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Search Publications

NIST Authors in Bold

Displaying 26851 - 26875 of 73697

A Second-Generation NIST Gravimetric Hygrometer

April 1, 2010
Author(s)
Christopher W. Meyer, Joseph T. Hodges, Gregory E. Scace, James R. Whetstone, R W. Hyland
A second-generation primary hygrometer has been completed at the National Institute of Standards and Technology (NIST). A gravimetric hygrometer measures humidity by separating the water from the carrier gas using desiccants and afterwards independently

A Simple Method to Assess the Thermal Mechanisms Associated with a Fire Suppressant

April 1, 2010
Author(s)
Cary Presser, C Avedisian, J. Stiehl, Richard E. Cavicchi
A new screening concept is presented to evaluate the thermal effectiveness of fire suppressants (liquids and gases) for solid surface cooling (without vaporization for liquid suppressants) under well-controlled conditions. The concept is based on measuring

Adhesion research at the National Institute of Standards and Technology (NIST)

April 1, 2010
Author(s)
Christopher M. Stafford, Adam J. Nolte, Gale A. Holmes, Sheng Lin-Gibson, John A. Howarter
NIST s involvement in adhesion research has been wide ranging and is ultimately in response to interactions between individual project leaders and our industrial partners. In this way, NIST s participation in the Adhesion Society has been instrumental in

Confidence Regions for Parameters of Linear Models

April 1, 2010
Author(s)
Andrew L. Rukhin
A method is suggested for constructing a conservative confidence region for the parameters of a general linear model. In meta-analytical applications, when the results of independent but heterogeneous studies are to be combined, this region can be employed

E-mail Security: an Overview of Threats and Safeguards

April 1, 2010
Author(s)
Kevin M. Stine, Matthew A. Scholl
This publication discusses, at a high level, the ubiquitous threats facing email systems today and impresses the need to secure these systems. This article will provide high level tips and techniques for securing email systems and point to resources that

Epitaxial Graphenes on Silicon Carbide

April 1, 2010
Author(s)
Joseph A. Stroscio, Walt A. de Heer, Phillip First, Claire Berger, Thomas Seyller, Jeong-Sun Moon
The materials science of graphene grown epitaxially on the hexagonal basal planes of SiC crystals is reviewed. We show that the growth of epitaxial graphene on Si-terminated SiC is much different than growth on the C-terminated SiC surface, and discuss the

Excimer laser-based purification of single-walled carbon nanotubes

April 1, 2010
Author(s)
Katie Hurst, Elisabeth Mansfield, Anne Dillon, John H. Lehman
Bulk purified carbon nanotube (CNT) material is essential for the realization of CNT applications including incorporating them into various composite materials. We have developed a laser-based purification technique for bulk single-walled carbon nanotubes

Fabrication of Optics by Diamond Turning, Chapter 41, Handbook of Optics

April 1, 2010
Author(s)
Richard L. Rhorer, Christopher J. Evans
This is an update of a chapter in a published book: Chapter 41: Fabrication of Optics by Diamond Turning, Handbook of Optics: Fundamentals, Techniques, and Design, 2nd Ed., Vol. I, McGraw-Hill, Inc., NY, 1995, Sponsored by the Optical Society of America

From the Editor's Desk: Where to Go

April 1, 2010
Author(s)
Catherine A. Remley
This is an Editorial for the April, 2010 issue of IEEE Microwave Magazine. Kate Remley, the Editor-in-Chief, writes about timely topics for the members of the Microwave Theory and Techniques Society (MTT-S).

High-Frequency Dielectric Measurements: A Tutorial

April 1, 2010
Author(s)
James R. Baker-Jarvis, Michael D. Janezic, Donald C. DeGroot
KNOWLEDGE of the response of materials to electromagnetic (EM) fields in the frequency range of radio frequency (RF) through terahertz (THz) is critical to numerous research projects and electronic product development activities. Electromagnetic waves in

Improving carbon nanotube transparent conductor performance by UV laser irradiation

April 1, 2010
Author(s)
Katie Hurst, Jeffrey Blackburn, Larsen A. Brian, John H. Lehman
We discuss the photochemical treatment of transparent conducting (TC) films made from single-walled carbon nanotubes (SWCNTs).(1) The treatment process is comparable to that described previously, whereby unwanted amorphous carbon is removed from bulk

