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Displaying 10401 - 10425 of 13225

Output Power Maximization of a Microgenerator Using Machine Learning Approach

December 5, 2019
Author(s)
Kamran Sayrafian, Masoud Roudneshin, Amir G. Aghdam
… the device to operate for a limited time. Any disruption in the battery power could lead to temporary loss of vital data. Kinetic-based micro-energy-harvesting is a technology that could prolong the battery life time or … several machine learning approaches are presented in this paper to optimally tune the electrostatic force …

Magneto-optic trap using a reversible, solid-state alkali-metal source

June 6, 2019
Author(s)
Songbai Kang, Kaitlin R. Moore, James P. McGilligan, R. Mott, A. Mis, C. Roper, Elizabeth A. Donley, John E. Kitching
… and low-power alkali-atom sources are desirable in both tabletop and portable cold-atom sensors. Here we demonstrate a magneto-optic trap (MOT) formed in conjunction with a reversible solid state Rb reservoir in … increase in the number of trapped atoms. The core technology of this device should translate readily to other …

Environmental Friendly Flame Resistant Coatings for Soft Furnishing

May 1, 2019
Author(s)
Yeon S. Kim, Yu-Chin Li, John R. Shields, Rick D. Davis
… materials. The coatings caused significant reductions in the flammability (e.g., heat release, ignition propensity, … and flame spread) of these substrates. When used in full-scale fire tests, the coated foam caused as high as a 75% reduction in peak, total, and average heat release of furniture. …

A novel approach to converting alkylated arsenic to arsenic acid for accurate ICP-OES determination of total arsenic in candidate speciation standards

August 3, 2018
Author(s)
Savelas A. Rabb, Lee L. Yu, My D. Le
… The National Institute of Standards and Technology has developed a new series of organic As reference … used for the calibration of measurements of these species in various matrices. Conversion of the organic As species to inorganic As V was required to prevent bias in the ICP-OES measurements. Different acid/solvent …

NIST Micronutrients Measurement Quality Assurance Program: Spring and Fall 1986 Comparability Studies Results for Round Robins VII and VIII Fat Soluble Vitamins and Carotenoids in Human Serum

July 27, 2018
Author(s)
Jeanice M. Brown Thomas, David L. Duewer, Margaret C. Kline, Neal Craft, Fillmer Ruegg, Emil Schonberger, Robert Schaffer, Robert Paule
… From 1984 to 2017, the National Institute of Standards and Technology coordinated the Micronutrients Measurement Quality … that measure fat soluble vitamins and carotenoids in human serum and plasma. This report describes the design … 1) Round Robin VII Fat Soluble Vitamins and Carotenoids in Human Serum and 2) Round Robin VIII Fat Soluble Vitamins …

Octave-spanning dual frequency comb spectroscopy in the molecular fingerprint region

June 4, 2018
Author(s)
Henry R. Timmers, Abijith S. Kowligy, Alexander J. Lind, Flavio Caldas da Cruz, Nima Nader, Myles C. Silfies, Thomas K. Allison, Gabriel G. Ycas, Peter G. Schunemann, Scott B. Papp, Scott A. Diddams
… Spectroscopy in the molecular fingerprint spectral region (6.5-20 $\mu$m) … challenging to cover with conventional laser technologies. In this report, we present a simple and robust method for generating super-octave, optical frequency combs in the fingerprint region through intra-pulse difference …

Large-Scale, Real-Fire Structural Testing: A unique testing and metrology challenge

September 8, 2017
Author(s)
Matthew S. Hoehler
… associated with measurement of structural performance in this environment. While dramatic structural collapse … (NFRL) at the National Institute of Standards and Technology. The talk will highlight recently completed and ongoing projects in the NFRL and discuss possible solutions to improve …

Simultaneous Control of the Dzyaloshinskii-Moriya Interaction and Magnetic Anisotropy in Nanomagnetic Trilayers

August 17, 2017
Author(s)
Andrew L. Balk, Kyoung-Whan Kim, Daniel T. Pierce, Mark D. Stiles, John Unguris, Samuel Stavis
… eV can tune the Dzyaloshinskii-Moriya interaction (DMI) in Pt/Co/Pt trilayers. Varying the irradiation energy and … and apply a physical model for a poorly understood peak in domain wall velocity at zero in-plane field. The ability to tune the DMI with the spatial …

Coupled Bilayer Photonic Crystal Slab Electro-Optic Spatial Light Modulators

March 1, 2017
Author(s)
Yichen Shuai, Deyin Zhao, Corey A. Stambaugh, John R. Lawall, Weidong Zhou, Yonghao Liu
… a device with an 80 μm × 80 μm mesa area, while bandwidths in the gigahertz range are expected by shrinking the mesa … platform, illustrating the potential of these devices in vertically integrated photonic technologies and for …

