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Conferences

Architecture and Implementation of a Design Repository System

September 1, 2002

Author(s)

Simon Szykman

This paper describes the design and development of a design repository software system. This system is a prototype implementation intended to demonstrate the...

Tolerancing Form Deviations for Rockwell Diamond Indenters

September 1, 2002

Author(s)

Jun-Feng Song, Samuel R. Low III, Li Ma

The spherical tip of Rockwell diamond indenters tends to be manufactured either a flat- or sharp-shaped surface because of the anisotropy property of the...

Knowledge Engineering for Real-Time Intelligent Control

September 1, 2002

Author(s)

John Evans, Elena R. Messina, James S. Albus, Craig I. Schlenoff

The key to real-time intelligent control lies in the knowledge models that the system contains. Three main classes of knowledge are identified: parametric...

Visualizing the Limitations of Four-State Measurement of PDL and Results of a Six-State Alternative

September 1, 2002

Author(s)

Rex M. Craig

Author presents a method of visualizing polarization-dependent loss in single-mode optical fiber and components. This method uses generalized Poincarei...

Measurement and mitigation of multiple reflection effects on the Differential Group Delay spectrum of optical components

September 1, 2002

Author(s)

Paul A. Williams, Jonathan D. Kofler

Ripple in the Differential Group Delay (DGD) spectrum due to multiple reflections is described theoretically and demonstrated experimentally. A technique of...

U.S. Government Use of Conformity Assessment

September 1, 2002

Author(s)

Belinda L. Collins

U.S. Federal Agencies use multiple approaches to both laboratory accreditation and conformity assessment programs, as they carry out their regulatory and...

Water Closet Extraction Test Acceptance Criteria-Missing Links

September 1, 2002

Author(s)

L S. Galowin, T M. Kenney

Performance data for water closet (WC) extraction laboratory evaluation methods applied for acceptable pass/fail criteria with mixed media waste solids is...

Compact Force Sensors for Low-Force Mechanical Probe Calibration

September 1, 2002

Author(s)

Jon R. Pratt, Douglas T. Smith, S Woody

The loading mechanisms of instrumented indentation machines are often calibrated using deadweights. In many cases, due to the geometry of the loading frame, the...

Noise Temperature for Nb DHEB Mixer Receiver for Far-Infrared Spectroscopy

September 1, 2002

Author(s)

Eyal Gerecht, Carl D. Reintsema, Erich N. Grossman, A. L. Betz, R. T. Boreiko

We are reporting a noise temperature measured on a diffusion-cooled hot electron bolometeric (DHEB) mixer designed for a heterodyne focal plane array to study...

NbN Film Development for PHEB Devices

September 1, 2002

Author(s)

Eyal Gerecht, V. A. Bhupathiraju, Erich N. Grossman, Jeffrey W. Nicholson, Fernando Rodriguez-Morales, Dazhen Gu, Sigfrid Yngvesson

We have developed a process for fabricating a thin NbN film at the National Institute of Standards and Technology in Boulder, CO. A two-fold approach can be...

Kinetic Minimum-Power Routing and Clustering in Mobile Ad-Hoc Networks

September 1, 2002

Author(s)

Camillo Gentile, R E. Van Dyck, J Haerri

We have previously developed a distributed routing algorithm which minimizes the number of overhead messages necessary to maintain the minimum-power multi-hop...

Effects of Wafer Emissivity on Rapid Thermal Processing Temperature Measurement

September 1, 2002

Author(s)

D H. Chen, D P. DeWitt, Benjamin K. Tsai, Kenneth G. Kreider, William A. Kimes

Lightpipe radiation thermometers (LPRTs) are widely used to measure wafer temperatures in rapid thermal processing (RTP) tools. Using blackbody-calibrated LPRTs...

Preliminary Design and Manufacturing Planning Integration Using Intelligent Agents

September 1, 2002

Author(s)

Shaw C. Feng, Eugene Song

Intelligent agents can enable the integration of preliminary design with manufacturing planning software systems. These agents execute in a computer-based...

NIST RM (Reference Material) 8240/8250 Standard Bullets and Casings Project

September 1, 2002

Author(s)

Jun-Feng Song, Theodore V. Vorburger, Susan M. Ballou, M Ols

The NIST RM (Reference Material) 8240/8250 Standard Bullets and Casings Project aims to support the National Integrated Ballistics Information Network (NIBIN)...

Comparison of Stimulated and Spontaneous Scattering Measurements of the Full Wavelength Dependence of the Raman Gain Spectrum

September 1, 2002

Author(s)

Nathan R. Newbury, Kristan L. Corwin

We present a direct comparison of the measured spontaneous Raman spectra and the measured stimulated Raman gain from a pump laser. We confirm that the...