Influence of Ti and Ta doping on the irreversible strain limit of ternary Nb 3 Sn superconducting wires made by the restacked-rod process

April 1, 2010
Author(s)
Najib Cheggour, Loren F. Goodrich, Theodore C. Stauffer, Jolene D. Splett, Xifeng Lu, A. K. Ghosh, G. Ambrosio
Nb 3Sn superconducting wires made with restacked-rod process (RRP®) were found to have a dramatically improved resilience to axial tensile strain when alloyed with Ti as compared to Ta. Whereas Ta-alloyed Nb 3Sn in RRP wires showed permanent damage to its

Interference of Single Photons from Two Separate Semiconductor Quantum Dots

April 1, 2010
Author(s)
Edward B. Flagg, Andreas Muller, Sergey V. Polyakov, Alexander E. Ling, Glenn S. Solomon
We demonstrate and characterize interference between discrete photons emitted by two separate semiconductor quantum dot states in different samples excited by a pulsed laser. Their energies are tuned into resonance using strain. The photons have a total

Internal quantum efficiency modeling of silicon photodiodes

April 1, 2010
Author(s)
Thomas R. Gentile, Steven W. Brown, Keith R. Lykke, Ping-Shine Shaw, John T. Woodward IV
Results are presented for modeling of the internal quantum efficiency (IQE) of silicon photodiodes in the 400 nm to 900 nm wavelength range. The IQE data are based on measurements of the external quantum efficiencies of three transmission trap detectors

Life history as a source of variation for persistent organic pollutant (POP) patterns in a bottlenose dolphin community resident to Sarasota Bay, FL

April 1, 2010
Author(s)
Jennifer Yordy, John R. Kucklick, Randall S. Wells, Brian C. Balmer, Lori Schwacke, Teresa Rowles
Bottlenose dolphins (Tursiops truncatus) are prone to accumulating complex mixtures of persistent organic pollutants (POPs). While variations in POP patterns have been previously observed for populations separated across regional and fine-scale geographic

Multiwalled carbon nanotubes coated with silicon carbonitride (SiCN)

April 1, 2010
Author(s)
Katie Hurst, Christopher L. Cromer, Elisabeth Mansfield, Roop Mahajan, John H. Lehman, Gurpreet Singh
We describe the development of two next-generation optical coatings; amorphous polymer-derived silicon carbonitride (SiCN) particles and a composite consisting of SiCN surrounding a multiwalled carbon nanotube (MWCNT) core. Laser-induced damage testing of

Niobium-silicide junction technology for superconducting digital electronics

April 1, 2010
Author(s)
David I. Olaya, Paul D. Dresselhaus, Samuel P. Benz
We present a technology based on Nb/NbxSi1-x/Nb junctions, with barriers near the metal-insulator transition, for applications in superconducting electronics (SCE) as an alternative to Nb/AlOx/Nb tunnel junctions. Josephson junctions with co-sputtered

NIST Gas Hydrate Research Database and Web Dissemination Channel

April 1, 2010
Author(s)
Kenneth G. Kroenlein, Vladimir Diky, Robert D. Chirico, Andrei F. Kazakov, Chris D. Muzny, Michael D. Frenkel
To facilitate advances in application of technologies pertaining to gas hydrates, a freely available data resource containing experimentally-derived information about those materials was developed. This work was performed by the Thermodynamic Research

Novel Dimethacrylates with Quaternary Ammonium Functionalities for Reduced Bacteria Adhesion

April 1, 2010
Author(s)
Nancy Lin, Joseph M. Antonucci, Diana N. Zeiger, Kathy Tang, Bruce O. Fowler, Sheng Lin-Gibson
Biofilm growth and secondary caries have resulted in the failure of many dental composite restorations. One approach to address this issue is the modification of dental materials to reduce bacterial adhesion and biofilm growth. Quaternary ammonium salts

On Hash Functions Using Checksums

April 1, 2010
Author(s)
Praveen Gauruvarum, John M. Kelsey, L. Knudsen, S. Thomsen
We analyse the security of iterated hash functions that compute an input dependent checksum which is processed as part of the hash computation. We show that a large class of such schemes, including those using non-linear or even one- way checksum functions
Displaying 26851 - 26875 of 73697
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