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Conferences

Incorporating Attribute Value Uncertainty into Decision Analysis

May 28, 2012

Author(s)

Dennis D. Leber, Jeffery W. Herrmann

Attribute value uncertainty is present in a decision when the consequences are characterized by uncertain estimates of the underlying, unknown true values...

Modeling Gaps and Overlaps of Sustainability Standards

May 28, 2012

Author(s)

Paul W. Witherell, Sudarsan Rachuri, Anna D'Alessio

Organizational and production dispersions in manufacturing enterprises can create situations where manufacturers are asked to conform to multiple sustainability...

Magnetic-Dipole Transitions in Tungsten and Other Heavy Elements Observed with the NIST EBIT

May 25, 2012

Author(s)

Joseph Reader, John Gillaspy, Dmitry D. Osin, Yuri Ralchenko

We describe recent observations with the electron beam ion trap (EBIT) at the National Institute of Standards and Technology (NIST) in which we observed large...

Towards a Metric for Communication Network Vulnerability to Attacks: A Game Theoretic Approach

May 25, 2012

Author(s)

Assane Gueye, Vladimir V. Marbukh, Jean C. Walrand

In this paper, we propose a quantification of the vulnerability of a communication network when links are subject to failures due to the actions of a strategic...

Quality Information Framework - Integrating Metrology Processes

May 25, 2012

Author(s)

Fiona Zhao, Thomas Kramer, John A. Horst, William G. Rippey, Robert Brown

As defined by major dimensional metrology system users and suppliers, the Quality Information Framework (QIF) is an integrated and holistic set of information...

Formation of optical flux lattices for ultra cold atoms

May 24, 2012

Author(s)

Ian B. Spielman, Gediminas Juzeliunas

We explore the optical flux lattices produced for ultra-cold atoms in the radiation field when both the atom-light coupling and the detuning exhibit an...

Statistical comparisons of single PPTA fiber tensile behaviors measured by different gripping methods

May 24, 2012

Author(s)

Jae Hyun Kim, Nathanael A. Heckert, Stefan D. Leigh, Haruki Kobayashi, Walter G. McDonough, Kirk D. Rice, Gale A. Holmes

A new single fiber tensile test method using the Kolsky bar is being utilized to investigate fiber properties under high strain rate conditions. Since fiber...

Mechanical stabilization of a microrod-resonator optical frequency

May 24, 2012

Author(s)

Scott B. Papp, Pascal P. Del'Haye, Scott A. Diddams

We present line-spacing frequency control of a microresonator-based optical frequency comb by way of mechanical actuation. Using this novel technique we have...

A hybrid 10 GHz photonic-microwave oscillator with sub-femtosecond absolute timing jitter

May 24, 2012

Author(s)

Tara M. Fortier, Craig W. Nelson, Archita Hati, Franklyn J. Quinlan, Jennifer A. Taylor, Haifeng (. Jiang, Chin-Wen Chou, Nathan D. Lemke, Andrew D. Ludlow, David A. Howe, Christopher W. Oates, Scott A. Diddams

We demonstrate a 10 GHz hybrid oscillator comprised of a phase stabilized optical frequency comb divider and a room temperature dielectric sapphire oscillator...

A new algorithm for clock weights for the SIM time scale

May 24, 2012

Author(s)

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

A time and frequency comparison system has been developed for the Sistema Interamericano de Metrologia (SIM) region in order to compare in real time the time...

Blackbody effects in the Yb optical lattice clock

May 24, 2012

Author(s)

Andrew D. Ludlow, Jeffrey A. Sherman, Nathan D. Lemke, Kyle P. Beloy, Nathan M. Hinkley, M. Pizzocaro, Richard W. Fox, Christopher W. Oates

We report a high accuracy measurement of the differential static polarizability for the clock transition in a Yb lattice clock, a key parameter for determining...

Common-Arm Counter Propagating Phase Bridge for Vibration Sensitivity Measurement

May 24, 2012

Author(s)

Danielle G. Lirette, Corey A. Barnes, Archita Hati, Jason A. DeSalvo, Craig W. Nelson, David A. Howe

Current methods for measuring the vibration sensitivity of microwave devices are primarily limited by choice of cables connecting a stationary platform to a...

Phase-Noise Measurement of a 670 GHz Source

May 24, 2012

Author(s)

Jason A. DeSalvo, Archita Hati, Craig W. Nelson, David A. Howe

We present phase-noise measurements in support of terahertz electronics. Using digital phase-noise measurement techniques and an even-harmonic mixer, we achieve...

PM-AM Correlation Measurements and Analysis

May 24, 2012

Author(s)

David A. Howe, Archita Hati, Craig W. Nelson, Danielle G. Lirette

We measure and analyze effects of nonlinear mixing of phase-noise modulation (PM) and amplitude-noise modulation (AM) in an oscillating signal by real-time...

A Sub-Sampling Digital PM/AM Noise Measurement System

May 24, 2012

Author(s)

Craig W. Nelson, David A. Howe

A digital phase/amplitude modulation (PM/AM) noise measurement system (DNMS) implementing field programmable gate array (FPGA) based digital down converters...

Vibrational analysis of stabilized lasers

May 24, 2012

Author(s)

Kenneth J. Hughes, Archita Hati, Craig W. Nelson, David A. Howe

Frequency-stabilized lasers are routinely used in a variety of research and application areas relating to laser-cooled atoms. Important applications in the cold...

