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Search Publications

NIST Authors in Bold

Displaying 10426 - 10450 of 73697

Proceedings of the First Workshop on Standards for Microfluidics

January 28, 2019
Author(s)
Darwin R. Reyes-Hernandez, Henne van Heeren
In the last two decades, the microfluidics/lab-on-a-chip field has evolved from the concept of micro total analysis systems, where systems with integrated pretreatment and analysis of chemicals were envisioned, to what is known today as lab-on-a-chip

Rethinking Timekeeping for Modern IT Solutions

January 28, 2019
Author(s)
Son VoBa, Charles L. Ulland, Michael Lombardi, Arno Lentfer
Advances in processor performance and virtualization technologies, together with complexities of operating systems (OS) and software defined networking, have outpaced legacy network-based solutions for keeping system clocks accurate across geographic

Upstream vortex and elastic wave in the viscoelastic flow around a confined cylinder

January 28, 2019
Author(s)
Boyang Qin, Paul Salipante, Steven Hudson, Paulo E. Arratia
The viscoelastic flow past cylinder is a classic benchmark problem that is not completely understood. Using novel holographic particle velocimetry, we report two main discoveries of the elastic instability upstream of a single cylinder in confined channel

Structural, chemical, electrical and thermal properties of n-type NbFeSb

January 26, 2019
Author(s)
Dean Hobbis, Raphael P. Hermann, Hsin Wang, David S. Parker, Tribhuwan Pandey, Joshua B. Martin, Katharine L. Page, George S. Nolas
We report on the structural, chemical, electrical and thermal properties of n-type polycrystalline NbFeSb synthesized by induction melting of the elements. Although several studies on p-type conduction of this half-Heusler composition have recently been

MoS2 cleaning by acetone and UV-Ozone: Geological vs. synthetic material (Letter)

January 25, 2019
Author(s)
Keren M. Freedy, Sales G. Maria, Sergiy Krylyuk, Albert Davydov, Stephen J. McDonnell
The effects of poly(methyl methacrylate) PMMA removal procedures on the surface chemistry of both geological and chemical vapor deposited (CVD) MoS2 are investigated. X-ray photoelectron spectroscopy is employed following acetone dissolution, thermal

The quantum Zeno paradox, 42 years on

January 25, 2019
Author(s)
Wayne M. Itano
The term 'quantum Zeno paradox' or 'quantum Zeno effect' refers to the slowing down of the evolution of a quantum system as it is observed more and more frequently. In 1977, Misra and Sudarshan gave a theoretical demonstration of its existence. There has

A Method Level Test Generation Framework for Debugging Big Data Applications

January 24, 2019
Author(s)
Huadong Feng, Jagan Chandrasekaran, Yu Lei, Raghu N. Kacker, D. Richard Kuhn
When a failure occurs in a big data application, debugging with the original dataset can be difficult due to the large amount of data being processed. This paper introduces a framework for effectively generating method-level tests to facilitate debugging

A Method-Level Test Generation Framework for Debugging Big Data Applications

January 24, 2019
Author(s)
Raghu N. Kacker, David R. Kuhn, Huadong Feng, Yu J. Lei
Big data applications are now widely used to process massive amounts of data we create every day. When a failure occurs in a big data application, debugging at the system-level input can be expensive due to the large amount of data being processed. This

Progress Towards Standards for Quantitative MRI (qMRI) and Outstanding Needs

January 24, 2019
Author(s)
Kathryn E. Keenan, Joshua R. Biller, Michael A. Boss, Adele P. Peskin, Karl F. Stupic, Stephen E. Russek, Jana Delfino, Mark Does, Jeffrey L. Evelhoch, Mark Griswold, Jeffrey Gunter, R Scott Hinks, Stuart Hoffman, Geena Kim, Riccardo Lattanzi, Xiaojuan Li, Luca Marinelli, Pratik Mukherjee, Robert J. Nordstrom, Elena Perez, Berkman Sahiner, Natalie J. Serkova, Amita Shukla-Dave, Michael Steckner, Lisa J. Wilmes, Holden Wu, Huiming Zhang, Edward F. Jackson, Daniel Sullivan
The National Institute of Standards and Technology (NIST) MRI Standards project held a one-day workshop on August 4, 2017 on campus in Boulder, CO. The goal of the workshop was to evaluate the advances in quantitative MRI (qMRI) since the last NIST

Trapped Ion Quantum Information Processing with Squeezed Phonons

January 24, 2019
Author(s)
Wenchao Ge, Brian Sawyer, Joseph W. Britton, Kurt Jacobs, John Bollinger, Michael Foss-Feig
Trapped ions offer a pristine platform for quantum computation and simulation, but improving their coherence remains a crucial challenge. Here, we propose and analyze a new strategy to enhance the coherent interactions in trapped-ion systems via parametric

