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Displaying 20026 - 20050 of 73751

Guidance Document: Emergency Communication Strategies for Buildings

March 3, 2014
Author(s)
Erica D. Kuligowski
The purpose of this report is to provide guidance to system designers, building managers and/or building emergency personnel responsible for emergency communication on how to create and disseminate messages using basic communication modes (audible and/or

How to weigh everything from atoms to apples using the revised SI

March 3, 2014
Author(s)
Jon R. Pratt
The fact that the unit of mass might soon be derived from the Planck constant, rather than from an artifact standard, can seem daunting and downright baffling when viewed from the vantage point of our day to day perception of mass. After all, at

Optical self-focusing effect in coherent light scattering with condensates

March 3, 2014
Author(s)
Lu Deng, Edward W. Hagley, C.J. Zhu, G.X. Huang
We present a theoretical investigation of optical self-focusing effects in light scattering with condensates. Using long (>200 μs), red-detuned pulses we show numerically that a nonnegligible self-focusing effect is present that causes rapid optical beam

SRM Spotlight

March 3, 2014
Author(s)
Regina R. Montgomery
The SRM Spotlight is a newsletter published by the Office of Reference Materials for users of NIST standard reference materials. The Spotlight announces new reference materials and provides information about their use. In addition, this newsletter contains

Stair Evacuation of People with Mobility Impairments

March 3, 2014
Author(s)
Erica D. Kuligowski, Richard Peacock, Bryan Hoskins, Emily Wiess
The time that it takes a population to reach safety when descending a stairwell during building evacuations is typically described by measureable engineering variables. These engineering variables include stairwell geometry, speed, density, and pre

Unusual Bias Temperature Instability in SiC DMOSFET

March 3, 2014
Author(s)
Zakariae Chbili, Kin P. Cheung, Jason P. Campbell, John S. Suehle, D. E. Ioannou, Aivars Lelis, Sei-Hyung Ryu
We observe an unusual instability in the SiC DMOSFET transistor characteristics. From a series of bias conditions at elevated temperatures, we conclude that a high density of hole traps in the oxide near the SiO2/SiC interface are responsible.

Calibrations for Millimeter-Wave Silicon Transistor Characterization

March 1, 2014
Author(s)
Dylan F. Williams, Phillip Corson, Sharma Jahnavi, Krishnaswamy Harish, Wei Tai, George Zacharias, Ricketts David, Watson Paul, Dacquay Eric, Voinigescu Sorin
This paper compares on-wafer thru-reflect-line (TRL) and off-wafer short-open-load-thru (SOLT) and line-reflect-reflect-match (LRRM) vector-network-analyzer probe-tip calibrations for amplifier characterization and parasitic-extraction calibrations for

Certification of Total Arsenic in Blood and Urine Standard Reference Materials by Radiochemical Neutron Activation Analysis and Inductively Coupled Plasma Mass Spectrometry

March 1, 2014
Author(s)
Rick L. Paul, William C. Davis, Karen E. Murphy, Colleen E. Bryan Sallee, Lee L. Yu, William F. Guthrie, Dennis D. Leber, Thomas W. Vetter
A newly developed procedure for determination of arsenic by radiochemical neutron activation analysis was used to measure arsenic in SRM 955c Toxic Elements in Caprine Blood and SRM 2668 Toxic Elements in Frozen Human Urine for the purpose of providing

Effects of nanoparticle size and charge on interactions with self-assembled collagen

March 1, 2014
Author(s)
Dongbo Wang, Jing (. Ye, Steven Hudson, Keana Scott, Sheng Lin-Gibson
Recent insights into bone formation have suggested that the critical first step to the biomineralization process is the integration of small (nanometer dimension) mineral clusters into collagen fibers. Such behavior is of intrinsic interest for the areas

Fire Characteristics of Steel Members Coated with Nano-Enhanced Polymers

March 1, 2014
Author(s)
Kathryn M. Butler, Alexander H. Cheng, Christopher Mullen, Ahmed Al-Ostaz
Applying a polymeric coating on steel members has been demonstrated to be an effective countermeasure for the threat of blast on building and other structures. The development of a blast-resistant coating for steel with good characteristics in a fire would

Power Supply Issues for Wireless Sensor Networks: A Review

March 1, 2014
Author(s)
Wenqi Guo, William M. Healy, Mengchu Zhou
Wireless sensor networks (WSNs) have enabled numerous embedded wireless applications in different areas such as military/battlefield, environmental monitoring, and intelligent building systems. They consist of a large number of nodes that need to operate

Precision high-value resistance scaling with a two-terminal cryogenic current comparator

March 1, 2014
Author(s)
Randolph E. Elmquist, George R. Jones, Felipe L. Hernandez-Marquez, Marcos Bierzychudek
We describe a cryogenic two-terminal high-resistance bridge and its application in precision resistance scaling from the quantized Hall resistance (QHR) at RH = RK/2 = 12 906.4035 _ to decade resistance standards with values between 1 M_ and 1 G_. The

ASME International Steam Tables for Industrial Use, Third Edition

February 28, 2014
Author(s)
Allan H. Harvey, William T. Parry, James C. Bellows, John S. Gallagher, Richard D. Harwood
This is an update of the standard ASME "Steam Tables" book, giving tables and charts of thermodynamic and transport properties for water and steam, along with background text describing the tables and calculations. The main change from the previous (2nd)
Displaying 20026 - 20050 of 73751
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