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Displaying 50601 - 50625 of 74167

Frequency Comparison of 127 I 2 -Stabilized Nd: YAG Laser

April 1, 1999
Author(s)
F L. Hong, K Ishikawa, J Yoda, J Ye, L -. Ma, John L. Hall
A first international comparison of I 2-stabilized Nd: YAG lasers has been made between the National Research Laboratory of Metrology (NRLM), Tsukuba, Japan, the Joint Institute for Laboratory Astrophysics JILA (formerly the Joint Institute for Laboratory

Generation of Different UHMWPE Particle Shape by Wear Through Surface Texturing

April 1, 1999
Author(s)
H. W. Fang, M C. Shen, U Cho, John A. Tesk, A Christou, Stephen M. Hsu
Ultra-high molecular weight polyethylene (UHMWPE) wear particles in replaced joints have been linked to biochemical reactions that eventually lead to loosening of prosthesis. Several studies have shown that UHMWPE produces a wide range of particle sizes

Guest Editorial

April 1, 1999
Author(s)
Barry A. Bell
The National Institute of Standards and Technology hosted the 1998 Conference on Precision Electromagnetic Measurements (CPEM >98) in the Washington Renaissance hotel during the Week of July 6-10, 1998. The Technical Program included 344 papers given in 32

IEEE Trans on Instrumentation - Forward

April 1, 1999
Author(s)
Norman B. Belecki
The National Institute of Standards and Technology hosted the 1998 Conference on Precision Electromagnetic Measurements (CPEM'98) in Washington, D.C. during the week of July 6-10, 1998. Attendance included 506 metrologists, physicists, and engineers from

Imaging of Acoustic Surface Wave Slowness

April 1, 1999
Author(s)
D Xiang, Nelson N. Hsu, Gerald V. Blessing
An experimental method has been devised for imaging the acoustic surface wave slowness (inverse of the phase velocity) in anisotropic solids. This technique utilizes a specially designed broadband, line-focus transducer to sense the leaky surface waves as

Improving Kinematic Touch Trigger Probe Performance

April 1, 1999
Author(s)
Steven D. Phillips, William T. Estler
Kinematic touch trigger probes are widely used on CMMs. This article gives CMM users advice on how to minimize the systematic errors associated with this class of probes.

Instrumental Aspects of X-Ray Microbeams in the Range Above 1 keV

April 1, 1999
Author(s)
P Dhez, P Chevallier, Thomas B. Lucatorto, Charles Tarrio
X rays were discovered by Roentgen in 1895, just over 100 years ago. Early investigations by Roentgen himself indicated that prisms, lenses, and mirrors were seemingly ineffective for deflecting and focusing x rays. However, the magical ability to look

Internet Commerce for Manufacturing Product Data

April 1, 1999
Author(s)
Curtis H. Parks
Printed circuit assemblies (PCA) typically are designed on computer aided design (CAD) systems, checked, then released for manufacture. The released design description typically consists of a top assembly drawing and a series of data files which are used

Modeling of Bare and Aspirated Thermocouples in Compartment Fires

April 1, 1999
Author(s)
L G. Blevins, William M. Pitts
As part of an effort to characterize the uncertainties associated with temperature measurements in fire environments, models of bare bead single-shielded aspirated, and double-shielded aspirated thermocouples were developed and used to study the effects of

Narrow-Line Doppler Cooling of Strontium to the Recoil Limit

April 1, 1999
Author(s)
K R. Vogel, Tim P. Dinneen, Alan Gallagher, J L. Hall
Experimental results on narrow line cooling line cooling of strontium atoms are presented. Doppler cooling is performed on the 1S o- 3P 1 intercombination transition at 689 nm resulting in temperatures near the recoil limit in a one-dimensional (1-D)
Displaying 50601 - 50625 of 74167
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