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Displaying 25276 - 25300 of 73970

Test Structure Fundamentals

April 4, 2011
Author(s)
Richard A. Allen
Test structures are critical tools for semiconductor manufacturers, allowing for understanding of the process and individual circuit elements that cannot be acquired from measurements of the circuits, which can have billions of transistors and other

A Major Role for Non-Enzymatic Antioxidant Processes in the Radioresistance of Halobacterium salinarum

April 1, 2011
Author(s)
M Miral Dizdar, Pawel Jaruga, Courtney K. Robinson, Kim Webb, Amardeep Kaur, Nitin S. Baliga, Allen Place, Jocelyne DiRuggiero
Oxidative stress occurs when the generation of reactive oxygen species (ROS) exceeds the capacity of the cell’s endogenous systems to neutralize them. We analyzed the oxidative stress responses and cellular damage of the archaeon Halobacterium salinarum

After the Alarm Sounds: How We Got Here, Where We Are, and Where We Should Go

April 1, 2011
Author(s)
Jason D. Averill, Erica D. Kuligowski, Richard D. Peacock
This article reviews the history of egress design and code requirements in the United States, describes the current state-of-the-art in egress design and modeling, and offers a strawman research agenda for future egress research.

An Engineer Grapples with Sustainable Manufacturing

April 1, 2011
Author(s)
Vijay Srinivasan
A personal view by the author of how, as a research engineer and manager, first in the private sector and now in government service, he witnessed the emergence of a compelling case for sustainable manufacturing and also gained several important insights

Humic Acid-Mediated Silver Nanoparticle Formation Under Environmentally Relevant Conditions

April 1, 2011
Author(s)
Nelson Akaighe, Robert I. MacCuspie, Divina A. Navarro, Diana S. Aga, Sarbajit Banerjee, Mary Sohn, Virender K. Sharma
The formation of silver nanoparticles (AgNPs) via reduction of silver ions (Ag+) in the presence of humic acids (HAs) under various environmentally relevant conditions is described. HAs tested were from Suwannee River (SUW), and samples of three sediment

Measuring Step Gauges Using the NIST M48 CMM

April 1, 2011
Author(s)
John R. Stoup, Bryon S. Faust
The Moore M48 coordinate measuring machine (CMM) has provided NIST with flexible measurement capabilities for many years. The machine’s state of the art performance was further improved following the move of the machine into the new Advanced Measurement

Neutron Scattering and Spectroscopic Studies of Hydrogen Adsorption in Cr 3 (BTC) 2 - A Metal-Organic Framework with Exposed Cr 2+ Sites

April 1, 2011
Author(s)
Kenji Sumida, Jae-Hyuk Her, Mircea Dinca, Leslie J. Murray, Jennifer M. Schloss, Christopher J. Pierce, Benjamin A. Thompson, Stephen A. FitzGerald, Craig Brown, Jeffrey R. Long
Microporous metal-organic frameworks possessing exposed metal cation sites on the pore surface are of particular interest for high-density H 2 storage at ambient temperatures, owing to the potential for H 2 binding at the appropriate isosteric heat of

NIST Workshop on Ontology Evaluation (NISTIR 7774)

April 1, 2011
Author(s)
Ram D. Sriram, Conrad E. Bock, Fabian M. Neuhaus, Evan K. Wallace, Mary C. Brady, Mark Musen, Joanne Luciano
The National Institute for Standards and Technology sponsored a workshop in October, 2007, on the subject of ontology evaluation. An international group of invited experts met for two days to discuss problems in measuring ontology quality. The workshop

Onset of Morphological Instability in Two Binary Liquid Layers

April 1, 2011
Author(s)
Geoffrey B. McFadden, Sam R. Coriell, Aaron Lott
We consider the linear stability of a horizontal fluid bilayer subject to vertical heating. The two layers consist of a binary fluid that has undergone a phase transition, resulting in a horizontal interphase boundary between two phases with different

Performance of New and Aged Residential Fire Smoke Detectors

April 1, 2011
Author(s)
Jason D. Averill, Richard G. Gann, William F. Guthrie, Daniel Murphy
As part of the Consumer Product Safety Commission (CPSC) technical staff program to determine the effects of emissions from imported drywall on residential electrical, gas distribution, and fire safety components, the National Institute of Standards and

Primary Calibration of Accelerometers by Optical Methods, NIST and USAF

April 1, 2011
Author(s)
Beverly F. Payne, Jerry Steffen
This paper describes ongoing efforts to provide high quality calibration of accelerometers by NIST for military and civilian labs. Traditionally the approach is the calibration of reference accelerometers by NIST for labs requiring calibrations with the

RFID-based Localization and Tracking Technologies

April 1, 2011
Author(s)
Michael R. Souryal, Lionel M. Ni, Dian Zhang
Radio Frequency Identification (RFID) usually incorporates a tag into an object for the purpose of identification or localization using radio signals. It has gained a lot of attention recently due to its advantages in terms of low cost and easy deployment

Searching for applications with a fine-toothed comb

April 1, 2011
Author(s)
Nathan R. Newbury
Frequency combs, like many ground-breaking technologies, are simple in concept; they results from the spectrum of any regular train of optical pulses. What is remarkable is that this simple picture can be actually realized in a number of different

Wolter Optics for Neutron Focusing

April 1, 2011
Author(s)
David F. Mildner, M. V. Gubarev
Focusing optics based on Wolter optical geometries developed for x-ray grazing incidence beams can be designed for neutron beams. Wolter optics are formed by grazing incidence reflections from two concentric conic sections (for example, a paraboloid and a
Displaying 25276 - 25300 of 73970
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