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Displaying 45801 - 45825 of 74141

Report on Forum 2000: Fluid Properties for New Technologies - Connecting Virtual Design with Physical Reality

May 14, 2001
Author(s)
James C. Rainwater, Daniel G. Friend, Howard J. Hanley, Allan H. Harvey, C D. Holcomb, Arno D. Laesecke, Joe W. Magee, Chris D. Muzny
Forum 2000, which addressed the present needs and priorities for thermophysical properties measurements, was held June 29, 2000, at the 14th Symposium for Thermophysical Properties in Boulder, Colorado. Seven distinguished experts presented overviews of

Challenges of High-[kappa] Gate Dielectrics for Future MOS Devices

May 13, 2001
Author(s)
John S. Suehle, Eric M. Vogel, Monica D. Edelstein, Curt A. Richter, Nhan Van Nguyen, Igor Levin, Debra Kaiser, Hanchang F. Wu, J B. Bernstein
As the feature sizes of complementary metal-oxide-semiconductor (CMOS) devices are scaled downward, the gate dielectric thickness must also decrease to maintain a value of capacitance to reduce short-channel effects and to keep device drive current at an

Compressive Strengthening of Sapphire by Neutron Irradiation

May 9, 2001
Author(s)
T M. Regan, D C. Harris, R M. Stroud, J R. White, D W. Blodgett, K C. Baldwin, J A. Miragliotta, M E. Thomas, M J. Linevsky, J W. Giles, T A. Kennedy, M Fatemi, David R. Black
Neutron irradiation of sapphire with 1 1022(=1 MeV)/m2 increases the c-axis compressive strength by a factor of 3 at 600 C. The mechanism of strength enhancement is the retardation of r-plane twin propagation by radiation-induced defects. 10B and Cd

AC and DC Voltages From a Josephson Arbitrary Waveform Synthesizer

May 7, 2001
Author(s)
Samuel P. Benz, Charles J. Burroughs, Paul D. Dresselhaus, Laurie Christian
We have synthesized and measured ac and dc voltages using a Josephson arbitrary waveform synthesizer. On-chip filtering has enabled the first practical operating margins for ac and arbitrary waveforms. Using a digital voltmeter, we demonstrate the

Use of the Oscillation Based Built-in Self-test Method for Smart Sensor Devices

May 7, 2001
Author(s)
Angela Hodge, R. Newcomb, Allen R. Hefner Jr.
An oscillation-based built in self-test (BIST) method is presented for functional testing of mixed signal devices. An integral component of this method of on-chip testing involves transforming an oscillating analog signal into a digital clock-like signal

A Method to Compare Vector Nonlinear Network Analyzers

May 1, 2001
Author(s)
Kate Remley, Donald C. DeGroot, Jeffrey Jargon, Kuldip Gupta
We address the difficult problem of determining measurement consistency between two vector nonlinear network analyzers, a new class of stimulus-response instruments that acquire multiharmonic waveform data instead of normalized network parameters. We

A New Stable Speed Test Apparatus for Milling

May 1, 2001
Author(s)
J P. Snyder, Jon R. Pratt, Matthew A. Davies, S J. Smith
This paper describes a new device that uses a non-contact force actuator in conjunction with spindle rotation to produce an impulsive periodic driving force on the tool at the tooth passing frequency. Measurements are made of the applied and of the

A Phase-Field Model With Convection: Sharp-Interface Asymptotics

May 1, 2001
Author(s)
D M. Anderson, Geoffrey B. McFadden, A A. Wheeler
We have previously developed a phase-field model of solidification that includes convection in the melt. This model represents the two phases as viscous liquids, where the putative solid phase has a viscosity much larger than the liquid phase. The object

A Preliminary Information Model for a Supply Chain Simulation

May 1, 2001
Author(s)
Shigeki Umeda, Charles R. McLean, Yung-Tsun T. Lee
This paper provides an overview of the information model that is under development for the simulation of a manufacturing supply chain. The supply chain simulation is being developed to validate interface specifications as part of the Intelligent

Analysis of Stresses in Aluminum-Silicon Alloys

May 1, 2001
Author(s)
A Saigal, Lin-Sien H. Lum
Two-phase aluminum-silicon-based alloys are widely used for premium quality castings for aerospace and automotive applications. While it is clear that silicon improves fluidity in the molten state, providing excellent castability to the alloy, and

BFRL Publications, 2000, Volumes 1 and 2

May 1, 2001
Author(s)
Star R. Burgess, Glenn P. Forney, Nora H. Jason
BFRL Publications, 2000, contains publications produced by or for BFRL staff during 2000. Volume 1 contains Building Research Publications and Volume 2 contains Fire Research publications. We also have included software for solving problems related to

Biometrics - Technologies for Highly Secure Personal Authentication

May 1, 2001
Author(s)
Fernando L. Podio
Biometrics are automated methods of recognizing a person based on a physiological or behavioral characteristic. Biometric technologies are becoming the foundation of an extensive array of highly secure identification and personal verification solutions

Calibrating Electro-Optic Sampling Systems

May 1, 2001
Author(s)
Dylan Williams, Paul D. Hale, Tracy S. Clement, Juanita M. Morgan
We apply frequency-domain impedance mismatch corrections to a temporal electro-optic sampling system. We identify and evaluate additional sources of measurement uncertainty. We use the system to characterize the magnitude and phase response of a

Calibration of Thin Heat Flux Sensors for Building Applications Using ASTM C 1130

May 1, 2001
Author(s)
Robert R. Zarr, V Martinez-Fuentes, James J. Filliben, Brian P. Dougherty
Calibration measurements of thin heat flux sensors for building applications are presented. The findings support the continued development of precision and bias statements for ASTM Practice C 1130. Measurements have been conducted using a 1016 mm diameter

Chemical Mapping of Patterned Polymer Photoresists by Near-Field Infrared Microscopy

May 1, 2001
Author(s)
B Dragnea, J Preusser, J Szarko, L A. McDonough, S R. Leone, W D. Hinsberg
Latent images obtained by deep-ultraviolet (DUV) patterning and post-exposure bake in the polymer system poly(t-butylmethacrylate) resist/triphenyl sulfonium photoacid generator are characterized by infrared near-field microscopy (IR-NSOM). Chemical sub

Comparison of Some Algorithms to Estimate the Low and High State Level of Pulses

May 1, 2001
Author(s)
O. M. Solomon, Donald R. Larson, Nicholas Paulter
The IEEE Subcommittee on Pulse Techniques (SCOPT) of the Instrument and Measurement Society is developing a new standard for pulse analysis which yields pulse parameters such as amplitude, transition duration, overshoot, undershoot, pulse duration, and
Displaying 45801 - 45825 of 74141
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