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Displaying 28226 - 28250 of 73697

Building Occupant Safety Research 2008

June 12, 2009
Author(s)
Richard D. Peacock, Jason D. Averill, Erica D. Kuligowski, Richard W. Bukowski
Historically, building egress systems have evolved in response to specific large loss incidents. Currently, systems are designed around a concept of providing stair capacity for the largest occupant load floor in the building with little or no

CHALLENGES AND SUCCESS FOR NEUTRON ACTIVATION ANALYSIS PROCEDURES IN VALUE ASSIGNMENT OF ANIMAL SERUM AND BOVINE LIVER STANDARD REFERENCE MATERIALS

June 12, 2009
Author(s)
Rolf L. Zeisler, Robert R. Greenberg, Elizabeth A. Mackey, Karen E. Murphy, Rabia Oflaz, Bryan E. Tomlin
Analyses for value assignment in the renewal SRMs 1598a Animal Serum and SRM 1577c Bovine Liver included extensive characterization by neutron ac-tivation analysis (NAA). For the determination of Al, V, Mn, and Cu the inter-fering reaction 31P(n,alpha)28Al

Model for Thermodynamic Properties of a Biodiesel Fuel

June 12, 2009
Author(s)
Marcia L. Huber, Eric W. Lemmon, Andrei F. Kazakov, Lisa S. Ott, Thomas J. Bruno
We present an equation-of-state approach to modeling the thermodynamic properties of a biodiesel fuel. Preliminary Helmholtz-type equations of state were developed with limited experimental data for five fatty acid methyl esters (FAMEs) that are primary

Optimal Surface-Electrode Trap Lattices for Quantum Simulation with Trapped Ions

June 12, 2009
Author(s)
Roman Schmied , Janus H. Wesenberg, Dietrich Leibfried
Trapped ions offer long internal state (spin) coherence times and strong inter-particle interactions mediated by the Coulomb force. This makes them interesting candidates for quantum simulation of coupled lattices. To this end it is desirable to be able to

Practical Applications of Nonlinear Measurements

June 12, 2009
Author(s)
Catherine A. Remley
We discuss the limitations of vector network analyzers in the measurement of nonlinear devices and circuits, including their inability to measure the relative phase between frequency components and the actual impedance in which a device is embedded. The

Stairwell Evacuation from Buildings: What We Know We Don't Know

June 12, 2009
Author(s)
Richard D. Peacock, Jason D. Averill, Erica D. Kuligowski
Occupant descent down stairwells during building evacuations is typically described by measureable engineering variables such as stairwell geometry, speed, density, and pre-evacuation delay. In turn, predictive models of building evacuation use these

Ultra-small-angle X-ray scattering at the Advanced Photon Source

June 12, 2009
Author(s)
Pete R. Jemian, Jan Ilavsky, Andrew J. Allen, Fan Zhang, Lyle E. Levine, Gabrielle G. Long
The design and operation of a versatile ultra-small-angle X-ray scattering (USAXS) instrument at the Advanced Photon Source (APS) at Argonne National Laboratory are presented. The instrument is optimized for the high brilliance and low emittance of an APS

Probing the Growth and Aging of Colloidal Cobalt Nanoparticles

June 11, 2009
Author(s)
Guangjun Cheng, Cindi L. Dennis, Robert D. Shull, Angela R. Hight Walker
We have combined transmission electron microscopy (TEM) and magnetic measurements to characterize the growth of colloidal cobalt (Co) nanoparticles during synthesis and their subsequent stability in air. During the growth, TEM measurements have shown the

Backbone Construction for Heterogeneous Wireless Ad Hoc Networks

June 10, 2009
Author(s)
Yi Qian, Hui Guo, Nader Moayeri, Kejie Lu
In this paper, we propose a backbone construction scheme over heterogeneous ad hoc networks, where the network nodes have different characteristics such as communication capacity, processing power and energy resource. Most of the wireless backbone

Selective Binding of RNAse B Glycoforms by Polydopamine-immobilized Concanavalin A

June 10, 2009
Author(s)
Todd A. Morris, Alexander W. Peterson, Michael J. Tarlov
Glycoanalysis is important in the manufacture and quality control of protein therapeutics. An emerging method for glycoanalysis is the use of lectin arrays. Critical to the performance of these arrays is the immobilization of the lectin molecules

Time-Domain Free-Field Measurements of the Relative Permittivity of Building Materials

June 10, 2009
Author(s)
Chriss A. Grosvenor, Robert Johnk, James R. Baker-Jarvis, Michael D. Janezic, Billy F. Riddle
Free-field measurements were made on several materials using dual-ridged guide antennas and 1 m x 1 m samples placed on an optical table loaded with absorber. The samples were polycarbonate, gypsum, plywood, a brick wall, and a concrete wall. This paper

3D Imaging of Diatoms with Ion-abrasion Scanning Electron Microscopy

June 9, 2009
Author(s)
Keana C. Scott, Mark Hildebrand, Sang Kim, Dan Shi, Sriram Subramaniam
Ion-abrasion scanning electron microscopy (IASEM) takes advantage of focused ion beams to abrade thin sections from the surface of bulk specimens, coupled with SEM to image the surface of each section, enabling 3D reconstructions of subcellular
Displaying 28226 - 28250 of 73697
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