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Displaying 29201 - 29225 of 74036

On The Security Performance of Physical-Layer Network Coding

January 5, 2009
Author(s)
Yi Qian, Kejie Lu, Shengli Fu, Tao Zhang
Physical-layer network coding (PLNC) is a novel wireless communication technology, in which multiple transmitters can send signals on the same channel to the same receiver at the same time. Our previous studies have revealed that PLNC can substantially

Optimization of photon pair generation in dual-element PPKTP waveguide1

January 5, 2009
Author(s)
Xiao Tang, Oliver T. Slattery, Lijun Ma
A compact scheme for high-speed frequency doubling and down-conversion on a single dual-element PPKTP waveguide is investigated. Optimal temperature is achieved and photon pair coincidence is observed at over GHz repetition rate with pulsed pump input

A Low-Cost Density Reference Phantom for Computed Tomography

January 2, 2009
Author(s)
Zachary H. Levine, Ming-Dong Li, Anthony P. Reeves, David F. Yankelevitz, Joseph J. Chen, Eliot L. Siegel, Adele P. Peskin, Diana N. Zeiger
We have characterized a commercially-available polyurethane foam which is marketed for modeling parts in the aircraft, automotive, and related industries. We find that the foam may be suitable for use as a density reference standard in the range below -700

SRM NIST Standard Reference Materials Catalog, January 2009

January 2, 2009
Author(s)
Joan C. Sauerwein, Regina R. Montgomery
NIST Standard Reference Materials (SRMs) are used by industry, government, and academia to ensure the highest quality measurements. This catalog lists over 1100 individual reference materials produced and sold by NIST, each with carefully assigned values

A vacuum manifold for rapid world-to-chip connectivity of complex PDMS microdevices

January 1, 2009
Author(s)
Gregory A. Cooksey, Anne L. Plant, Francisco J. Atencia
The lack of simple interfaces for microfluidic devices with a large number of inlets significantly limits production and utilization of these devices. In this paper, we describe the fabrication of a reusable manifold that provides rapid world-to-chip

Advice from the CCL on the use of unstabilized lasers as standards of wavelength: the helium-neon laser at 633 nm

January 1, 2009
Author(s)
Jack A. Stone Jr., Jennifer Decker, Patrick Gill, Andrew Lewis, Patrick Juncar, Daniele Rovera, Miguel Villiseid
The Consultative Committee for Length has recommended that red (633 nm) unstabilized Helium-Neon lasers, operating on the 3s2¿_2p4 transition, should be included in the list of standard frequencies for realization of the meter. This article discusses
Displaying 29201 - 29225 of 74036
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