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Search Publications

NIST Authors in Bold

Displaying 45426 - 45450 of 73697

Modal Cutoff in Coaxial Transmission Lines of Conical and Cylindrical Geometries

May 1, 2001
Author(s)
Claude Weil, Billy F. Riddle, David R. Novotny, Robert T. Johnk
We present numerical data on normalized cutoff wavelength versus cone half-angle for the first three higher-order TE ml modes, as well as four other modes of interest, in conical coaxial transmission lines (the co-conical line). These are given as a

Mode-Locked Erbium/Ytterbium Co-Doped Waveguide Laser

May 1, 2001
Author(s)
John B. Schlager, Berton Callicoatt, Kevin L. Silverman, Richard Mirin, Norman Sanford, D. L. Veasey
Picosecond pulses are generated from a passively mode-locked ER3+/Yb3+ co-doped planar waveguide laser in an extended cavity configuration with a semiconductor saturable absorber mode locker. Average output power exceeds 8 mW and is expected to increase

Modeling Coplanar Waveguide Structrues Constructed of Ferromagnetic Metal

May 1, 2001
Author(s)
Nicholas Cramer, Dave K. Walker
We fabricate coplanar waveguide transmission lines with thin-film Fe o.2Ni o.8 conductors. These lines demonstrate a power attenuation of 10 dB/cm at ferromagnetic resonance frequencies of 5 to 10 GHz for applied magnetic fields less than 80 kA/m (1 kOe)

Modification of Existing Welded Steel Moment Frame Connections for Seismic Resistance

May 1, 2001
Author(s)
John L. Gross, M D. Engelhardt, Chia-Ming Uang, K Kasai, N Iwankiw
The Congressional emergency appropriation resulting from the January 17, 1994, Northridge earthquake provided the Building and Fire Research Laboratory (BFRL) at the National Institute of Standards and Technology (NIST) an opportunity to expand its

Molecular Fluorescence in the Vicinity of a Nanoscopic Probe

May 1, 2001
Author(s)
H F. Hamann, M Kuno, Alan Gallagher, David Nesbitt
The dramatic modifications of molecular fluorescence in the proximity of a sharp nanoscopic probe is investigated by an apertureless or antenna-based near-field scanning optical microscope, which exploits the interactions between a fluorescent sample and a

Multiple Lateral Length Scales in Phase-Separating Thin Film Polymer Blends

May 1, 2001
Author(s)
Haonan Wang, R J. Composto, Erik K. Hobbie, Charles C. Han
The interplay of phase separation, preferential wetting, and capillary instability in thin film polymer blends is investigated using composition-profiling and surface-imaging techniques. The phase-separating films exhibit a unique morphology with two

NIST Serial Holdings 2001

May 1, 2001
Author(s)
Susan A. Sanders, S S. Edwards
This publication (23rd edition) contains bibliographic information on approximately 5,000 titles held in the NIST Research Library, representing current and noncurrent journals, periodicals, annuals, memoirs, proceedings, and transactions.

NIST Sparse BLAS User's Guide

May 1, 2001
Author(s)
K Remington, Roldan Pozo
This document provides a guide and reference manual for a portable numerical library for sparse matrix computations. These Basic Linear Algebra Subprograms (BLAS) provide kernelsfor forming sparse matrix products (of the form C = aAB + bC. where a and b

NIST: Responding to Basic Needs, Responding to Special Needs

May 1, 2001
Author(s)
L A. Greenhouse
The National Institute of Standards and Technology was established by an Act of Congress in 1901 as the National Bureau of Standards (NBS). It was charged with serving the Nation's science and industry by establishing and maintaining the fundamental

Open System Architecture for Real-time Control Using an UML Based Approach

May 1, 2001
Author(s)
Hui-Min Huang, Elena R. Messina, Harry A. Scott, James S. Albus, Frederick M. Proctor, William P. Shackleford
We describe a generic architecture that is applicable to the engineering of many real-time control problems. We further describe how UML is used to apply the architecture to the problems.

