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Search Publications

NIST Authors in Bold

Displaying 11601 - 11625 of 74237

MEMS non-absorbing electromagnetic power sensor employing the effect of radiation pressure

September 8, 2018
Author(s)
Ivan Ryger, Aly Artusio-Glimpse, Paul A. Williams, Gordon A. Shaw, Matt Simons, Christopher L. Holloway, John H. Lehman
We demonstrate a compact electromagnetic power sensor based on force effects of electromagnetic radiation onto a highly reflective mirror surface. Unlike the conventional power measurement approach, the photons are not absorbed and can be further used in

Nano-Sized Ferrite Particles for Magnetic Resonance Imaging Thermometry

September 8, 2018
Author(s)
Janusz H. Hankiewicz, J A. Stoll, John Stroud, J Davidson, K L. Livesey, K Tvrdy, Alexana Roshko, Stephen E. Russek, Karl Stupic, P Bilski, Robert E. Camley
Recently, we reported the use of magnetic particles as temperature indicators in magnetic resonance imaging thermometry (tMRI). In this method, the brightness of the MR image changes with temperature due to a temperature-dependent magnetic field

Data Quality and Assessment, Validation Methods and Error Propagation through the Simulation Software: Report from the Round-Table Discussion at the 10th World Congress of Chemical Engineering in Barcelona (October 1-5, 2017)

September 7, 2018
Author(s)
Paul M. Mathias, Ana Soto, Ljudmila Fele-Zilnik, Jean-Charles de Hemptinne, Ala Bazyleva, Jens Abildskov
The issues of data quality and propagation of data uncertainties into process design and plant uncertainties are of great current interest, and hence two Working Parties of the European Federation of Chemical Engineers (EFCE) organized a Round Table

High-throughput assessment of vacancy formation and surface energies of materials using classical force-fields

September 7, 2018
Author(s)
Kamal Choudhary, Adam J. Biacchi, Supriyo Ghosh, Lucas M. Hale, Angela R. Hight Walker, Francesca M. Tavazza
In this work, we present an open access database for surface and vacancy-formation energies using classical force-fields (FFs). These quantities are essential in understanding diffusion behavior, nanoparticle formation and catalytic activities. FFs are

IT Asset Management : Financial Services

September 7, 2018
Author(s)
James M. Banoczi
While a physical asset management system can tell you the location of a computer, it cannot answer questions like, "What operating systems are our laptops running?" and "Which devices are vulnerable to the latest threat?" An effective IT asset management

Low-GWP Alternative Refrigerant Blends for HFC-134a

September 7, 2018
Author(s)
Piotr A. Domanski, Mark O. McLinden, Ian H. Bell, Gregory T. Linteris
The goal of this study was to identify non-flammable, non-toxic, low global-warming-potential (GWP) replacements for HFC-134a in an air-conditioning system that would maintain the energy efficiency and capacity. A prior exhaustive work demonstrated that

Mechanical characterization of planar springs for compact radiation pressure power meters

September 7, 2018
Author(s)
Alexandra B. Artusio-Glimpse, Ivan Ryger, Paul A. Williams, Kyle A. Rogers, Daniel W. Rahn, Andrew J. Walowitz, John H. Lehman
Counter to conventional methods of measuring laser optical power, radiation pressure-based power meters operate by reflection rather than absorption. This provides an opportunity for in situ, non-destructive total beam power measurement. Compact radiation

The Economic Impacts of the Advanced Encryption Standard, 1996-2017

September 7, 2018
Author(s)
David P. Leech, Stacey Ferris, John T. Scott
Cryptography is a branch of applied mathematics concerned with developing complex algorithms for scrambling information ("plaintext") into an indecipherable version of that information ("ciphertext") and back to plaintext. The basics of cryptography as it

Lifetime of the metastable 2 P 1/2 state of F-like Ar 9+ isolated in a compact Penning trap

September 6, 2018
Author(s)
Samuel M. Brewer, Joan M. Dreiling, Nicholas D. Guise, Shannon M. Hoogerheide, Aung Naing, Joseph N. Tan
Multiple-ionized atoms can be captured at low energy in a compact Penning trap, allowing the isolation of a single charge state to measure the radiative lifetime of an atomic state that decays via weakly allowed transitions. Such a measurement is reported

Quantifying Information Exposure in Internet Routing

September 6, 2018
Author(s)
Peter M. Mell, Assane Gueye, Christopher A. Schanzle
Data sent over the Internet can be monitored and manipulated by intermediate entities in the data path from the source to the destination. For unencrypted communications (and some encrypted communications with known weaknesses), eavesdropping and man-in

Resolving Interfacial Charge Transfer in Titanate Superlattices using Resonant X-Ray Reflectometry

September 6, 2018
Author(s)
Ryan F. Need, P. B. Marshall, E. Weschke, Alexander J. Grutter, Dustin Allen Gilbert, E. Arenholz, P. Shafer, S. Stemmer, Stephen D. Wilson
Oxide interfaces, where strong electron-electron correlations lead to emergent phase behavior, have been the subject of intense study in recent years. However, the buried nature of heterointerfaces often makes them challenging to probe directly. Addressing

Transition probabilities of Co II, weak lines to the ground and low metastable levels

September 5, 2018
Author(s)
James E. Lawler, T. Feigenson, Chris Sneden, John J. Cowan, Gillian Nave
New branching fraction measurements based primarily on data from a cross dispersed echelle spectrometer are reported for 84 lines of Co II. The branching fractions for 82 lines are converted to absolute atomic transition probabilities using radiative

Urinary Phthalate Metabolites in Common Bottlenose Dolphins (Tursiops truncatus) from Sarasota Bay, FL, USA

September 5, 2018
Author(s)
Leslie Hart, Barbara Beckingham, Randall Wells, Moria Alten-Flagg, Kerry Wischusen, Amanda Moors, John Kucklick, Pisarski Emily, Ed Wirth
Phthalates are chemical additives to common consumer goods including cleaning products, cosmetics, personal care products, and plastic. Because they are not chemically bound to these products and are widely used, the potential for environmental

Characterization and operation optimization of large field-of-view optical interferometers using binary pseudorandom array test standards

September 4, 2018
Author(s)
Valeriy V. Yashchuk, Sergey Babin, Stefano Cabrini, Ulf Griesmann, Ian Lacey, Keiko Munechika, Carlos Pina Hernandez, Quandou Wang
Recently, a technique for calibration of the Modulation Transfer Function (MTF) of a broad variety of metrology instrumentation has been established. The technique is based on test samples structured according to binary pseudo-random (BPR) one-dimensional
Displaying 11601 - 11625 of 74237
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