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NIST Authors in Bold

Displaying 32051 - 32075 of 73697

Classical Radionuclidic Calorimetry

August 2, 2007
Author(s)
Ronald Colle
This brief survey summarizes the principles and practice of classical isothermal microcalorimetry for the primary standardization of the activity of radionuclides. Its advantages and some potential problems are highlighted through the discussion of several

Interactions of Dispersive Shock Waves

August 2, 2007
Author(s)
Mark Hoefer, Mark J. Ablowitz
Interactions and collisions of dispersive shock waves in defocusing (repulsive) nonlinear Schrodinger-type systems are investigated analytically and numerically. Two canonical cases are considered. In one case, two counter-propagating dispersive shock

Characterization of degradation mechanisms in neural recording electrodes

August 1, 2007
Author(s)
Jennifer Anton, Stephanie A. Hooker
Understanding the nature of specific neural activity is essential to the progression of research in the field of brain disorders and diseases, as well as neuroprosthetics. Microelectrodes are the primary measurement devices used to transduce neural

Correction of Location and Orientation Errors in Electromagnetic Motion Tracking

August 1, 2007
Author(s)
John G. Hagedorn, Steven G. Satterfield, John T. Kelso, W. Austin, Judith E. Terrill, Adele Peskin
We describe a method for calibrating an electromagnetic motion tracking device. Algorithms for correcting both location and orientation are presented. In particular, we use a method for interpolating rotation corrections at scattered data points that has

Demonstration of Real-Time Tactical Decision Aid Displays

August 1, 2007
Author(s)
William D. Davis, David G. Holmberg, Paul A. Reneke, L D. Brassell, R Vettori
On September 22, 2005 the National Institute of Standards and Technology (NIST) conducted a demonstration of two prototype tactical decision aid computer interfaces in the city of Wilson, North Carolina. Members of the City of Wilson Fire Department

Distributed Simulation - A Necessity or Ivory Tower Research?

August 1, 2007
Author(s)
Charles R. McLean
There is a growing need for the nation to be better prepared to deal with both man-made and natural disasters. The responses to the attacks on the World Trade Center and Hurricane Katrina are strong evidence of this need. Effective emergency response

Environmentally Acceptale Fire Extinguishants

August 1, 2007
Author(s)
J D. Mather, R E. Tapscott
Aircraft fire suppression applications inherently demanding performance requirements, made all the more challenging by low temperature conditions, physical inaccessibility, and high and possibly uncertain air flow conditions, have been historically

General Buildings Information Handover Guide

August 1, 2007
Author(s)
Kristine K. Fallon, Mark E. Palmer
The 2004 Construction Users Roundtable (CURT) report, Collaboration, Integrated Information, and the Project Life Cycle in Building Design, Construction and Operation (WP-1202), makes clear that there is a compelling need to improve project delivery

High Accuracy Dual Lens Transmittance Measurements

August 1, 2007
Author(s)
J Cheung, James Gardner, Alan L. Migdall, Sergey Polyakov, Michael Ware
We show how to determine the transmittance of short focal length lenses (f 19 mm, in this case) with an uncertainty of 1 part in 103 or better by measuring transmittances of lens pairs of a set of three or more lenses with the same nominal focal length

Key nonlinear measurement events

August 1, 2007
Author(s)
Catherine A. Remley, Dominique Schreurs
In this article, we describe two engineer-friendly events - the Automatic RF Techniques Group (ARFTG) Nonlinear Measurements Workshop and the Nonlinear Vector Network Analyzer (NVNA) Users' Forum - designed to let participants learn about and discuss

Microwave Power Absorption in Low-Reflectance, Complex, Lossy Transmission Lines

August 1, 2007
Author(s)
Jon Geist, Jayna J. Shah, Mulpuri Rao, Michael Gaitan
Simple sets of equations have been derived to describe the absorption of microwave power in threeregion, lossy transmission lines in terms of S-parameter reflection and transmission amplitudes. Each region was assumed to be homogeneous with discontinuities

Reference Viscosities of H 2 , CH 4 , Ar and Xe at Low Densities

August 1, 2007
Author(s)
E May, Robert F. Berg, Michael R. Moldover
We determined the zero-density viscosity eta of hydrogen, methane and argon in the temperature range 200 K to 400 K, with standard uncertainties of 0.084 % for hydrogen and argon and 0.096 % for methane. These uncertainties are dominated by the uncertainty

State-of-the-Art Review for Commissioning Low Energy Buildings: Existing Cost/Benefit and Persistence Methodologies and Data, State of Development of Automated Tools and Assessment of Needs for Commissioning ZEB

August 1, 2007
Author(s)
Marti Frank, Hannah Friedman, Kristin Heinemeier, Cory Toole, David Claridge, Natascha S. Milesi-Ferretti, Philip Haves
This report documents the findings of a review of the state of the art in the commissioning of low energy buildings. The purpose of this report is threefold: 1) To identify and assess existing methodologies for defining the costs and benefits of

Surface Grafting of Polypyrrole onto Silicon Wafers

August 1, 2007
Author(s)
Daeson Sohn, Hyoseung Moon, Michael J. Fasolka, Naomi Eidelman, Sang-Mo Koo, Curt A. Richter, Eun S. Park, Joseph Kopanski, Eric J. Amis
A micromolding technique in capillaries was adapted to make uniform patterns of polypyrrole (Ppy), and the conductivities of the patterns were measured by direct contact IV curves and conductance AFM methods. Noncovalently bound Ppy patterns have high
Displaying 32051 - 32075 of 73697
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