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Displaying 54201 - 54225 of 74453

Representations and Methodologies for Assembly Modeling

November 1, 1997
Author(s)
Kevin W. Lyons, Venkat Rajan, Raj Sreerangam
Most products are assemblies of components. The number of components can range from a few tens to a few millions. Design of electro-mechanical assemblies involves the description of the constraints between a group of parts that allows them to behave in the

Seventh International Conference on Computer Technology in Welding

November 1, 1997
Author(s)
Thomas A. Siewert
This report reviews the worldwide growth and trends in welding software over the past 10 years. It discusses these trends in terms of the changes in computer resources (rapid acceptance of the personal computer and advances in operating systems) as well as

Uncertainty and Dimensional Calibrations

November 1, 1997
Author(s)
Theodore D. Doiron, John R. Stoup
The calculation of uncertainty for a measurement is an effort to set reasonable bounds for the measurement result according to standardized rules. Since every measurement produces only an estimate of the answer, the primary requisite of an uncertainty

Concrete Mixture Optimization Using Statistical Mixture Design Methods.

October 22, 1997
Author(s)
E S. Lagergren, Kenneth A. Snyder, M J. Simon
The optimization of mixture proportions for high-performance concretes, which contain many constituents and are often subject to several performance constraints, can be a difficult and time-consuming task. Statistical experiment design and analysis methods

Role Based Access Control for the World Wide Web

October 10, 1997
Author(s)
John Barkley, Anthony V. Cincotta, David F. Ferraiolo, Serban I. Gavrila, David R. Kuhn
One of the most challenging problems in managing large networked systems is the complexity of security administration. This is particularly true for organizations that AWeb (WWW) servers. Today, security administration is costly and prone to error because

Field Testing Hopper Scales

October 6, 1997
Author(s)
R C. Suiter
The testing of hopper scales seems to be intimidating to many field inspectors. They dread the task of doing a substitution test or a strain load test; there is often confusion about the difference between the two types of tests, how the error is

On the Fast Track: New Usability Testing Methods for Web Sites

October 2, 1997
Author(s)
Jean C. Scholtz, L L. Downey
The dynamic nature of the Web poses problems for usability evaluations. Development times are rapid, changes to Web sites occur frequently, often without reevaluating the usability of the entire site, and new advances in Web developments change user

The Critical Evaluation of Transition Probabilities of Na-Ca (Z=11 to 20)

October 2, 1997
Author(s)
Daniel E. Kelleher, Larissa Podobedova
We provide a progress report on the critical evaluation of transition probabilities for Na to Ca (Z-11-20), which are to replace the 30 year old NIST/AIP/ACS publication (Journal of Physical and Chemical Reference Data Monograph 7) on this material
Displaying 54201 - 54225 of 74453
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