An official website of the United States government
Here’s how you know
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.
In December 1983 the International Organization for Standardization initiated Technical Committee 184 on Industrial Automation Systems. Subcommittee four was...
Past users of octrees have been for representation of static objects. We discuss extensions necessary to model dynamic surfaces. One particularly important...
This paper discusses enhancements made between September 1987 and December 1988 to the preparation software for the Vertical Workstation (VWS) of the Automated...
This paper discusses geometric methods pertaining to planar curves consisting of sequences, straight line segments and arcs of circles joined end to end to make...
A graphical system to experiment with non-periodic tilings of a plane has been developed as part of research supported by the Bureau of Engraving and Printing...
Throughout industrialized countries of the world, companies are using an increasingly larger number of computing systems in all phases of design, analysis...