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Displaying 26001 - 26025 of 73969

PERFORMANCE ASSESSMENTS INSIGHTS ON THE USE OF CEMENTS IN WASTE MANAGEMENT

November 7, 2010
Author(s)
David W. Esh, Jacob Philip, Kenneth A. Snyder
The use of cementitious materials has been proposed in a variety of waste management systems because these materials can have a variety of desirable performance characteristics: hydraulic isolation, chemical isolation, structural stability. Cementitious

Ultra Low Dark-count-rate Up-conversion Single Photon Detector

November 7, 2010
Author(s)
Xiao Tang, Lijun Ma, Oliver T. Slattery
We have demonstrated an ultra low noise up-conversion single photon detector using a periodically poled lithium niobate waveguide. The dark count rate of this detector is lower than 100 counts/second with 10% detection efficiency.

2010 Programs of the Manufacturing Engineering Laboratory

November 5, 2010
Author(s)
Lisa J. Fronczek, Bessmarie A. Young
The National Institute of Standards and Technology s Manufacturing Engineering Laboratory (MEL) promotes innovation and the competitiveness of U.S. manufacturing through measurement science, measurement services, and critical technical contributions to

Alarm Information for Decision Support

November 4, 2010
Author(s)
William D. Davis, Adam M. Barowy, Stephen Kerber
Experiments conducted in a Toledo Ohio school are used to examine the use of signals from simulated heat detectors by incident command. Two approaches are examined. The first is to use the signal from ceiling mounted thermocouples to deduce conditions in

Randomized Benchmarking of Atomic Qubits in an Optical Lattice

November 4, 2010
Author(s)
Steven M. Olmschenk, Radu S. Chicireanu, Karl D. Nelson, James V. Porto
We perform randomized benchmarking on neutral atomic quantum bits (qubits) confined in an optical lattice. Single qubit gates are implemented using microwaves, resulting in a measured error per randomized computational gate of 1.4(1) x 10−4 that is

MEMS Microhotplate Temperature Sensor BIST: Importance and Applications

November 3, 2010
Author(s)
Muhammad Y. Afridi, Jon C. Geist
This paper describe the importance of temperature sensor built-in self test (BIST) for microhotplate based sensors. It shows possible ways to implement BIST functionality for microhotplate temperature sensor, including Resistance Temperature Detectors (RTD

An Integrated PHY and MAC Layer Model for Half-Duplex IEEE 802.11 Networks

November 2, 2010
Author(s)
David W. Griffith, Michael R. Souryal, Camillo A. Gentile, Nada T. Golmie
This paper introduces an IEEE 802.11 analytical model that examines uplink and downlink communications between non-saturated stations and a non-saturated access point. The model integrates channel effects and collisions into a single expression for the

Calibrated nanoscale capacitance measurements using a scanning microwave microscope

November 2, 2010
Author(s)
H P. Hubner, M. Moertelmaier, Pavel Kabos, M. Fenner, C Rankl, Atif A. Imtiaz
A scanning microwave microscope (SMM) for spatially resolved capacitance measurements in the attofarad-to-femtofarad regime is presented. The system is based on the combination of an atomic force microscope (AFM) and a performance network analyzer (PNA

High precision, broadband optical measurements with fiber laser frequency combs

November 2, 2010
Author(s)
Nathan R. Newbury, Ian R. Coddington, Esther Baumann, Fabrizio R. Giorgetta, William C. Swann, Alexander M. Zolot
Optical frequency combs have been used extensively, and with remarkable success, to measure the absolute frequency of cw lasers. The use of frequency combs has also expanded to include applications such as precision ranging, component metrology, and

Instabilities as a Measurement Tool for Soft Materials

November 2, 2010
Author(s)
John A. Howarter, Christopher Stafford
Mechanical instabilities such as wrinkles, creases, and folds have long been viewed as a source of frustration for engineers and often a point of curiosity among scientists. Scientists aspire to understand the underlying physics behind the formation of

Nuclear Magnetic Resonance Gyroscopes

November 2, 2010
Author(s)
Elizabeth A. Donley
Nuclear magnetic resonance gyroscopes(NMRGs)detect rotation as shift in the Larmor precession frequency of nuclear spins. A review of the open literature on NMRGs is presented, which includes an introduction to the spectroscopic techniques that enable

Thickness dependence of the elastic modulus of tri (8-hydroxyquinolinato) aluminum (III)

November 2, 2010
Author(s)
Jessica M. Torres, Nathan Bakken, Christopher Stafford, Jian Li, Bryan D. Vogt
The intrinsic flexibility of organic molecules has been suggested to enable bendable electronics in comparison to their stiffer, inorganic counterparts. However, very little is known regarding the mechanical properties of these conjugated molecular glasses

A Review of Building Evacuation Models, 2nd Edition

November 1, 2010
Author(s)
Erica D. Kuligowski, Richard D. Peacock, Bryan L. Hoskins
Evacuation calculations are increasingly becoming a part of performance-based analyses to assess the level of life safety provided in buildings. In some cases, engineers are using back-of-the-envelope (hand) calculations to assess life safety, and in

An Application of Combinatorial Methods to Conformance Testing for Document Object Model Events

November 1, 2010
Author(s)
Carmelo Montanez-Rivera, D. Richard Kuhn, Mary C. Brady, Richard M. Rivello, Jenise Reyes Rodriguez, Michael K. Powers
This report describes the use of combinatorial test methods to reduce the cost of testing for the Document Object Model Events standard while maintaining an equivalent level of assurance. More than 36,000 tests - all possible combinations of equivalence
Displaying 26001 - 26025 of 73969
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