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Conferences

Optical frequency transfer over 38 km of installed fiber at less than 3x10^-19 residual fractional instability

July 23, 2007

Author(s)

Paul A. Williams, William C. Swann, Nathan R. Newbury

We transmit a narrow-linewidth cw laser at 1535 nm across 38 km of installed fiber. Through standard Doppler-cancellation techniques, we achieve a residual...

Slab-coupled optical waveguide devices for low-noise signal generation

July 23, 2007

Author(s)

Paul W. Juodawlkis, Frederick J. O'Donnell, Jason J. Plant, John B. Schlager

We review the use of slab-coupled optical waveguide amplifiers (SCOWAs) in low-noise mode-locked and single-frequency lasers. We also report a new single...

Problems with Kendall's Tau

July 23, 2007

Author(s)

Mark Sanderson, Ian Soboroff

Test collections are most useful when they are reusable, that is, when they can be reliably used to rank systems that did not contribute to the pools. Pooled...

Reliable Information Retrieval Evaluation With Incomplete and Biased Judgements

July 23, 2007

Author(s)

Stefan Buttcher, Charles L. Clarke, Peter C. Yeung, Ian Soboroff

Information retrieval evaluation based on the pooling method is inherently biased against systems that did not contribute to the pool of judged documents. This...

Verification, Validation, and Variability of Virtual Standards

July 18, 2007

Author(s)

Dale P. Bentz

As the potential of computer modeling of hydration and microstructure development of cement-based materials approaches realization, the development of virtual...

Impedance Measurements of Inertance Tubes at High Frequency and Pressure

July 16, 2007

Author(s)

Michael A. Lewis, Ryan P. Taylor, Peter E. Bradley, Ray Radebaugh, Gershon Grossman, Zhihua Gan

Previous comparisons between measured and calculated inertance tube impedance were made at frequencies below 70 Hz and average pressures below 3 MPa. In this...

Measuring Shielding Effectiveness of Small Enclosures/Cavities with a Reverberation Chamber

July 16, 2007

Author(s)

Christopher L. Holloway, John M. Ladbury, Jason Coder, Galen H. Koepke, David A. Hill

For various applications, there is a growing need to determine the shielding effectiveness of physically small, but electrically large, enclosures or cavities...

Analysis of Welding Parameter Distribution in Stud Arc Welding

July 15, 2007

Author(s)

Ivan Samardzic, Stefanija Klaric, Thomas A. Siewert

This paper describes the application of on-line monitoring system for recording welding current and voltage during stud arc welding with a ceramic ferrule...

Fundamental Reaction-Transport Model for Simulating Microstructure Development in Hydrating Cement Pastes

July 13, 2007

Author(s)

Jeffrey W. Bullard

RoHS Harmonization - Progress Toward a Single Global Standard?

July 13, 2007

Author(s)

Eric D. Simmon

The lack of global harmonization of RoHS initiatives has been a major headache for the electronics industry, to say the least. A number of organizations have...

Measuring the Luminance of a Retroreflective Sign

July 11, 2007

Author(s)

Carl C. Miller, T Heimer, Tim Donahue, M Schwartz, David Kuniega

The area of retroreflective signage for traffic control is moving from fixed retroreflective requirements to a traffic scenario/performance based system. CIE...

Pilot Study on Daytime Color Appearance of Retroreflective Sheeting

July 11, 2007

Author(s)

Wendy L. Davis, Carl C. Miller, Jason Kennedy, Carl Andersen

In this experiment, reference instrument measurements of the chromaticity of retroreflective materials were compared with human visual perceptions of their...

Measurement of Solid-State-Lighting Products

July 11, 2007

Author(s)

Yoshihiro Ohno, Carl C. Miller

This paper discusses issues of photometric measurements of solid-state-lighting (SSL) products, for quantities including luminous flux, luminous efficacy...

New Photometer Standards for Low Uncertainty Illuminance Scale Realization

July 11, 2007

Author(s)

George P. Eppeldauer, Carl C. Miller, Yoshihiro Ohno

Improved performance photometers have been developed at the National Institute of Standards and Technology (NIST) to utilize the low spectral responsivity...

Color Rendering

July 11, 2007

Author(s)

Yoshihiro Ohno

LED technologies are advancing at a swift pace and solid-state lighting (SSL) products are already introduced to the market and expected to grow rapidly. There...