Four-state measurement method for polarization dependent wavelength shift

September 1, 2002

Author(s)

William C. Swann, Shellee D. Dyer, Rex M. Craig

We present a novel four-state method for measuring the polarization dependent wavelength shift (PDW) of a fiber Bragg grating. We show that measurement of the...

Accuracy of AlGaAs Rates and Composition Determination Using RHEED Oscillations

September 1, 2002

Author(s)

Todd E. Harvey, Kristine A. Bertness, Chih-Ming Wang, Jolene Splett

Reflection high-energy electron diffraction (RHEED) oscillations are widely used in molecular beam epitaxy (MBE) as a technique to calibrate material growth...

High-resolution Group Delay Measurements of a Hydrogen Cyanide Gas Cell Using Low-coherence Interferometry

September 1, 2002

Author(s)

Shellee D. Dyer, Robert J. Espejo, Paul A. Williams

We demonstrate interferometric measurements of the relative group delay of a hydrogen cyanide gas cell with group-delay resolution of 0.3 ps at a wavelength...

Effects of Noise Level in Fitting In-Situ Optical Reflectance Spectroscopy Data

September 1, 2002

Author(s)

Chih-chiang Fu, Kristine A. Bertness, Chih-Ming Wang

We discuss the combination of noise level and scaling factor accuracy needed in optical reflectance spectroscopy data in order to obtain accurate parameters by...

Micro-Mirror Array Control of Optical Tweezer Trapping Beams

August 28, 2002

Author(s)

Nicholas Dagalakis, Thomas W. LeBrun, J Lippiatt

The efficiency of optical tweezer manufacturing depends on the number of trapping beams available. Micro optics technology offers the opportunity to...

Shielding Effectiveness Measurements Using the Direct Illumination Technique

August 20, 2002

Author(s)

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

In this paper we discuss the direct illumination and reverberation chamber techniques for measuring shielding effectiveness. using the reverberation chamber as...

A Discussion of Losses and Changes in the Characteristic Impedance of Finitely-Conducting Planar Transmission Line Structures

August 19, 2002

Author(s)

Christopher L. Holloway

This paper discusses the effects that finite conductors have on the propagation characteristics of planar transmission lines structures. Closed form expressions...

Measurement and Simulation of a Semi-anechoic Room Using Field Mapping as an Indication of Chamber Quality

August 19, 2002

Author(s)

Donna Beals, Christopher L. Holloway, Paul McKenna

In this paper we discuss the use of a field mapping approach for determining chamber quality. Both measurements and simulation results are used to illustrate...

Coupling to Devices in Electrically Large Cavities, or Why Classical EMC Evaluation Techniques are Becoming Obsolete

August 19, 2002

Author(s)

John M. Ladbury, T. H. Lehman, Galen H. Koepke

We show that the coupling between a sensor in an electrically large cavity and the outside world is a very complicated problem, with small changes inside the...

Pseudo-Isotropic Source for Anechoic Chamber Qualification

August 19, 2002

Author(s)

Perry F. Wilson, John M. Ladbury, Galen H. Koepke

A pseudo-isotropic source is presented. The source consists of an electrically-large cavity with internal excitation (horn antenna), a variable internal...

Comparison of Planar versus Spherical Emission Meausrements for Unintentional Emitters

August 19, 2002

Author(s)

Perry F. Wilson, Marco Candidi, Christopher L. Holloway

The emission patterns from electrically large objects are complex and require time consuming spherical scans to determine the emissions maximum. A planar cut...

Real-Time Studies of Strains at Ferroelectric Domain Walls under an Applied Field

August 17, 2002

Author(s)

Terrence J. Jach, S. Kim, S M. Durbin, J. A. Aust, David S. Bright

We report on an improved method of visualizing domains in congruent ferroelectric crystals such as LiNbO^d3 with Bragg x-ray topography. Using monochromatic...

Developing Frequency-Domain Models for Nonlinear Circuits Based on Large-Signal Measurements

August 17, 2002

Author(s)

Jeffrey Jargon, Kuldip Gupta, Dominique Schreurs, Donald C. DeGroot

Phantom Materials for Metal Detector Research

August 17, 2002

Author(s)

James R. Baker-Jarvis, Raian K. Kaiser, Michael D. Janezic

The purpose of this paper is to discuss the characterization of materials that mimic the electromagnetic characteristics of the human body from low frequencies...

Remote, Near-Field Measurement of Large Antennas

August 17, 2002

Author(s)

Ronald C. Wittmann, Michael H. Francis

It is difficult to characterize many antenna systems in a laboratory environment. Size is the major consideration, but an increasing number of sophisticated...

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