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Displaying 26726 - 26750 of 73832

Effects of disorder and internal dynamics on vortex wall propagation

May 26, 2010
Author(s)
Hongki Min, Robert D. McMichael, Michael J. Donahue, Jacques Miltat, Mark D. Stiles
Experimental measurements of domain wall propagation are typically interpreted by comparison to ideal models that ignore the effects of extrinsic disorder and the internal dynamics of domain wall structures. Using micromagnetic simulations we study vortex

A common-view disciplined oscillator

May 24, 2010
Author(s)
Michael A. Lombardi, Aaron P. Dahlen
This paper describes a common-view disciplined oscillator (CVDO) that locks to a reference time scale through the use of common-view Global Positioning System (GPS) satellite measurements. A Proportional-Integral-Derivative (PID) controller obtains near

Competitive Adsorption of Thiolated Polyethylene Glycol and Mercaptoproprionic acid on Gold Nanoparticles Measured by Physical Characterization Methods

May 24, 2010
Author(s)
De-Hao D. Tsai, Frank W. DelRio, Robert I. MacCuspie, Tae Joon Cho, Michael R. Zachariah, Vincent A. Hackley
Adsorption kinetics between thiolated polyethylene glycol (SH-PEG) and mercaptoproprionic acid (MPA) on gold nanoparticles (Au-NP) were studied using dynamic light scattering (DLS) and electrospray differential mobility analysis (ES-DMA). Through a

Operating quantum waveguide circuits with superconducting single-photon detectors

May 24, 2010
Author(s)
C. M. Natarajan, A. Peruzzo, Shigehito Miki, Masahide Sasaki, Z. Wang, Burm Baek, Sae Woo Nam, Robert Hadfield, Jeremy L. O'Brien
Advanced quantum information science and technology (QIST) applications place exacting demands on optical components. Quantum waveguide circuits offer a route to scalable QIST on a chip. Superconducting single-photon detectors (SSPDs) provide infrared

Electro-optic sampling for traceable high-speed electrical measurements

May 23, 2010
Author(s)
Paul D. Hale, Dylan F. Williams
We will describe how the complex frequency response of a high-speed photodiode is calibrated by use of electro-optic sampling. Our uncertainty analysis includes a unique covariance-matrix based method that allows us to transform uncertainties between the

Mechanical properties of one-dimensional nanostructures

May 23, 2010
Author(s)
Gheorghe Stan, Robert F. Cook
The elastic mechanical properties of one-dimensional nanostructures are considered, with an emphasis on the use of contact-resonance atomic force microscopy methods to determine elastic moduli. Various methods used to determine elastic moduli of one

Modeling and metrology of metallic nanowires with application to microwave interconnects

May 23, 2010
Author(s)
Kichul Kim, Thomas M. Wallis, Paul Rice, Chin J. Chiang, Atif A. Imtiaz, Pavel Kabos, Jintao Zhang
Abstract: Broadband characterization of individual metallic nanowires for microwave interconnect applications is discussed. Circuit and method of moments (MoM) modeling are benchmarked using a set of coplanar waveguide (CPW) test devices with microwire Au

Third-Order Intermodulation Distortion due to Self-heating in Gold Coplanar Waveguides

May 23, 2010
Author(s)
Eduard Rocas, Juan C. Collado Gomez, Nathan D. Orloff, James C. Booth
We present measurements and modeling of a self-heating mechanism responsible for third order intermodulation distortion in coplanar waveguide transmission lines. Temperature fluctuations, at the envelope frequency of the input signal, induce dynamic

An Evaluation of Technologies for Knowledge Base Population

May 21, 2010
Author(s)
Hoa T. Dang, Paul McNamee, Heather Simpson, Patrick Schone, Stephanie Strassel
Previous content extraction evaluations have neglected to address problems which complicate the incorporation of extracted information into an existing knowledge base. Previous question answering evaluations have likewise avoided tasks such as explicit

Core-shell composite of SiCN and multiwalled carbon nanotubes from Toluene dispersion

May 21, 2010
Author(s)
John H. Lehman, Katherine E. Hurst, Gurpreet Singh, Elisabeth Mansfield, John D. Perkins, Christopher L. Cromer
Carbon nanotubes are known to have high thermal conductivity, and in bulk form, a topology that could constitute the matrix of an inhomogeneous solid. Among the promised applications of carbon nanotubes is a composite material that is practical for thermal

A Graphical Approach for Assessing High Strength Fiber Performance

May 20, 2010
Author(s)
Walter G. McDonough, Gale A. Holmes, Amanda L. Forster, Kirk D. Rice
The design and materials used for bullet resistant body armor have evolved continuously to keep up with the threats. In this paper, a graphical approach is presented that plots the potential strain energy absorption of some common high performance fibers

CCEM.RF-K4.CL Comparison RF-Voltage measurements up to 1 GHz

May 20, 2010
Author(s)
James P. Randa, Jan P. de Vreede
We report the results of an international comparison of measurements of radio frequency voltage in the frequency range 1 MHz to 1 GHz. This comparison was performed as a Key Comparison under the auspices of the Consultative Committee for Electricity and
Displaying 26726 - 26750 of 73832
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