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Search Publications

NIST Authors in Bold

Displaying 45676 - 45700 of 73697

Distribution of Link Distances in a Wireless Network

March 1, 2001
Author(s)
Leonard E. Miller
The probability distribution is found for the link distance between two randomly positioned mobile radios for two representative deployment scenarios: (1) the mobile locations are uniformly distributed over a rectangular area and (2) the x and y

Evaluating Collaborative Enterprises - A Workshop Report

March 1, 2001
Author(s)
Robert Allen, Michelle P. Steves
As part of the WETICE 2001 conference, the workshop on Evaluating Collaborative Enterprises continued from its debut last year exploring the issues surrounding the evaluation of collaborative enterprises. This exploration included methods and tools for

Fast and Accurate Measurement of the Dispersion of Cascaded Components

March 1, 2001
Author(s)
Shellee D. Dyer, Allen Rose, Kent B. Rochford
We show that the dispersion of multiple cascaded components can be determined from a single low-coherence interferometric measurement. This measurement is not adversely affected by other components in the system, regardless of their wavelength reflection

Flammable and Combustible Liquid Spill/Burn Patterns

March 1, 2001
Author(s)
Anthony D. Putorti Jr., Jay A. McElroy, Daniel M. Madrzykowski
Discussions with fire investigators indicate that it would be beneficial to have the ability to predict the quantity of liquid fuel necessary to create a burn pattern of a given size. Full-scale spill and fire experiments were conducted with gasoline and

Four-Port Microwave Measurement System Speeds On-Wafer Calibration and Test

March 1, 2001
Author(s)
Dave K. Walker, Dylan F. Williams, Allen Padilla, Uwe Arz, Hartmut Grabinski
A multiport measurement system comprising a coaxial switch network and comprehensive freeware package extends the capabilities of a user's two-port automatic network analyzer and probe station to three-and four-port measurements. The coaxial switch matrix

Frequency Response Metrology for High-Speed Optical Receivers

March 1, 2001
Author(s)
Paul D. Hale, Tracy S. Clement, Dylan F. Williams
There are two types of optical sources whose modulation can be measured or calculated from fundamental principles: the hererodyne beat between two single- frequency lasers (frequency-domain) and the short pulse from a mode-locked laser (time-domain). While

How to Succeed at High Speed Machining

March 1, 2001
Author(s)
Matthew A. Davies, Tony L. Schmitz, Brian S. Dutterer
This article summarizes the experiences at NIST in High Speed Machining (HSM) over the past four years. It is a general, non-technical article that describe the issues that must be considered on the shop floor to successfully implement HSM. Several example

Hysteresis in Transport Critical-Current Measurements of Oxide Superconductors

March 1, 2001
Author(s)
Loren F. Goodrich, Theodore C. Stauffer
We have investigated magnetic hysteresis in transport critical-current (I c) measurements of Ag-matrix (Bi, Pb) 2Sr 2Ca 2Cu 3O 10-x (Bi-2223) and AgMg-matrix Bi 2Sr 2CaCu 2O 8+x (Bi-22-2212) tapes. I c hysteresis causes measurements with field, angle, and

Implications and Ramifications of Model-Driven Architecture

March 1, 2001
Author(s)
David W. Flater
The Object Management Group (the consortium that issues the Common Object Request Broker Architecture and Unified Modeling Language standards) is making the transition from a standards architecture in which only interface definitions are normative to one

Introduction to ISO 10303 - the STEP Standard for Product Data Exchange

March 1, 2001
Author(s)
Mike Pratt
Since 1984 the International Organization for Standardization (ISO)has been working on the development of a comprehensive standard for the electronic exchange of product data between computer-based product life-cycle systems. Initial concentration has been

Jim Zimmerman and the SQUID

March 1, 2001
Author(s)
Richard L. Kautz
The career of Jim Zimmerman, beginning with a solid foundation in electronics and cryogenics, reached a turning point in 1965 when he became coinventor of the rf SQUID (Superconducting Quantum Interference Device), while working at the Scientific

Laser Scanning for Construction Metrology

March 1, 2001
Author(s)
Geraldine S. Cheok, William C. Stone, Robert R. Lipman, Christoph J. Witzgall, Javier Bernal
This paper summarizes work at the National Institute of Standards and Technology (NIST) in the Non-Intrusive Scanning Technologies for Construction Assessment Project. It will briefly describe the initial proof-of-concept phase of this project, the

Laser-Excited Hot-Electron Induced Desorption

March 1, 2001
Author(s)
John William Gadzuk
The history and technical highlights leading up to and following the publication of a classic NIST publication on the theory and experiments involving optical-laser induced desorption of adsorbed NO from metal surfaces is presented.

Mechanical Properties of High-Strength Concrete at Elevated Temperatures

March 1, 2001
Author(s)
Long T. Phan, Nicholas J. Carino
This report describes results of NIST's experimental program that focuses on effects of elevated temperature exposure on mechanical properties of hing strength concrete (HSC). Mechanical properties were measured by heating, with and without preload, the
Displaying 45676 - 45700 of 73697
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