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Displaying 22701 - 22725 of 73783

A near-field scanning microwave microscope for characterization of inhomogeneous photovoltaics

August 10, 2012
Author(s)
Joel C. Weber, Kristine A. Bertness, John B. Schlager, Norman A. Sanford, Atif A. Imtiaz, Thomas M. Wallis, Pavel Kabos, Kevin J. Coakley, Victor Bright, Lorelle M. Mansfield
We present a near field scanning microwave microscope (NSMM) optimized for imaging photovoltaic samples. Our system incorporates a cut Pt-Ir tip inserted into an open ended coaxial cable to form a weak resonator, allowing the microwave reflection S11

Are intelligent agents the key to optimizing building HVAC system performance?

August 10, 2012
Author(s)
George E. Kelly, Steven T. Bushby
This paper describes the development and implementation of a simulation testbed used to study the concept of employing intelligent agents to optimize the performance of building Heating, Ventilating, and Air Conditioning (HVAC) systems. One day simulated

Noble gas viscosities at 25 degrees C

August 10, 2012
Author(s)
Robert F. Berg, William C. Burton
Near 25 C, ab initio calculations of the zero-density viscosity of helium gas eta_He have an uncertainty of approximately 0.001 %, which is 1/40th of the uncertainty of the best measurements. The uncertainties of the published calculations for neon [Bich

Optical Trapping in Air of an Individual Nanotube-Sphere Device

August 10, 2012
Author(s)
Andrew J. Slifka, Gurpreet Singh, Paul Rice, Damian S. Lauria, Roop Mahajan
We demonstrate the optical manipulation of a polystyrene bead in air attached to an individual carbon nanotube. In continuation of our previous work [1] we have also utilized this technique to demonstrate the calibration of a nanotube-sphere (NT-sphere)

Wireless Technologies in Healthcare: Selected Papers from IEEE PIMRC 2011

August 10, 2012
Author(s)
Kamran Sayrafian, Kamya Yekeh Yazdandoost
The use of wireless technologies for medical device communication, health monitoring (at hospitals or homes) and mobile healthcare information delivery (i.e. m-Health) is one of the most rapidly growing areas in health-IT research today. The papers which

Current-induced synchronized switching of magnetization

August 7, 2012
Author(s)
Kyung Jin Lee, Soo-Man Seo
We propose a multilayer structure that allows a reduced switching current with maintaining high thermal stability of the magnetization. It consists of a perpendicular polarizer, a perpendicular free-layer, and an additional free-layer having in-plane

Unwanted Combustion Enhancement by C6F12O Fire Suppressant

August 7, 2012
Author(s)
Gregory T. Linteris, Valeri I. Babushok, Peter B. Sunderland, Fumiaki Takahashi, Viswanath R. Katta, Oliver Meier
Several agents are under consideration to replace CF3Br for use in suppressing fires in aircraft cargo bays. In a Federal Aviation Administration (FAA) performance test simulating the explosion of an aerosol can, however, the replacements, when added at

An Exploration of the Operational Ramifications of Lossless Compression of 1000 ppi Fingerprint Imagery

August 6, 2012
Author(s)
Shahram Orandi, John M. Libert, John D. Grantham, Kenneth Ko, Stephen S. Wood, Jin Chu Wu, Lindsay M. Petersen, Bruce Bandini
This paper presents the findings of a study initially conducted to measure the operational impact of JPEG 2000 lossy compression on 1000 ppi fingerprint imagery at various levels of compression, but later expanded to include lossless compression. Lossless

Computer Security Incident Handling Guide

August 6, 2012
Author(s)
Paul R. Cichonski, Thomas Millar, Timothy Grance, Karen Scarfone
Computer security incident response has become an important component of information technology (IT) programs. Security-related threats have become not only more numerous and diverse but also more damaging and disruptive. An incident response capability is

Coupled-cavity ring-down spectroscopy technique

August 6, 2012
Author(s)
Jeremie B. Courtois, Joseph T. Hodges
We present a technique called coupled-cavity ring-down spectroscopy (CC-RDS) for controlling the finesse of an optical resonator. Applications include extending the sensitivity and dynamic range of a cavity-enhanced spectrometer, as well as widening the

Estimating Heterogeneity Variance in Meta-Analysis

August 6, 2012
Author(s)
Andrew L. Rukhin
Several new estimators of the between-study variability in a heterogeneous random effects meta-analysis model are derived. One of them can be interpreted as the empirical Bayes procedure for a diffuse prior with the given prior mean. Another is the

Nanocrystalline Zinc Oxide Powder for X-ray Diffraction Metrology

August 6, 2012
Author(s)
David R. Black, Joseph J. Ritter, John E. Bonevich, Albert Henins, James P. Cline
Nano scale zinc oxide powder has been produced using a precise thermal decomposition process from a zinc oxalate precursor powder. The size of the crystallites is determined by the specifics of the thermal processing which were chosen to yield crystallites

On Lower Bound Antenna Efficiency Measurements in a Reverberation Chamber

August 6, 2012
Author(s)
Jason B. Coder, John M. Ladbury
This paper addresses a few specific aspects of measuring the lower bound of antenna efficiency in a reverberation chamber. While the initial method for measuring the lower bound of efficiency has been presented, three key revisions are discussed here: (1)

Not Your Mother's Web3D: Integrating X3DOM, jQuery and HTML5

August 4, 2012
Author(s)
Sanford P. Ressler
This tutorial, for intermediate users, is suitable for educators, scientists and artists, with some 3D and programming experience, (all attendees). The benefits of declarative 3D markup, as realized by X3DOM will be emphasized in the context of integration

Dual-channel, single-photon upconversion detector at 1.3 mm

August 3, 2012
Author(s)
Jason S. Pelc, Paulina Kuo, Oliver T. Slattery, Lijun Ma, Xiao Tang, Martin M. Fejer
We demonstrate efficient, single-photon upconversion detection of two wavelengths in the 1300-nm band. The upconversion detector is based on a phase-modulated, periodically poled LiNbO3 waveguide that simultaneously quasi-phasematches two sum-frequency

Dual-channel, single-photon upconversion detector at 1300 nm

August 3, 2012
Author(s)
Paulina Kuo, Jason S. Pelc, Oliver T. Slattery, Lijun Ma, Martin M. Fejer, Xiao Tang
We show a dual-channel, upconversion detector at 1.3-m-wavelength based on phasemodulated periodically poled LiNbO3, and use it for wavelength- to time-division multiplexing to achieve high data rates, useful for quantum key distribution.
Displaying 22701 - 22725 of 73783
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