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Search Publications

NIST Authors in Bold

Displaying 5626 - 5650 of 74220

Particle Size Distributions for Cellulose Nanocrystals Measured by Transmission Electron Microscopy: An Interlaboratory Comparison

October 6, 2020
Author(s)
John E. Bonevich, Juris Meija, Bushell Michael, Martin Couillard, Kai Cui, Johan Foster, Douglas M. Fox, Markus Heidelmann, Byong Chon Park, Lingling Ren, Aleksandr B. Stefaniak, Ralf Theissmann, Natalia de Val Alda, Linda Johnston
Particle size is one of the key parameters that must be measured to ensure reproducible production of cellulose nanocrystals (CNCs) from various types of cellulose biomass and by different producers. It is also important for achieving reliable performance

A structure and activity relationship for single-walled carbon nanotube growth confirmed by in situ observations and modeling

October 5, 2020
Author(s)
Chao (. Hsin-Yun, Jiang Hua, Acevedo O. Francisco, Perla Balbuena, Esko Kauppinen, John Cumings, Renu Sharma
The structure and phase transformation of cobalt (Co) catalyst, during single walled carbon nanotube (SWCNT) growth, is elucidated for inactive, active and deactivated nanoparticles by in-situ imaging using an environmental transmission electron microscope

Harnessing dispersion in soliton microcombs to mitigate thermal noise

October 5, 2020
Author(s)
Jordan Stone, Scott Papp
We explore intrinsic thermal noise in soliton microcombs, revealing thermodynamic correlations induced by nonlinearity and group-velocity dispersion. A suitable dispersion design gives rise to control over thermal-noise transduction from the environment to

The National Bureau of Standards Reactor at the NIST Center for Neutron Research

October 5, 2020
Author(s)
Thomas Newton, Daniel J. Flynn, Robert Williams
The National Bureau of Standards Reactor at the NIST Center for Neutron Research (NCNR) is a 20 MW reactor using 93% enriched UO 2 plate-type fuel with D 2O coolant, moderator, and reflector, and is used for a variety of neutron science applications. 23 of

Matching and comparing objects in a serial cytometer

October 4, 2020
Author(s)
Nikita Podobedov, Matthew DiSalvo, Jason A. Hsu, Paul Patrone, Gregory A. Cooksey
Flow cytometers are indispensable for clinical studies, yet are hindered by inherent uncertainties. We have developed an optofluidic device capable of multiple measurements along a microfluidic channel, whereby many of the uncertainty components can be

Serial microfluidic cytometry with inertial and hydrodynamic flow focusing

October 4, 2020
Author(s)
Matthew DiSalvo, Paul Patrone, Gregory A. Cooksey
Microfluidics are increasingly used to develop flow cytometers with novel functionalities. Although various approaches exist to control particle positioning within microfluidics, the magnitude and mechanisms of measurement uncertainties that arise from

DYNAMIC MEASUREMENT OF NANOLITER PER MINUTE FLOW BY SCALED DOSAGE OF FLUORESCENT SOLUTIONS

October 3, 2020
Author(s)
Gregory A. Cooksey, Paul Patrone, James R. Hands, Stephen E. Meek, Anthony J. Kearsley
This work describes a new method for continuous measurement of flow in a microchannel from 1 nL/min to 1000 nL/min using an optofluidic device with waveguides that deliver and collect light from small regions of a microfluidic channel. By relating the

Effects of Environmental Temperature and Humidity on the Geometry and Strength of Polycarbonate Specimens Prepared by Fused Filament Fabrication

October 3, 2020
Author(s)
Lichen Fang, Yan Yishu, Ojaswi Agarwal, shengyu Yao, Jonathan Seppala, Sung Hoon Kang
It is widely known that the printing quality of fused filament fabrication (FFF) is heavily affected by environmental temperature and humidity, as the case of warping and porosity. However, there is little understanding about the quantitative relations

False Alarm Testing for Radiation Detection Systems

October 2, 2020
Author(s)
Dennis D. Leber, Leticia S. Pibida
An operator of a radiation detection system that displays a high rate of false alarms may be- come desensitized to these alarms. This action is known as alarm fatigue and can have detri- mental results as the operator may cease to respond to what may be

Optimizing Magnetically Shielded Solenoids for Large Volume 3 He Neutron Spin Filters

October 2, 2020
Author(s)
Wangchun Chen, Md. Hassan, Ross Erwin, Shannon M. Watson, Thomas R. Gentile, G. L. Jones
An important consideration when designing a magnetostatic cavity for various applications is to maximize the ratio of the volume of field homogeneity to the overall size of the cavity. We report a design of a magnetically shielded solenoid that

A Case Study of Medical Device Wireless Coexistence Evaluation

October 1, 2020
Author(s)
Mohamed Al-Kalaa, Joshua Guag, Seth Seidman, Yao Ma, Jason Coder
This article aims to provide a narrative for addressing wireless coexistence in medical devices to help medical device developers, test engineers, and regulatory affairs personnel throughout the device life cycle. Accordingly, we present a case-study

Assessment of plastic ingestion by pole-caught pelagic predatory fish around Oahu, Hawaii

October 1, 2020
Author(s)
K D. Hyrenbach, Zora McGinnis, Kathleen Paige, Dan Rapp, F. D. Horgen, Jennifer Lynch
While the occurrence of plastic ingestion in the large-sized dolphinfish and tunas taken by the Hawaii longline fishery is very low ( 5 %), the ingestion rates for the smaller fish caught with pole-and-line have not been documented. This study examined
Displaying 5626 - 5650 of 74220