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Displaying 24551 - 24575 of 73970

Nucleation and Growth of Freshly-Formed Particles from Limonene Ozonolysis

August 30, 2011
Author(s)
Chi P. Hoang, Dong H. Rim, Lance L. Wallace, Andrew K. Persily
In building environments, oxidation reactions involving ozone and terpenoids lead to nano-sized particle formation [Jang et al. 1999]. Low volatility products of these reactions are important and add to particle mass concentrations in air through

Ventilation Measurements in IAQ Studies: Problems and Opportunities

August 30, 2011
Author(s)
Andrew K. Persily, Hal Levin
Building and space ventilation rates are primary determinants of indoor pollutant levels and occupant exposures, and the impacts of ventilation on health and comfort have long been recognized in ventilation standards and regulations. Despite the importance

DIFFUSION-CONTROLLED REFERENCE MATERIAL FOR VOC EMISSIONS TESTING

August 29, 2011
Author(s)
Zhe Liu, Cynthia H. Reed, Steve Cox, John Little
To improve the reliability and accuracy of tests used to measure emissions of volatile organic compounds (VOCs) from samples of interior building products, the National Institute of Standards and Technology (NIST) and Virginia Tech (VT) have created a

Indoor Air Quality in Energy Efficient Buildings

August 29, 2011
Author(s)
Andrew K. Persily, Steven J. Emmerich
Building energy efficiency has been an important goal for decades. Since the energy crisis of the 1970s, much has been learned about how to improve energy efficiency in buildings. More recently, given increases in energy costs and concerns about the

Terahertz metrology and instrumentation

August 29, 2011
Author(s)
Erich N. Grossman, Zoya Popovic
This paper gives an overview of measurement techniques used in the THz region of the electromagnetic spectrum, from about 100 GHz to several THz. Currently available components necessary for THz metrology, such as sources, detectors and passives, are

The NIST EUV facility for advanced photoresist qualification using the witness-sample test

August 29, 2011
Author(s)
Steven E. Grantham, Charles S. Tarrio, Shannon B. Hill, Lee J. Richter, J. van Dijk, C. Kaya, N. Harned, R. Hoefnagels, M. Silova, J. Steinhoff
Before being used in an extreme-ultraviolet (EUV) scanner, photoresists must first be qualified to ensure that they will not excessively contaminate the scanner optics or other parts of the vacuum environment of the scanner. At the National Institute of

Validation of Uniaxial Data Beyond Uniform Elongation

August 29, 2011
Author(s)
Mark A. Iadicola
Uniaxial testing is one of the simplest methods used to determining mechanical properties for sheet metals, but the classic test does not determine properties to sufficiently high strain levels for use in models of very large deformations such as forming

Characterizing the Mechanical Properties and Degradation of Thin Polymer Membranes

August 28, 2011
Author(s)
Christopher M. Stafford, Jun Y. Chung, Junghyun Lee
The elasticity, strength, and toughness of thin polymer membranes are of considerable interest since direct knowledge of these key mechanical properties can provide insight into performance, durability, and underlying degradation mechanisms that occur over

Development of a Candidate Reference Measurement Procedure for the Determination of Phenytoin, Phenobarbital, Lamotrigine, and Topiramate in Human Serum Using Isotope-Dilution Liquid Chromotography/Tandem Mass Spectrometry

August 28, 2011
Author(s)
Susan Tai, Karen W. Phinney, Chia-Yi Yeh
Phenytoin (PHT), phenobarbital (PHB), lamotrigine (LTG), and topiramate (TPM) are some of the most widely used antiepileptic drugs (AEDs). Monitoring of their concentrations in serum is important for the treatment of epilepsy. A candidate reference

Modeling electromigration using the peridynamics approach

August 28, 2011
Author(s)
David T. Read, Walter Gerstle, Vinod K. Tewary
This chapter presents a summary of the information and reasoning needed to justify learning about peridynamics for the purpose of analyzing electromigration and provides guidance for the development of a complete peridynamics analysis. The additions needed

Fracture of X100 Pipeline Steel: Combined Experimental-Numerical Process

August 26, 2011
Author(s)
Mordechai Szanto, Christopher N. McCowan, Elizabeth S. Drexler, Joseph D. McColskey
Accurate characterization of material fracture properties is necessary for reliable numerical prediction of rupture in gas pipelines. In the current work the ductile fracture properties for high strength X100 pipeline steel, was evaluated, using

Magnetic Order of the Hexagonal Rare Earth Manganite Dy 0.5 Y 0.5 MnO 3

August 26, 2011
Author(s)
Joel Helton, Deepak Singh, Harikrishnan S. Nair, Suja Elizabeth
Hexagonal Dy 0.5Y 0.5MnO 3, a multiferroic rare earth manganite with geometrically frustrated antiferromagnetism, has been investigated with neutron diffraction measurements. Below 2.4 K magnetic order is observed on both the Mn (antiferromagnetic) and Dy

Effect of Regioregularity on the Semicrystalline Structure of Poly(3-hexylthiophene

August 25, 2011
Author(s)
Chad R. Snyder, Dean M. DeLongchamp, Jessica S. Henry
The impact of regioregularity in poly(3-hexylthiophene-2,5-diyl) (P3HT) on crystallization behavior and quantitative limits to possible crystal sizes is discussed, and it is explained why regioregularities must be reported for any study to be properly

Spin Dependent Charge Pumping in SiC Metal-Oxide-Semiconductor Field-Effect-Transistors

August 25, 2011
Author(s)
Brad Bittel, Patrick Lenahan, Jason Ryan, Jody Fronheiser, Aivars Lelis
We demonstrate a very powerful electrically detected magnetic resonance (EDMR) technique, spin dependent charge pumping (SDCP) and apply it to 4H SiC metal-oxide-semiconductor field-effect-transistors (MOSFETs). SDCP combines a widely used electrical
Displaying 24551 - 24575 of 73970
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