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Search Publications

NIST Authors in Bold

Displaying 12676 - 12700 of 73697

On the Melting Curve of Sulfur Hexafluoride

November 9, 2017
Author(s)
Allan H. Harvey
A previous correlation for the melting curve of sulfur hexafluoride (SF6) is inconsistent with the thermodynamic slope at the triple point derived from the Clapeyron equation. It is shown that this is probably due to the previous authors combining an

Resonant X-ray Emission of Hexagonal Boron Nitride

November 9, 2017
Author(s)
John T. Vinson, Terrence J Jach, Matthias Mueller, Rainer Unterumsberger, Burkhard Beckhoff
The electronic structure of hexagonal boron nitride ({\it h}-BN) is explored using measurements of x-ray absorption and resonant inelastic x-ray scattering (RIXS) at the nitrogen K edge (1{\it s}) in tandem with calculations of the same using many-body

Towards reliable RRAM performance: macro- and microscopic analysis of operation processes

November 9, 2017
Author(s)
Gennadi Bersuker, Dmitry Veksler, David M. Nminibapiel, Pragya Shrestha, Jason Campbell, Jason Ryan, Helmut Baumgart, Maribeth Mason, Kin P. Cheung
Resistive RAM technology promises superior performance and scalability while employing well- developed fabrication processes. Conductance is strongly affected by structural changes in oxide insulators that make cell switching properties extremely sensitive

Characterization for an Industrial Wireless Network in a Gas Sensing Scenario

November 8, 2017
Author(s)
Mohamed Hany, Rick Candell
Employing wireless communications in gas sensing and air quality monitoring is extremely essential in many industrial scenarios where wired networks cannot perform the task safely and effectively. In industrial environments, deploying wireless gas sensing

Gas Chromatographic Retention Behavior of Polycyclic Aromatic Hydrocarbons (PAHs) and Alkyl- Substituted PAHs on Two Stationary Phases of Different Selectivity

November 8, 2017
Author(s)
Federica Nalin, Lane C. Sander, Walter B. Wilson, Stephen A. Wise
Retention indices (RIs) for 45 polycyclic aromatic hydrocarbons (PAHs) and 63 methyl- substituted PAHs were determined by gas chromatography – mass spectrometry (GC-MS) using two different stationary phases: a 50% (mole fraction) phenyl-substituted

Indentation mapping revealed poroelastic, but not viscoelastic,properties spanning native zonal articular cartilage

November 8, 2017
Author(s)
Joseph Wahlquist, Frank W. DelRio, Mark Randolph, Aaron Aziz, Chelsea Heveran, Stephanie Bryant, Corey P. Neu, Virginia L. Ferguson
Osteoarthrosis is a debilitating disease affecting millions, yet engineering materials for cartilage regeneration has proven difficult because of the complex microstructure of this tissue. Articular cartilage, like many biological tissues, produces a time

NIST Channel Sounder Overview and Channel Measurements in Manufacturing Facilities

November 8, 2017
Author(s)
Jeanne T. Quimby, Richard Candell, Catherine A. Remley, David R. Novotny, Joseph Diener, Peter B. Papazian, Alexandra Curtin, Galen H. Koepke
Manufacturers are increasingly choosing wireless platforms to replace wired ones due to their ease of installation, upgrade, and reconfigurability. Reliable and secure real-time performance of wireless platforms is technically challenging because wireless

Overview of an Ontology-based Approach for Kit Building Applications

November 8, 2017
Author(s)
Zeid Kootbally, Thomas Kramer, Craig I. Schlenoff, Satyandra K. Gupta
The Agility Performance of Robotic Systems (APRS) project at the National Institute of Standards and Technology (NIST) is using Web Ontology Language (OWL) ontologies for modeling in a robotic kitting workstation. The new technical idea for the APRS

Service Life Prediction -Why is this so hard?

