Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

Preparation and Certification of Hydrogen in Titanium Alloy Standard Reference Materials

August 4, 2012

Author(s)

Rick L. Paul, Richard M. Lindstrom

A series of three Hydrogen in Titanium Alloy Standard Reference Materials (SRMs 2452, 2453, and 2454) were prepared with hydrogen mass fractions bracketing the...

Optimization of processing method for recovery of bacteria from wipes used in biological surface sampling

August 3, 2012

Author(s)

Autumn S. Downey, Sandra M. Da Silva, Jayne B. Morrow, James J. Filliben, Nathanael D. Olson

Environmental sampling for microbiological contaminants is a key component of hygiene monitoring and risk characterization practices utilized across diverse...

Ti_(12.5)Zr_(21)V_(10)Cr_(8.5)Mn_(x)Co_(1.5)Ni_(46.5-x)AB_(2)-type metal hydride alloys for electrochemical storage application: Part 1. Structural characteristics

August 3, 2012

Author(s)

Leonid A. Bendersky, Ke Wang, Igor Levin, Dale E. Newbury, K. Young, B. Chao, Adam A. Creuziger

The microstructures of a series of AB_(2)-based metal hydride alloys (Ti_(12.5)Zr_(21)V_(10)Cr_(8.5)Mn_(x)Co_(1.5)Ni_(46.5-x)) designed to have different...

Dual-channel, single-photon upconversion detector at 1.3 μm

August 3, 2012

Author(s)

Jason S. Pelc, Paulina Kuo, Oliver T. Slattery, Lijun Ma, Xiao Tang, Martin M. Fejer

We demonstrate efficient, single-photon upconversion detection of two wavelengths in the 1300-nm band. The upconversion detector is based on a phase-modulated...

Data in the 21st Century

August 2, 2012

Author(s)

Ursula R. Kattner

Data have always been important in the field of materials science and engineering. Important attributes and properties for such databases to fulfill data...

Polymer-Fullerene Mixing in Organic Solar Cells

August 2, 2012

Author(s)

Hyun Wook Ro, Bulent Akgun, Regis J. Kline, Chad R. Snyder, Sushil K. Satija, Christopher L. Soles, Dean M. DeLongchamp, Michael F. Toney, Alexander L. Ayzner, Brendan T. O'Connor, Matthew Hammond

The mixing behavior of the hole and electron transporting materials in bulk heterojunction (BHJ) organic photovoltaic (OPV) blends plays a key role in...

Variable Projection for Nonlinear Least Squares Problems

August 2, 2012

Author(s)

Dianne M. O'Leary, Bert W. Rust

The variable projection algorithm of Golub and Pereyra (1973) has proven to be quite valuable in the solution of nonlinear least squares problems in which a...

Sensing Trace Amounts of Nitro-Aromatic Explosives using Nanowire-Nanocluster Hybrids

August 1, 2012

Author(s)

Geetha G. Aluri, Abhishek Motayed, Albert Davydov, Vladimir P. Oleshko, Kristine A. Bertness, Norman A. Sanford

The threat of terrorism and the need for homeland security calls for advanced technologies to detect the concealed explosives safely and efficiently. We...

Combustion Properties of Halogenated Fire Suppressants

August 1, 2012

Author(s)

Gregory T. Linteris, Valeri I. Babushok, Oliver Meier

Previous experimental studies have shown that some halogenated fire suppressant agents added to hydrocarbon-air systems can enhance the combustion. For example...

Measurement and validation of cell-based assays with microfluidics at the National Institute of Standards and Technology (NIST)

August 1, 2012

Author(s)

Gregory A. Cooksey, Francisco J. Atencia, Samuel P. Forry

Laser power meter comparison at far infrared wavelengths and terahertz frequencies

August 1, 2012

Author(s)

John H. Lehman, Marla L. Dowell, Nina P. Basta, Kerry N. Betz, Erich N. Grossman

We have evaluated the responsivity of seven different detectors compared to an electrically calibrated photo-acoustic detector at 119 υm (2.5 THz) and 394 υm (0...

Using Viscosity Modifiers to Reduce Effective Diffusivity in Mortars

August 1, 2012

Author(s)

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

Three viscosity modifiers (a commercial shrinkage-reducing admixture, a polypropylene glycol, and cellulose ether) are used to reduce the effective diffusivity...

Increasing the Service Life of Bridge Decks by Incorporating Phase Change Materials (PCMs) to Reduce Freeze/Thaw Cycles

August 1, 2012

Author(s)

Aaron R. Sakulich, Dale P. Bentz

During a freezing event, pore solution in cementitious bodies expands and creates stresses that can cause damage; therefore, reducing the number of freeze/thaw...

Mid-infrared virtually imaged phased array spectrometer for rapid and broadband trace gas detection

August 1, 2012

Author(s)

Lora L. Nugent-Glandorf, Tyler W. Neely, Florian B. Adler, Adam J. Fleisher, Kevin C. Cossel, Bryce Bjork, Tim P. Dinneen, Chris S. Wood, Jun Ye, Scott A. Diddams

We present and analyze a 2-D imaging spectrometer based on a virtually imaged phased array (VIPA) disperser for rapid, high-resolution molecular detection using...

Legendre Fit to the Reflection Coefficient of a Radiating Rectangular Waveguide Aperture

August 1, 2012

Author(s)

Dylan F. Williams, Mohammad T. Ghasr, Bradley K. Alpert, Zhongxiang Shen, Alexander Arsenovic, Robert M. Weikle, Reza Zoughi

We accurately calculate the reflection coefficient and normalized admittance of radiating open-ended rectangular waveguides and fit our results with a linear...

