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Search Publications

NIST Authors in Bold

Displaying 16376 - 16400 of 73697

Design and synthesis of a minimal bacterial genome

March 25, 2016
Author(s)
Elizabeth A. Strychalski, Clyde A. Hutchinson III, Ray-Yuan Chuang, Vladimir Noskov, Nacyra Assad-Garcia, Tom J. Deerinck, Mark H. Ellisman, John Gill, Krishna Kannan, Bogumil J. Karas, Li Ma, James F. Pelletier, Zhi-Qing Qi, Alexander Richter, Lijie Sun, Yo Suzuki, Billyana Tsvetanova, Kim S. Wise, Hamilton O. Smith, John I. Glass, Chuck Merryman, Daniel G. Gibson, J. C. Venter
We used whole-genome design and complete chemical synthesis to minimize the 1079–kilobase pair synthetic genome of Mycoplasma mycoides JCVI-syn1.0. An initial design, based on collective knowledge of molecular biology combined with limited transposon

EUV-induced oxidation of carbon on TiO2

March 25, 2016
Author(s)
Nadir S. Faradzhev, Shannon B. Hill
Previously we reported on the etch rates of C on TiO2 by oxidizers including NO, O3 and H2O2 when irradiated by extreme ultraviolet (EUV) radiation at 13.5 nm [Faradzhev et al., J.Phys. Chem. C, 117 (2013) 23072-23081]. We demonstrated that the intensity

Laser Trackers for Large Scale Dimensional Metrology: A Review

March 25, 2016
Author(s)
Balasubramanian Muralikrishnan, Steven D. Phillips, Daniel S. Sawyer
Thirty years since their invention, laser trackers are now recognized as the measurement tool of choice in the manufacture and assembly of large components. While their general design, i.e., a ranging unit on a two-axis gimbal, has not changed

Multispectrum analysis of the Oxygen A-band

March 25, 2016
Author(s)
Joseph T. Hodges, Brian J. Drouin, D C. Benner, L.R. Brown, Matthew J. Cich, Timothy Crawford, Malathy Devi, Alexandre Guillaume, Eli Mlawer, D J. Robichaud, Oyafuso Fabiano, Keeyon Sung, Wishnow Edward, Shanshan Yu
Retrievals of atmospheric composition from near-infrared measurements require measurements of airmass to better than the desired precision of the composition. The oxygen bands are obvious choices to quantify airmass since the mixing ratio of oxygen is

Reproducibility in density functional theory calculations of solids

March 25, 2016
Author(s)
Francesca Tavazza, Kurt Lejaeghere, Stefaan Cottenier, Gustav Bihlmayer
Density functional theory (DFT) is now routinely used for simulating material properties. Many software packages are available, which makes it challenging to know which are the best to use for a specific calculation. Lejaeghere et al. compared the

Bright focused ion beam sources based on laser-cooled atoms

March 24, 2016
Author(s)
Jabez J. McClelland, Adam V. Steele, Brenton J. Knuffman, Kevin A. Twedt, Andrew D. Schwarzkopf, Truman M. Wilson
Nanoscale focused ion beams (FIBs) represent one of the most useful tools in nanotechnology, enabling nanofabrication via milling and gas-assisted deposition, microscopy and microanalysis, and selective, spatially resolved doping of materials. Recently, a

Fast Sequential Creation of Random Realizations of Degree Sequences

March 24, 2016
Author(s)
Brian D. Cloteaux
We examine the problem of creating a random realizations of very large degree sequences. While fast in practice, the Markov chain Monte Carlo (MCMC) method for selecting a realization has limited usefulness for creating large graphs because of memory

National Institute of Standards and Technology measurement service of the optical properties of biomedical phantoms: Current status

March 24, 2016
Author(s)
Paul Lemaillet, Catherine C. Cooksey, Zachary H. Levine, Adam L. Pintar, Jeeseong Hwang, David W. Allen
The National Institute for Standards and Technology (NIST) has maintained scales of reflectance and transmittance over several decades. Those scales are primarily intended for the regular transmittance, mirrors, and solid surface scattering diffusers. The

A domain-specific language for model composition and verification of multidisciplinary models

March 22, 2016
Author(s)
Peter O. Denno, Anantha Narayanan Narayanan, Amogh Kulkarni, Daniel Balasubramanian, Gabor Karsai
Complex, engineered products and manufacturing processes often necessitate integrated analysis that cuts across physical domains and engineering disciplines. When the domain-specific models that contribute to the overall analysis process are available then

Advances in shape measurement in the digital world

March 22, 2016
Author(s)
Edward Garboczi, Xiaodong Jia
The importance of particle shape in affecting the behaviour of powders and other particulate systems has long been recognised, but until fairly recently particle shape information has been rather difficult to obtain and use compared to its more well-known

Magnetic Structure of Yb 2 Pt 2 Pb: Ising Moments on the Shastry-Sutherland Lattice

March 22, 2016
Author(s)
W. Miiller, L. S. Wu, M. S. Kim, T. Orvis, J. W. Simonson, M. Gamza, D. M. McNally, C. S. Nelson, G. Ehlers, A. Podlesnyak, Joel Helton, Yang Zhao, Yiming Qiu, John R. Copley, Jeffrey W. Lynn, I. Zaliznyak, M. C. Aronson
Neutron diffraction measurements were carried out on single crystals and powders of Yb 2Pt 2Pb, where Yb moments form planes of orthogonal dimers in the frustrated Shastry-Sutherland Lattice (SSL). Yb 2Pt 2Pb orders antiferromagnetically at T N=2.07 K, and

SATE V Ockham Sound Analysis Criteria

March 22, 2016
Author(s)
Paul E. Black, Athos Ribeiro
Static analyzers examine the source or executable code of programs to find problems. Many static analyzers use some heuristics or approximations to handle programs up to millions of lines of codes. We established the Ockham Sound Analysis Criteria to

Virtual rough samples to test 3D nanometer-scale SEM stereo photogrammetry

March 22, 2016
Author(s)
John S. Villarrubia, Vipin N. Tondare, Andras Vladar
The combination of SEM for high spatial resolution, images from multiple angles to provide 3D information, and commercially available stereo photogrammetry software for 3D reconstruction offers promise for dimensional metrology in 3D. A method is described

A domain-specific language for model composition and verification of multidisciplinary models

March 21, 2016
Author(s)
Peter O. Denno, Anantha Narayanan Narayanan, Amogh Kulkarni, Daniel Balasubramanian, Gabor Karsai
Complex, engineered products and manufacturing processes often necessitate integrated analysis that cuts across physical domains and engineering disciplines. When the domain-specific models that contribute to the overall analysis process are available then

Controllable Positive Exchange Bias via Redox-Driven Oxygen Migration

March 21, 2016
Author(s)
Dustin A. Gilbert, Justin Olamit, Randy K. Dumas, Brian J. Kirby, Alexander J. Grutter, Brian B. Maranville, Elke Arenholz, Julie A. Borchers, Kai Liu
We have observed oxygen migration across buried interfaces in Gd^xdx^Fe 1-x/NiCoO films, which leads to tunable positive exchange bias over a relatively small cooling field range of 300 mT. The tunability is shown to be the result of an interfacial layer
Displaying 16376 - 16400 of 73697
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