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Displaying 40526 - 40550 of 73963

Stoichiometric Preference in Copper-Promoted Oxidative DNA Damage by Ochratoxin A

October 1, 2003
Author(s)
R A. Manderville, W M. Calcutt, J Dai, G Park, I G. Gillman, R E. Noftle, A K. Mohammed, M. Dizdaroglu, H Rodriguez, S A. Akman
The ability of the fungal carcinogen, ochratoxin A (OTA, 1), to facilitate copper-promoted oxidative DNA damage has been assessed using supercoiled plasmid DNA (Form I)/agarose gel electrophoresis and gas chromatography/mass spectrometry with selected-ion

The Effect of Anisotropic Surface Energy on the Rayleigh Instability

October 1, 2003
Author(s)
Katharine F. Gurski, Geoffrey B. McFadden
We determine the linear stability of a rod or wire subject to capillary forces arising from an anisotropic surface energy. The rod is assumed to be smooth with a uniform cross section given by a 2-D equilibrium shape. The stability analysis is based on

Thermal Imaging of Metals in a Kolsky-Bar Apparatus

October 1, 2003
Author(s)
Howard W. Yoon, D Basak, Richard L. Rhorer, Eric P. Whitenton, Timothy J. Burns, Richard J. Fields, Lyle E. Levine
For materials testing at elevated temperatures, we describe the design and the development of a resistively heated Kolsky-bar apparatus. The temperature of the sample is determined by non-contact thermometry and the spatial temperature gradients in the

Thirteenth International Conference on Computer Technology in Welding

October 1, 2003
Author(s)
Thomas A. Siewert, William G. Rippey
The Thirteenth International Conference on Computer Technology in Welding was held June 18, 2003 in Orlando, Florida, under the sponsorship of the American Welding Society, the National Institute of Standards and Technology (NIST), and The Welding Institue

Turnstile Operation Using a Silicon Dual-Gate Single-Electron Transistor

October 1, 2003
Author(s)
Yukinori Ono, Neil M. Zimmerman, Kenji Yamazaki, Yasuo Takahashi
A single-electron turnstile has been demonstrated using a silicon-based dual-gate single-electron transistor (SET). Each gate controls independently the closing and opening of the channel acting as the SET lead, which enables single-electron transfer

Critical Dimension Calibration Standards for ULSI Metrology

September 30, 2003
Author(s)
Richard A. Allen, Michael W. Cresswell, Christine E. Murabito, Ronald G. Dixson, E. Hal Bogardus
NIST and International SEMATECH are developing single-crystal reference materials for use in evaluating and calibrating critical dimension (CD), that is linewidth, metrology tools. Primary calibration of these reference materials uses a high-resolution

Evolution of a Performance Metric for Urban Search and Rescue Robots (2003)

September 30, 2003
Author(s)
Adam S. Jacoff, Brian A. Weiss, Elena R. Messina
This paper discusses the advancement and proliferation of the Reference Test Arenas for Urban Search and Rescue Robots as representative search and rescue environments, which allow objective performance evaluation of mobile robot capabilities. These arenas

Osteoblast Cell Membrane Hybrid Bilayers for Studying Cell-Cell Interactions

September 30, 2003
Author(s)
John T. Elliott, Alessandro Tona, John T. Woodward IV, Curtis W. Meuse, H M. Elgendy, Anne L. Plant
Osteopath-like cells were grown on a surface that presents cell membrane components to the cells in culture. The culture surface was a bilayer formed by the interaction of osteoblast plasma membrane vesicles with an alkanethiol monolayer. We examined the

Semiconductor Electronics Division

September 30, 2003
Author(s)
David G. Seiler, Erik M. Secula
This is a high-level, full-color brochure detailing the activities and challenges of the Semiconductor Electronics Division. Topics include Division history, nanotechnology, MEMS, electrical test structures, power electronics, optical and electrical

Thickness Evaluation for 2nm SiO2 Films, a Comparison of Ellipsometric, Capacitance-Voltage and HRTEM Measurements

September 30, 2003
Author(s)
James R. Ehrstein, Curt A. Richter, Deane Chandler-Horowitz, Eric M. Vogel, Donnie R. Ricks, Chadwin Young, Steve Spencer, Shweta Shah, Dennis Maher, Brendan C. Foran, Alain C. Diebold, Pui-Yee Hung
We have completed a comparison of SiO2 film thicknesses obtained with the three dominant measurement techniques used in the IC industry . This work is directed at evaluating metrology capability that might support NIST- traceable Reference Materials for

Fluorescence Thermometry in Microfluidics

September 29, 2003
Author(s)
David J. Ross, Laurie E. Locascio
Two techniques are described for the measurement of fluid temperatures in microfluidic systems based on temperature-dependent fluorescence. In the first technique, a single, strongly temperature-dependent fluorophore, rhodamine B, is used as the basis for

Recommendations for Application of CO 2 -Based Demand Controlled Ventilation Including Proposed Guidance for ASHRAE Standard 62 and California's Title 24

September 29, 2003
Author(s)
Andrew K. Persily, Jim Braun, Steven J. Emmerich, Kevin Mercer, Tom Lawerence
Carbon dioxide (CO2) based demand controlled ventilation (DCV) has been proposed and implemented for many years as a strategy for increasing energy efficiency by providing outdoor air ventilation rates based on actual occupancy rather than design occupancy

Composition Verification of AlGaAs Epitaxial Layers using Inductively Coupled Plasma Optical-Emission Spectroscopy

September 28, 2003
Author(s)
Kristine A. Bertness, Todd E. Harvey, Albert J. Paul, Larry Robins, Gregory C. Turk, Therese A. Butler, Marc L. Salit
We have applied an analytical chemistry method, inductively coupled plasma optical-emission spectroscopy (ICP-OES), to increase the accuracy of composition measurement of AlGaAs epitaxial thin films. ICP-OES results were compared with composition

Prototype system for superconducting quantum interference device multiplexing of large-format transition-edge sensor arrays

September 25, 2003
Author(s)
Carl D. Reintsema, Joern Beyer, Sae Woo Nam, Steven Deiker, Gene C. Hilton, Kent D. Irwin, Joel N. Ullom, Leila R. Vale, Michael MacIntosh
We discuss the implementation of a time-division SQUID multiplexing system for the instrumentation of large-format transition-edge sensors (TES) arrays. We cover design and integration issues concerning cryogenic SQUID multiplexers and amplifiers, signal
Displaying 40526 - 40550 of 73963
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