U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 50726 - 50750 of 74160

Simulation and Performance Study of PNNI ATM Networks

March 1, 1999
Author(s)
Y M. Song, David E. Cypher, David H. Su
This paper presents the simulation and performance of PNNI ATM networks by using an ATM PNNI Routing Protocol Simulator (APRoPS). This simulator was developed based on the ATM Forum s PNNI routing protocol specification. With this simulator, one can design

Stable Quasicrystalline Sphere Packing

March 1, 1999
Author(s)
Eric J. Cockayne, M Mihalkovic
Wills (1990, J. Phys., Paris 51, 1061), found a method relating certain decagonal disk packings to decagonal sphere packings with high packing fractions. Applying this technique to the decagonal rectangle-triangle tiling generated by inflation, we obtain a

Strain Measurements in A Thermally-Cycled Flip-Chip PBGA Solderball

March 1, 1999
Author(s)
Elizabeth S. Drexler
The mismatch between the coefficients of thermal expansion of the silicon chip and the organic substrate has been mitigated through the practice of using underfill in flip-chip packages. Yet solder fatigue and package failures still occur. This is

Structural and Magnetic Properties of Electrodeposited Co/Cu Multilayers

March 1, 1999
Author(s)
M Shima, L Salamanca-Riba, Thomas P. Moffat, Robert D. McMichael
A series of [Co(x ML)/Cu(17 ML)]100 multilayers were electrodeposited on Si(0 0 1) substrates covered with Cu seed layers. Magnetic hysteresis loops for lms with x 2 ML have sigmoidal shapes and the temperature dependence indicates a superparamagnetic

Summary of ISO/TC 201 Standards: Introduction

March 1, 1999
Author(s)
Cedric J. Powell, R Shimizu
An introduction is given to a planned series of short summaries of international standards developed by Technical Committee 201 on Surface ChemicalAnalysis of the International Organization for Standardization (ISO). The purpose of these summaries is to

The New NIST Atomic Spectra Database (1999)

March 1, 1999
Author(s)
Daniel E. Kelleher, William C. Martin, Wolfgang L. Wiese, J Sugar, Jeffrey R. Fuhr, Karen J. Olsen, Arlene Musgrove, Peter J. Mohr, Joseph Reader, G R. Dalton
The new NIST Atomic Spectra Database (ASD) interactive Web site is accessible via: http://atm.nist.gov/asd. The new version covers a much wider range of atomic and ionic transitions and energy levels than earlier versions, and all data are integrated. ASD

The NIST Design Repository Project

March 1, 1999
Author(s)
Simon Szykman, Ram D. Sriram, Christophe Bochenek, J Racz
Modern engineering industry is relying more and more on the use of knowledge in product development. This paper advocates design repositories as a natural progression from traditional design databases to systems that are created to more actively support

The NIST Watt Balance: Recent Results and Future Plans

March 1, 1999
Author(s)
David B. Newell, Richard L. Steiner, Edwin R. Williams
The last remaining SI base unit defined by an artifact is the kilogram. The NIST watt balance has been designed to measure the ratio of mechanical to electrical power, linking the artifact kilogram, the meter, and the second to the practical realizations

Theory for Ionization of Molecules by Electrons

March 1, 1999
Author(s)
Yong Sik Kim, M E. Rudd
A simple yet effective theory for the total ionization cross sections of molecules by electron impact is described. The theory, called the Binary Encounter Bethe [BEB] model, combines a modified form of the Mott cross section for low incident energies T

Ultrafast Glimpses at Water and Ice

March 1, 1999
Author(s)
Edwin J. Heilweil
Recent literature reports of transient infrared hole-burning and spectroscopic measurements on water and ice are critically reviewed. Dynamical measurements on the femtosecond and picosecond timescales show anomalous vibrational relaxation temperature

VAMAS Technical Working Area #3

March 1, 1999
Author(s)
George D. Quinn, E F. Begley
Technical Working Area #3, Ceramics of the Versailles Advanced Materials and Standards (VAMAS) project has conducted 12 projects and 12,000 experiments over 12 years. This website explains TWA3, and lists the key accomplishments and publications from the

Visualization of Bose-Einstein Condensates

March 1, 1999
Author(s)
Peter M. Ketcham, D L. Feder, W P. Reinhardt, Charles W. Clark, William L. George
A Bose-Einstein condensate (BEC) is a state of matter that exists at extremely low temperatures.BECs are currently under investigation through both numerical simulation and laboratory experiments.The visualization of data generated by numerical simulation

Design of a Digital Mathematical Library for Science, Technology and Education

February 26, 1999
Author(s)
Daniel W. Lozier, Bruce R. Miller, Bonita V. Saunders
The concept of a digital library is of proven worth because of its ability to provide dramatic capabilities that are impossible with traditional print media. We are interested in providing such capabilities for scientific, technical and educational users
Displaying 50726 - 50750 of 74160
Was this page helpful?