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Displaying 30751 - 30775 of 74893

Automated Combinatorial Test Methods: Beyond Pairwise Testing

June 2, 2008
Author(s)
David R. Kuhn, Raghu N. Kacker, Yu Lei
Pairwise testing has become a popular approach to software quality assurance because it often provides effective error detection at low cost. However, pairwise (2-way) coverage is not sufficient for assurance of mission-critical software. Combinatorial

Electromagnetic Airframe Penetration Measurements for the FAA Bombardier Global 5000

June 2, 2008
Author(s)
Chriss A. Grosvenor, David R. Novotny, Dennis G. Camell, Galen H. Koepke, Robert Johnk
The National Institute of Standards and Technology has recently completed shielding effectiveness/penetration studies on three different aircraft types for the Federal Aviation Administration. The studies are used to understand the cavity coupling

Fabry-Perot temperature dependence and surface-mounted optical cavities

June 2, 2008
Author(s)
Richard W. Fox
Factors that contribute to the resonance temperature dependence of low-expansion optical cavities are discussed, including deformation at the cavity ends due to different coefficients of thermal expansion (CTE) of the spacer, optically-contacted mirror

High-Voltage Isolated Gate Drive Circuit for 10 kV, 100 A SiC MOSFET/JBS Power Modules

June 2, 2008
Author(s)
David W. Berning, Tam H. Duong, Jose M. Ortiz, Angel Rivera, Allen R. Hefner Jr.
A high-current, high-voltage-isolated gate drive circuit developed for characterization of high-voltage, high-frequency 10 kV, 100 A SiC MOSFET/JBS half-bridge power modules is presented and described. Gate driver characterization and simulation have shown

Multiscale Green's function for deflection of graphene lattice

June 2, 2008
Author(s)
B. Yang, Vinod Tewary
Fundamental deflection behavior of an infinite two-dimensional graphene lattice subjected to a transverse point force has been analyzed using lattice statics and the continuum Green's functions. An analytic expression has been derived for the lattice

Prototype Cantilevers for AFM Lateral Force Measurement

June 2, 2008
Author(s)
Richard S. Gates, Mark Reitsma
One of the major difficulties in calibrating the lateral forces measured with optical lever Atomic Force Microscopy is in determining the lateral optical lever sensitivity. Novel cantilevers have been designed and fabricated to simplify this measurement

Radio Communications for Emergency Responders in High-Multipath Outdoor Environments

June 2, 2008
Author(s)
Catherine A. Remley, Galen H. Koepke, Christopher L. Holloway, Chriss A. Grosvenor, Dennis G. Camell
We present measurement data to support technology and standards development for broadband, digitally modulated radio communications used by emergency responders. Measurements were carried out at an oil refinery, representing a class of high-multipath

Reducing Thermal Noise in Molecular Force Spectroscopy

June 2, 2008
Author(s)
Gordon A. Shaw
Molecular force spectroscopy is the practice of testing the mechanical properties of single molecules. The precision determination of these properties requires an instrument capable of piconewton-level force measurement. The atomic force microscope (AFM)

Stable Insulating Tethered Bilayer Lipid Membranes

June 2, 2008
Author(s)
Inga K. Vockenroth, Christian Ohm, Joseph W. Robertson, Duncan J. McGillivray, Mahias Losche, Ingo Koper
Tethered bilayer lipid membranes have been shown to be an excellent model system for biological membranes. Coupling of a membrane to a solid supports creates a stable system that is accessible for various surface analytical tools. Good electrical sealing

A Next Generation Sampling Comparator Probe For The NIST Sampling Waveform Analyzer

June 1, 2008
Author(s)
Owen B. Laug, David I. Bergman, T. M. Souders, Bryan C. Waltrip
The design and performance of A Next Generation Sampling Comparator Probe (NGSCP) is described. It is intended as one of a group of probes designed for use with the NIST Sampling Waveform Analyzer (SWA). The probe design is centered on an application

A TWO-WAY JOSEPHSON VOLTAGE STANDARD COMPARISON BETWEEN NIST AND NRC

June 1, 2008
Author(s)
Yi-hua D. Tang, Barry Wood, Clark Hamilton
A two-way Josephson voltage standard (JVS) direct comparison between the National Institute of Standards and Technology (NIST) and the National Research Council (NRC) has been conducted. The process consists of two comparisons, one using NIST designed

An Efficient Algorithm for Solving the Phase Field Crystal Model

June 1, 2008
Author(s)
Mowei Cheng, James A. Warren
We present and discuss the development an unconditionally stable algorithm to solving the evolution equations for the Phase Field Crystal (PFC) model. This algorithm allows for an arbitrarily large algorithmic time step. As the basis for our analysis of

AUTOMATION OF 1 TOhm TO 100 TOhm ULTRA-HIGH RESISTANCE MEASUREMENTS AT NIST

June 1, 2008
Author(s)
Dean G. Jarrett, Angelica M. Muniz-Mercado, Marlin E. Kraft
The automation of ultra-high resistance measurements at the National Institute of Standards and Technology (NIST) in the range 1 TOhm to 100 TOhm has been completed with the use of a programmable XY positioning system to facilitate the guarded connection

Catalytic Inhibition of Laminar Flames by Transition Metal Compounds

June 1, 2008
Author(s)
Gregory T. Linteris, M D. Rumminger, Valeri I. Babushok
Some of the most effective flame inhibitors ever found are metallic compounds. Their effectiveness, however, drops off rapidly with an increase of agent concentration, and varies widely with flame type. Iron pentacarbonyl, for example, can be up to two

Catalytic Inhibition of Laminar Flames by Transition Metal Compounds.

June 1, 2008
Author(s)
Gregory T. Linteris, Valeri I. Babushok, M D. Rumminger
Some of the most effective flame inhibitors ever found are metallic compounds. Their effectiveness, however, drops off rapidly with an increase of agent concentration, and varies widely with flame type. Iron pentacarbonyl, for example, can be up to two
Displaying 30751 - 30775 of 74893