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Journals

NIST and Computer Security

April 4, 2014

Author(s)

William E. Burr, Hildegard Ferraiolo, David A. Waltermire

The US National Institute of Standards and Technology's highly visible work in four key areas--cryptographic standards, role-based access control...

Superconformal Copper Electrodeposition in Complexed Alkaline Electrolyte

April 3, 2014

Author(s)

Daniel Josell, Thomas P. Moffat

This paper examines superconformal filling of trenches during copper electrodeposition from alkaline cupric tartrate electrolyte. Extreme bottom-up filling of...

Thermal decomposition kinetics of the thermally stable jet fuels JP-7, JP-TS and JP-900

April 3, 2014

Author(s)

Raina V. Gough, Jason A. Widegren, Thomas J. Bruno

The global thermal decomposition kinetics of JP-7, JP-TS and JP-900 were studied. Decomposition reactions were performed at 375, 400, 425, and 450 °C in...

Characterizing the Hemming Performance of Automotive Aluminum Alloys with High-Resolution Topographic Imaging

April 1, 2014

Author(s)

Mark R. Stoudt, Joseph B. Hubbard, John E. Carsley, Susan E. Hartfield-W?nsch

A high-resolution quantitative surface analysis technique was used to evaluate the surface characteristics of two AA6xxx series aluminum automotive closure...

Characterizing the Hemming Performance of Automotive Aluminum Alloys With High-Resolution Topographic Imaging

April 1, 2014

Author(s)

Mark R. Stoudt, Joseph B. Hubbard, John E. Carsley, Susan E. Hartfield-W?nsch

The hemming performances of two AA6xxx series aluminum automotive closure panel alloys were evaluated, with and without a 10 % tensile pre-strain, in a...

Decision-Theoretic Aspects of Meta-Analysis

April 1, 2014

Author(s)

Andrew L. Rukhin

In the random-effects model of meta-analysis a canonical representation of the restricted likelihood function is obtained. The relationship between the common...

Influence of Internal Curing and Viscosity Modifiers on Resistance to Sulfate Attack

April 1, 2014

Author(s)

Dale P. Bentz, Jeffrey M. Davis, Max A. Peltz, Kenneth A. Snyder

Sulfate attack is one of the common degradation mechanisms for concrete in severe environments. While various strategies for minimizing sulfate attack are well...

Phase-Sensitive Small-Angle Neutron Scattering

April 1, 2014

Author(s)

Charles F. Majkrzak, Kathryn L. Krycka, Susan Krueger, Norman F. Berk, Paul A. Kienzle, Brian B. Maranville

A method is described for determining the neutron scattering length density distribution of a molecular scale object directly from phase-sensitive small angle...

Establishing an upper bound on contact resistivity of ohmic contacts to n-GaN nanowires

April 1, 2014

Author(s)

Paul T. Blanchard, Kristine A. Bertness, Todd E. Harvey, Norman A. Sanford

Contact resistivity ρ c is an important figure of merit in evaluating and improving the performance of electronic and optoelectronic devices. Due to the small...

Assessment of Conformity, Decision Rules and Risk Analysis

April 1, 2014

Author(s)

Steven D. Phillips, Michael Krystek

Measurement uncertainty has important economic consequences for calibration and inspection activities. In calibration reports, the magnitude of the uncertainty...

Measuring Stem Cell Dimensionality in Tissue Scaffolds

April 1, 2014

Author(s)

Carl G. Simon Jr., Sapun Parekh, Christopher K. Tison, Girish Kumar, Tanya M. Farooque, Charles H. Camp

Many 3D scaffold systems have evolved for tissue engineering, drug screening and in vitro tissue models. However, it is not clear which scaffolds provide a 3D...

Pneumatic valves in folded 2-D and 3-D fluidic devices made from plastic sheets and tapes

April 1, 2014

Author(s)

Gregory A. Cooksey, Francisco J. Atencia

We present a rapid prototyping technique that expands elastomeric valving capabilities to devices made from thin materials such as plastic films and tapes. A...

Areas of the U.S. wildland-urban interface threatened by wildfire during the 2001-2010 decade

April 1, 2014

Author(s)

Douglas Thomas, David Butry

The wildland-urban interface (WUI) is defined in terms of housing density and proximity to wildlands, yet its relevance seems to be only in conjunction with...

Color Error in the Digital Camera Image Capture Process

April 1, 2014

Author(s)

John Penczek, Paul A. Boynton, Jolene Splett

The color error of images taken by digital cameras is evaluated with respect to its sensitivity to the image capture conditions. A parametric study was...

Advances in source technology for focused ion beam instruments

April 1, 2014

Author(s)

Noel Smith, John Notte, Adam V. Steele

Owing to the development of new ion source technology, users of focused ion beams (FIBs) have an increasingly wide array of uniquely capable platforms to choose...

CO₂-Responsive Microemulsions Based on Reactive Ionic Liquids

April 1, 2014

Author(s)

Paul Brown, Matthew John Wasbrough, Burcu E. Gurkan, T. Alan Hatton

We demonstrate that the nanodomains within a ternary system consisting of oil, surfactant and a new reactive ionic liquid can be tuned reversibly upon exposure...

