U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 31426 - 31450 of 74178

Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock

August 6, 2007
Author(s)
Qiang Zhang, Xiuping Xie, Hiroki Takesue, Sae Woo Nam, Carsten Langrock, M. M. Fejer, Yoshihisa Yamamoto
We report 10-ps correlated photon pair generation in periodically-poled reverse-proton-exchange lithium niobate waveguides with integrated mode demultiplexer at a wavelength of 1.5-υm and a clock of 10 GHz. Using superconducting single photon detectors, we

Coupling Nanowire Chemiresistors With Microhotplate Platforms for Advanced Gas Sensing

August 6, 2007
Author(s)
Douglas C. Meier, Stephen Semancik, Bradley Button, Eugene Strelcov, Andrei Kilmakov
Recent advances in nanotechnology have yielded new materials and structures that offer great potential for improving sensitivity, selectivity and stability of the next generation of chemical gas sensors. To successfully fabricate practical devices, the

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
Displaying 31426 - 31450 of 74178