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Displaying 47751 - 47775 of 73830

Accurate Dimensional Metrology With Atomic Force Microscopy

June 1, 2000
Author(s)
Ronald G. Dixson, R Koning, Joseph Fu, Theodore V. Vorburger, Thomas B. Renegar
Atomic force microscopes (AFMs) generate three dimensional images with nanometer level resolution and, consequently, are used in the semiconductor industry as tools for sub-micrometer dimensional metrology. Measurements commonly performed with AFMs are

An Architecture and Tool for Large-scale System Control with a manufacturing system application

June 1, 2000
Author(s)
Hui-Min Huang, James S. Albus, William P. Shackleford, Harry A. Scott, Thomas R. Kramer, Elena R. Messina, Frederick M. Proctor
This paper describes a reference architecture that is applicable to multiple classes of large-scale, complex real-time control systems. An associated tool, Generic Shell, is also described. Generic Shell employs a set of code templates that facilitate

An XML Repository Architecture for STEP Modules

June 1, 2000
Author(s)
Joshua Lubell
NIST is developing a web-based repository to serve as the core of a modular environment for developers of STEP, a family of product data exchange standards. Modules are represented in the repository as XML, enabling them to be treated both as documentation

Analysis of Interconnection Networks and Mismatch in the Nose-to-Nose Calibration

June 1, 2000
Author(s)
Donald C. DeGroot, Paul D. Hale, M. Vanden Bossche, F. Verbeyst, Jan Verspecht
We analyze the input networks of the samplers used in the nose-to-nose calibration method. Our model demonstrates that the required input network conditions are satisfied in this method and shows the interconnection errors are limited to measurement

Analysis of Module Interaction in an OMAC Controller

June 1, 2000
Author(s)
John L. Michaloski
Machine controllers built from standardized software parts, commonly referred to as components or modules, have the greatest potential to reap open architecture benefits - including plug-and-play, reusability and extensibility. Modularity is the key to

Bose Condensates in a Harmonic Trap Near the Critical Temperature

June 1, 2000
Author(s)
T Bergeman, D L. Feder, N L. Balazs, B I. Schneider
The mean-field properties of finite-temperature Bose-Einstein gases confined in spherically symmetric harmonic traps are surveyed numerically. The solutions of the Gross-Pitaevskii (GP) and Hartree-Fock-Bogoliubov (HFB) equations for the condensate and low

Characterization of Asymmetric Coupled CMOS Lines

June 1, 2000
Author(s)
Uwe Arz, Dylan F. Williams, Dave K. Walker, J. E. Rogers, M. Rudack, D. Treytner, Hartmut Grabinski
This paper investigates the properties of asymmetric coupled lines built in a 0.25 5m CMOS technology in the frequency range of 50 MHz to 26.5 GHz. We show that the frequency-dependent line parameters extracted from callibrated four-port S-parameter

Comparison of Electrical CD Measurements and Cross-Section Lattice-Plane Counts of Sub-Micrometer Features Replicated in (100) Silicon-on-Insulator Material

June 1, 2000
Author(s)
Michael W. Cresswell, John E. Bonevich, T J. Headley, Richard A. Allen, Lucille A. Giannuzzi, Sarah C. Everist, Rathindra Ghoshtagore, Patrick J. Shea
Test structures of the type known as cross-bridge resistors have been patterned in (100) epitaxial silicon material that was seeded on Bonded and Etched-Back silicon-on-Insulator (BESOI) substrates. The electrical CDs (Critical Dimensions) of a limited

Controller Driven VRML Animation of a Real-Time Inspection System

June 1, 2000
Author(s)
Keith A. Stouffer, John A. Horst
Virtual objects in a web-based environment can be interfaced to and controlled by external real world controllers. A Virtual Reality Modeling Language (VRML) inspection cell was created that models a realtime inspection system The inspection system

Convective and Morphological Instabilities During Crystal Growth

June 1, 2000
Author(s)
Sam R. Coriell, Geoffrey B. McFadden, B T. Murray
We have studied the effects of interface morphology on the dynamics of dendritic growth. The Ivantsov solution for an isothermal paraboloid of revolution growing into a pure, supercooled melt provides a relation between the bulk supercooling and a

Coplanar-Waveguide-to-Microstrip Transition Model

June 1, 2000
Author(s)
Wojciech Wiatr, Dave K. Walker, Dylan Williams
We develop a novel four-port equivalent circuit for a coplanar-waveguide-to-microstrip transition using a finite-difference time-domain analysis. The lumped model accounts for mutual inductive coupling and works well up to about 30 GHz.

Correlation of the optical gap of (Ba,Sr)yTiO 2+y thin films with film composition

June 1, 2000
Author(s)
L D. Rotter, Mark D. Vaudin, John E. Bonevich, Debra L. Kaiser, S 0. Park
A series of (Ba 1-x,Sr x)yTiO 2+y films with a wide range of y and x < 0.07 was grown by metalorganic chemical vapor deposition. The composition of the films was determined by wavelength dispersive x-ray spectrometry. Transmission spectra were measured and

Critical Issues in the Characterization of Polymers for Medical Applications

June 1, 2000
Author(s)
Walter G. McDonough, Eric J. Amis, J Kohn
On June 14, 2000, the New Jersey Center for Biomaterials and the Polymers Division of the National Institute of Standards and Technology (NIST) co-sponsored a one-day workshop on Critical Issues in the Characterization of Polymers for Medical Applications
Displaying 47751 - 47775 of 73830
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