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Search Publications

NIST Authors in Bold

Displaying 1726 - 1750 of 2915

Low Harmonic Distortion in a Josephson Arbitrary Waveform Synthesizer

August 14, 2000
Author(s)
Samuel P. Benz, Charles J. Burroughs, Paul D. Dresselhaus
The use of broadband integrated filters has enabled practical operating margins for ac waveforms synthesized from the perfectly quantized voltage pulses of Josephson junction arrays. This improvement enabled the digital synthesis of arbitrary waveforms

Imaging of induced surface charge distribution effects in glass vapor cells used for Rydberg atom-based sensors

June 1, 2025
Author(s)
Charles Patrick, Noah Schlossberger, Daniel Hammerland, Nikunjkumar Prajapati, Tate McDonald, Samuel Berweger, Rajavardhan Talashila, Alexandra Artusio-Glimpse, Christopher Holloway
We demonstrate the imaging of localized surface electric (E) field effects on the atomic spectrum in a vapor cell used in Rydberg atom-based sensors. These surface E-fields can result from an induced electric charge distribution on the surface. Induced

Orientation and Magnetic Properties of FePt and CoPt Films Grown on MgO(110) Single-Crystal Substrate by Electron-Beam Coevaporation

October 12, 2021
Author(s)
M-H Yu, Hiroyuki Ohguchi, Antonio Zambano, Ichiro Takeuchi, J P. Liu, Daniel Josell, Leonid A. Bendersky
We have studied the orientation and magnetic properties of FePt and CoPt films deposited by electron-beam co-evaporation on MgO(110) single-crystal substrates at different substrate temperatures between 500 and 700 degrees C. We observed that the long

Simulation of a Single Asperity Impacts at Head-Disk Interface

October 12, 2021
Author(s)
Tze J. Chuang, Stephen M. Hsu
During the track accessing mode of a hard disk drive, the flying height of the slider over the disk surface becomes smaller and smaller as the demand in data storage a real density increases. As a result, the propensity of glide avalanche is bound to

Sensitivity Analysis Affecting the Calibration of Heat-Flow-Meter Apparatus

July 1, 2019
Author(s)
Robert R. Zarr, Sergio A. Carvajal, James J. Filliben
Results and analysis of a sensitivity study of four procedural variables on the calibration response of two commercial heat-flow-meter apparatus in compliance with ASTM Test Method C 518 are presented. The apparatus ranged in plate size from 305 mm by 305

Mechanisms of spontaneous chain formation and subsequent microstructural evolution in shear- driven strongly confined drop monolayers

May 18, 2019
Author(s)
Sagnik Singha, Abhilash R. Malipeddi, Mauricio Zurita-Gotor, Kausik Sarkar, Kevin Shen, Michael Loewenberg, Kalman D. Migler, Jerzy Blawzdziewicz
It was experimentally demonstrated by Migler and his collaborators [Phys. Rev. Lett. 2001, 86, 1023; Langmuir 2003, 19, 8667] that a strongly confined drop monolayer sheared between two parallel plates can spontaneously develop a flow-oriented drop-chain

Temperature-Dependent Material Modeling for Structural Steels: Formulation and Application

April 15, 2016
Author(s)
Mina S. Seif, William E. Luecke, Lisa Y. Choe, Joseph A. Main, Joseph D. McColskey, Chao Zhang, Jonathan M. Weigand, John L. Gross, Fahim Sadek
This report presents the formulation and application of a newly developed temperature-dependent material model for structural steels. First it presents a model for computing the stress-strain behavior of structural steel for conditions appropriate to fire

Accurate determination of the size distribution for polydisperse, cationic metallic nanomaterials by asymmetric-flow field flow fractionation

November 13, 2014
Author(s)
Julien C. Gigault, Thao M. Nguyen, John M. Pettibone, Vincent A. Hackley
In this work we have developed and validated a methodology for determining the size distribution in polydisperse cationic nanoparticle (NP) samples using asymmetric-flow field flow fractionation (A4F), where known compositional influence of previously used

Method for Assessing the Potential Effects of Nanoparticles and other Emerging Contaminants on the Catabolic Capabilities of Microbial Communities

September 1, 2013
Author(s)
Kela Weber, Elijah Petersen, Sonja Bissegger, Lars Rehmann, Iris Koch, Jun Zhang, Kenneth Reimer, Robin Slawson, Raymond Legge, Denis O'Carroll
With an increasing utilization of nanoparticles (NPs) in consumer products, the potential for release to the environment also increases. It is therefore imperative that methods to test their potential effects in ecosystems are developed. This study

Air Blast Loading of Cellular Media

July 1, 2007
Author(s)
George A. Gazonas, Joseph Main
Motivated by recent efforts to mitigate blast loading using energy-absorbing materials, this paper investigates the mechanics of uniaxial crushing of cellular sandwich plates under air blast loading using analytical and computational modeling. This model

Whisker Formation in Pb-Free Surface Finishes

September 11, 2006
Author(s)
Gery R. Stafford, Maureen E. Williams, C E. Johnson, Kil-Won Moon, Ugo Bertocci, William J. Boettinger
… apparatus. Beam deflection measurements within 15 min. of plating proved that all electrodeposits had in-plane …

Research Trends in Lead-Free Soldering in the U.S.: NCMS Lead-Solder Project

October 1, 1999
Author(s)
I Artaki, D Noctor, C Desantis, W Desaulnier, L Felton, M Palmer, J Felty, J Greaves, C A. Handwerker, J D. Mather, S Schroeder, D Napp, TG Y. Pan, J Rosser, P Vianco, G Whitten, Y Zhu
In 1997, the National Center for Manufacturing Sciences Lead Free Solder Project carried out by a consortium of 11 industrial corporations, academic institutions, and national laboratories completed its four year program to identify and evaluate

Electron-Impact Total Ionization Cross Sections of CF 4 , C 2 F 6 , and C 3 F 8

February 1, 1999
Author(s)
H Nishimura, W M. Huo, M A. Ali, Yong Sik Kim
Both theoretical and experimental electron-impact total ionization cross sections of CF 4, C 2F 6, and C 3F 8 are presented. The experimental cross sections have been measured as a function of incident electron energy T from threshold to 3 keV. A parallel

Rydberg states of alkali atoms in atomic vapor as SI-traceable field probes and communications receivers

September 16, 2024
Author(s)
Noah Schlossberger, Samuel Berweger, Nikunjkumar Prajapati, Andrew Rotunno, Alexandra Artusio-Glimpse, Matthew Simons, Abrar Sheikh, Eric Norrgard, Stephen Eckel, Christopher Holloway
Rydberg states of alkali atoms are highly sensitive to electric fields because their electron wavefunction has a large spatial extent, leading to large polarizabilities for static fields and large transition dipole moments for time-varying fields. Over the

Large Negative Poisson's Ratio for SrTiO3 Thin Films Grown on Si(001

October 12, 2021
Author(s)
F S. Aguirre-Tostado, A Herrera-Gomez, Joseph Woicik, R Droopad, Z Yu, D G. Schlom, E Karapetrova, P Pianetta, C S. Hellberg
The driving force of the semiconductor industry to integrate thin transition-metal oxides with Si transistor technology has led to the development of SrTiO3 thin-film growth on Si(001). As SrTiO3 represents a large class of oxides with the perovskite
Displaying 1726 - 1750 of 2915
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