Journals

Direct Measurements Show Decreasing Methane Emissions from Natural Gas Local Distribution Systems in the United States

March 31, 2015

Author(s)

Antonio M. Possolo, James R. Whetstone

Fugitive methane emissions from natural gas distribution systems are a significant source of anthropogenic greenhouse gases. Here we present data from a

Combinatorial Coverage as an Aspect of Test Quality

March 31, 2015

Author(s)

David R. Kuhn, Raghu N. Kacker, Yu Lei

There are relatively few good methods for evaluating test set quality, after ensuring basic requirements traceability. Structural coverage, mutation testing

First measurements of the flux integral with the new NIST-4 watt balance

March 31, 2015

Author(s)

Darine El Haddad, Frank Seifert, Leon Chao, Yusi A. Cao, Georgio A. Sineriz, Jon R. Pratt, David B. Newell, Stephan Schlamminger

In early 2014, construction of a new watt balance, named NIST-4, has started at the National Institute of Standards and Technology (NIST). In a watt balance

Tuning the size of gold nanoparticles with repetitive oxidation-reduction cycles

March 31, 2015

Author(s)

Steve Y. Rhieu, Vytas Reipa

A simple method to control the size of gold nanoparticles (AuNP) using repetitive oxidation-reduction cycles is described. First, AuNP are shown to be readily

Fractional Quantum Hall States of Rydberg Polaritons

March 31, 2015

Author(s)

Mohammad F. Maghrebi, Norman Y. Yao, Mohammad Hafezi, Thomas Pohl, Ofer Firstenberg, Alexey Gorshkov

We propose a scheme for realizing fractional quantum Hall states of light. In our scheme, photons of two polarizations are coupled to Rydberg atoms via

Dense nanoimprinted silicon nanowire arrays with passivated axial p-i-n junctions for photovoltaic applications

March 31, 2015

Author(s)

Peng Zhang, Pei Liu, A. Zaslavsky, D. Pacifici, Jong Y. Ha, Sergiy Krylyuk, Albert Davydov

We report on the fabrication and photovoltaic characteristics of vapor-liquid-solid (VLS) grown vertical arrays of silicon axial p-i-n oxide-passivated nanowire

Magic wavelengths for the 5s-18s transition in rubidium

March 30, 2015

Author(s)

Elizabeth A. Goldschmidt, Roger C. Brown, James V. Porto, Robert Wyllie, Silvio B. Koller, M S. Safronova, Ulyana I. Safronova, David Norris

Magic wavelengths, for which there is no differential ac Stark shift for the ground and excited state of the atom, allow trapping of excited Rydberg atoms

Positive Operator-Valued Measure reconstruction of a beam-splitter tree based photon-number- resolving detector

March 30, 2015

Author(s)

Sergey V. Polyakov, Fabrizio Piacentini, Filippo Levi, A Avella, M Lopez, Stefan Kuck, Ivo P. Degiovanni, Giorgio Brida, Marco Genovese

Here we present a reconstruction of the Positive Operator-Value Measurement of a photon-number-resolving detector comprised of three 50:50 beamsplitters in a

Planar electrical-substitution carbon nanotube cryogenic radiometer

March 30, 2015

Author(s)

Nathan A. Tomlin, Malcolm G. White, Igor Vayshenker, Solomon I. Woods, John H. Lehman

Rapid Detection of Sugar Alcohol Precursors and Corresponding Nitrate Ester Explosives using Direct Analysis in Real Time Mass Spectrometry

March 30, 2015

Author(s)

Edward Sisco, Thomas Forbes

This work highlights the rapid detection of nitrate ester explosives and their sugar alcohol precursors by direct analysis in real time mass spectrometry (DART

Exponential scaling of clock stability with atom number

March 28, 2015

Author(s)

Till P. Rosenband, David R. Leibrandt

In trapped-atom clocks, the primary source of decoherence is often the phase noise of the oscillator. In this case, it is theoretically possible to derive

