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Journals

Characterization of Surface Accumulation and Release of Nanosilica During Irradiation of Polymer Nanocomposites with Ultraviolet Light

August 12, 2012

Author(s)

Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Savelas A. Rabb, Paul E. Stutzman, Justin M. Gorham, Xiaohong Gu, Lee L. Yu, Joannie W. Chin

Nanofillers are increasingly used for enhancing multiple properties of polymeric materials in many applications. However, polymers are susceptible to...

Early-time Behavior in Reverberation Chambers and Its Effect on the Relationships Between Coherence Bandwidth, Chamber Decay Time, RMS Delay Spread, and the Chamber Build-up Time

August 12, 2012

Author(s)

Christopher L. Holloway, Haider Shah, Ryan J. Pirkl, Catherine A. Remley, David A. Hill, John M. Ladbury

The use of reverberation chambers for electromagnetic testing is widely being accepted for use in many measurement applications. In recent years reverberation...

Structural Analysis of Impact Damage to World Trade Center Buildings 1, 2, and 7

August 12, 2012

Author(s)

Therese P. McAllister, Fahim Sadek, John L. Gross, Steven W. Kirkpatrick, Robert S. MacNeill, R. Bocchieri, Mehdi S. Zarghamee, Omer O. Erbay, Andrew T. Sarawit

The National Institute of Standards and Technology (NIST) conducted an extensive investigation of the collapse of World Trade Center towers (WTC 1 and WTC 2)...

Effects of chlorine and other water quality parameters on the release of silver nanoparticles from a ceramic surface

August 11, 2012

Author(s)

Michael W. Stewart, Angela Bielefeldt, Elisabeth Mansfield, R. Scott Summers, Joseph N. Ryan

A quartz crystal microbalance was used to determine the effects of different water quality parameters on the desorption of silver nanoparticles from surfaces...

Wireless Technologies in Healthcare: Selected Papers from IEEE PIMRC 2011

August 10, 2012

Author(s)

Kamran Sayrafian, Kamya Yekeh Yazdandoost

The use of wireless technologies for medical device communication, health monitoring (at hospitals or homes) and mobile healthcare information delivery (i.e. m...

Noble gas viscosities at 25 degrees C

August 10, 2012

Author(s)

Robert F. Berg, William C. Burton

Near 25 C, ab initio calculations of the zero-density viscosity of helium gas eta_He have an uncertainty of approximately 0.001 %, which is 1/40th of the...

Optical Trapping in Air of an Individual Nanotube-Sphere Device

August 10, 2012

Author(s)

Andrew J. Slifka, Gurpreet Singh, Paul Rice, Damian S. Lauria, Roop Mahajan

We demonstrate the optical manipulation of a polystyrene bead in air attached to an individual carbon nanotube. In continuation of our previous work [1] we have...

A near-field scanning microwave microscope for characterization of inhomogeneous photovoltaics

August 10, 2012

Author(s)

Joel C. Weber, Kristine A. Bertness, John B. Schlager, Norman A. Sanford, Atif A. Imtiaz, Thomas M. Wallis, Pavel Kabos, Kevin J. Coakley, Victor Bright, Lorelle M. Mansfield

We present a near field scanning microwave microscope (NSMM) optimized for imaging photovoltaic samples. Our system incorporates a cut Pt-Ir tip inserted into...

Are intelligent agents the key to optimizing building HVAC system performance?

August 10, 2012

Author(s)

George E. Kelly, Steven T. Bushby

This paper describes the development and implementation of a simulation testbed used to study the concept of employing intelligent agents to optimize the...

Simultaneous Estimation and Reduction of Nonconformity in Interlaboratory Studies

August 8, 2012

Author(s)

Andrew L. Rukhin, William E. Strawderman

Several procedures designed to reduce nonconformity in interlaboratory studies by shrinking data toward a consensus weighted mean are suggested. Some of them...

Unwanted Combustion Enhancement by C6F12O Fire Suppressant

August 7, 2012

Author(s)

Gregory T. Linteris, Valeri I. Babushok, Peter B. Sunderland, Fumiaki Takahashi, Viswanath R. Katta, Oliver Meier

Several agents are under consideration to replace CF3Br for use in suppressing fires in aircraft cargo bays. In a Federal Aviation Administration (FAA)...

Current-induced synchronized switching of magnetization

August 7, 2012

Author(s)

Kyung Jin Lee, Soo-Man Seo

We propose a multilayer structure that allows a reduced switching current with maintaining high thermal stability of the magnetization. It consists of a...

Estimating Heterogeneity Variance in Meta-Analysis

August 6, 2012

Author(s)

Andrew L. Rukhin

Several new estimators of the between-study variability in a heterogeneous random effects meta-analysis model are derived. One of them can be interpreted as the...

Nanomechanical mapping of the osteochondral interface with contact resonance force microscopy and nanoindentation

August 6, 2012

Author(s)

Sara E. Campbell, Virginia L. Ferguson, Donna C. Hurley

The bone-cartilage, or osteochondral, interface resists remarkably high shear stresses and rarely fails, yet its mechanical characteristics are largely unknown...

Coupled-cavity ring-down spectroscopy technique

August 6, 2012

Author(s)

Jeremie B. Courtois, Joseph T. Hodges

We present a technique called coupled-cavity ring-down spectroscopy (CC-RDS) for controlling the finesse of an optical resonator. Applications include extending...

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...

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...

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...

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...

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