N-methylmesoporphyrin IX fluorescence as a reporter of strand orientation in guanine quadruplexes

April 1, 2014

Author(s)

Navin C. Sabharwal, Victoria Savikhin, Joshua Turek-Herman, John M. Nicoludis, Veronika Szalai, Liliya Yatsunyk

Guanine quadruplexes (GQ) are four-stranded DNA structures formed by guanine-rich DNA sequences. Formation of GQs inhibits cancer cell survival, but detecting...

Path Loss and Large-Scale Site and Frequency Diversity in Urban Peer-to-Peer Channels for Six Public Safety Frequency Bands

April 1, 2014

Author(s)

David W. Matolak, Christopher L. Holloway, Kate Remley, Qian Zhang, Qiong Wu

We report on peer-to-peer (ground-based) large scale wireless channel characteristics for an urban environment in six public safety bands, for five simultaneous...

Common-Path Method for Laser Tracker Ranging Calibration

March 31, 2014

Author(s)

Christopher J. Blackburn, Daniel S. Sawyer, Craig M. Shakarji

We present an alternative to the back-to-back method of testing laser tracker ranging systems. Our approach uses a common air path for both the measurement and...

Hydrogen traps in the outgassing model of a stainless steel vacuum chamber

March 31, 2014

Author(s)

Robert F. Berg

This article describes a model for hydrogen outgassing into a stainless steel vacuum chamber. It accounts for the geometry of the chamber components, the...

Determination of the Planck constant using a watt balance with a superconducting magnet system at the National Institute of Standards and Technology

March 31, 2014

Author(s)

Stephan Schlamminger, Darine El Haddad, Frank C. Seifert, Leon S. Chao, David B. Newell, Richard L. Steiner, Jon R. Pratt

In the past two years measurements were performed with a watt balance at the National Institute of Standards and Technology (NIST) to determine the Planck...

Influence Of Sorbitol on Protein Crowding in Solution and Freeze-Concentrated Phases

March 31, 2014

Author(s)

Sheila Khodadadi, Nicholas James Clark, Arnold McAuley, Viviana Cristiglio, Joseph E. Curtis, Evgenyi Y. Shalaev, Susan T. Krueger

Protein stability during processing and storage is of great challenge for biotechnology and pharmaceutical industries. Polyhydroxy compounds are well-known cryo...

Decrease in reflectance of vertically-aligned carbon nanotubes after oxygen plasma treatment

March 30, 2014

Author(s)

Nathan A. Tomlin, Alexandra Curtin, John H. Lehman, Malcolm G. White

Oxygen plasma treatment was used to lower the reflectance of multiwall vertically-aligned carbon nanotubes (VACNT). Specular reflectance measurements at an...

Quantum-noise-limited cavity ring-down spectroscopy

March 29, 2014

Author(s)

David Long, Adam Fleisher, Szymon S. Wojtewicz, Joseph Hodges

Spectroscopic techniques with ultra-high sensitivity allow for the study of a wide variety of physical and chemical phenomena, ranging from the interrogation of...

Characterization of Emerging Ambient Pressure Mass Spectrometric Techniques using Time-of-Flight Secondary Ion Mass Spectrometry

March 28, 2014

Author(s)

Shinichiro Muramoto, Thomas P. Forbes, Matthew E. Staymates, John G. Gillen

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used to characterize the desorption performance of two emerging ambient ionization mass...

Potential artifacts when evaluating the ecotoxicological effects of nanomaterials

March 28, 2014

Author(s)

Elijah J. Petersen, Marina Dobrovolskaia, Theodore B. Henry, Jian Zhao, Robert I. MacCuspie, Teresa L. Kirschling, Baoshan Xing, Vincent A. Hackley, Jason White

Engineered nanomaterials (ENMs) have a significant commercial potential for ENM-enable products as a result of novel or enhanced properties. However, the unique...

Spin Biochemistry Modulates Reactive Oxygen Species (ROS) Production by Radio Frequency Magnetic Fields

March 28, 2014

Author(s)

Robert J. Usselman

The effects of weak magnetic fields on the biological production of reactive oxygen species (ROS) from intracellular superoxide (O2−) and extracellular...

Thermoresponsive PNIPAAM Bottlebrush Polymers with Tailored Side-Chain Length and End-Group Structure

March 28, 2014

Author(s)

Xianyu Li, Hadi ShamsiJazeyi, Stacy L. Pesek, Aditya Agrawal, Boualem Hammouda, Rafael Verduzco

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

Determination of the Effective Transverse Coherence of the Neutron Wave Packet as Employed in Reflectivity Investigations of Condensed-Matter Structures. I. Measurements

March 27, 2014

Author(s)

Charles F. Majkrzak, Christopher Metting, Brian B. Maranville, Joseph A. Dura, Sushil K. Satija, Terrence J. Udovic, Norman F. Berk

The primary purpose of this investigation is to determine the effective coherent extent of the neutron wave packet transverse to its mean propagation vector k...

The hyperfine Paschen-Back Faraday effect

March 26, 2014

Author(s)

Svenja A. Knappe, M.A. Zentile, Rebecca Andrews, L. Weller, C.S. Adams, I.G. Hughes

We investigate experimentally and theoretically the Faraday effect in an atomic medium in the hyperfine Paschen-Back regime, where the Zeeman interaction is...

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