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Displaying 22626 - 22650 of 74178

Determination of Low-Level Sulfur Concentrations by Isotope Dilution Multi-Collector Inductively Couple Plasma Mass Spectrometry (D-MC-ICPMS) Using 33S Spike and Internal Normalization for Mass Bias Correction

February 28, 2012
Author(s)
Jacqueline L. Mann, Robert D. Vocke Jr., William R. Kelly
An isotope dilution (ID) multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) method combined with an internal normalization approach for mass bias correction has been used to determine low-level sulfur (S) concentrations in a

Halothane Changes the Domain Structure of a Binary Lipid Membrane

February 28, 2012
Author(s)
Michael Weinrich, Hirsh Nanda, David Worcester, Charles Majkrzak, Brian B. Maranville, Sergey M. Bezrukov
X-ray and neutron diffraction studies of model lipid raft membranes demonstrate that halothane at physiological concnetrations produces redistribution of lipids between domains of different lipid types identified by different lamellar-d-spacings and

March 2012 SRM Spotlight.

February 28, 2012
Author(s)
Regina R. Montgomery
The SRM Spotlight is a newsletter published by the Measurement Services Division for users of NIST standard reference materials. The Spotlight announces new reference materials and provides information about their use. In addition, this newsletter contains

Ultra-small-Angle X-ray Scattering - X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites

February 28, 2012
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Laura Espinal, Joseph M. Antonucci, Drago Skrtic, Justin N. O'Donnell, Jan Ilavsky
The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon heating using both static, bulk measurement techniques and recently developed ultra-small angle X-ray scattering - X-ray photon correlation

A Bibliography of Ambulance Patient Compartments and Related Issues

February 27, 2012
Author(s)
Mehdi Dadfarnia, Yung-Tsun T. Lee, Deogratias Kibira
Safety in the patient compartment of ambulances is an issue of growing concern for emergency medical technicians (EMTs), paramedics, patients, and others affected by ambulances. A lot of research has been conducted by different players and much of it is

Entangled-state synthesis for superconducting resonators

February 27, 2012
Author(s)
Raymond W. Simmonds, Frederick W. Strauch, Kurt Jacobs, Douglas Onyango
We present a theoretical analysis of methods to synthesize entangled states of two superconducting resonators. These methods use experimentally demonstrated interactions of resonators with artificial atoms and offer efficient routes to generate

Guidelines for Securing Wireless Local Area Networks (WLANs)

February 27, 2012
Author(s)
Shirley M. Radack
This bulletin summarizes the information presented in NIST Special Publication (SP) 800-153, Guidelines for Securing Wireless Local Area Networks (WLANs): Recommendations of the National Institute of Standards and Technology. The publication was written by

Airflow and Indoor Air Quality Models of DOE Reference Commercial Buildings

February 24, 2012
Author(s)
Lisa C. Ng, Amy Musser, Andrew K. Persily, Steven J. Emmerich
Sixteen reference commercial buildings were defined by the U.S. Department of Energy (DOE) and created as EnergyPlus input files. They were developed for use in assessing new technologies and supporting the development of energy codes. Infiltration rates

Evaluation of Segmentation Algorithms on Cell Populations Using CDF Curves

February 24, 2012
Author(s)
Robert C. Hagwood, Javier Bernal, Michael W. Halter, John T. Elliott
Cell segmentation is a critical step in the analysis pipeline for most imaging cytometry experiments and the segmentation algorithm can effect the quantitative data derived from image analysis. Methods to evaluate segmentation algorithms are important for

Nanoscale spin wave localization using ferromagnetic resonance force microscopy

February 24, 2012
Author(s)
Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert D. McMichael
We utilize ferromagnetic resonance force microscopy (FMRFM) to generate and detect multiple localized spin wave modes with spatial dimensions less than 100 nm in ferromagnetic thin films. Localized spin waves are a potentially powerful tool for imaging

Thermoelectric Properties and Structural Variations in Bi2Te3-xSx Crystals

February 23, 2012
Author(s)
Winnie K. Wong-Ng, Howard Joress, Joshua B. Martin, Peter Zavalij, Yonggao Y. Yan, Jihui Yang
We have successfully correlated the thermoelectric properties, structure and compositional variations of a Bi2Te3-xSx single crystal using a custom-designed, non-destructive, high-throughput Seebeck coefficient screening tool, together with a single

An atomic interface between microwave and optical photons

February 22, 2012
Author(s)
Mohammad Hafezi, Zaeill Kim, Steven L. Rolston, Luis A. Orozco, Benjamin Lev, Jacob M. Taylor
A complete physical approach to quantum information requires a robust interface among flying qubits, long-lifetime memory and computational qubits. Here we present a unified interface for microwave and optical photons, potentially connecting engineerable

Modeling the Vapor Pressure of Biodiesel Fuels

February 22, 2012
Author(s)
O. Castellanos Diaz, F. Schoeggl, H.W. Yarranton, Marco Satyro, Tara Lovestead, Thomas J. Bruno
The composition, vapour pressure, and heat capacity of nine biodiesel fuels from different sources were measured. The vapour pressure of the biodiesel fuels is modeled assuming an ideal liquid phase of the fatty acid methyl esters constituting the fuel
Displaying 22626 - 22650 of 74178