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Journals

The Spectrum of Thorium from 250 nm to 5500 nm: Ritz Wavelengths and Optimized Energy Levels

February 6, 2014

Author(s)

Stephen L. Redman, Gillian Nave, Craig J. Sansonetti

We have made precise new observations of the spectrum emitted by a thorium-argon hollow cathode lamp in the region 350 nm to 1175 nm using a high-resolution...

International Comparison of a Hydrocarbon Gas Standard at the Picomol per Mol Level

February 6, 2014

Author(s)

George C. Rhoderick, David L. Duewer, Eric Apel, Annarita Baldan, Bradley Hall, Alice Harling, Detlev Helmig, Gwi S. Heo, Jacques Hueber, Mi E. Kim, Yong D. Kim, Benjamin Miller, Stephen Montzka, Daniel Reimer

Studies of climate change increasingly recognize the diverse influences of hydrocarbons in the atmosphere, including roles in particulates and ozone formation...

Measuring Material Microstructure under Flow Using 1-2 Plane flow-Small Angle Neutron Scattering

February 6, 2014

Author(s)

Dave Binkley, P. Douglas Godfrin, Norman J. Wagner, Aaron P. R. Eberle, Paul Butler, Lionel Porcar

A new small-angle neutron scattering (SANS) sample environment optimized for studying the microstructure of complex fluids under simple shear flow is presented...

Designing High-Performance PbS and PbSe Nanocrystal Electronic Devices through Stepwise, Post-Synthesis, Colloidal Atomic Layer Deposition

February 6, 2014

Author(s)

Soong Ju Oh, Nathaniel E. Berry, Hi-Hyuk Choi, E. A. Gaulding, Hangfei Lin, Taejong Paik, Benjamin T. Diroll, Shinichiro Muramoto, Murray B. Christopher, Cherie R. Kagan

We report a facile, solution based, post synthetic colloidal atomic layer deposition (PS-cALD) process to engineer the surface stoichiometry and therefore...

Optical phase noise from atmospheric fluctuations and its impact on optical time-frequency transfer

February 5, 2014

Author(s)

Laura C. Sinclair, Fabrizio R. Giorgetta, William C. Swann, Esther Baumann, Ian R. Coddington, Nathan R. Newbury

The time of flight for a laser beam through the atmosphere will fluctuate as the path-averaged index of refraction varies with atmospheric turbulence, air...

Measuring the sulfur content and corrosivity of North American petroleum with the advanced distillation curve method

February 5, 2014

Author(s)

Peter Y. Hsieh, Thomas J. Bruno

Petroleum is a complex fluid whose sulfur content varies considerably depending on its place of origin. Sour crude petroleum, which contains more than 0.5 %...

Structure and X-ray Reference diffraction patterns of (Ba6-xSrx)R2Co4O15 (x=1, 2) (R=Lanthanides)

February 4, 2014

Author(s)

Winnie K. Wong-Ng, Guangyao Liu, Yonggao Y. Yan, James A. Kaduk

The structure and X-ray patterns of two series of barium lanthanide cobaltites, namely, Ba4Sr2R2Co4O15 (R=La, Nd, Sm, Eu, Gd, Dy), and Ba5SrR2Co4O15 (R= La, Nd...

CPTAC Studies 1 and 5: dissecting variability in multi-site LC-MS/MS proteomics through quality metrics and robust hierarchical multivariate statistics

February 4, 2014

Author(s)

Stephen E. Stein, David M. Bunk, Xia Wang, Matthew Chambers, Lorenzo J. Vega-Montoto, David L. Tabb

Shotgun proteomics experiments integrate a complex sequence of processes, any of which can introduce variability. Quality metrics computed from LC-MS/MS data...

Order by Disorder Spin Wave Gap in the XY Pyrochlore Magnet Er₂Ti₂O₇

February 4, 2014

Author(s)

Kathryn Aileen Ross, Yiming Qiu, John R. Copley, H. A. Dabkowska, B. D. Gaulin

The recent determination of a robust spin Hamiltonian for the anti-ferromagnetic XY pyrochlore Er 2Ti 2O 7 reveals a most convincing case of the ¿order by...

Third-order antibunching from an imperfect single-photon source

February 4, 2014

Author(s)

Martin J. Stevens, Scott C. Glancy, Sae Woo Nam, Richard P. Mirin

We measure second- and third-order temporal coherences, g (2)(τ) and g (3)(τ1, τ2), of an optically excited single-photon source: an InGaAs quantum dot in a...

Composite Floor Systems under Column Loss: Collapse Resistance and Tie Force Requirements

February 4, 2014

Author(s)

Joseph Main

This paper presents a computational assessment of the performance of steel gravity framing systems with single-plate shear connections and composite floor slabs...

A four-pixel single-photon pulse-position array fabricated from WSi superconducting nanowire single- photon detectors

February 3, 2014

Author(s)

Varun B. Verma, Robert D. Horansky, Francesco Marsili, Jeffrey Stern, Matthew Shaw, Adriana E. Lita, Richard P. Mirin, Sae Woo Nam

We demonstrate a scalable readout scheme for an infrared single-photon pulse-position camera consisting of WSi superconducting nanowire single-photon detectors...

Head and Media Challenges for 3 Tb/in² Microwave Assisted Magnetic Recording

February 3, 2014

Author(s)

Thomas J. Silva, Justin M. Shaw, Hans T. Nembach, Mike Mallary, Kumar Srinivasan, Gerado Bertero, Dan Wolf, Christian Kaiser, Michael Chaplin, Mahendra Pakala, Leng Qunwen, Yiming Wang, Carl Elliot, Lui Francis

A specific design for Microwave Assisted Magnetic Recording (MAMR) at about 3Tb/in 2 (0.47 Tb/cm 2 or 4.7 Pb/m 2) is discussed in detail to highlight the...