November 8, 2017
Author(s)
Christopher C. White, Kenneth M. White, James Pickett
Service life prediction in general and weathering lifetime in particular have been persistent problems despite nearly a century of work. Part of the problem has been a gap between the work of scientists studying material degradation and the practices

Tolerances and Uncertainty in Robotic Systems

November 8, 2017
Author(s)
Frederick M. Proctor, John L. Michaloski, Marek Franaszek
The ability to be programmed for a wide range of tasks is what differentiates robots from dedicated automation. Consequently, robots can be faced with often-changing requirements and conditions. Conventional application development based on teach

Flux-tunable phase shifter for microwaves

November 7, 2017
Author(s)
Roope J. Kokkoniemi, Tuomas Ollikainen, Sakari Saarenpaa, Janne Kokkala, Ceren Dag, Mikko Mottonen, Russell Lake
We introduce a magnetic-flux-tunable phase shifter for propagating microwave photons, based on three equidistant superconducting quantum interference devices (SQUIDs) on a transmission line. We experimentally implement the phase shifter and demonstrate

Results of an International Comparison of Activity Measurements of 68Ge

November 7, 2017
Author(s)
Jeffrey T. Cessna, Ryan P. Fitzgerald, Brian E. Zimmerman, Lizbeth Laureano-Perez, Denis E. Bergeron
An international key comparison, identifier CCRI(II)-K2.Ge-68, has been performed. The National Institute of Standards and Technology (NIST) served as the pilot laboratory, distributing aliquots of a 68Ge/68Ga solution. Results for the activity

The power collection method for connection relations: Meixner polynomials

November 7, 2017
Author(s)
Howard Cohl, Michael Baeder, Roberto Costas-Santos, Wenqing Xu
We use and derive connection and connection-type relations for Meixner and Krawtchouk polynomials. These relations are used to derive generalizations of generating functions for these orthogonal polynomials. The coefficients of these generalized generating

Electronic Conductivity in a Porous Vanadyl Prussian Blue Analogue upon Air Exposure

November 6, 2017
Author(s)
Mary Anne Manumpil, Carmen Leal-Cervantes, Matthew R. Hudson, Craig Brown, Hemamala I. Karunadasa
Exposure to humid oxygen or ambient air affords a 5-or-der-of-magnitude increase in the electronic conductivity of a new Prussian blue analog incorporation Co(II) and V(IV)-oxo units. Oxidation produces a mixed-valence framework, where the oxygen exposure

Quantum Estimation of the Classical Gravitational Field

November 6, 2017
Author(s)
Emanuel H. Knill, T. G. Downes, G. J. Milburn, C. M. Caves, J. R. van Meter
Here we describe a quantum limit to measurement of the classical gravitational field. Specifically, we formulate the quantum Cramer-Rao lower bound for estimating the single parameter in any one- parameter family of spacetime metrics. We employ the locally

Design Patterns for Visualization-Based Tools in Sustainable Product Design

November 5, 2017
Author(s)
Deverajan Ramanujan, William Z. Bernstein, Karthik Ramani
Most design activities involve exploring and comparing similar existing designs. Thus, adopting an eco-conscious approach in the design exploration process can aid environmentally sustainable product design (SPD). A promising approach for supporting

The Effects of Burial Diagenesis on Multiscale Porosity in the St. Peter Sandstone: An Imagine, Small-Angle, and Ultra-Small-Angle Neutron Scattering Analysis

November 4, 2017
Author(s)
Lawrence M. Anovitz, Jared T. Freiburg, Matthew J. Wasbrough, David F. Mildner, Kenneth C. Littrell, Vitaliy Pipich, Jan Ilavsky
To examine the effects of burial diagenesis on heirarchical pore structures in sandstone and compare those with the effects of overgrowth formation, we obtained samples of St. Peter Sandstone from drill cores obtained in the Illinois and Michigan Basins

Deriving global mean OH and atmospheric lifetimes for ozone-depleting substances and greenhouse gases using observed CH3CCl3 and chemistry-climate models

November 3, 2017
Author(s)
Vladimir L. Orkin, Qing Liang, Martyn P. Chipperfield, Matthew Rigby, Olaf Morgenstern, Guus J. Velders, Luke Abraham, Sandip Dhomse, Eric L. Fleming, Steven C. Hardiman, Daniela Iachetti, Charles H. Jackman, Douglas E. Kinnison, Giovanni Pitari, Eugene Rozanov, Andrea Stenke, Fiona Tummon, James B. Burkholder
Tests using flux-based methyl chloroform (MCF) concentrations from four state-of-the-art chemistry-climate models (CCMs) in the two-dimensional 12-box Bayesian inversion model (IM) indicate that the 12-box IM provides a reasonable estimate of global mean
Displaying 12676 - 12700 of 73697
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