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Search Publications

NIST Authors in Bold

Displaying 29226 - 29250 of 73697

Standards Development for Gas Phase Air Cleaning Equipment in Buildings

November 3, 2008
Author(s)
Andrew K. Persily, Cynthia H. Reed, Stephanie S. Watson, Nicos Martys, Edward J. Garboczi, Heather Davis
Concerns about building security have resulted in increasing interest in gas phase air cleaning (GPAC) and the need for standard methods to determine the effectiveness of these systems. Similarly, the ability to predict their installed performance, based

Probability Density Function of Power Received in a Reverberation Chamber

November 2, 2008
Author(s)
David A. Hill
The probability density function (PDF) for the power received by an arbitrary antenna in a reverberation chamber has been shown to be exponential. The purpose of this correspondence is to provide a direct maximum-entropy derivation of the PDF that deals

A Comparison of Viscosity-Concentration Relationships for Emulsions

November 1, 2008
Author(s)
Jeffrey W. Bullard, A T. Pauli, Edward J. Garboczi, Nicos Martys
Differential Effective Medium Theory (D-EMT) is applied to derive expressions for the viscosity of a colloidal suspension or an emulsion as a function of the volume fraction of the dispersed phase. The application of D-EMT to this problem depends on how

A robust algorithm for eye-diagram analysis

November 1, 2008
Author(s)
Jeffrey A. Jargon, Paul D. Hale, Chih-Ming Wang
We present a new method for analyzing eye diagrams that always provides a unique solution by making use of a robust, least-median-of-squares (LMS) location estimator. In contrast to commonly used histogram techniques, the LMS procedure is insensitive to

Meaningful Performance Evalution Conditions for Fire Service Thermal Imaging Cameras

November 1, 2008
Author(s)
Francine K. Amon, Anthony P. Hamins, Nelson P. Bryner, Justin Rowe
Thermal imaging cameras (TIC) are rapidly becoming integral equipment for the fire service for use in structure fires and other emergencies. The Building and Fire Research Laboratory (BFRL) at the National Institute of Standards and Technology has

MESFETs made from individual GaN nanowires

November 1, 2008
Author(s)
Paul T. Blanchard, Kristine A. Bertness, Todd E. Harvey, Lorelle Mansfield, Aric W. Sanders, Norman A. Sanford
In this paper, we demonstrate novelMESFETs based on individual GaN nanowires. The Pt/Au Schottky gates exhibited excellent two-terminal Schottky diode rectification behavior. The average effective Schottky barrier height was 0.87 eV, with an average

Metrology for the Electrical Characterization of Semiconductor Nanowires

November 1, 2008
Author(s)
Curt A. Richter, Hao Xiong, Xiaoxiao Zhu, Wenyong Wang, Vincent M. Stanford, Woong-Ki Hong, Takhee Lee, D. E. Ioannou, Qiliang Li
Nanoelectronic devices based upon self-assembled semiconductor nanowires are excellent research tools for investigating the behavior of structures with sub-lithographic features as well as a promising basis for future information processing technologies

On the Criteria for Smoldering Ignition in the CFR 1632 Test for Mattresses

November 1, 2008
Author(s)
Thomas J. Ohlemiller
The Sleep Products Safety Council is sponsoring a study at NIST of the viability of a bench-scale version of CFR 1632 (cigarette ignition of mattresses). In the context of this study, NIST was also asked by CPSC to look into the criteria used to decide the

On the Significance of Transient Heat Release Rate Excursions Above a Set Limit

November 1, 2008
Author(s)
Thomas J. Ohlemiller, Richard D. Peacock
When a heat release rate limit for a consumer product is set by a regulatory agency, it is of interest to know whether small excursions above that limit, such as may occur due to production line variability, represent a disproportionate increase in fire

Phase and Valence Transitions in Ba^2^LnSn x Nb 1-x O 6-d

November 1, 2008
Author(s)
Paul J. Saines, Brendan J. Kennedy, Bernt Johannessen, Sarah Poulton
The structures of compounds in the perovskite series Ba2LnSnxNb1−xO6−δ (Ln=Pr and Tb and x=0, 0.1, 0.2, ..., 1.0) have been examined using synchrotron X-ray and neutron diffraction. It was found that niobate members of both series feature full B-site

Reflective optical chopper used in NIST high-power laser measurements

November 1, 2008
Author(s)
Xiaoyu X. Li, Thomas Scott, Christopher L. Cromer, Joshua A. Hadler
For the past ten years, NIST has used high-reflectivity, optical choppers as beamsplitters and attenuators when calibrating the absolute responsivity and response linearity of detectors used with high-power CW lasers. The chopper-based technique has

Thermodynamic properties of tert-butylbenzene and 1,4-di-tert-butylbenzene

November 1, 2008
Author(s)
Robert D. Chirico, William Steele
Heat capacities, enthalpies of phase transitions, and derived thermodynamic properties in the temperature range 5 < (T/K) < 442 were determined with adibatic calorimetry for tert-butylbenzene (TBB) {Chemical Abstracts Service registry number (CASRN) [98-06
Displaying 29226 - 29250 of 73697
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