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NIST Authors in Bold

Displaying 26476 - 26500 of 73929

Full-wave Evaluation of Carbon Nanotubes as Microwave Interconnects

July 25, 2010
Author(s)
Kichul Kim, Paul Rice, Pavel Kabos, Dejan Filipovic
Microwave interconnect configurations composed of single wall carbon nanotubes (CNTs) are studied in this paper. Specifically, an atomic layer deposition (ALD) enabled nano-coaxial line with individual CNTs comprising the inner conductor, CNT Goubau line

Lights, Camera, Metrology: Introducing the Metrology Careers Outreach DVD

July 25, 2010
Author(s)
Elizabeth J. Benham
The National Conference of Standards Laboratories International (NCSLI) 164 Education Liaison and Outreach Committee has coordinated the development of a Metrology Career Multimedia DVD, titled "Find a Cool Career in Metrology." The DVD is designed for use

Measuring Step Gauges Using the NIST M48 CMM

July 25, 2010
Author(s)
John R. Stoup, Bryon S. Faust
The Moore M48 coordinate measuring machine (CMM) has provided NIST with unique and very flexible measurement capabilities for many years. The machine’s state of the art performance was further improved following the move of the machine into the new

NONLINEAR MODAL ANALYSIS AND SUPERPOSITION

July 25, 2010
Author(s)
Kevin K. Wong, John L. Harris
Linear modal analysis and superposition technique has been used extensively in earthquake engineering and seismic applications for decades, and it is here extended to the nonlinear domain by representing the material nonlinearity using the force analogy

Quantum-Based SI Traceable Electric-Field Probe

July 25, 2010
Author(s)
Joshua A. Gordon, Christopher L. Holloway, Steven R. Jefferts, Thomas P. Heavner
We are presently investigating the feasibility of developing a technique that will allow direct traceable microwave electric field (E-field) measurements. The new approach is based on atomic rf-resonance spectroscopy, where an applied electrical field

Superconducting Transition-Edge Sensors for Waveguide Coupled Single Photon Detection

July 25, 2010
Author(s)
Anna E. Fox, Adriana E. Lita, Brice R. Calkins, Kevin L. Silverman, Richard P. Mirin, Sae Woo Nam
We present the design and important preliminary superconducting properties of an evanescently coupled number resolving single photon detector operating near 1550 nm in development for integration into a silicon-on-insulator waveguide based optical system.

Temperature stabilization system with millikelvin gradients for refractometry

July 25, 2010
Author(s)
Patrick F. Egan, Jack A. Stone Jr.
Refractometry of air is a central problem for interferometer-based dimensional measurements. Refractometry at the 10^{-9} level is only valid if air temperature gradients are controlled at the millikelvin level. Very precise tests of second-generation NIST

A Shape-based Searching System for Industrial Components

July 24, 2010
Author(s)
Chun Pan (Benny) Cheung, Afzal A. Godil
A web-based application has been developed for shape-based searching for industrial components. The application is based on Flex, which is excellent at providing highly interactive user interfaces, and O3D, which can display 3D models in a web browser

Generation of optical Schrodinger cat states by number-resolved squeezed photon subtraction

July 23, 2010
Author(s)
Thomas Gerrits, Scott C. Glancy, Tracy S. Clement, Brice R. Calkins, Adriana E. Lita, Aaron J. Miller, Alan L. Migdall, Aaron J. Miller, Sae Woo Nam, Richard P. Mirin, Emanuel H. Knill
We have generated and measured an approximation of an optical Schrödinger cat state by photon subtraction from squeezed vacuum. Figure 1 shows the experimental scheme. Photons are probabilistically subtracted from squeezed vacuum and detected with a photon

Joint spectral distribution of a periodically poled KTP source for quantum information applications

July 23, 2010
Author(s)
Thomas Gerrits, Burm Baek, Martin J. Stevens, Tracy S. Clement, Sae Woo Nam, Robert Hadfield, Ryan Bennink, Warren Grice, Sander N. Dorenbos, Tony Zijlstra, Teun Klapwijk, Val Zwiller
We present our experimental results obtained from a periodically poled KTP (pp-KTP) crystal designed to produce a pure squeezed vacuum near 1550 nm. A pure squeezed vacuum in a single mode is one of the building blocks towards high fidelity optical cat

Ground-based observatory operations optimized and enhanced by direct atmospheric measurements

July 22, 2010
Author(s)
John T. McGraw, Peter C. Zimmer, Azzam Mansour, Dean C. Hines, Anthony B. Hull, Lisa Rossmann, Daniel C. Zirzow, Steven W. Brown, Gerald T. Fraser, Keith R. Lykke, Allan W. Smith, John T. Woodward IV, Christopher W. Stubbs
Earth's atmosphere represents a turbulent, turbid refractive element for every ground-based telescope. We describe the significantly enhanced and optimized operation of observatories supported by the combination of a lidar and spectrophotometer that allows

Hyper-Ramsey spectroscopy of optical clock transitions

July 22, 2010
Author(s)
Christopher W. Oates, V. I. Yudin, A. V. Taichenachev, Zeb Barber, Nathan D. Lemke, Andrew D. Ludlow, U Sterr, Ch. Lisdat, F Riehle
We present nonstandard optical Ramsey schemes that use pulses individually tailored in duration, phase and frequency to cancel spurious frequency shifts related to the excitation itself. In particular, the field shifts and their uncertainties can be

Ontological Product Modeling for Collaborative Design

July 22, 2010
Author(s)
Conrad E. Bock, XuanFang Zha, Hyo-won Suh, Jae H. Lee
This paper shows how to combine ontological and model-based techniques in languages that facilitate collaborative design exploration. The proposed approach uses ontology to capture alternative designs and incremental refinements that meet requirements and

Statistics of Camera-Based Single-Particle Tracking

July 22, 2010
Author(s)
Andrew J. Berglund
Through analysis of digital images, camera-based single-particle tracking enables quantitative determination of transport properties of nanoparticles and molecules and provides nanoscale information about material properties such as viscosity and

Using Thermodynamics to Simulate Cement Paste Microstructure Development

July 22, 2010
Author(s)
Jeffrey W. Bullard, Barbara Lothenbach, Paul E. Stutzman, Kenneth A. Snyder
We couple equilibrium thermodynamic calculations to a 3D microstructure model to simulate microstructure development during hydration of portland cement paste. The model uses a collection of growth/dissolution rules to approximate a range of growth modes
Displaying 26476 - 26500 of 73929
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