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Displaying 25876 - 25900 of 74176

Changes

January 3, 2011
Author(s)
Isabel M. Beichl

Clean agent suppression of energized electrical equipment fires

January 3, 2011
Author(s)
Gregory T. Linteris
The NFPA 2001 standard on the use of clean agents for the suppression of fires arose from the phase-out of Halon 1301. Standard methods exists for specifying the amount of clean agent required for Class A and Class B fires, but the recommendation for Class

Discriminating Between Smoldering and Flaming Fires Using Alarm Signals

January 3, 2011
Author(s)
William D. Davis
Strategies are developed that make use of signals from smoke and heat alarms to deduce conditions in a room for both flaming and smoldering fires. The issue addressed is to determine how to provide useful information to incident command for smoldering

Dynamic Properties for Modeling and Simulation of Machining: Effect of Pearlite to Austenite Phase Transition on Flow Stress in AISI 1075 Steel

January 3, 2011
Author(s)
Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak
The Pulse-Heated Kolsky Bar Laboratory at the National Institute of Standards and Technology (NIST) has been developed for the measurement of dynamic properties of metals. Because high-speed machining processes can lead to extremely rapid heating of a

Effects of Fuel Location and Distribution on Full-Scale Underventilated Compartment Fires

January 3, 2011
Author(s)
Andrew J. Lock, Cheolhong Hwang, Matthew F. Bundy, Erik L. Johnsson, Gwon H. Ko
Experimental and numerical studies were conducted to investigate the effect of fuel location and distribution on full-scale underventilated compartment fires in an ISO 9705 room. Heptane fuel was burned in three different fuel distributions: single

Geometric Magnetoresistance Mobility Extraction in Highly Scaled Transistors

January 3, 2011
Author(s)
Jason P. Campbell, Kin P. Cheung, Liangchun (. Yu, John S. Suehle, Kuang Sheng, A Oates
Geometric magnetoresistance provides a promising solution to the difficult challenges associated with channel mobility extraction in nano-scale transistors. However, this technique requires significant experimental considerations which are uncommon in most

Hotter Cements, Cooler Concretes

January 3, 2011
Author(s)
Dale P. Bentz, Casimir Bognacki, Kyle Riding, Victor Villarreal
In the past 50 years, portland cements have become progressively finer, in order to meet increasing demands for fast-track construction, etc. While finer cements produce higher early-age strengths, they also increase early-age heat release which can

Reducing Data Nonconformity in Linear Models

January 3, 2011
Author(s)
Andrew L. Rukhin
Stein phenomenon Summary Several procedures designed to reduce nonconformity in interlaboratory studies by shrinking data toward a consensus matrix weighted mean are suggested. Some of them are shown to have a smaller quadratic risk than the vector sample

Thermal Properties of High-Volume Fly Ash Mortars and Concretes

January 3, 2011
Author(s)
Dale P. Bentz, Max A. Peltz, Alejandro Duran-Herrera, P Valdez, Cesar Juarez
As sustainability moves to the forefront of construction, the utilization of high volume fly ash concrete mixtures to reduce CO2 emissions and cement consumption per unit volume of concrete placed is receiving renewed interest. Concrete mixtures in which

Variables in the Quantification of CD4 in Normals and Hairy Cell Leukemia Patients

January 3, 2011
Author(s)
Gerald E. Marti, William G. Stetler-Stevenson, Fatima Abbasi, Gregory A. Jasper, Robert J. Kreitman, Lili Wang
Background: Quantitative flow cytometry (QFCM) is being applied in the clinical flow cytometry laboratory. Quantitative normal T-cell CD4 expression represents a biologic standard and quality control agent. However, Low levels of CD4 expression were

United States Capitol Dome:Characterization of Cast and Wrought Materials

January 2, 2011
Author(s)
Christopher N. McCowan, Thomas A. Siewert, David Olson, Joseph D. McColskey
Restoration of the cast iron dome at the United States Capitol is needed because moisture is leaking into interior areas of the building due to corrosion damage. Microstructure, composition, and tensile properties of cast and wrought samples from the dome

A Compact Variable-Temperature Broadband Series-Resistor Calibration

January 1, 2011
Author(s)
Nathan D. Orloff, Jordi Mateu, Arkadiusz C. Lewandowski, Eduard Rocas, Joshua P. King, Dazhen Gu, Juan C. Collado Gomez, Ichiro Takeuchi, Xiaoli Lu, James C. Booth
We present a method to obtain a broadband on wafer calibration from 45 MHz to 40 GHz for variable temperature, which requires three standards: a thru-reflect, and series-resistor. The maximum error of this technique compared to a benchmark 9 standard

Analysis of high-Q, gallium nitride nanowire resonators in response to deposited thin films

January 1, 2011
Author(s)
J. R. Montague, M. Dalberth, J. M. Gray, D. Seghete, Kristine A. Bertness, S M. George, Victor M. Bright, Charles T. Rogers, Norman Sanford
Gallium nitride nanowires (GaN-NWs) are systems of interest for mechanical resonance-based sensors due to their small mass and, in the case of c-axis NWs, high mechanical quality (Q) factors of 10,000-100,000. We report on singly-clamped NW mechanical

Cold light from hot atoms

January 1, 2011
Author(s)
John J. Curry, G G. Lister
The introduction of rare earth atoms and molecules into lighting discharges led to great advances in efficacy of these lamps. Atoms such as Dy, Ho and Ce provide excellent radiation sources for lighting applications1, with strong radiation bands in the
Displaying 25876 - 25900 of 74176
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