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Displaying 43026 - 43050 of 143797

Dielectrophoretic Cell Capture on Polyester Membranes

April 2, 2012

Author(s)

Conni Hanke, Petra S. Dittrich, Darwin Reyes-Hernandez

A new system for dielectrophoretic cell capture on porous polyester (PET) membranes is presented. Conventional photolithographic techniques were used to fabricate gold microelectrodes on a PET membrane. We characterized these electrodes to proof that there

Direct Observation of Activated Hydrogen Binding to a Supported Organometallic Compound at Room Temperature

April 2, 2012

Author(s)

Jason M. Simmons, Taner Yildirim, Ahmad Hamaed, David M. Antonelli, Michael I. Webb, Charles J. Walsby

Supported transition metal complexes have been proposed as a means of achieving room temperature hydrogen storage via Kubas interactions, however there is little experimental evidence as yet to justify such predictions in real materials. Using a

Microscopy of Clinker and Hydraulic Cements

April 2, 2012

Author(s)

Paul E. Stutzman

Paramagnetic Spin Correlations in Colossal Magnetoresistive La 0.7 Ca 0.3 MnO 3

April 2, 2012

Author(s)

Joel Helton, Matthew B. Stone, Dmitry A. Shulyatev, Yakov M. Mukovskii, Jeffrey W. Lynn

Neutron spectroscopy measurements reveal dynamic spin correlations throughout the Brillouin zone in the colossal magnetoresistive system La 0.7Ca 0.3MnO 3 at 265 K ({approx}1.03T c). The long-wavelength behavior is consistent with spin diffusion, yet an

Seismic Damage and Fragility Analysis of Structures With Tuned Mass Dampers Based on Plastic Energy

April 2, 2012

Author(s)

Kevin K. Wong, John L. Harris

The effectiveness of using a tuned mass damper (TMD) to improve a structures ability to dissipate earthquake input energy is investigated through the use of seismic fragility curves. Nonlinear material behavior of the structure is captured using the Force

Workflow and Electronic Health Records in Small Medical Practices

April 2, 2012

Author(s)

Mala Ramaiah, Eswaran Subrahmanian, Ram D. Sriram, Bettijoyce B. Lide

This paper analyzes the workflow and implementation of electronic health record (EHR) systems across different functions in small physician offices. We characterize the differences in the offices based on the levels of computerization in terms of workflow

A Comparison of 12 US Liquid Hydrocarbon Flow Standards and the Transition to Safer Calibration Liquids

April 1, 2012

Author(s)

John D. Wright, Aaron N. Johnson, Gina M. Kline, Christopher J. Crowley, Jodie G. Pope, Vern E. Bean

During 2010 and 2011, NIST piloted a 12-laboratory comparison of hydrocarbon liquid flow calibration standards spanning the range 3.8 L/min to 38 L/min. The laboratories were in mutual agreement within the expected 0.3 % uncertainty, which is approximately

A Life-Cycle Cost Comparison of Exit Stairs and Occupant Evacuation Elevators in Tall Buildings

April 1, 2012

Author(s)

David T. Butry, Robert E. Chapman, Allison L. Huang, Douglas S. Thomas

Recent changes in the International Building Code (IBC) require a third exit stair for buildings in excess of 420 ft (128 m) high. Additionally, the new code provision allows for occupant evacuation elevators (OEE) to be used as an alternative to the third

An Overview of the Theory and Applications of Metasurfaces: The Two-Dimensional Equivalents of Metamaterials

April 1, 2012

Author(s)

Christopher L. Holloway, Edward E. Kuester, Joshua A. Gordon, James C. Booth, John Ohara, D Smith

Metamaterials are typically engineered by arranging a set of small scatterers or apertures in a regular array throughout a region of space, thus obtaining some desirable bulk electromagnetic behavior. Often the desired property is one that is not normally

Determination of the Persistence Length of Helical and Non-Helical Polypeptoids in Solution

April 1, 2012

Author(s)

Adrianne M. Rosales, Hannah K. Murnen, Steven R. Kline, Ronald N. Zuckermann, Rachel A. Segalman

Estimating Common Mean and Heterogeneity Variance in Two Study Case Meta-Analysis

April 1, 2012

Author(s)

Andrew L. Rukhin

The relative behavior of estimators of the common mean and of the heterogeneity variance in the simplest random effects model of meta-analysis is explored. A simple estimator improving on the DerSimonian-Laird procedure is derived.

Measurements, Standards, and Data In Support of Sustainable Materials and Materials-Related Technologies

April 1, 2012

Author(s)

Dianne L. Poster, Michael J. Fasolka, Richard R. Cavanagh, Ellyn S. Beary

Industry is increasingly aware that sustainability combines environmental, societal, and economic considerations in product development and that this linkage, while driving improved performance, can pose both a business opportunity and a challenge. On the

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