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Search Publications

NIST Authors in Bold

Displaying 12601 - 12625 of 73929

Correction of an adding-doubling inversion algorithm for the measurement of the optical parameters of turbid media

January 1, 2018
Author(s)
Paul Lemaillet, Catherine C. Cooksey, Jeeseong Hwang, Heidrun Wabnitz, Dirk Grosenick, Lin Yang, David W. Allen
We present broadband measurements of the optical properties of tissue-mimicking solid phantoms using a single integrating sphere to measure the hemispherical reflectance and transmittance under a direct illumination at the normal incident angle. These

Incorporating an Optical Clock into a Time Scale

January 1, 2018
Author(s)
Jian Yao, Thomas E. Parker, Neil Ashby, Judah Levine
This paper discusses how to build a time scale with an intermittently-operated optical clock. In particular, it gives suggestions on how long and how often to run an optical clock. It also explores the benefits of having an optical clock in a time scale

Rheological Properties of Jute-Based Cellulose Nanofibers under Different Ionic Conditions

January 1, 2018
Author(s)
Lihong Geng, Ali Naderi, Yimin NMN Mao, Chengbo Zhan, Priyanka Sharma, Xiangfang Peng, Benjamin S. Hsiao
Cellulose nanofibers (CNF) were produced by 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) -oxidation and mechanical shearing of jute pulp. The cross section dimension of CNFs was determined by small-angle neuron scattering (SANS), yielding a width of about

The enigmatic vitrification at the ancient hillfort Broborg and its utilization as an analogue for nuclear waste glass.

January 1, 2018
Author(s)
Jamie L. Weaver, Rolf Sjoblom, Eva Hjarthner-Holdar, Carolyn Pearce, Erik Ogenhall, Mia Englund, John McCloy, David Peeler, Albert Kruger
Although the modern understanding of chemistry dates back only around 300 years, many of the processes and products used today were actually originally developed by ancient people. However, much of such ancient knowledge has been lost, as is the case for

Latent Fingerprint Value Prediction: Crowd-based Learning

December 31, 2017
Author(s)
Elham Tabassi, Anil K. Jain, Tarang Chugh, Kai Cao, Jiayu Zhou
Latent fingerprints are one of the most crucial sources of evidence in forensic investigations. As such, devel- opment of automatic latent fingerprint recognition systems to quickly and accurately identify the suspects is one of the most pressing problems

Neuromorphic Computing through Time-Multiplexing with a Spin-Torque Nano-Oscillator

December 31, 2017
Author(s)
Mathieu Riou, Flavio Abreu Araujo, Jacob Torrejon, Sumito Tsunegi, Guru Khalsa, Damien Querlioz, Paolo Bortolotti, Vincent Cros, K. Yakushiji, Akio Fukushima, Hitoshi Kubota, Shinji Yuasa, Mark D. Stiles, Julie Grollier
Fabricating powerful neuromorphic chips the size of a thumb requires miniaturizing both hardware synapses and neurons. The challenge for neurons is to scale them down to submicrometer diameters while maintaining the properties that allow for reliable

Orientation Uncertainty Characteristics of Some Pose Measuring Systems

December 31, 2017
Author(s)
Marek Franaszek, Geraldine S. Cheok
We investigate the performance of pose measuring systems which determine an object's pose from measurement of a few fiducial markers attached to the object. Such systems use point-based, rigid body registration to get the orientation matrix. Uncertainty in

The Multi-Robot Large Antenna Positioning System for Over-The-Air Testing at the National Institute of Standards and Technology1

December 31, 2017
Author(s)
David R. Novotny, Josh Gordon, Michael S. Allman, Jeffrey R. Guerrieri, Alexandra Curtin, Kim Hassett, George McAdams, Quang Ton
To address dynamic testing requirements of new communications systems and RF processes that use non-static beam forming, NIST proposed the Large Antenna Positioning System (LAPS). The LAPS consists of two kinematically-linked six axis robotic arms, one of

Halogenated natural products

December 29, 2017
Author(s)
Terry Bidleman, John Kucklick, Henrik Kylin, Robert Letcher, Liisa Jantunen, Fiona Wong
This chapter summarizes the occurrence and fate on HNPs in the arctic physical environment and accumulation processes and presence in arctic biota. Except for halocarbons, there have been few investigations of HNPs in polar environments. Discussions of HNP
Displaying 12601 - 12625 of 73929
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