ICSD Accessibility in Support of Materials Research and Design

February 19, 2017
Author(s)
Vicky L. Karen, A J. Belsky
… The materials community in both science and industry use crystallographic data models … materials helps researchers concentrate experimental work in directions that optimize the discovery process. The … Karlsruhe and the National Institute of Standard and Technology. The ICSD is disseminated in computerized formats …

Interlaboratory Analytical Comparison Study of Fatty Acid Concentrations in Human Serum- Results for Exercise 03: QA16FASER03

September 27, 2016
Author(s)
Michele M. Schantz
… The National Institute of Standards and Technology (NIST), at the request of the National Institute … Health’s (NIH’s) Office of Dietary Supplements (ODS) and in conjunction with the Centers for Disease Control and … analytical comparison study of fatty acid concentrations in human serum in 2016. Three unknown serum samples were …

Visualizing the Impact of a Publication: "The Protein Data Bank" in Nucleic Acids Research, 2000

July 6, 2016
Author(s)
Talapady N. Bhat, Susan L. Makar, Amanda J. Malanowski
… (PDB) was established at Brookhaven National Laboratories in 1971 as an archive for biological macromolecular crystal … molecules, including proteins and nucleic acids. In October 1998, the management of the PDB became the … at San Diego, and the National Institute of Standards and Technology (NIST). This analysis examines the impact of the …

A precise instrument to determine the Planck constant, and the future kilogram

June 21, 2016
Author(s)
Darine El Haddad, Frank C. Seifert, Leon S. Chao, David B. Newell, Jon R. Pratt, Carl J. Williams, Stephan Schlamminger, Shisong Li
… called a watt balance, compares mechanical power measured in terms of the meter, the second and the kilogram to electrical power measured in terms of the volt and the ohm. A direct link between … watt balance at the National Institute of Standards and Technology (NIST), and report our initial determination of …

Insights on Formal Methods of Cybersecurity

May 27, 2016
Author(s)
Jeffrey M. Voas, Kim B. Schaffer
… 1 simple question to find out what has occurred recently in terms of applying formal methods (FM) to security-centric, cyber problems: Please summarize in a paragraph the state of the research and practitioner … Labs), Paul Black (National Institute of Standards and Technology), Karl Levitt (University of California at Davis), …

NIST Big Data Interoperability Framework: Volume 2, Big Data Taxonomies

October 22, 2015
Author(s)
Wo L. Chang, Nancy Grady, Community Resilience Program NIST
… Data is a term used to describe the large amount of data in the networked, digitized, sensor- laden, … of data is outpacing scientific and technological advances in data analytics. To advance progress in Big Data, the NIST Big Data Public Working Group (NBD-PWG) …

Hydrogen Field Test Standard Design, Operating Instructions, & Specifications

September 10, 2015
Author(s)
Jodie G. Pope
… The National Institute of Standards and Technology (NIST) developed a prototype field test standard … Temperature (PVT), and 3) master meter. The FTS was tested in NIST’s Transient Flow Facility with helium gas and in the field at a hydrogen dispenser location. This document …

NIST Language Recognition Evaluation Plans For 2015

September 10, 2015
Author(s)
Alvin F. Martin, Craig S. Greenberg, John M. Howard, Desire Banse, G R. Doddington, Jaime Hernandez-Cordero, Lisa Mason
… coordinated evaluations of automatic language recognition technology planned for calendar year 2015 along with possible … the next NIST Language Recognition Evaluation, following in the series of NIST evaluations previously held in 1996, 2003, 2005, 2007, 2009, and 2011. This evaluation …

Light shifts in a pulsed cold-atom coherent-population-trapping clock

April 10, 2015
Author(s)
Eric M. Blanshan, Elizabeth A. Donley, John E. Kitching
… atomic clocks capable of primary standard performance in compact physics packages would be of significant value in a variety of applications. A cold-atom coherent population … pulsed Ramsey interrogation is a strong candidate for this technology if the frequency biases can be minimized and …

The NIST Traceable Reference Material Program for Gas Standards

February 26, 2015
Author(s)
William D. Dorko, Michael E. Kelley, Franklin R. Guenther
… maintained by the National Institute of Standards and Technology (NIST). The gaseous mixtures, referred to as gas … Traceable Reference Materials (NTRMs), must be similar in composition to NIST primary standards and the …
Displaying 10401 - 10425 of 13225
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