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Displaying 43701 - 43725 of 143775

A Semantic Product Modeling Framework and Its Application for Behavior Evaluation

January 9, 2012

Author(s)

Jae H. Lee, Steven J. Fenves, Conrad E. Bock, Sudarsan Rachuri, Hyo-Won Suh, Xenia Fiorentini, Ram D. Sriram

Supporting different stakeholder viewpoints across the products entire lifecycle requires semantic richness to represent product related information and thus enable multi-view engineering simulations. This paper proposes a multi-level product modeling

Dynamical Arrest, Percolation, Gelation, and Glass Formation in Model Nanoparticle Dispersions with Thermoreversible Adhesive Interactions

January 9, 2012

Author(s)

Aaron Paul Rust Eberle, Ramon Castaneda-Priego, Jung M. Kim, Norman J. Wagner

We report an experimental study of the dynamical arrest transition for a model system consisting of octadecyl coated silica suspended in n-tetradecane from dilute to concentrated conditions spanning the state diagram. The dispersion's interparticle

Effect of elastic deformation on frictional properties of few-layer graphene

January 9, 2012

Author(s)

Alexander Y. Smolyanitsky, Jason P. Killgore, Vinod K. Tewary

We describe the results of Brownian dynamics (BD) simulations of an AFM tip scanned on locally suspended few-layer graphene. The effects of surface compliance and sample relaxation are directly related to the observed friction force. We demonstrate that

Monoammoniate of Calcium Amidoborane - Synthesis, Structure and Hydrogen-Storage Properties

January 9, 2012

Author(s)

Yong Shen Chua, Hui Wu, Wei Zhou, Terrence J. Udovic, Guotao Wu, Zhitao Xiong, Ming Wah Wong, Ping Chen

The monoammoniate of calcium amidoborane, Ca(NH 2BH 3) 2¿NH 3 was synthesized by ball milling an equimolar mixture of CaNH and AB. Its crystal structure has been determined and found to contain a complete dihydrogen-bonded network. Thermal decomposition

Predictive Gold Nanocluster Formation Controlled by Metal-Ligand Complexes

January 9, 2012

Author(s)

John M. Pettibone, Jeffrey W. Hudgens

The formation of ligand-protected transition metal nanoclusters in size-selective syntheses is driven by the inherent properties of the protecting ligands. We have previously reported the selective, monodisperse product formation of phosphine protected Au

An NMR-based Metabolomic Assessment of Cultured Cobia Health in Response to Dietary Manipulation

January 8, 2012

Author(s)

Tracey Johnston, Sarah Newton, Karl Brenkert, John Leffler, Dan Bearden

Aquaculture produces a significant source of protein for global human consumption. Commercial fish diets rely heavily on fishmeal and fish oil, which can be costly. Alternative protein and lipid sources may provide nutritionally improved high performance

Application of X-ray photoelectron spectroscopic analysis to protein adsorption on materials relevant to biomanufacturing.

January 5, 2012

Author(s)

Rebecca A. A. Zangmeister

The use of X-ray photoelectron spectroscopy (XPS) for the analysis of protein adsorption on materials relevant to biomanufacturing of protein drug products is explored. Details of the methods used to obtain three pieces of information about protein

Recommendations for Elevator Messaging Strategies

January 6, 2012

Author(s)

Erica D. Kuligowski, Bryan L. Hoskins

Building occupants, who have been instructed to use elevators for evacuation, and have subsequently congregated within the elevator lobby for eventual evacuation, are presented with an uncertain and potentially intimidating situation. For example, waiting

Development of Appropriate Test Markings for Optical Scan Voting Machines, Phase 2: Analysis of Ballot Markings

January 5, 2012

Author(s)

Mitch Trachtenberg

Three hundred thousand optical scan ballots cast in three United States jurisdictions have been scanned at high resolution in order to analyze voter behavior in marking ballots. Each jurisdiction uses a different vote target style: oval, box, or broken

NIST Time and Frequency Bulletin

January 5, 2012

Author(s)

Petrina C. Potts

The Time and Frequency Bulletin provides information on performance of time scales and a varieth of broadcasts (and related information) to users of the NIST services.

Performing three dimensional measurements on micro-scale features using a flexible CMM fiber probe with ellipsoidal tip

January 5, 2012

Author(s)

Balasubramanian Muralikrishnan, Jack A. Stone Jr., Craig M. Shakarji, John R. Stoup

The tip of a traditional CMM probe used for measurements of macro-scale artifacts is generally a sphere of excellent geometry. Its known diameter (from a prior calibration) and form along with the known approach direction (which is normal to the surface)

Simulation of the Dynamics of a Wind-Driven Fire in a Ranch-Style House - Texas

January 5, 2012

Author(s)

Adam M. Barowy, Daniel M. Madrzykowski

This report describes the results of calculations using the NIST Fire Dynamics Simulator (FDS) performed to provide insight on the thermal conditions that may have occurred during a wind-driven fire in a one-story ranch house on April 12, 2009 in Houston

Biology and Genetics of New Autosomal STR Loci Useful for Forensic DNA Analysis

January 4, 2012

Author(s)

John Butler, Becky Steffen

Short tandem repeats (STRs) are accordion-like regions of the human genome that vary in length (through expansion or contraction) with a core repeated DNA sequence. Forensic laboratories commonly use tetranucleotide repeats, containing a four base pair

Coverage-Dependent Morphology of PEGylated Lysozyme Layers Adsorbed on Silica

January 4, 2012

Author(s)

Sheetal S. Pai, Frank Heinrich, Adam L. Canady, Todd M. Przybycien, Robert D. Tilton

Neutron reflection was used to characterize the adsorbed layer structure for lysozyme conjugated at the N-terminus with a single perdeuterated methoxy poly(ethylene glycol) chain at the silica/water interface. Adsorbed layers were produced with two

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