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Conferences

Infrared hemispherical reflectance of carbon nanotube mats and arrays in the 5 um to 50 um wavelength region

July 15, 2012

Author(s)

John H. Lehman, C J. Chunnilall, Evangelos Theocharous, Aric W. Sanders

We present the absolute infrared (5 μm to 50 μm) reflectance of films produced from commercially available carbon nanotubes. Data were obtained using the...

Highly Charged Ions in Rare Earth Permanent Magnet Penning Traps

July 13, 2012

Author(s)

Nicholas D. Guise, Samuel Brewer, Joseph Tan

A newly constructed apparatus at the United States National Institute of Standards and Technology (NIST) is designed for the isolation, manipulation, and study...

Testing Environments for Assessing Conformance and Interoperability

July 12, 2012

Author(s)

Robert D. Snelick, Leonard E. Gebase

We present a classification framework of testing environments that support conformance and interoperability testing of distributed systems. We describe each...

Dynamic customization and validation of product data models using the semantic web tools

July 12, 2012

Author(s)

Sylvere I. Krima, Allison Barnard Feeney, Sebti Foufou

Product Lifecycle Management (PLM) has always required robust solutions for representing product data models. Product data models enable in-formation exchange...

Data Dependency on Measurement Uncertainties in Speaker Recognition Evaluation

July 11, 2012

Author(s)

Jin Chu Wu, Alvin F. Martin, Craig S. Greenberg, Raghu N. Kacker

The National Institute of Standards and Technology conducts an ongoing series of Speaker Recognition Evaluations (SRE). Speaker detection performance is...

A method for comparing remote optical clocks over a free-space optical link

July 9, 2012

Author(s)

William C. Swann, Fabrizio R. Giorgetta, Ian R. Coddington, Esther Baumann, Jean-Daniel Deschenes, Laura C. Sinclair, Alexander M. Zolot, Nathan R. Newbury

We demonstrate a method to compare optical clocks approaching 10 -17 uncertainties through the exchange of optical pulses from phase-locked frequency combs. We...

Room Temperature Acoustic Transducers for High-Temperature Thermometry

July 9, 2012

Author(s)

Dean C. Ripple, William E. Murdock, Gregory F. Strouse, Keith A. Gillis, Michael R. Moldover

We have successfully conducted highly-accurate, primary acoustic thermometry at 600 K using a sound source and a sound detector at room temperature. We describe...

Traceability of high-speed electrical waveforms at NIST, NPL, and PTB

July 6, 2012

Author(s)

Paul D. Hale, Dylan F. Williams, Andrew M. Dienstfrey, Chih-Ming Wang, Jeffrey A. Jargon, David Humphreys, Matthew Harper, Heiko Fuser, Mark Bieler

Instruments for measuring high-speed waveforms typically require calibration to obtain accurate results. The national metrology institutes of the United States...

Displacement Sensor for Detecting Sub-micrometer Motion

July 6, 2012

Author(s)

Svetlana Avramov-Zamurovic1, Jae M. Yoo, Nicholas Dagalakis, Rae Duk Lee

This paper describes the design of a nano displacement sensor that detects the presence of a moving platform by using fringing electric field. Its electrodes...

The Permanent Magnet System for NIST-4

July 2, 2012

Author(s)

Stephan Schlamminger

At the National Institute of Standards and Technology a new watt balance, NIST-4, is currently being designed. This apparatus will be used to realize the base...

International time and frequency comparisons in real time: recent results

July 2, 2012

Author(s)

Michael A. Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, Eduardo de Carlos Lopez

Within the Sistema Interamericano de Metrologia (SIM) region, a time comparison network, SIMTN, has been developed. The SIMTN continuously compares the time...

Standardizing Rectangular Metallic Waveguides for Terahertz Applications

July 1, 2012

Author(s)

Ronald A. Ginley, N M. Ridler

This paper describes an on-going activity to develop an international document standard for defining rectangular metallic waveguides for use in the...

Method for Ensuring Accurate AC Waveforms with Programmable Josephson Voltage Standards

July 1, 2012

Author(s)

Charles J. Burroughs, Alain Rufenacht, Samuel P. Benz, Paul D. Dresselhaus

The amplitudes of stepwise-approximated sine waves produced by programmable Josephson voltage standards (PJVSs) are not intrinsically accurate because the...

Testing Phasor Measurement Units using the IEEE 1588 Precision Time Protocol

July 1, 2012

Author(s)

Julien M. Amelot, Gerard N. Stenbakken

As the electric power grid is changing to a smarter more dynamically controlled system, there is increasing need for measurements that show the global status of...

A Direct Comparison System for Power Calibration up to 67 GHz*

July 1, 2012

Author(s)

Thomas M. Wallis, Thomas P. Crowley, Denis X. LeGolvan, Ronald A. Ginley

A direct comparison system for calibration of power sensors with 1.85 mm precision coaxial connectors up to 67 GHz has been developed. The comparison is...

