… such as the coefficient of thermal expansion (CTE), in thin films and at interfaces are very important in microelectronics packaging and interconnection, especially as electronic devices decrease in size and interfaces become a larger proportion of the … Conference on Characterization and Metrology for ULSI Technology …

Self-Synchronizing Ergodic Maps and Chaotic Modulation

October 16, 2008
Author(s)
D G. Sterling
… synchronous state to noise. Using two separate time scales in conjunction with a digital filter supresses the noise in the coupling signal. We find this gives stable synchronous … IEEE Transactions on Circuits and Systems for Video Technology …

Long-term Stability of the NIST Standard Ultrasonic Source

October 1, 2008
Author(s)
Steven E. Fick
… systems that had been ordered with some calibration points in common, three were returned more than once to NIST for … and 102 measurements spanning a 17-year interval ending in 2001, the last year NIST ultrasound power measurement … These data have been analyzed to compare variations in output power with frequency, power level, and time elapsed …

Modeling of Photochemical Reactions in a Focused Laser Beam, II

September 1, 2008
Author(s)
Adolfas K. Gaigalas, Fern Y. Hunt, Lili Wang
… Synchronous detection of the resulting fluorescence yields in- phase and quadrature components. The measurement of the ratio of quadrature to in-phase components at several power levels yields … Specifically it is shown that the data can be interpreted in a manner which yields the value of the photodegradation …
Displaying 7026 - 7050 of 13218
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