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Displaying 1926 - 1947 of 1947

NIST Technical Publication

February 1, 2006
Author(s)
James R. Ehrstein, M C. Croarck, H Liu
This report documents the selection of material, the certification procedure and its control, and the analysis of measurement uncertainty for a family of improved Standard Reference Materials (SRMs) for sheet resistance and resistivity of silicon wafers

Design and Uncertainty Analysis for a PVTt Gas Flow Standard

February 1, 2003
Author(s)
John D. Wright, Aaron N. Johnson, Michael R. Moldover
A new pressure, volume, temperature, and time (PVTt) primary gas flow standard has been constructed at the National Institute of Standards and Technology with an expanded uncertainty of between 0.02 % and 0.05 % (k = 2). The standard covers a flow range of

Computed Images of Dielectric Strips on a Substrate

January 1, 2003
Author(s)
Egon Marx
Accurate computed optical images of lines and trenches placed on semiconductors are of great interest to the manufacturers of computer components, especially in the overlay process for different layers. These images do not accurately reflect the form of

An Introduction to Evaluating Biometric Systems

February 1, 2000
Author(s)
P J. Phillips, Alvin F. Martin, Charles L. Wilson, Mark A. Przybocki
How and where biometric systems are deployed will depend on their performance. Knowing what to ask and how to decipher the answers can help you evaluate the performance of these emerging technologies. On the basis of media hype alone, you might conclude

Using Chemical Kinetic Effects for Understanding and Developing Chemical Sensors

February 1, 2000
Author(s)
M C. Wheeler, Richard E. Cavicchi, G Poirier, Stephen Semancik
While conductometric gas sensing has been widely studied, the mechanisms are not well understood (particularly for modified oxides). For example, what magnitude of conductance change occurs for a given coverage of adsorbed analyte? We are using specially

NIST Outdoor Structure Separation Experiments (NOSSE) with Wind

May 31, 2023
Author(s)
Alexander Maranghides, Shonali Nazare, Eric Link, Kathryn Butler, Erik L. Johnsson, Matthew Bundy, Artur A. Chernovsky, Frank Bigelow, Steven Hawks, William (Ruddy) Mell, Anthony Bova, Thomas Milac, William Walton, Bob Raymer, Frank Frievalt
… was an assembly including an exterior wall with a window and a roof with a vented eave. Effects of shed …

INTERPOL Review of Forensic Biology and DNA, 2023-2025

June 14, 2026
Author(s)
John Butler
As a part of the 21st INTERPOL International Forensic Science Managers Symposium, this work explores the latest scientific developments, methodologies, and trends in forensic biology and forensic DNA analysis of biological evidence during the years 2023 to

Intermediate Scale Flame Spread Test Apparatus for CFD Fire Model Validation

March 27, 2025
Author(s)
Karen De Lannoye, Isaac Leventon
Upward and inclined flame spread are common fire-hazard scenarios that are particularly dangerous due to their relatively high spread rate (compared to downward or lateral spread). Several previous studies have addressed upward flame spread, both in

Report on High Energy Arcing Fault Experiments - International Experimental Results from Bus Duct and Switchgear Enclosures

July 1, 2024
Author(s)
Gabriel Taylor, Anthony D. Putorti Jr., Scott Bareham, Christopher U. Brown, Wai Cheong Tam, Michael Heck, Lucy Fox, Stephen Fink, Michael Selepak, Edward Hnetkovsky, Nicholas Melly, Kenneth Hamburger, Kenneth Miller
This report documents an experimental program designed to collect data and information to evaluate the performance of models developed to estimate the electrical high energy arcing fault (HEAF) hazard. This report covers full-scale laboratory experiments

Next Generation Simulation-based Design Technologies for Electronics Product Realization

May 1, 2005
Author(s)
Manas Bajaj, Dirk Zwemer, Russell Peak, Mike Dickerson, Thomas Thurman, Kevin G. Brady, John V. Messina
The realm of electronics product realization is marked by an extremely fast-paced market, stringent demands for product reliability and high importance to innovative design. Further, the time-to-market and the cost-to-realize play a critical role for

SSCP Analysis of Point Mutations by Multi-Color Capillary Electrophoresis

November 1, 1999
Author(s)
K Hayashi, H M. Wenz, M Inazuka, T Tahira, Donald H. Atha
Virtually all methods for the detection of mutations (polymorphism or variant) rely on polymerase chain reaction (PCR). Direct sequence determination of a PCR product is the gold standard for identifying mutaions. However, the vast majority of the signal

Discovery of digital forensic dataset characteristics with CASE-Corpora

July 11, 2022
Author(s)
Alexander Nelson
The digital forensics community has generated training and reference data over the course of decades. However, significant challenges persist today in the usage pipeline for that data, from research problem formulation, through discovery of applicable

Experiments in Dilute Atomic Bose-Einstein Condensation

November 1, 1999
Author(s)
Eric A. Cornell, J R. Ensher, C E. Wieman
Why BEC? - In the month we began writing this paper, fourteen papers on the explicit topic of Bose-Einstein condensation (BEC) in a dilute gas appeared in the pages of Physical Review. Both theoretical and experimental activity in BEC has expanded

Kinetically-Controlled Chemical Sensing Using Micromachined Structures

May 1, 1998
Author(s)
Stephen Semancik, Richard E. Cavicchi
Microdevices produced by machining silicon can offer a variety of control functionality on a miniature scale, 1.2 with general advantages connected to not only reduced size (less invasive), but also lower power requirements, lower cost, and reproducibility

Superconformal Film Growth: From Smoothing Surfaces to Interconnect Technology

April 20, 2023
Author(s)
Thomas P. Moffat, Trevor Braun, David Raciti, Daniel Josell
CONSPECTUS: State-of-the-art manufacturing of electronics involves the electrodeposition of Cu to form 3-D circuitry of arbitrary complexity. This ranges from nanometers wide interconnects between individual transistors to increasingly large multilevel

Kinetic, Stereochemical, and Structural Effects of Mutations of the Active Site Arginine Residues in 4-Oxalocrotonate Tautomerase

July 1, 1999
Author(s)
T K. Harris, R M. Czerwinski, W H. Johnson, P M. Legler, C Abeygunawardana, M A. Massiah, J T. Stivers, C P. Whitman, A S. Mildvan
Three arginine residues (Arg-11, Arg-39, Arg-61) are found at the active site of 4-oxalocrotonate tautomerase in the X-ray structure of the affinity-labeled enzyme [Taylor, A. B., Czerwinski, R. M., Johnson Jr., R. M., Whitman, C. P., and Hackert, M. L.

Effects of Mutations of the Active Site Arginine Residues in-4-Oxalocrotonate Tautomerase on the pK a Values of Active Site Residues and on the pH Dependence of Catalysis

July 1, 1999
Author(s)
R M. Czerwinski, T K. Harris, W H. Johnson, P M. Legler, J T. Stivers, A S. Mildvan, C P. Whitman
The unusually low pK a value of the general base catalyst Pro-1 (pK a = 6.4) in 4-oxalocrotonate tautomerase (4-OT) has been ascribed to both a low dielectric constant at the active site and to the proximity of the cationic residues Arg-11 and Arg-39
Displaying 1926 - 1947 of 1947
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