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Displaying 48801 - 48825 of 143780

Advances in Coherent Population Trapping for Atomic Clocks

August 10, 2010
Author(s)
John E. Kitching, Vishal Shah
We review advances in the field of coherent population trapping (CPT) over the last decade with respect to the application of this physical phenomenon to atomic frequency references. We provide an overview of both the basic phenomenon of coherent

Conductive Carbon Nanotubes for Semiconductor Metrology

August 10, 2010
Author(s)
Joseph J. Kopanski, Victor H. Vartanian, Vladimir Mancevski, Phillip D. Rack, Ilona Sitnitsky, Matthew D. Bresin
This paper presents an evaluation of e-beam assisted deposition and welding of conductive carbon nanotube (c-CNT) tips for electrical scanning probe microscope measurements. Variations in CNT tip conductivity and contact resistance during fabrication were

NIST COORDINATION OF SMART GRID INTEROPERABILITY STANDARDS

August 9, 2010
Author(s)
David A. Wollman, Gerald FitzPatrick, Paul A. Boynton, Thomas L. Nelson
The National Institute of Standards and Technology has efforts underway to accelerate the development of interoperability standards to support the future modernized "Smart Grid" electric grid or energy delivery network characterized by a two-way flow of

Performance Requirements for End-to-End Verifiable Elections

August 9, 2010
Author(s)
Stefan Popoveniuc, John M. Kelsey, Andrew Regenscheid, Poorvi Vora
The term end-to-end verifiability has been used over the past several years to describe multiple voting system proposals. The term has, however, never been formally defined. As a result, its meaning tends to change from voting system to voting system. We

Variability in the Geometric Accuracy of Additively Manufactured Test Parts

August 9, 2010
Author(s)
April L. Cooke, Johannes A. Soons
Results of a study on the variability in the geometric accuracy of a metal test part manufactured by several service providers using either electron beam or laser based powder bed thermal fusion processes are described. The part was a circle-diamond-square

Hybridization Thermodynamics of Bound DNA

August 8, 2010
Author(s)
Brian E. Lang
Isothermal Titration Calorimetry was used to study the thermodynamics of hybridization on DNA-functionalized colloidal gold nanoparticles. When compared to the thermodynamics of hybridization of DNA that is free in solution, the differences in the values

Real Space Mapping of Magnetically Quantized Graphene States

August 8, 2010
Author(s)
Joseph A. Stroscio, D. L. Miller, Kevin Kubista, Gregory M. Rutter, Ming Ruan, Walt A. de Heer, Markus Kindermann, Phillip N. First
In a perpendicular magnetic field, the quantized independent-electron states (Landau levels) of graphene are degenerate in the valley degree of freedom and nearly-so in spin. The momentum-space valley degeneracy traces to the equivalence of the A and B
Displaying 48801 - 48825 of 143780
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