Design and Performance of Ternary Blend High-Volume Fly Ash Concretes of Moderate Slump

March 27, 2015

Author(s)

Dale P. Bentz, Scott Z. Jones, Kenneth A. Snyder

One approach to increasing the sustainability of concrete construction is to replace a significant portion of the ordinary portland cement (OPC) with a

A comparison of 3D shape retrieval methods based on a large-scale benchmark supporting multimodal queries

March 27, 2015

Author(s)

Afzal A. Godil

Large-scale 3D shape retrieval has become an important research direction in content-based 3D shape retrieval. To promote this research area, two Shape

Interactions of Microorganisms with Polymer Nanocomposites Containing Different Loadings of Oxidized Single and Multi-walled Carbon Nanotubes

March 27, 2015

Author(s)

David G. Goodwin , Kris M. Marsh, Iruhany B. Sosa, Julianne B. Payne, Justin Gorham, Edward J. Bouwer, D H. Fairbrother

The environmental fate and impact of polymer nanocomposites (PNCs) containing carbon nanotubes (CNTs) will depend upon their interactions with microorganisms

Equation of State for the Thermodynamic Properties of 1,1,2,2,3-Pentafluoropropane (R-245ca)

March 26, 2015

Author(s)

Eric W. Lemmon, Yong Zhou

hydrofluorocarbon (HFC) refrigerant, are presented. The properties are based on an equation of state (EOS) expressed in terms of the Helmholtz energy as a

Quantitative performance of internal standard platforms for absolute protein quantification using MRM-MS

March 26, 2015

Author(s)

Kerry M. Bauer, Illarion V. Turko, Karen W. Phinney

Isotope dilution mass spectrometry involves the addition of known quantities of isotope-labeled standards, that mimic native molecules, to biological samples

A Fundamental Equation of State for 1,1,1,3,3-Pentafluoropropane (R-245fa)

March 26, 2015

Author(s)

Ryo Akasaka, Yong Zhou, Eric Lemmon

A new fundamental equation of state explicit in the Helmholtz energy is presented for 1,1,1,3,3 pentafluoropropane (R 245fa), based on recent experimental data

Measurement of oxidatively induced DNA damage and its repair by mas spectrometric techniques

March 25, 2015

Author(s)

M Miral Dizdar, Erdem Coskun, Pawel Jaruga

Oxidatively induced damage caused by free radicals and other DNA-damaging agents generate a plethora of products in DNA of living organisms. There is mounting

Linkage Isomerization via Geminate Cage or Biomolecular Mechanisms: Time-Resolved Investigations of an Organometallic Photochrome

March 25, 2015

Author(s)

Edwin J. Heilweil, Kristy M. Dewitt, Tung T. To, Theodore J. Burkey

A metal center reversibly migrates from a pyridinyl group to a nitrile group in the light driven linkage isomerization of dicarbonyl(3-cyanomethylpyridine-N3)

Early observations of macroscopic quantum jumps in single atoms

March 25, 2015

Author(s)

Wayne M. Itano, James C. Bergquist, David J. Wineland

The observation of intermittent fluorescence of a single atomic ion, a phenomenon better known as 'macroscopic quantum jumps,' was an important early scientific

Data Formats for Elementary Gas Phase Kinetics: Part 2. Unique Representations of Reactions

March 25, 2015

Author(s)

Donald R. Burgess Jr., Jeffrey A. Manion, Carrigan J. Hayes

A method of extending the IUPAC International Chemical Identifier (InChI) to describe and identify elementary reactions in a standard computer readable notation

Enhanced Ordering in Thin Block Copolymer Films Through a Change of Polymer Molecular Mass and the Resultant Thermodynamic Driving Force for Ordering

March 25, 2015

Author(s)

Jack F. Douglas, Xiaohua Zhang, Alamgir Karim

We demonstrate that an increase of the molecular mass of a cylinder-forming PS-PMMA block copolymer (BCP), and thus the Flory-Huggins interaction strength N