Orientation Imaging and Reorientation Dynamics of Single Dye Molecules

May 1, 2001
Author(s)
K D. Weston, Lori S. Goldner
Polarization modulation is used with confocal microscopy to measure the absorption dipole orientation and reorientation dynamics of individual dye molecules embedded in thin, spin-cast polymer films under ambient conditions. Both discrete and continuous

Permeability Prediction From Non-Destructive Imaging of Composite Microstructure

May 1, 2001
Author(s)
Joy Dunkers, Frederick R. Phelan Jr., Kathleen M. Flynn, D P. Sanders, Richard~undefined~undefined~undefined~undefined~undefined Parnas
In this work, binary images of the microstructure of a unidirectional E-glass/epoxy composite were generated from the low contrast OCT data through image de-noising, contrast enhancement and feature recognition. The resulting data were input to a lattice

Prediction of Building Integrated Photovoltaic Cell Temperatures

May 1, 2001
Author(s)
Mark W. Davis, Arthur H. Fanney, Brian P. Dougherty
A barrier to the widespread application of building integrated photovoltaics (BIPV) is the lack of validated predictive performance tools. Architects and building owners need these tools in order to determine if the potential energy savings associated with

Radio-Frequency Metrology from NBS to NIST, The Legacy

May 1, 2001
Author(s)
Dennis S. Friday
We review a century of metrology research and development in the U.S. that paralleled the birth of radio/wireless and other electromagnetic field technologies. The interplay between the scientific and technological advances and the research, measurement

Radioactive Particle Analysis by Digital Autoradiography

May 1, 2001
Author(s)
Cynthia J. Zeissler, Richard M. Lindstrom, J P. McKinley
We have been exploring ways to evaluate the activity of radioactive particles that have been detected by phosphor plate digital autoradiography based on photostimulated luminescence (PSL). A PSL system with 25υ pixel digitization has been applied to

Reconfigurable Machine Controllers using the OMAC API

May 1, 2001
Author(s)
S Birla, D -. Faulkner, John L. Michaloski, S -. Sorenson, G Weinert, James H. Yen
With enterprises facing tremendous time-to-market pressures, manufacturing systems must be implemented quickly and modified easily. The ability of the open architecture approach to reconfigure or extend existing machine controllers to meet new needs is one

Registering 3D Point Clouds: An Experimental Evaluation

May 1, 2001
Author(s)
Christoph J. Witzgall, Geraldine Cheok
Four separate laser scans of a wooden box, taken from different vantage points, were examined in a laboratory setting. Visual and numerical registration methods, aimed at aligning the individual scan data with respect to a common frame, were explored. The

Reliable Solubility Data in the Age of Computerized Chemistry: Why, How and When?

May 1, 2001
Author(s)
J R. Rumble, Angela Y. Lee, D M. Blakeslee, S L. Young
Since 1979, International Union of Pure and Chemistry (IIUPAC) Commission V.8 on Solubility Data has published over 70 compilations of evaluated data on the solubility of gases in liquids, liquids in liquids, and solids in liquids. These volumes represent

Rotational Spectrum of Sarin

May 1, 2001
Author(s)
H Walker, R D. Suenram, A C. Samuels, J O. Jensen, M W. Ellzy, J M. Lochner, D Zeroka
To demostrate the possibilities of using molecular-beam Fourier-transform microwave spectroscopy as a measurement technique to unambiguously detect and monitor chemical warfare agents, we report the first observation and assignment of the rotational

Sensor Networking and Interface Standardization

May 1, 2001
Author(s)
Kang B. Lee
Sensors are used in various industries, ranging from aerospace, automotive, biomedicine, building, industrial automation, manufacturing, and process control to environmental monitoring. Traditionally, sensor outputs are analog signals, which are then fed
Displaying 45426 - 45450 of 73697
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