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Displaying 16101 - 16125 of 17290

Design and Evaluation of A Simple Ultralow Vibration Vacuum Environment

January 1, 2001
Author(s)
John R. Lawall, Ernest G. Kessler
A vibration-isolated platform in a high-vacuum environment designed for prototyping optical interferometers is described. The system provides isolation from both seismic and acoustic disturbances with a residual acceleration of 2.9 x 10 -6 m/s 2 rms (root

Tomography of Integrated Circuit Interconnect With an Electromigration Void

May 1, 2000
Author(s)
Zachary H. Levine, A R. Kalukin, M Kuhn, S P. Frigo, I McNulty, C C. Retsch, Y Wang, Uwe Arp, Thomas B. Lucatorto, Bruce D. Ravel, Charles S. Tarrio
An integrated circuit interconnect was subject to accelerated-life conditions to induce an electromigration void. The silicon substrate was removed, leaving only the interconnect encased test structure encased in silica. We imaged the sample with 1750 eV

Security and Confidence in IT Products

April 1, 2000
Author(s)
E Roback
Federal organizations need to have an appropriate level of confidence that the security features of IT products work as intended and meet security specifications. The basis for having such confidence is through security assurance. Products with an

Calibrations of Colorimeters for Display Measurements: Some Commercial Colorimeters Have Uncertainties in Display-Color Measurements That Are Too Large for Many Commercial, Industrial and Military Applications - But New NIST-Developed Calibration Proc...

December 1, 1999
Author(s)
Steven W. Brown, Yuqin Zong, Yoshihiro Ohno
Commercial color measuring instruments (colorimeters and spectroradiometers) are currently used in a number of product development and control environments, as well as for product acceptance testing and a variety of other applications. In many cases, the

Empirical Modeling of Electromagnetic Accoustic Transducer Data

August 1, 1999
Author(s)
Kevin J. Coakley, A V. Clark, C S. Hehman
We characterize the observed phase and amplitude of acoustic birefringence data collected with an electromagnetic acoustic transducer (EMAT). Our characterization models are extended versions of an idealized model for acoustic birefringence. In the

Capillary Electrophoretic Determination of Oxalate in Amniotic Fluid

April 20, 1999
Author(s)
B C. Nelson, G F. Rockwell, T Campfield, P O'Grady, R M. Hernandez, Stephen Wise
A capillary electrophoretic (CE) assay for oxalate has been applied to the quantitative determination of free oxalate in amniotic fluid. Indirect absorbance detection of oxalate is accomplished with a chromate-based background electrolyte modified with

Primary Acoustic Thermometry From 217 K to 303 K

April 1, 1999
Author(s)
Michael R. Moldover, S J. Boyes, A R. Goodwin, Christopher W. Meyer
We report new values for the difference (T T 90) between Kelvin thermodynamic temperatures T and ITS-90, the International Temperature Scale of 1990. The new data span the range 217 K {less then or equal to} T 303 K with standard uncertainties of 0.6 mK. A

Wavelengths and Oscillator Strengths for Space Astronomy

April 1, 1998
Author(s)
Craig J. Sansonetti, Joseph Reader
Over a period of more than a decade the Atomic Spectroscopy Group at NIST has carried out laboratory research to support the observing program of the Hubble Space Telescope (HST). Our Initial effort concerned the wavelength calibration of GHRS by means of

Thin-Film Ellipsometry Metrology

March 1, 1998
Author(s)
P. Durgapal, James R. Ehrstein, Nhan Van Nguyen
A wide variety of commercial ellipsometers are available in the market today. They all measure the change in the state of polarization of light on reflection, but the techniques adopted vary from instrument to instrument. Further, the models used to

Compartment Fire Near-Field Entrainment Measurements.

January 1, 1995
Author(s)
N A. Dembsey, P J. Pagni, R B. Williamson
A widely accepted consensus on entrainment models for large fires in compartments does not yet exist. To obtain further information on such entrainment rates, 20 full-scale, near-field experiments were conducted. Near-field entrainment occurs when hot
Displaying 16101 - 16125 of 17290
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