An improved result on the measurement of the Avogadro constant from a 28Si crystal

March 25, 2015

Author(s)

Yasushi Azuma, G Barat, Guido Bartl, Horst Bettin, Michael Borys, I Busch, L Cibik, G D' Agostino, K Fujii, H Fujimoto, A Hioki, Michael Krumrey, U Kuetgens, N Kuramoto, Giovanni Mana, E Massa, R Meess, Shigeki Mizushima, T Narukawa, Arnold Nicolaus, Axel Pramann, Savelas A. Rabb, Olaf Rienitz, C Sasso, M Stock, Robert D. Vocke Jr., A Waseda, S Zakel

In this paper new results of an international research project aimed at determining the Avogadro constant by counting the atoms in an isotopically enriched

Evaluating Measurements of Carbon Dioxide Emissions Using a Precision Source - a Natural Gas Burner

March 24, 2015

Author(s)

Rodney A. Bryant, Matthew F. Bundy, Ruowen Zong

A natural gas burner has been used as a precise and accurate source for generating large quantities of carbon dioxide (CO2) to evaluate emissions measurements

Model colloid system for interfacial sorption kinetics

March 24, 2015

Author(s)

Paul NMN Salipante, Steven D Hudson

Adsorption kinetics of nanometer scale molecules, such as proteins at interfaces, is usually determined through measurements of surface coverage. Their small

Update on the MiniCLEAN Dark Matter Experiment

March 24, 2015

Author(s)

Kevin J. Coakley, K. Rielage, M. Akashi-Ronquest, M. Bodmer, R. Bourque, B. Buck, A. Butcher, T. Caldwell, Y. Chen, F. A. Duncan, E. Flores, J. A. Formaggio, D. Glaster, F. Giuliani, M. Gold, E. Grace, J. Griego, N. Guerrero, V. Guiseppe, R. Henning, A. Hime, S. Jaditz, C. Kachulis, E. Kearns, J. Kelsey, J. R. Klein, A. Latorre, I. Lawson, O. Li, P. Liimatainen, S. Linden, F. Lopez, K. McFarlane, D. N. McKinsey, S. MacMullin, A. Mastbaum, D.-M. Mei, J. Monroe, J. A. Nikkel, J. Oertel, G. D. Orebi Gann, K. Palladino, G. Perumpilly, L. Rodriguez, R. Schnee, S. Seibert, J. Walding, B. Wang, J. Wang, C. Zhang

The direct search for dark matter is entering a period of increased sensitivity to the hypothetical Weakly Interacting Massive Particle (WIMP). One such

"Weighing" a Gas With Microwave and Acoustic Resonances

March 24, 2015

Author(s)

Keith A. Gillis, James B. Mehl, James W. Schmidt, Michael R. Moldover

With calibrations of large flow meters in mind, we established the feasibility of determining the mass Mof argon gas contained within a 0.3 m 3 commercially

Frequency shifts in NIST Cs primary frequency standards due to transverse RF field gradients

March 23, 2015

Author(s)

Steven R. Jefferts, Neil Ashby, Stephan E. Barlow, Thomas P. Heavner

A single-particle Green's function (propagator) is introduced to study the deflection of laser-cooled Cesium atoms in an atomic fountain due to RF field

Interplay of particle shape and suspension properties: a study of cube-like particles

March 20, 2015

Author(s)

Debra J. Audus, Ahmed M. Hassan, Edward J. Garboczi, Jack F. Douglas

With advances in anisotropic particle synthesis, particle shape is now a feasible parameter for tuning suspension properties. However, there is a need to

Open-air, broad-bandwidth trace gas sensing with a mid-infrared optical frequency comb

March 20, 2015

Author(s)

Lora L. Nugent-Glandorf, Scott A. Diddams

A mid-Infrared frequency comb is produced via an optical parametric oscillator (OPO) pumped by an amplified 100 MHz Yb:fiber mode-locked laser. We use this