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Conferences

NIST-SFPE Workshop for Development of a National R&D Roadmap for Structural Fire Safety Design and Retrofit of Structures: Proceedings.

December 1, 2003

Author(s)

K H. Almand, Long Phan, Therese P. McAllister, M A. Starnes, John L. Gross

Angle Metrology Using AAMACS and Two Small-Angle Measurement Systems

November 28, 2003

Author(s)

Jack A. Stone Jr., M Amer, Bryon S. Faust, Jay H. Zimmerman

The highest accuracy method for angle measurement employed at NIST(National Institute of Standards and Technology) makes use of an automated stack of three...

Modeling and Distrubance Rejection Control of a Nanopositioner with Application to Beam Steering

November 21, 2003

Author(s)

Jason J. Gorman, Nicholas Dagalakis

This paper discusses the modeling and control of a nanopositioning flexure hinge mechanism with a piezoelectric actuator. A complete dynamic model for the...

Force Control of Linear Motor Stages for Microassembly

November 21, 2003

Author(s)

Jason J. Gorman, Nicholas Dagalakis

The microassembly of microelectromechanical systems from various micro-components requires the development of many new robotic capabilities. One of these...

Wavelength-Tracking Capabilities of a Fabry-Perot Cavity

November 20, 2003

Author(s)

Jack A. Stone Jr., Alois Stejskal

We have characterized the accuracy of atmospheric wavelength tracking based on a laser servolocked to a simple Fabry-Peron cavity. The motivations are (1) to...

Speed of Sound and Other Related Thermodynamic Properties Calculated From the AGA8 Detail Characterization Method

November 19, 2003

Author(s)

Eric W. Lemmon, K. E. Starling

The AGA8 Detail Characterization Method allows for the calculation of the compressibility factor (or pressure) for a natural gas mixture given known conditions...

Neighborhood-Scale Fire Spread

November 16, 2003

Author(s)

Ronald G. Rehm, D. D. Evans, William E. Mell, Simo A. Hostikka, Kevin B. McGrattan, Glenn P. Forney, Charles E. Bouldin, Elisa S. Baker

This paper describes development of a physics-based mathematical and computational model to predict fire spread among structures and natural fuels (trees...

Time-Domain Measurements of Radiated and Conducted Ultrawideband Emissions

November 16, 2003

Author(s)

Robert T. Johnk, David R. Novotny, Chriss A. Grosvenor, Seturnino Canales, Jason Veneman

This paper summarizes results obtained from time-domain full-bandwidth emissions measurements of selected ultrawideband (UWB) transmitting devices. Brief...

Calibration of Piezoresistive Cantilever Force Sensors Using the NIST Electrostatic Force Balance

November 16, 2003

Author(s)

Jon R. Pratt, David B. Newell, John A. Kramar, Eric P. Whitenton

The characterization of material properties and mechanical performance of micro-electromechanical devices often hinges on the accurate measurement of small...

Advances in Radiometry for Ocean Color

November 10, 2003

Author(s)

Steven W. Brown, D K. Clark, Bettye C. Johnson, Howard W. Yoon, Keith R. Lykke, S Flora, M Feinholz, N Souaidia, C Pietras, Thomas C. Stone, M Yarbrough, Y S. Kim, R Barnes, J Mueller

Organic materials in the oceans have spectral signatures based on their light-scattering properties. These optical properties are related to bio-physical and...

The Advanced Angle Metrology System at NIST

November 1, 2003

Author(s)

Jack A. Stone Jr.

At the National Institute of Standards and Technology, our best capability for angle measurement is our Advanced Automated Master Angle Calibration System...

Multimodal Biometrics: Issues in Design and Testing

November 1, 2003

Author(s)

Robert D. Snelick, Michael D. Indovina, James H. Yen, Alan Mink

The results of experimental studies on multimodal biometric systems for small-scale populations have shown better performance compared to single-mode biometric...

Understanding Self-Healing in Service-Discovery Systems

November 1, 2003

Author(s)

Christopher E. Dabrowski, Kevin L. Mills

Service-discovery systems aim to provide consistent views of distributed components under varying network conditions. To achieve this aim, designers rely upon a...

Nature s Packaging: Using Bio-Inspired Liposomes for Rapid, High Efficiency Mixing in Microfluidic Systems

November 1, 2003

Author(s)

Wyatt N. Vreeland, Laurie E. Locascio

Manipulating Self-Assembled Nanotubes

November 1, 2003

Author(s)

K P. Brazhnik, Wyatt N. Vreeland, P B. Howell, Rani Kishore, J Wells, Kristian Helmerson, Laurie E. Locascio

First-Principles Calculations of the Dielectric Properties of Perovskite-Type Materials

November 1, 2003

Author(s)

Eric J. Cockayne

We compare first-principles (FP) calculations of the ionic effective charges, phonon frequencies, and static dielectric permittivities k s of several perovskite...

