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 10926 - 10950 of 74849

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

Technical Review of NIST’s Free Standard Reference Data Products

April 9, 2018
Author(s)
Debra L. Kaiser, Robert J. Hanisch
Over the past two years, the ODI has undertaken an ambitious effort to modernize the SRD Program. This report covers one aspect of this modernization effort, a comprehensive internal technical review of the 75 free data products currently carrying the SRD

Virtual Metrology White Paper - INTERNATIONAL ROADMAP FOR DEVICES AND SYSTEMS(IRDS)

April 9, 2018
Author(s)
Ndubuisi G. Orji, Yaw S. Obeng, Carlos Beitia, Supika Mashiro, James Moyne
This white paper provides an overview of virtual metrology (VM) and the benefits it can provide, with cost reduction (both capital expenditure and cycle time) being the primary benefit. The white paper also examines some of the issues preventing wider

Wideband infrared trap detector based upon doped silicon photocurrent devices

April 9, 2018
Author(s)
Solomon I. Woods, James E. Proctor, Timothy M. Jung, Adriaan C. Carter, Dana R. Defibaugh, Jorge Neira
We have designed, fabricated and measured infrared trapping detectors made from arsenic-doped silicon (Si:As) blocked impurity band (BIB) photodetectors. These trap detectors are composed of two detectors in a wedge geometry, with an entrance aperture

Selection of Silicon Photomultipliers for a 6 LiF:ZnS(Ag) Scintillator Based Cold Neutron Detector

April 8, 2018
Author(s)
A. Osovizky, Kevin N. Pritchard, Y. Yehuda-Zada, Jeffrey B. Ziegler, Peter NMN Tsai, M. Ghelman, Alan Keith Thompson, R. M. Ibberson, George M. Baltic, Charles Majkrzak, Nicholas C. Maliszewskyj
We describe the process of selecting a silicon photomultiplier (SiPM) as the light sensor for an ultrathin (2 nm) highly efficient cold neutron proportional counter. The neutron detector consists of 6LiF:ZnS(Ag) scintillator in which wavelength shifting

The New Large Antenna Positioning System for Over-The-Air Testing at the National Institute of Standards and Technology

April 8, 2018
Author(s)
Jeffrey R. Guerrieri, David R. Novotny, Josh Gordon, Alexandra Curtin, Michael S. Allman, Kim Hassett, Quang Ton
This paper introduces the new Large Antenna Positioning System (LAPS) at the National Institute of Standards and Technology (NIST). For the last eight years NIST has been pioneering the use of robotics for antenna measurements. Starting with the

Magnetic properties in ultra-thin 3d transition metal alloys II: experimental verification of quantitative theories of damping and spin-

April 7, 2018
Author(s)
Martin A. Schoen, Juriaan Lucassen, Hans T. Nembach, Thomas J. Silva, Bert Koopmans, Christian Back, Justin M. Shaw
A systematic study of the Gilbert damping is performed via ferromagnetic resonance for the disordered crystalline binary 3d transition metal alloys NiCo, NiFe and CoFe over the whole range of alloy compositions. After accounting for the inhomogeneous

Magnetic properties of ultra-thin 3d transition metal alloys I: spin and orbital moments and confirmation of Slater-Pauling theory

April 7, 2018
Author(s)
Martin A. Schoen, Juriaan Lucassen, Hans T. Nembach, Thomas J. Silva, Bert Koopmans, Christian Back, Justin M. Shaw
The structure and static magnetic properties - saturation magnetization, perpendicular anisotropy, Landé g-factor, and orbital magnetization - of thin film 3d transition metal alloys are determined over the full range of alloy compositions, via X-ray

Elementary Again

April 6, 2018
Author(s)
Mark W. Keller
Mark Keller explains how the elementary charge will soon be reinstated in metrology - and why it got sidelined in the first place.
Displaying 10926 - 10950 of 74849