Ultra-low-noise Regenerative Frequency Divider for High Spectral Purity RF Signal Generation

May 24, 2012

Author(s)

Archita Hati, Craig W. Nelson, Corey A. Barnes, Danielle G. Lirette, Jason A. DeSalvo, Tara M. Fortier, Franklyn J. Quinlan, Andrew D. Ludlow, Till P. Rosenband, Scott A. Diddams, David A. Howe

We implement an ultra-low-noise frequency divider chain from 8 GHz to 5 MHz that utilizes custom-built regenerative frequency divide-by-2 circuits. The single...

A Compact Cold-Atom Frequency Standard Based on Coherent Population Trapping

May 24, 2012

Author(s)

Francois-Xavier R. Esnault, John Kitching, Elizabeth Donley

We present the status of our cold-atom clock based on coherent population trapping, including the present clock stability and a preliminary evaluation of the...

A high stability optical frequency reference based on thermal calcium atoms

May 24, 2012

Author(s)

Richard W. Fox, Jeffrey Sherman, W. Douglas, Judith B. Olson, Andrew Ludlow, Christopher W. Oates

Here we report an imprecision below 10 -14 with a simple, compact optical frequency standard based upon thermal calcium atoms. Using a Ramsey-Borde spectrometer...

Standard Test Procedures and Metrics Development for Automated Guided Vehicle Safety Standards

May 23, 2012

Author(s)

Roger V. Bostelman, William P. Shackleford, Geraldine S. Cheok, Richard J. Norcross

The National Institute of Standards and Technology's Intelligent Systems Division has been researching automated guided vehicle (AGV) control based on advanced...

Image-based 3D Mapping of Rebar Location for Automated Assessment of Safe Drilling Areas Prior to Placing Embedments in Concrete Bridge Decks

May 23, 2012

Author(s)

Mani Golparvar-Fard, Behshad Ghadimi, Kamel Saidi, Geraldine Cheok, Marek Franaszek, Robert R. Lipman

This paper presents a new image-based approach for 3D mapping the locations of the rebar and embedded components in a railway bridge deck prior to placement of...

A Case Study of 3D Imaging Productivity Needs to Support Infrastructure Construction

May 23, 2012

Author(s)

Gabriel Dadi, Paul Goodrum, Kamel Saidi, Christopher U. Brown, Joseph Betit

The national infrastructure system is at a crossroads with a need for renewal and expansion in the most efficient manner possible. Light railway construction...

Augmenting BIM with 3D Imaging Data to Control Drilling for Embeds into Reinforced Concrete Bridge Decks

May 22, 2012

Author(s)

Manu Akula, Robert R. Lipman, Marek Franaszek, Kamel Saidi, Geraldine Cheok, Vineet Kamat

Placing embeds into reinforced concrete structures, after concrete is poured, without damaging reinforcement bars (rebar) is an industry-wide challenge...

Anisotropic Field Evaporation of Diatomic Species from Oxides and Nitrides

May 21, 2012

Author(s)

Matthew D. Brubaker, David R. Diercks, R Kirchofer, Kristine A. Bertness, Norman A. Sanford, Brian Gorman

Recent work using laser-assisted atom probe tomography on non-metallic materials has indicated that for many data collection conditions, anisotropic evaporation...

A thickness-shear MEMS resonator employing electromechanical transduction through a coplanar waveguide

May 21, 2012

Author(s)

Ward L. Johnson, Thomas M. Wallis, Pavel Kabos, Eduard Rocas, Juan C. Collado Gomez, Li-Anne Liew, Albert Davydov, Alivia Plankis, Paul R. Heyliger

The design, modeling, fabrication, and characterization of a vibrationally trapped thickness-shear MEMS resonator is presented. This device is intended to avoid...

Microscopy for STEM Educators

May 21, 2012

Author(s)

Michael T. Postek, Mary B. Satterfield, Bradley N. Damazo, Robert Gordon

The future of our nation hinges on our ability to prepare our next generation to be innovators in science, technology, engineering and math (STEM). Excitement...

Creating HAVIC: Heterogeneous Audio Visual Internet Collection

May 21, 2012

Author(s)

Stephanie Strassel, Amanda Morris, Jonathan G. Fiscus, Christopher Caruso, Haejoong Lee, Paul D. Over, James Fiumara, Barbara L. Shaw, Brian Antonishek, Martial Michel

Linguistic Data Consortium and the National Institute of Standards and Technology are collaborating to create a large, heterogeneous annotated multimodal corpus...

Using Competitions to Advance the Development of Standard Test Methods for Response Robots

May 17, 2012

Author(s)

Adam S. Jacoff, Raymond Sheh, Ann Virts, Tetsuya Kimura, Johannes Pellenz, Soren Schwertfeger, Jackrit Suthakorn

Competitions are an effective aid to the development and dissemination of standard test methods, especially in rapidly developing, highly varied fields such as...

Integrating Occlusion Monitoring into Human Tracking for Robot Speed and Separation Monitoring

May 16, 2012

Author(s)

William P. Shackleford, Sandor S. Szabo, Richard J. Norcross, Jeremy A. Marvel

Collaborative robots work in close proximity to humans to perform a variety of tasks, while more traditional industrial robots need to be shut down whenever a...

Elastic and Viscoelastic Properties of Calcium Silicate Hydrate

May 15, 2012

Author(s)

Zachary Grasley, Jones Christopher, X Li, Edward Garboczi, Jeffrey W. Bullard

In order to effectively predict the mechanical properties of concrete and other cementitious materials, it is useful to understand the properties and...

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