Premixed Calcium Phosphate Cement Pastes

November 1, 2003

Author(s)

Shozo Takagi, Laurence C. Chow, S Hirayama, A Sugawara

A self-hardening calcium phosphate cement (CPC-I), consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA), has been shown in...

Specular Baffle for Improved Infrared Integrating Sphere Performance.

November 1, 2003

Author(s)

Leonard M. Hanssen, A Prokhorov, V B. Khromchenko

Baffles are often placed in integrating spheres to accommodate the non-ideal aspects of other sphere components. These include detectors, sources, sphere wall...

Preliminary Results of Aperture-Area Comparison for Exo-Atmospheric Solar Irradiance

November 1, 2003

Author(s)

Bettye C. Johnson, Maritoni A. Litorja, James J. Butler

Exo-atmospheric

Characterizing Surface Roughness of Thin Films by Polarized Light Scattering

November 1, 2003

Author(s)

Thomas A. Germer, Michael J. Fasolka

The polarization of light scattered by the surface of a material contains information that can be used to identify the sources of that scatter. In this paper...

Comparison of Laser-Based and Conventional Calibrations of Sun Photometers

November 1, 2003

Author(s)

N Souaidia, C Pietras, G Fargion, R Barnes, R Frouin, Keith R. Lykke, Bettye C. Johnson, Steven W. Brown

Sun photometers are used to characterize the radiative properties of the atmosphere. They measure both the incident solar irradiance as well as the sky radiance...

Calibration and Characterization of Trap Detector Filter Radiometers

November 1, 2003

Author(s)

David W. Allen, George P. Eppeldauer, Steven W. Brown, E A. Early, Bettye C. Johnson, Keith R. Lykke

We describe the development of a mechanically simple, radiometrically stable transfer radiometer designed for both radiance and irradiance measurements. The...

Optical Photomask CD Metrology at NIST

November 1, 2003

Author(s)

James E. Potzick

Our customers usually measure mask features in order to make a business decision, such as whether or not to ship a mask to a customer. A simple cost/benefit...

Measurements of Large Silicon Spheres Using the NIST M48 Coordinate Measuring Machine

November 1, 2003

Author(s)

John R. Stoup, Theodore D. Doiron

The NIST M48 coordinate measuring machine (CMM) was used to measure the average diameter of two precision, silicon spheres of nominal diameter near 93.6 mm. A...

Modeling and Disturbance Rejection Control of a Nanopositioner with Application to Beam Steering

November 1, 2003

Author(s)

Jason J. Gorman, Nicholas Dagalakis

This paper discusses the modeling and control of a nanopositioning flexure hinge mechanism with a piezoelectric actuator. A complete dynamic model for the...

Comparison of Analytical and Numerical Simulations for Variable Spindle Speed Turning

November 1, 2003

Author(s)

T Insperger, Timothy J. Burns, T L. Schmitz, G Stepan

The turning process with varying spindle speed is investigated. The well-known turning model is presented and the governing delay-differential equation with...

High Frequency Loss Mechanism in Polymers Filled With Dielectric Modifiers

November 1, 2003

Author(s)

Jan Obrzut, A Anopchenko, K Kano, Haonan Wang

We analyzed the high frequency dielectric relaxation mechanism in high-k composite materials using film substrates made of low loss organic resin filled with...

Analytical Evaluation and Correction of Port Loss Error in Integrating Sphere Reflectometers

November 1, 2003

Author(s)

A Prokhorov, Sergey Mekhontsev, Leonard Hanssen

Incomplete hemispherical irradiation of the sample (or collection of radiation, in the reverse geometry) in an integrating sphere reflectometer is unavoidable...

NIST XML Simulation Interface Specification at Boeing: A Case Study

November 1, 2003

Author(s)

R F. Lu, Guixiu Qiao, Frank H. Riddick, Charles R. McLean

Efficient and consistent simulation data management is indispensable and a challenging problem to be solved in modeling manufacturing and business processes. An...

Test Arenas and Performance Metrics for Urban Search and Rescue Robots

October 31, 2003

Author(s)

Adam S. Jacoff, Elena R. Messina, Brian Weiss, S Tadokoro, Y Nakagawa

In this paper, we discuss the development and proliferation of robot test arenas that provide tangible, realistic, and challenging environments for mobile robot...

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