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Search Publications

NIST Authors in Bold

Displaying 43526 - 43550 of 73697

Studies of Intensity Noise at Synchrotron Ultraviolet Radiation Facility III

March 1, 2002
Author(s)
Uwe Arp, Thomas B. Lucatorto, K Harkay, K Kim
Suppression of beam instabilities has become an important goal at synchrotron radiation light sources, where highly sensitive applications like metrology, Fourier--transform spectroscopy and microscopy are now in use. We describe measurements connecting

Subfemtosecond Timing Jitter Between Two Independent, Actively Synchronized Mode-Locked Lasers

March 1, 2002
Author(s)
R K. Shelton, S M. Foreman, L -. Ma, John L. Hall, H C. Kapteyn, M M. Murnane, M Notcutt, Jun Ye
With the implementation of a bandwidth servo, along with improved laser construction and associated better passive stability, we have achieved sub-femtosecond relative timing jitter between two independent, actively synchronized, mode-locked Ti-sapphire

Surfactant-Assisted Atomic-Level Engineering of Spin Valves

March 1, 2002
Author(s)
H D. Chopra, D X. Yang, P J. Chen, William F. Egelhoff Jr.
Surfactant Ag was successfully used to atomically engineer interfaces and nanostructure in NiO-Co-Cu based bottom spin valves. DC magnetron sputtered Co (3.0nm)/Cu (1.5 nm)/Co (2.5 nm)/NiO (50nm) bottom spin valves were studied with and without Ag as a

Synchrotron Ultraviolet Radiation Facility SURF III

March 1, 2002
Author(s)
Uwe Arp, Charles W. Clark, Alex P. Farrell, E Fein, Mitchell L. Furst, Edward W. Hagley
The National Institute of Standards and Technology (NIST) has operated the Synchrotron Ultraviolet Radiation Facility (SURF) continuously since the early 1960s. The original accelerator was converted into a storage ring, called SURF II, in 1974. Then in

The DUC Summarization Evaluations

March 1, 2002
Author(s)
Donna K. Harman, Paul D. Over
There has been a long history of research in text summarization by both the text retrieval and the natural language processing communities, but evaluation of this research has always presented problems. In 2001 NIST launched a new text summarization

The New Beamline 3 at SURF III for Source-Based Radiometry

March 1, 2002
Author(s)
Ping-Shine Shaw, D A. Shear, R Stamilio, Uwe Arp, Howard W. Yoon, Robert D. Saunders, Albert C. Parr, Keith R. Lykke
The Synchrotron Ultraviolet RAdiation Facility (SURF III) at the National Institute of Standards and Technology provides a unique opportunity for high-accuracy UV to infrared radiometry due to the 70-fold improvement in the uniformity of the magnetic field

The New UV Radiometry Facility at SURF

March 1, 2002
Author(s)
Ping-Shine Shaw, Keith R. Lykke, R Gupta, Uwe Arp, Thomas B. Lucatorto, Albert C. Parr
The Synchrotron Ultraviolet Radiation Facility (SURF III) at the National Institute of Standards and Technology (NIST) provides a unique opportunity for high-accuracy VUV to visible radiometry with the completion of a recent upgrade to improve the

The superconducting strand for the CMS solenoid conductor

March 1, 2002
Author(s)
B Cure, B Blau, D Campi, Loren F. Goodrich, I L. Horvath, F Kircher, R Liikamaa, J Sepp{umlat}al{umlat}a, R P. Smith, J Teuho, L Vieillard
The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the LHC project at CERN. The design filed of the CMS superconducting magnet is 4 T, the magnetic length is 12.5 m and the free bore is 6 m. Approximately 2000 km of

The Trouble with Calcium Floride

March 1, 2002
Author(s)
John H. Burnett, Zachary H. Levine, Eric L. Shirley
We discuss the intrinsic birefringence of calcium fluoride and othercrystalline materials that may be used in the optics for 193nm and 157nmlithography, including the characterization of the effect and itsimplications for performance of lens systems at

The Visible Cement Data Set

March 1, 2002
Author(s)
Dale P. Bentz, S Mizell, Steven G. Satterfield, J E. Devaney, William L. George, Peter M. Ketcham, James R. Graham, J E. Porterfield, Daniel A. Quenard, F A. Vallee, H Sallee, E Boller, J Baruchel
With advances in X-ray microtomography, it is now possible to obtain three-dimensional representations of a material's microstructure with a voxel size of less then one micrometer. The Visible Cement Data Set represents a collection of 3-D data sets

Transformation, Ranking, and Clustering for Face Recognition Algorithm Comparison

March 1, 2002
Author(s)
Stefan D. Leigh, Nathanael A. Heckert, Andrew L. Rukhin, J G. Phillips, Elaine M. Newton, M Moody, K Kniskern, S Heath
The performance of face recognition algorithms is recently of increased interest, although to date empirical analyses of algorithms have been limited to rank-based scores such a cumulative match score and receiver operating characteristic. This paper

Transient Heating Study of Microhotplates by Using a High-Speed Thermal Imaging System

March 1, 2002
Author(s)
Muhammad Afridi, David W. Berning, Allen R. Hefner Jr., John S. Suehle, Mona E. Zaghloul, Eric Kelley, Zharadeen R. Parrilla, Colleen E. Hood
A high-speed thermal imaging system is used to investigate the dynamic thermal behavior of MEMS-based (MicroElectroMechanical Systems) microhotplate devices. These devices are suspended microstructures fabricated in CMOS technology and are used in various

DNA Hydrogel Plugs Immobilized in Microfluidic Channels with Improved Stability

February 28, 2002
Author(s)
Rebecca A. Zangmeister, K G. Olsen, David J. Ross, Michael J. Tarlov
It has been previously demonstrated that DNA, modified on the 5' end with an acrylic acid group, can be incorporated into a polyacrylamide hydrogel matrix. These types of DNA containing gels have recently been immobilized in plastic microfluidic channels

IT Security for Industrial Control Systems

February 28, 2002
Author(s)
Joseph Falco, Frederick M. Proctor, Keith A. Stouffer, Albert J. Wavering
The National Institute of Standards and Technology (NIST) is working to improve the IT security of networked digital control systems used in industrial applications. This effort is being carried out through the Process Control Security Requirements Forum

Phase Field Modeling of Elastic Domain Structures in Constrained Layers

February 28, 2002
Author(s)
Julia Slutsker
The formation and evolution of polydomain microstructure under external stress in the constrained layer are investigated by phase-field simulation and analytically using homogeneous approximation. As a result of simulation it has been shown that the three

Risk Management Guidance for Information Technology Systems

February 26, 2002
Author(s)
Joan Hash
Risk Management is the process of identifying risk, assessing risk, and taking steps to reduce risk to an acceptable level. Organizations use risk assessment, the first step in the risk management methodology, to determine the extent of the potential
Displaying 43526 - 43550 of 73697
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