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Displaying 50551 - 50575 of 74084

On the Geometric and Thermal Errors of a Hexapod Machine Tool

January 1, 1999
Author(s)
Johannes A. Soons
This paper describes the measurement and analysis of the quasi-static errors of a prototype hexapod milling machine located at the National Institute of Standards and Technology (NIST). Emphasis is placed on a) identification of the most important

On the International Temperature Scale of 1990 (ITS-90), Part II: Recommended Techniques for Comparisons, at the Highest Level of Accuracy, of Fixed-Point Cells Used for Contact Thermometry

January 1, 1999
Author(s)
Billy W. Mangum, P Bloembergen, M V. Chattle, B Fellmuth, P Marcarino, A I. Pokhodun
Techniques are recommended for comparisons, at the highest levels of accuracy, of fixed-point cells of the defining fixed points, excluding the vapour-pressure points, of the ITS-90, which are used for contact thermometry. The authors are the members of

Optical Coherence Tomography of Glass Reinforced Polymer Composites

January 1, 1999
Author(s)
Joy Dunkers, Richard~undefined~undefined~undefined~undefined~undefined Parnas, C G. Zimba, R C. Peterson, Kathleen M. Flynn, J G. Fujimoto, B E. Bouma
Optical coherence tomography (OCT) is a non-destructive and non-contact technique to image microstructure within scattering media. The application of OCT to highly scattering materials such as polymer composites is especially challenging. In this work, OCT

Optical Monitoring of Polypropylene Injection Molding

January 1, 1999
Author(s)
C L. Thomas, Anthony J. Bur
We have constructed an optical fiber sensor for monitoring injection molding and we have developed a model to describe sensor behavior. The sensor consists of a sapphire window at the end of a sleeved ejector pin into which an optical fiber is inserted
Displaying 50551 - 50575 of 74084