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Displaying 52326 - 52350 of 73697

Magneto-Optical Trapping of Fermionic Potassium Atoms

February 1, 1998
Author(s)
F S. Cataliotti, Eric A. Cornell, C Fort, M Inguscio, F Marin, M Prevedelli, G M. Tino
We have trapped 40K in a vapor-cell magneto-optical trap starting from a natural abundance sample. This rare, weakly radioactive atom is a Fermion. The number of trapped atoms is approximately 8000 with a density of approximately equal to} 10 8 atoms/cm 3

Metallurgy of the RMS Titanic

February 1, 1998
Author(s)
Timothy J. Foecke
Metallurgical and mechanical analyses were performed on steel and rivet samples recovered from the wreck of the RMS Titanic. It was found that the steel possessed a ductile-to-brittle transition temperature that was very high for this type of steel, making

Modes of Operation Validation System (MOVS): Requirements and Procedures

February 1, 1998
Author(s)
Sharon S. Keller, Miles E. Smid
The National Institute of Standards and Technology (NIST) Modes of Operation Validation System (MOVS) specifies the procedures involved in validating implementations of the DES algorithm in FIPS PUB 46-2 , The Data Encryption Standard (DES) and the

NIST Measurement Services: NIST Multifunction Calibration System

February 1, 1998
Author(s)
Nile M. Oldham, Mark E. Parker
The NIST automated Multifunction Calibration System (MCS) for voltage, current, and resistance is described. Developed primarily to calibrate digital multimeters and calibrators, the system can also be used to test thermal converters, and

NIST Serial Holdings 1998

February 1, 1998
Author(s)
Susan A. Sanders
This publication contains bibliographic informatin on approximately 5,000 titles held in the NIST Research Library, representing current and noncurrent journals, periodicals, annuals, memoirs, proceedings, and transactions.

Review of Mission and Operations of Regional Centers

February 1, 1998
Author(s)
E S. Oldsman, G M. Ugiansky, R Jarmin
This report reviews the mission and operations of the Manufacturing Extension Partnership (MEP) Program, managed by the Department of Commerce's National Institute of Standards and Technology (NIST). It provides an overview of the program and its

Structure Analysis of the 6H - Ba[Ti,Fe 3+ ,Fe 4+ ]O 3 -d^ Solid Solution

February 1, 1998
Author(s)
I E. Grey, C Li, L M. Cranswick, Robert S. Roth, Terrell A. Vanderah
The 6H form of BaTiO 3 forms an extensive solid solution with barium iron oxide, having the general formula BaTi 1-X-yFe 3+ xFe 4+ yO 3-δ, δ=x/2, where the Feu3+^/Fe 4+ ratio depends on reaction temperature and gas atmosphere. Solid solution members having

Surface Sensitivity of Auger-Electron Spectroscopy and X-Ray Photoelectron Spectroscopy

February 1, 1998
Author(s)
Cedric J. Powell, Aleksander Jablonski, I S. Tilinin, S Tanuma, David R. Penn
A convenient measure of surface sensitivity in Auger-electron spectroscopy (AES) and x-ray photoelectron spectroscopy (XPS) is the mean escape depth (MED). If the effects of elastic-electron scattering are neglected, the MED is equal to the electron

Testing and Modeling of Fresh Concrete Rheology

February 1, 1998
Author(s)
Chiara F. Ferraris, F DeLarrard
This report presents the results of an experimental program dealing with the rheology of fresh concrete. The three main goals were: 1) Obtain rheological data on concretes produced with various mixture compositions; 2) Establish models to link mixture

Time-Domain Calibrations of D-Dot Sensors

February 1, 1998
Author(s)
Robert T. Johnk, Arthur Ondrejka
This Tech Note covers in detail the procedures that are necessary to measure the receive transfer function of a broadband electric-field sensor using direct-pulse, time-domain methods. The calibration techniques presented here are applicable to a cone and

Using S-Check ML Version 3.0

February 1, 1998
Author(s)
Robert D. Snelick, N V. Drouin, John K. Antonishek, Michael D. Indovina, M M. Courson
S-Check is a tool for detecting performance bottlenecks in programs on computer systems with multiple processors. S-Check automates the techniques of Synthetic Perturbation Screening. Synthetic Perturbation Screening systematically perturbs selected

Implementing Assertions for Object-Oriented Systems

January 30, 1998
Author(s)
D Wallace, M Schmid, M Schatz, J Voas
The state-of-the-art in software testing is continually evolving. Researchers and practitioners are inventing techniques that improve the efficiency of software testing as well as increase the reliability of the products that are being tested. One
Displaying 52326 - 52350 of 73697
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