Precision Alignment of Two mm-Wave Antennas Using An Improved Optical Alignment Tool

August 1, 2012

Author(s)

Joshua A. Gordon, David R. Novotny

In this paper we present an optical imaging tool, the Overlay Imaging Aligner (OIA), developed to aid in the mechanical alignment of antenna components in the...

Comparison of JP-8 and JP-8+100 with the Advanced Distillation Curve Approach

August 1, 2012

Author(s)

Thomas J. Bruno, Kathryn R. Abel, Jennifer Riggs

Additive packages are used with aviation kerosenes to achieve performance enhancements such as higher or lower operating temperatures or increased lubricity. An...

A compact and robust method for full Stokes spectropolarimetry

August 1, 2012

Author(s)

William Sparks, Thomas Germer, John MacKenty, Frans Snik

We present an approach to spectropolarimetry which requires neither moving parts nor time dependent modulation, and which o ers the prospect of achieving high...

Microscopic Insights into Ion Gel Dynamics using Neutron Spectroscopy

August 1, 2012

Author(s)

Maiko Kofu, Takenori Someya, Soichi Tatsumi, Kazuhide Ueno, Takeshi Ueki, Masayoshi Watanabe, Takuro Matsunaga, Mitsuhiro Shibayama, Victoria Garcia Sakai, Madhu Sudan Tyagi, Osamu Yamamuro

We have investigated the microscopic dynamics of ion gels consisting of a PMMA [poly(methyl methacrylate)] network and EMITSFI [1-ethyl-3-methylimidazolium bis...

Application of Internal Curing for Mixtures Containing High Volumes of Fly Ash

August 1, 2012

Author(s)

Igor de la Varga, Javier Castro, Dale P. Bentz, Jason Weiss

Sustainability has become an important issue in the concrete industry in recent years. One way to make concrete more sustainable is through the replacement of...

Efficient Methods for Interoperability Testing Using Event Sequences

July 31, 2012

Author(s)

David R. Kuhn, James M. Higdon, J .M. Lawrence, Raghu N. Kacker, Yu Lei

Many software testing problems involve sequences of events. The methods described in this paper were motivated by testing needs of mission critical systems that...

Protein Structure and Interactions in the Solid State Studied by Small-Angle Neutron Scattering

July 31, 2012

Author(s)

Joseph E. Curtis, Arnold McAuley, Hirsh Nanda, Susan Krueger

SANS is uniquely qualified to study the structure of proteins in liquid and solid phases that are relevant to food scienc3 and biotechnological applications. We...

An Introduction for Machining Researchers to Measurement Uncertainty Sources in Thermal Images of Metal Cutting

July 31, 2012

Author(s)

Eric P. Whitenton

Thermal imaging yields valuable information which improves our understanding of the metal cutting process. This understanding may be used to improve and verify...

Synthetic spike-in standards improve run-specific systematic error analysis for DNA and RNA sequencing

July 31, 2012

Author(s)

Justin M. Zook, Daniel V. Samarov, Jennifer H. McDaniel, Shurjo Sen, Marc L. Salit

While the importance of random sequencing errors decreases at higher DNA or RNA sequencing depths, systematic sequencing errors (SSEs) dominate at high...

Topography Measurements and Performance Comparisons between NIST SRM 2460 Standard Bullet Masters and BKA Bullet Replicas

July 31, 2012

Author(s)

Jun-Feng Song, Theodore V. Vorburger, Robert M. Thompson, Susan M. Ballou, Xiaoyu Alan Zheng, Thomas Brian Renegar, Richard M. Silver

Two Standard Reference Material (SRM) 2460 Bullets produced by the National Institute of Standards and Technology (NIST) were used as masters for the...

Information Retrieval on the Blogosphere

July 30, 2012

Author(s)

Ian M. Soboroff, Rodrygo Santos, Craig Macdonald, Richard McCreadie, Iadh Ounis

Blogs have recently emerged as a new open, rapidly evolving and reac- tive publishing medium on the Web. Rather than managed by a central entity, the content on...

Wide Cantilever Stiffness Range Cavity Optomechanical Sensors for Atomic Force Microscopy

July 30, 2012

Author(s)

Yuxiang Liu, Houxun H. Miao, Vladimir A. Aksyuk, Kartik A. Srinivasan

We report on progress in developing compact sensors for atomic force microscopy (AFM), in which the mechanical transducer is integrated with near-field optical...

EDS measurements of x-ray intensity at WDS precision and accuracy using a silicon drift detector

July 30, 2012

Author(s)

Nicholas Ritchie, Dale E. Newbury, Jeffrey M. Davis

The accuracy and precision of x-ray intensity measurements with an silicon drift detector (SDD) are compared with the same measurements performed on a...

A Simplified Wind Flow Model for the Estimation of Aerodynamic Effects on Small Structures

July 30, 2012

Author(s)

DongHun Yeo, Arindam G. Chowdhury

The reliable measurement of pressures on low-rise buildings in the atmospheric boundary layer (ABL) flow remains a challenge, as has been shown by the large...

Quantitative Methods to Characterize Cell Lines: Comparison of Cells from Marine and Terrestrial Mammals.

July 28, 2012

Author(s)

Tighe Spurlin, John T. Elliott, Michael W. Halter, Kiran Bhadriraju, Alessandro Tona, Anne L. Plant, Annalaura Mancia, Bobby L. Middlebrooks, Gregory W. Warr

Descriptive terms are often used to characterize cells in culture, but the use of nonquantitative and poorly defined terms can lead to ambiguities when...

Was this page helpful?