Robust Indoor Positioning Based on Received Signal Strength

July 10, 2007

Author(s)

Kamran Sayrafian, Julio Perez

RF-based indoor positioning is a challenging task due to the harsh indoor propagation environment. Techniques based on the received signal strength are simple...

Quantifying Interpretability for Motion Imagery: Applications to Image Chain Analysis

July 9, 2007

Author(s)

Charles D. Fenimore, J Irvine, D Cannon, S Israel, G O'Brien, A Aviles, John W. Roberts

The motion imagery community will benefit from the availability of standard measures for assessing image interpretability. The National Imagery Interpretability...

Verification of an EMC facility retro fit using time domain and field uniformity measurements

July 8, 2007

Author(s)

Dennis G. Camell, Michael Taylor, Robert T. Johnk, Benjamin Davis

This paper summarizes a joint NIST Industry measurement effort. Time domain and field uniformity measurements are used to verify a retro-fit of RF absorber in...

Using nested reverberation chambers to determine the shielding effectiveness of a material

July 8, 2007

Author(s)

Jason B. Coder, John M. Ladbury, Christopher L. Holloway

We examine the current method for determining the shielding effectiveness of a material using nested reverberation chambers and show a simplified approach...

Free Space Antenna Factors through the use of Time-Domain Signal Processing

July 8, 2007

Author(s)

Dennis G. Camell, Robert T. Johnk, David R. Novotny, Chriss A. Grosvenor

This paper demonstrates the usefulness of time domain processing to determine free-space antenna factors,FSAF, for EMC antennas. Procedures are explained and...

Lidar with femtosecond fiber-laser frequency combs

July 8, 2007

Author(s)

Nathan R. Newbury, William C. Swann, Ian R. Coddington

Passively mode-locked fiber lasers produce a broad spectrum of light that is also highly phase-coherent. Such sources have clear potential for remote sensing...

Evaluation of the electromagnetic penetration of the NASA space shuttle endeavour using an ultra wideband measurement system

July 8, 2007

Author(s)

Robert T. Johnk, Robert Scully, David R. Novotny, Chriss A. Grosvenor, Nino Canales, Dennis G. Camell, Galen H. Koepke

This paper summarizes a joint NIST-NASA measurement effort to evaluate the electromagnetic penetration of the shuttle Endeavour. NASA is concerned about the...

Correction of Stray Light In Spectroradiometers and Imaging Instruments

July 4, 2007

Author(s)

Yuqin Zong, Steven W. Brown, Keith R. Lykke, Yoshihiro Ohno

Measurement errors from stray light, spectral or spatial, are inevitable and are often the dominant source of error in spectroradiometers and imaging...

Realization of total spectral radiant flux scale and calibration service at NIST

July 4, 2007

Author(s)

Yuqin Zong, Yoshihiro Ohno

Collaborative Augmented Reality for Better Standards

July 1, 2007

Author(s)

Matthew L. Aronoff, John V. Messina

Concurrent engineering depends on clear communication between all members of the development process. As that communication becomes more and more complex, the...

Air Blast Loading of Cellular Media

July 1, 2007

Author(s)

George A. Gazonas, Joseph Main

Motivated by recent efforts to mitigate blast loading using energy-absorbing materials, this paper investigates the mechanics of uniaxial crushing of cellular...

Interpolation Procedures for Database-Assisted Design

July 1, 2007

Author(s)

Joseph A. Main

Database-assisted design (DAD) is a methodology of designing structures for wind loads that makes direct use of pressure time series from wind tunnel tests...

Towards Standards for Integrated Gaming and Simulation for Incident Management

July 1, 2007

Author(s)

Sanjay Jain, Charles R. McLean, Yung-Tsun T. Lee

Simulation and gaming can support decision making through all phases of incident management including prevention, preparedness, response, recovery and...

A Pilot Implementation of the Core Manufacturing Simulation Data Information Model

July 1, 2007

Author(s)

Yung-Tsun T. Lee, Swee K. Leong, Frank H. Riddick, Marcus Johansson, Bjoern J. Johansson

Interoperability between manufacturing software applications and simulation is currently extremely limited, and it has been recognized that there is a great...

Standards-Based Semantic Middleware

July 1, 2007

Author(s)

Nenad Ivezic, Boonserm Kulvatunyou, Marko Vujasinovic, Pat Snack, Zuran Marjanovic, Hyunbo Cho

We describe a novel semantics-based architecture for standards-based approaches to interoperable applications. The paper includes our experiences in prototyping...

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