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NIST Authors in Bold

Displaying 51476 - 51500 of 73697

Cryptography Standards and Infrastructures for the Twenty-First Century

September 17, 1998
Author(s)
Shirley M. Radack
This bulletin reports on the progress being made by NIST and by its government and industry partners to advance the development of electronic commerce systems in which users will have confidence. There are efforts underway to update existing standards for

Path Planning for Autonomous Vehicles Driving Over Rough Terrain

September 17, 1998
Author(s)
Alberto Lacaze, Yigal Moscovitz, Nicholas DeClaris, Karl Murphy
This paper presents a multiresolutional architec- ture of planners for obstacle avoidance in outdoor mobility. The planner makes use of o -line dynam- ical simulations results to eciently nd paths that avoid obstacles. The trajectories are generated by set

The Growth Kinetics of Nanocrystalline ZnO Colloidal Solutions

September 11, 1998
Author(s)
E M. Wong, John E. Bonevich, P C. Searson
Colloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. Although the synthesis and unique properties of these materials are well known, the kinetics of the growth process are not well understood. The particle

A Brief History of Early Product Data Exchange Standards

September 1, 1998
Author(s)
Barbara L. Goldstein, Sharon J. Kemmerer, Curtis H. Parks
The following paper traces the history of product data exchange standards from the physical model through electronic representations such as IGES. This paper provides an understanding of the early efforts leading to ISO 10303--Standard for the Exchange of

A New Method of Certifying Standardized Rockwell Hardness Test Blocks

September 1, 1998
Author(s)
Samuel R. Low III, Walter S. Liggett Jr, David J. Pitchure
Rockwell hardness test blocks, whether standardized at the primary national laboratory level or by secondary commercial laboratories, have been certified historically by determining an average hardness value for the test surface of the block. However

A Strain-Based Methodology for High Temperature Lifetime Prediction

September 1, 1998
Author(s)
Sheldon M. Wiederhorn, William E. Luecke, Ralph Krause
In structural materials, lifetime is often strain-determined. Once a part exceeds its allowable strain, its functional integrity is lost. Although most ceramics are designed to a brittle failure criterion, silicon nitride at the temperatures expected in

Accuracy Differences Among Photomask Metrology Tools--and Why They Matter

September 1, 1998
Author(s)
James E. Potzick
A variety of different kinds of photomask critical dimension (CD) metrology tools are available today to help meet current and future metrology challenges. These tools are based on different operating principles, and have differing cost, throughput

Acid-Assisted Consolidation of Silver Alloys for Direct Fillings

September 1, 1998
Author(s)
F Eichmiller, Kathleen M. Hoffman, A A. Guiseppetti, M M. Wray, R J. Avers
Silver-rich metal powders cold-welded by consolidation have been investigated as possible direct dental filling material. The surface of the silver powder must undergo an acid treatment to remove existing contaminants and prevent formation of new surface
Displaying 51476 - 51500 of 73697
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