U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 45176 - 45200 of 74193

X-Ray Tomography of Integrated Circuit Interconnects: Past and Future

November 1, 2001
Author(s)
Zachary H. Levine
An Al-W-silica integrated circuit interconnect sample was thinned to several micro υ and scanned across a 200 nm focal spot of a Fresnel zone plate operating at photon energy of 1573 eV. The experiment was performed on beamline 2-ID-B of the Advanced

Real-Time Operating System Timing Jitter and its Impact on Motor Control

October 29, 2001
Author(s)
Frederick M. Proctor, William P. Shackleford
General-purpose microprocessors are increasingly being used for control applications due to their widespread availability and software support for non-control functions like networking and operator interfaces. Two classes of real-time operating systems

Real-Time Operating System Timing Jitter and its Impact on Motor Control

October 29, 2001
Author(s)
Frederick M. Proctor, William P. Shackleford
General-purpose microprocessors are increasingly being used for control applications due to their widespread availability and software support for non-control functions like networking and operator interfaces. Two classes of real-time operating systems

The TREC Question Answering Track

October 29, 2001
Author(s)
Ellen M. Voorhees
The Text REtrieval Conference (TREC) question answering track is an effort to bring the benefits of large-scale evaluation to bear on a question answering (QA) task. The track has run twice so far, first in TREC-8 and again in TREC-9. In each case the goal

Chapter 19 Shock and Vibration Standards

October 22, 2001
Author(s)
Christopher J. Evans, H C. Pusey
Chapter 19 is concerned with shock and vibration standards covering: terminology; use and calibration of transducers and instrumentation; shock and vibration generators; structures and structural systems; vehicles including land-based, airborne, and ocean

Crossover From First-Order to Critical Wetting: Short-Range Tricritical Wetting

October 22, 2001
Author(s)
David J. Ross, D Bonn, A I. Posazhennikova, J O. Indekeu, J Meunier
We study wetting in liquid mixtures of methanol and the n-alkanes. Mixing alkanes of different chain lengths, we can examine the crossover between critical (continuous) and first-order (discontinuous) wetting transitions. Measurements of the film thickness

Time-Domain Measurement System to Characterize Ultrawideband Emissions

October 21, 2001
Author(s)
Robert T. Johnk, David R. Novotny
This paper summarizes some results of a recent NIST measurement effort. The purpose of this effort was to use a NSIT-developed ultrawideband measurement system to assess the time and frequency-domain characteristics of selected ultrawideband transmitting

Intron and Exons

October 17, 2001
Author(s)
Arlin B. Stoltzfus
An intron (or intervening sequence) is a segment of RNA excised from a gene transcript, with concomitant ligation of flanking segments called exons. Introns of some type are found in every kingdom of cellular life, and also in viruses, bacteriophages and

Surface magnetic phase diagram for a semi-infinite ferromagnet

October 12, 2001
Author(s)
Pavel Kabos, David P. Pappas
The phase diagram for the orientation of the surface region is calculated in the parameter space defined by the surface and bulk anisotropy in semi-infinite ferromagnetic systems and in thin ferromagnet films. Surface magnetic canting always occurs when

Query Expansion Seen Through Return Order of Relevant Documents

October 10, 2001
Author(s)
Walter S. Liggett Jr
There is a reservoir of knowledge in data from the TREC evaluations that analysis of precision and recall leaves untapped. This knowledge leads to better understanding of query expansion as this paper demonstrates. In many TREC tasks, the system response

Government Activity to Increase Benefits from the Global Standards System

October 3, 2001
Author(s)
Roger Marks, Robert E. Hebner
The economic development of the Twentieth Century was accompanied and enhanced by the increasing use of documentary standards, largely developed by industry. In the current environment, companies and nations in global competition adopt various strategies

A Classical Kinetic Theory Approach to Lattice Boltzmann Simulation

October 1, 2001
Author(s)
Nicos Martys
An approach to lattice Boltzmann simulation is described, which makes a direct connection between classical kinetic theory and contemporary lattice Boltzmann modeling methods. This approach can lead to greater accuracy, improved numerical stability and
Displaying 45176 - 45200 of 74193
Was this page helpful?