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Displaying 30551 - 30575 of 74175

The Effect of Bi Contamination on the Solidification Behavior of Sn-Pb Solders

October 16, 2008
Author(s)
Kil-Won Moon, Ursula R. Kattner, C A. Handwerker
This paper presents experimental results and theoretical calculations that evaluate the effects of Bi contamination on the solidification behavior of Sn-Pb alloys. The pasty (mushy) range, the type of solidification path, and the microstructure of the

The Flawed-Cylinder Burst Test

October 16, 2008
Author(s)
J H. Smith
This report is a summary and compilation of the test results obtained during the development of the Flawed-Cylinder Burst Test. The Flawed-Cylinder Burst Test was developed as part of a cooperative project under the direction of the International Standards

The Fundamental Physical Constants: A New Set of Recommended Values of the Basic Constants and Conversion Factors of Physics and Chemistry Incorporating Recent Data Has Just Been Issued by CODATA

October 16, 2008
Author(s)
Peter J. Mohr, Barry N. Taylor, David B. Newell
The Committee on Data for Science and Technology (CODATA) was established in 1966 as an interdisciplinary committee of the International Council of scientific Unions (now International council of Science). Three years later, CODATA created the task group

The Glass Transition: Its Measurement and Underlying Physics

October 16, 2008
Author(s)
G B. McKenna, S L. Simon
The glass transition is an important phenomenon in the practical world, where it determines the use temperature and processing temperature for many materials, particularly polymers. In addition, the underlying physics of glassy materials, while extensively

The Increasing Role of Fractography in the Dental Community

October 16, 2008
Author(s)
Janet Quinn, Susanne Scherrer, George D. Quinn
The development of new fabrication capabilities along with new alloys, polymers, composites and advanced ceramics has revolutionized many industries including the manufacture of dental restorations. The testing of dental materials has barely kept pace with

The Influence of Ceramic Interphases on the Creep Behavior of Silicon Nitride

October 16, 2008
Author(s)
Sheldon M. Wiederhorn
In this paper we discuss the role played by the intergranular phases in the creep of silicon nitride, which is completely controlled by the amount and effective viscosity of the intergranular phases. After briefly reviewing the structure and creep behavior

The Journal Of Physical and Chemical Reference Data

October 16, 2008
Author(s)
M W. Chase
The Journal of Physical and Chemical Reference Data (JPCRD), a joint venture of the AmericanInstitute of Physics and the National Institute of Standards and Technology, was first published in 1972. The participation of these organizations is a recognition

The Ne II Spectrum

October 16, 2008
Author(s)
Alexander Kramida, Gillian Nave
Spectra of neon-filled hollow cathode discharge lamps were observed by means of high-resolution Fourier-transform spectroscopy (FTS) covering the region from vacuum ultraviolet to near infrared. By combining these new measurements with results of other FTS

The New MOU

October 16, 2008
Author(s)
K J. Leuteritz
This article describes the changes that were made to the ANSI-NIST MOU which was revised and signed on 9/22/98. ANSI is the American National Standards Institute.

The New NIST Water Flow Calibration Facility

October 16, 2008
Author(s)
V S. Gowda, Tsyh Tyan Yeh, Pedro I. Espina, N Yende
A static-gravimetric liquid flow calibration facility is under construction at the NIST Gaithersburg Campus. The facility is designed to calibrate flow meters from 25 mm to 400 mm in diameter, at flow rates from 8 L/min to 38,000 L/min. It incorporates a

The NIST Rotating Braille Reader for Electronic Books

October 16, 2008
Author(s)
John W. Roberts, V R. McCrary
¿¿¿We have developed a new technology to reduce the cost of Braille-based information accessibility. Millions of blind and visually impaired people in the US (and far higher numbers worldwide) need some form of non-visual access to information. The

The NIST Standards in Trade Program

October 16, 2008
Author(s)
P L. Heydemann
Plans, organizes, and manages the placement of technical experts from NIST, or selected by NIST, in key U.S. embassies and missions to provide technical advice and support to commercial and economic staffs in the identification and resolution of trade

The Nuts and Bolts and Results of Fluorine Bomb Calorimetry

October 16, 2008
Author(s)
P A. O'Hare
The technique of fluorine bomb calorimetry is outlined with special emphasis on the experimental methods, including the construction of the reaction vessel and manifold for operations with F 2. A detailed description is included of a determination of the
Displaying 30551 - 30575 of 74175
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