Mechanosensitive ion permeation across sub-nanoporous MoS2 monolayers

January 23, 2019
Author(s)
Alta Y. Fang, Kenneth Kroenlein, Alexander Smolyanitsky
We use all-atom molecular dynamics simulations informed by density functional theory calculations to investigate aqueous ion transport across subnanoporous monolayer molybdenum disulfide (MoS2) membranes subject to varying tensile strains. Driven by a

Impedance tuning with photoconductors to 40 GHz

January 22, 2019
Author(s)
Jasper A. Drisko, Ari D. Feldman, Franklyn J. Quinlan, James C. Booth, Nathan D. Orloff, Christian J. Long
Light has been widely used to control a variety of microwave devices, including switches, antennas, and detectors. Here, we present a photoconductive device integrated into a coplanar waveguide to tune complex impedances at microwave frequencies with

Chip-integrated visible-telecom entangled photon pair source for quantum communication

January 21, 2019
Author(s)
Xiyuan Lu, Qing Li, Daron Westly, Gregory Moille, Anshuman Singh, Vikas Anant, Kartik Srinivasan
Photon pair sources are fundamental blocks for quantum entanglement and quantum communication. Recent studies in silicon photonics have documented promising characteristics for photon pair sources within the telecommunications band, including sub-milliwatt

Machine Learning techniques for state recognition and auto-tuning in quantum dots

January 20, 2019
Author(s)
Sandesh Kalantre, Justyna Zwolak, Stephen Ragole, Xingyao Wu, Neil M. Zimmerman, Michael Stewart, Jacob Taylor
Recent progress in building large-scale quantum devices for exploring quantum computing and simulation paradigms has relied upon effective tools for achieving and maintaining good experimental parameters, i.e. tuning up devices. In many cases, including in

Compositional Models for Complex Systems

January 19, 2019
Author(s)
Spencer J. Breiner, Ram D. Sriram, Eswaran Subrahmanian
In this chapter we argue for the use of representations from category theory to support better models for complex systems, and provide an example of such an application might look like. Our approach rests on the well known observation that complex system

Effect of Chloride Concentration on Copper Deposition in Through Silicon Vias

January 18, 2019
Author(s)
Trevor Braun, Daniel Josell, Manoj R. Silva, Thomas P. Moffat
This work examines Cu deposition in low chloride, suppressor containing electrolytes that exhibit a transition from passive to active deposition partway down filling features based on the coupling of suppression breakdown and surface topography. The

Ni 2 Mo 3 O 8 : Complex Antiferromagnetic Order on a Honeycomb Lattice

January 18, 2019
Author(s)
Jennifer R. Morey, Allen Scheie, John P. Sheckelton, Craig Brown, Tyrel M. McQueen
Theoretical studies have predicted the existence of topological magnons in honeycomb compounds with zig-zag antiferromagnetic (AFM) order. Here we report this discovery of zig-zag AFM order in the layered and non-centrosymmetric honeycomb nickelate Ni 2Mo

An Ultra-fast Multi-level MoTe2-based RRAM

January 17, 2019
Author(s)
Albert Davydov, Leonid A. Bendersky, Sergiy Krylyuk, Huairuo Zhang, Feng Zhang, Joerg Appenzeller, Pragya R. Shrestha, Kin P. Cheung, Jason P. Campbell
We report multi-level MoTe2-based resistive random-access memory (RRAM) devices with switching speeds of less than 5 ns due to an electric-field induced 2H to 2Hd phase transition. Different from conventional RRAM devices based on ionic migration, the

A User Application-Based Access Point Selection Algorithm for Dense WLANs

January 16, 2019
Author(s)
Munsuk Kim, Ye Na Kim, Sukyoung Lee, Nada T. Golmie, SeungSeob Lee
The current commercial access point (AP) selection schemes are mostly based on signal strength, but perform poorly in many situations because they ignore the actual load distributions among the APs. To address this shortcoming, a number of alternative

Higher Order Effects in Organic LEDs with Sub-bandgap Turn-on

January 16, 2019
Author(s)
Sebastian Engmann, Adam J. Barito, Emily Bittle, Chris Giebink, Lee J. Richter, David J. Gundlach
Spin-dependent nonlinear processes in organic materials such as singlet-fission and triplet- triplet annihilation could increase the performance for photovoltaics, detectors, and light emitting diodes. Rubrene/C60 light emitting diodes exhibit a distinct
Displaying 10426 - 10450 of 73697
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