The Importance of Entropy to Information Security

February 3, 2014

Author(s)

Apostol T. Vassilev, Timothy Hall

The strength of cryptographic keys is an active challenge in academic research and industrial practice. In this paper we discuss the entropy as fundamentally...

IT Risks

February 3, 2014

Author(s)

Linda Wilbanks, D. Richard Kuhn, Wes Chou

Risk management is a common phrase when managing information, from the CISO to the programmer. We acknowledge that risk management is the identification...

Software Testing - Guest Editor Introduction

February 3, 2014

Author(s)

Renee Bryce, D. Richard Kuhn

This special issue presents papers that focus on important problems within the Software Testing community.

Ultra-Sensitive Chip-Based Photonic Temperature Sensor Using Ring Resonator Structures

February 3, 2014

Author(s)

Haitan Xu, Mohammad Hafezi, Jingyun Fan, Jacob Taylor, Gregory F. Strouse, Zeeshan Ahmed

Temperature is one of the most measured quantity in the world, second only to time. Recently there has been considerable interest in developing photonic...

Improvements in the characterization of actinides targets by low solid-angle counting

February 2, 2014

Author(s)

David M. Gilliam, Andrew T. Yue

In a paper presented in the Proceedings of the 19th World Conference of the INTDS, 1998, the results of a blind comparison between groups at NIST and the IRMM...

Voltammetric Monitoring of Protein Aggregation from Solution Using Tris-(2,2'-Bipyridine) Osmium (II) Chloride as an Electrocatalytic Mediator

February 2, 2014

Author(s)

Napoleon E. Tercero, Joseph A. Kotarek

The present work evaluates the feasibility of tracking protein aggregation voltammetrically by taking advantage of the intrinsic electroactivity of tyrosine...

Interpreting the semantics of GD&T specifications of a product for tolerance analysis

February 1, 2014

Author(s)

Mehmet I. Sarigecilia, Utpal Roy, Sudarsan Rachuri

The representation and management of product information in its life cycle requires standardized data exchange protocols. Standard for exchange of product model...

The effect of Acetobacter sp. and a sulfate-reducing bacterial consortium from ethanol fuel environments on fatigue crack propagation in pipeline and storage tank steels

February 1, 2014

Author(s)

Jeffrey W. Sowards, Charles H. Williamson, Timothy S. Weeks, Joseph D. McColskey, John R. Spear

This study evaluated the effects of microbiologically influenced corrosion (MIC) on fatigue crack growth of candidate materials useful in expanding bioethanol...

Combined Fitting of Small- and Wide-Angle X-ray Total Scattering Data from Nanoparticles: Benefits and Issues

February 1, 2014

Author(s)

Igor Levin, Anton Gagin, Andrew J. Allen

Simultaneous fitting of small- and wide-angle total X-ray scattering data for nanoparticles has been explored using both simulated and experimental signals. The...

The Hafnium-Platinum Phase Diagram

February 1, 2014

Author(s)

Judith K. Stalick, Richard M. Waterstrat

Phase relationships were determined in the Hf-Pt system at temperatures up to 1690°C using both metallographic and neutron Rietveld refinement techniques. An...

A comparison of literature models for the oxidation of normal heptane

February 1, 2014

Author(s)

David A. Sheen, Wing Tsang

The development of detailed chemical kinetic models has proceeded unabated since the pioneering work of Dixon-Lewis and coworkers forty-five years ago. In that...

Quantitative X-Ray Powder Diffraction Analysis of Portland Cements: Proficiency Testing for Laboratory Assessment

February 1, 2014

Author(s)

Paul E. Stutzman

Quantitative x-ray powder diffraction analysis (QXRD) is being used within the cement industry for phase characterization of hydraulic cement. The current ASTM...

Wave Packet Scattering from Time-Varying Potential Barriers in One Dimension

February 1, 2014

Author(s)

Robert M. Dimeo

We summarize a method of solution of the time-dependent Schrodinger equation that incorporates adsorbing boundary conditions and a method for extracting the...

A New NIST Primary Standardization of 18F

February 1, 2014

Author(s)

Ryan P. Fitzgerald, Brian E. Zimmerman, Denis E. Bergeron, Jeffrey T. Cessna, Leticia S. Pibida, Denise S. Moreira

A new primary standardization of 18F by NIST is reported. The standard is based on live-timed beta- gamma anticoincidence counting with confirmatory...

Distributed Deployment Algorithms for Improved Coverage in a Network of Wireless Mobile Sensors

February 1, 2014

Author(s)

Kamran Sayrafian, Vladimir V. Marbukh, Hamid Mahboubi, Kaveh Moezzi, Amir Aghdam

In this paper, sensor deployment strategies are developed for effective coverage in wireless sensor networks. In the proposed algorithms, the sensors find...

Effects of Intermicellar Interactions on the Dissociation of Block Copolymer Micelles: SANS and NMR Studies

February 1, 2014

Author(s)

Gang Cheng, Boualem Hammouda, Dvora Perahia

The effects of inter-micellar interactions on the dissociation of block copolymer micelles of polystyrene-b-polyisoprene in a selective solvent, decane, were...

Polystyrene-block-Polyisoprene Diblock-Copolymer Micelles: Coupled Pressure and Temperature Effects

February 1, 2014

Author(s)

Gang Cheng, Boualem Hammouda, Dvora Perahia

The structural changes of diblock copolymer micelles under pressure from (200-16,000) psi were investigated using small-angle neutron scattering (SANS)...

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