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 12101 - 12125 of 73922

Candidates to Replace R-12 as a Radiating Gas in Cherenkov Detectors

April 14, 2018
Author(s)
Allan H. Harvey, Yauheni Paulechka, Patrick F. Egan
Dichlorodifluoromethane (R-12) has been used as a radiating gas in pressure threshold Cherenkov detectors for high-energy particle physics. However, that ozone-depleting compound is becoming unavailable due to the Montreal Protocol. To find a replacement

Waveguide coupling via magnetic gratings with effective strips

April 14, 2018
Author(s)
Kevin Roccapriore, David Lyvers, Dean Brown, Ekaterina Poutrina, Augustine Urbas, Thomas Germer, Vladimir Drachev
Gratings with complex multilayer strips are studied under inclined incident light. Great interest in these gratings is due to applications as input/output tools for waveguides and as subwavelength metafilms. The structured strips introduce anisotropy in

Xi-cam: A versatile interface for data visualization and analysis

April 13, 2018
Author(s)
Ronald Pandolfi, Dinesh Kumar, Guillaume Freychet, Holden Parks, Singanallur venkatakrishnan, Austin Blair, shreya Sahoo, Stefano marchesini, Christopher D. Liman, Daniel Sunday, Lenson Pellouchoud, Christopher Tassone, dilworth parkinson, Sean Fackler, Zhang Jiang, Apurva Mehta, Masafumi Fukuto, Kevin G. Yager, Regis J. Kline, Joseph Strzalka, Thomas Caswell, daniel Allan, Stuart Campbell, James Sethian, Harinarayan Krishnan, Alexander Hexemer

Combinatorial Security Testing Course

April 11, 2018
Author(s)
Dimitris Simos, Yu Lei, D. Richard Kuhn, Raghu N. Kacker
Combinatorial methods have attracted attention as a means of providing strong assurance at reduced cost, but when are these methods practical and cost-effective? This tutorial comprises two parts. The first introductory part will briefly explain the back-

Experimentally Generated Random Numbers Certified by the Impossibility of Superluminal Signaling

April 11, 2018
Author(s)
Peter L. Bierhorst, Emanuel H. Knill, Scott C. Glancy, Yanbao Zhang, Alan Mink, Stephen P. Jordan, Andrea Rommal, Yi-Kai Liu, Bradley Christensen, Sae Woo Nam, Martin J. Stevens, Lynden K. Shalm
From dice to modern complex circuits, there have been many attempts to build increasingly better devices to generate random numbers. Today, randomness is fundamental to security and cryptographic systems, as well as safeguarding privacy. A key challenge

Instrumented impact testing of miniaturized Charpy specimens of AM Ti-6Al-4V

April 11, 2018
Author(s)
Enrico Lucon, Nikolas W. Hrabe
An investigation on the impact toughness properties of wrought and additively-manufactured (AM) Ti 6Al 4V was conducted at NIST Boulder, by means of instrumented impact tests on miniaturized Charpy specimens. Full transition curves for absorbed energy and

Low-GWP Refrigerants; Options and Issues

April 11, 2018
Author(s)
Piotr A. Domanski, Riccardo Brignoli, J S. Brown, Andrei F. Kazakov, Mark O. McLinden
This research explored the possibilities for refrigerants having low global warming potential (GWP) with a particular focus on high-pressure applications. The search for suitable refrigerants relied on screening of a comprehensive database using filters of

Photonic chip for laser stabilization to an atomic vapor at a precision of $10^{-11}$

April 11, 2018
Author(s)
Matthew T. Hummon, Songbai Kang, Douglas G. Bopp, Qing Li, Daron A. Westly, Sangsik Kim, Connor D. Fredrick, Scott A. Diddams, Kartik A. Srinivasan, John E. Kitching
We perform precision spectroscopy of rubidium confined in a micro-machined, 27~mm$^3$ volume, vapor cell using a collimated free space 120~$\bm{\mu}$m diameter laser beam derived directly from a single mode silicon nitride waveguide. With this optical

Cholesterol Functionalized Aliphatic N-Substituted 8 Membered Cyclic Carbonate

April 10, 2018
Author(s)
Vivek M. Prabhu, Shrinivas Venkataraman, Kenneth Mineart, James Hedrick, Yi Yan Yang
Straightforward synthesis of cholesterol functionalized aliphatic N-substituted 8 membered cyclic carbonate monomer is reported. Well-defined PEGylated diblock copolymers were readily accessed via organo catalytic ring opening polymerization. These block

The Evolution of Polystyrene as a Cell Culture Material: A Brief History

April 10, 2018
Author(s)
Max J. Lerman, Josephine Lembong, Shinichiro Muramoto, John G. Gillen, John P. Fisher
Polystyrene (PS) has brought in vitro cell culture from its humble beginnings to the modern era, propelling dozens of research fields along the way. This review discusses the development of the material, fabrication, and treatment approaches to create the

Angle- and Delay-Dispersion Characteristics in a Hallway and Lobby at 60 GHz

April 9, 2018
Author(s)
Roy Sun, Peter B. Papazian, Jelena Senic, Camillo A. Gentile, Catherine A. Remley
In this paper, we present results from measurement data collected in a hallway and lobby up to 33 meters in line-of-sight and non-line-of-sight conditions. The data was collected using a custom double-directional 60 GHz channel sounder. By tracking the

Bringing Precision to 5G Test: Activities in the U.S.

April 9, 2018
Author(s)
Catherine A. Remley, Maria G. Becker
(Workshop Abstract) The next generation (5G) network won’t just deliver much faster connection and higher data capacity. It also promises to provide reliable connectivity, low energy consumption, and connecting billions of people and trillions of things

Criticality Analysis Process Model

April 9, 2018
Author(s)
Celia Paulsen, Jon M. Boyens, Nadya Bartol, Kris Winkler
In the modern world, where complex systems and systems-of-systems are integral to the functioning of society and businesses, it is increasingly important to be able to understand and manage risks that these systems and components may present to the

Spatial Channels for Wireless Over-the-Air Measurements in Reverberation Chambers

April 9, 2018
Author(s)
Maria G. Becker, Rob Horansky, Damir Senic, Vincent T. Neylon, Kate Remley
NIST is developing a hybrid test chamber for over-the-air characterization of the next generation of wireless devices in spatial channel environments. By combining features of both reverberation and anechoic chambers, the hybrid chamber will produce
Displaying 12101 - 12125 of 73922
Was this page helpful?