On the Molar Mass of Silicon for a New Avogadro Constant

July 1, 2012

Author(s)

Gregory C. Turk, Robert D. Vocke Jr., Savelas A. Rabb

Calibration Techniques for Scanning Microwave Microscopy

July 1, 2012

Author(s)

Thomas M. Wallis, Atif A. Imtiaz, Alexandra Curtin, Pavel Kabos, H. P. Huber, Joseph J. Kopanski, F. Kienberger

Two techniques are described for calibrating a scanning microwave microscope (SMM). The first technique enables spatially-resolved absolute capacitance...

A Verification Method for Noise-Temperature Measurements on Cryogenic Low-Noise Amplifiers

July 1, 2012

Author(s)

Dazhen Gu, Derek A. Houtz, James P. Randa, Dave K. Walker

We report a verification method for noise-temperature (NT) measurements on cryogenic low noise amplifiers (LNAs) at liquid helium temperature. The method uses...

Testing Phasor Measurement Units Using IEEE 1588 Precision Time Protocol

July 1, 2012

Author(s)

Julien M. Amelot, Gerard Stenbakken

As the electric power grid is changing to a smarter more dynamically controlled system, there is increasing need for measurements that show the global status of...

Towards a fixed value of the Planck constant: reproducibility and an updated NIST-3 watt balance

July 1, 2012

Author(s)

Darine El Haddad, Stephan Schlamminger, David B. Newell, Ruimin Liu, Edwin R. Williams, Jon R. Pratt

The scientific community is presently engaged in a historic attempt to fix the value of the Planck constant h so that it might ultimately serve as a base...

The Planck constant, watt and vacuum balances, and an evolving Mise en pratique for the kilogram in North America

July 1, 2012

Author(s)

Jon R. Pratt, David B. Newell, Zeina J. Kubarych, Stephan Schlamminger, Darine El Haddad, Ruimin Liu, Edwin R. Williams, Dave Inglis, Barry M. Wood, Carlos Sanchez, Richard Green

We report preparations underway at the National Institute of Standards and Technology (NIST) in the United States and at the National Research Council (NRC) in...

Differential Sampling Measurement of a 7 V rms Sine Wave and a Programmable Josephson Voltage Standard

July 1, 2012

Author(s)

Alain Rufenacht, Charles J. Burroughs, Samuel Benz, Paul Dresselhaus

A 10 V programmable Josephson voltage standard has enabled sine waves with rms voltages up to 7 V to be accurately measured with differential sampling methods...

Quantum Calibration System for AC Measurement Standards using Inductive Voltage Dividers

July 1, 2012

Author(s)

Thomas Hagen, Ilya F. Budovsky, Samuel Benz, Charles J. Burroughs

A pulse driven ac Josephson voltage standard (ACJVS) has been set up at the National Measurement Institute, Australia (NMIA) with the help of the National...

A Digital-to-Analog Converter with a Voltage Standard Reference

July 1, 2012

Author(s)

Alain Rufenacht, Charles J. Burroughs, Samuel Benz, Paul Dresselhaus

Commercially available 20-bit digital to analog converters (DACs) have the potential to impact the field of low frequency voltage metrology. We measured a...

Flat frequency response in the electronic measurement of the Boltzmann constant

July 1, 2012

Author(s)

Jifeng Qu, Samuel Benz, Yang Fu, Jianqiang Zhang, Horst Rogalla, Alessio Pollarolo

A new quantum voltage calibrated Johnson noise thermometer (JNT) was developed at NIM to demonstrate the electrical approach that determines the Boltzmann...

Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor

July 1, 2012

Author(s)

Alessio Pollarolo, Tae H. Jeong, Samuel Benz, Horst Rogalla

In 2010 NIST measured the Boltzmann constant k by use of an electronic technique that measured the Johnson noise of a 100 Ohm resistor at the triple point of...

Maximum Life Span Strategy for Target Tracking in Mobile Sensor Networks

June 29, 2012

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian, Hamid Mahboubi, Amir G. Aghdam, Walid Masoudimansour

In this paper, an energy-efficient technique is proposed for tracking a target in a field using a network of mobile sensors while maximizing the life span of...

Safe Control of Manufacturing Vehicles Research Towards Standard Test Methods

June 28, 2012

Author(s)

Roger V. Bostelman, William P. Shackleford, Geraldine S. Cheok, Kamel S. Saidi

The National Institute of Standards and Technology's Intelligent Systems Division has been researching several areas leading to safe control of manufacturing...

RESONANCE ENERGY TRANSFER AS A TOOL FOR PROBING INTERFACE FORMATION IN NANOCOMPOSITES

June 24, 2012

Author(s)

Mauro Zammarano, Edward D. McCarthy, Douglas M. Fox, Paul H. Maupin, Li Piin Sung, Yeon S. Kim

One of the most enduring problems in the evolution of science and technology using nanoscale materials is the characterization of their morphology in...

Solid-Phase Synthesis of Ammonium Ionenes

June 24, 2012

Author(s)

Matthew T. Hunley, Kathryn L. Beers

Ionenes are polyelectrolytes with the charge along the polymer backbone. These polymers possess a precisely-defined charge density, making them ideal as...

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