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Displaying 21151 - 21175 of 74053

Radiation Studies of Spin-transfer Torque Materials and Devices

August 15, 2013
Author(s)
H. L. Hughes, Konrad Bussmann, Shu-Fan Cheng, Robert D. Shull, Andrew P. Chen, S. Schafer, T. Mewes, A. Ong, E. N. Chen
Spin-transfer torque film stacks and devices having in-plane magnetization were irradiated using a cobalt-60 gamma source. The film stacks have a biased, synthetic antiferromagnet spin-valve architecture. Measurements of magnetization vs. field

Segmented chirped-pulse Fourier transform submillimeter spectroscopy for broadband gas analysis

August 15, 2013
Author(s)
Justin L. Neill, Brent J. Harris, Amanda L. Steber, Kevin O. Douglass, David F. Plusquellic, Brooks H. Pate
Chirped-pulse Fourier transform spectroscopy has recently been extended to millimeter wave spectroscopy as a technique for the characterization of room-temperature gas samples. Here we present a variation of this technique that significantly reduces the

Economics of the U.S. Additive Manufacturing Industry

August 14, 2013
Author(s)
Douglas Thomas
There is a general concern that the US manufacturing industry has lost competitiveness with other nations. Additive manufacturing may provide an important opportunity for advancing US manufacturing while maintaining and advancing US innovation. Additive

Pulmonary and Cardiovascular Responses of Rats to Inhalation of Silver Nanoparticles

August 14, 2013
Author(s)
Jenny R. Roberts, Walt McKinney, Hong Kan, Kristine Krajnak, David G. Frazer, Treye Thomas, Stacey Waugh, Allison Kenyon, Robert I. MacCuspie, Vincent A. Hackley, Vincent Castranova
Rats were exposed by inhalation to filtered air or to a low (100 ug/m3 using a commercial antimicrobial product [20 mg/L silver]) or high (1000 ug/m3 using a suspension [200 mg/L silver] synthesized to have a similar size distribution) concentration of

Biometric Face Recognition: From Classical Statistics to Future Challenges

August 13, 2013
Author(s)
P J. Phillips, Geof H. Givens, J. R. Beveridge, Bruce A. Draper, David Bolme, Yui M. Lui
Automated face recognition has moved from science fiction to reality during the last twenty years. For high quality frontal face images, recognition errors have been cut in half every two years as more sophisticated algorithms are developed. Algorithms and

Correlation Coefficient and Loading Effects for MIMO Antennas in a Reverberation Chamber

August 13, 2013
Author(s)
Nick Janssen, Kate Remley, Christopher L. Holloway, William F. Young
The correlation coefficient is a common metric for assessing the performance of an antenna for a multiple-input, multiple-out wireless device. In this paper, the effect of loading a reverberation chamber on the calculation of the correlation coefficient is

Energy Metrics for Product Assembly Equipment and Processes

August 13, 2013
Author(s)
Shaw C. Feng, FNU Kumaraguru, Christopher U. Brown, Boonserm Kulvatunyou
A key factor deciding the capacity to increase the sustainability of final products is the energy efficiency. The energy embodied in a product is an aggregation of all of the energy embodied in the products' components and subsystems, expended through its

Integration of Energy Information for Product Assembly and Logistics Processes

August 13, 2013
Author(s)
Shaw C. Feng, FNU Kumaraguru, Kincho H. Law, Kyeong Rim Ahn
This paper presents an on-going effort at NIST to model the energy performance in assembly and supply chain processes as a part of a larger sus-tainability improvement goal. Energy performance modeling comprises two dis-tinct metrics like energy

Measurement Uncertainty in Cell Image Segmentation Data Analysis

August 13, 2013
Author(s)
Jin Chu Wu, Michael W. Halter, Raghu N. Kacker, John T. Elliott, Anne L. Plant
Cell image segmentation is a part of quantitative studies regarding cell movement and cell behavior, and it plays a critical role in molecular biology and cellular biochemistry. Therefore, it is fundamentally important to evaluate the performance levels of

Status and Opportunities to Support Product Category Rules in the U.S.

August 12, 2013
Author(s)
Rita Schenck
Environmental Product Declarations (EPDs) are a kind of ecolabel that discloses the environmental impacts of a product over its life cycle, using the science of life cycle assessment. EPDs hold out the promise of supporting science based decisions in

Temperature-Programmed Electrospray-Differential Mobility Analysis for Characterization of Ligated Nanoparticles in Complex Media

August 12, 2013
Author(s)
De-Hao D. Tsai, Frank W. DelRio, John M. Pettibone, Pin A. Lin, Jiaojie Tan, Michael R. Zachariah, Vincent A. Hackley
In this study, an electrospray-differential mobility analyzer (ES-DMA) was operated with an aerosol flow-mode, temperature-programmed approach to enhance its ability to characterize the particle size distributions (PSDs) of nanoscale particles (NPs) in the

Through-focus scanning optical microscopy for defect inspection of EUV masks

August 12, 2013
Author(s)
Ravikiran Attota, Vibhu Jindal
The TSOM method provides three-dimensional nanoscale metrology using a conventional optical microscope. Substantial improvements in defect detectability using the TSOM method will be presented. The TSOM method shows potential to (i) detect phase defects on

Evaluating Feedback Systems for Residential Building Energy Monitoring

August 10, 2013
Author(s)
Wenqi Guo, Tania Ullah, MengChu Zhou
Rising global energy demand, increasing electricity prices, and the limitation of natural resources have led to increased interest in energy monitoring of residential buildings. Much research has been done to examine the effect of energy use feedback to

Multilingual Summarization: Dimensionality Reduction and a Step Towards Optimal Term Coverage

August 9, 2013
Author(s)
Yi-Kai Liu, John M. Conroy, Sashka T. Davis, Jeff Kubina, Dianne P. O'Leary, Judith D. Schlesinger
In this paper we present three term weighting approaches for multi-lingual document summarization and give results on the DUC 2002 data as well as on the 2013 Multilingual Wikipedia feature articles data set. We introduce a new interval-bounded nonnegative

On the Link Between Insertion Loss and Lower Bound of Efficiency

August 9, 2013
Author(s)
Levon Barsikyan, Jason Coder, Mark Golkowski, John M. Ladbury
We investigate the effect of chamber loss on the recently developed 2-port antenna model and the associated method of determining antenna efficiency. The loss in the reverberation chamber was controlled using microwave absorbing foam creating four
Displaying 21151 - 21175 of 74053
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