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Displaying 25251 - 25275 of 73697

Manipulation of adhesion via sub-surface patterning

February 13, 2011
Author(s)
John A. Howarter, Peter M. Johnson, Jun Y. Chung, Christopher Stafford
The delamination characteristics of patterned and hierarchical interfaces are of great interest due to the advanced adhesion capabilities found with many biological surfaces. Using nature-inspired design principles, micro- and nanostrucutred surfaces have

OCT For Depth Detection of Buried Particles in Polymeric Materials

February 13, 2011
Author(s)
Robert C. Chang, Anant Agrawal, Peter M. Johnson, Christopher Stafford
In this work, we demonstrate a method to produce novel optical phantoms usable for the characterization of OCT axial resolution and contrast. By varying the diameter of the microspheres and the thickness of the polymer layers, different spatial frequencies

Rapid, high resolution frequency comb measurements

February 13, 2011
Author(s)
Ian R. Coddington, Fabrizio R. Giorgetta, Esther Baumann, William C. Swann, Nathan R. Newbury
Frequency combs serve as an extremely high accuracy reference across broad portions of the optical spectrum. Dual frequency combs harness this accuracy and allow for fast and highly flexible measurements of passive and active sources.

Interactions of Ba2YCu3O6+x with SrTiO3 Substrate

February 12, 2011
Author(s)
Winnie K. Wong-Ng, Zhi Yang, James A. Kaduk, Lawrence P. Cook, Shailee P. Diwanji, Christopher E. Lucas
This paper describes the crystal chemistry and crystallography of products of the interaction of Ba2YCu3O6+x with the SrTiO3 buffer, which is a model system for coated conductors. A systematic study of the chemical interactions of Ba2YCu3O6+y and SrTiO3

Differential Light Shift Cancellation in a B-Field Insensitive Transition of 87Rb

February 11, 2011
Author(s)
Radu S. Chicireanu, Karl D. Nelson, Steven M. Olmschenk, Nathan Lundblad, A. Derevianko, James V. Porto
We demonstrate substantial cancellation of the differential light shift of a magnetic-field-insensitive microwave hyperfine (clock) transition in 87Rb atoms trapped in an optical lattice. Up to 95.5% of the differential light shift is cancelled while

Quantifying Model Error

February 11, 2011
Author(s)
Kevin B. McGrattan, Blaza Toman
A methodology is proposed for reporting the results of fire model validation studies that consist mainly of comparisons of model predictions and experimental measurements. The difference between the two is a combination of model error and experimental

A Comparative Analysis of Cascade Measures for Novelty and Diversity

February 10, 2011
Author(s)
Ian M. Soboroff, Charles L. Clarke, Nick Craswell, Azin Ashkan
Traditional editorial effectiveness measures, such as nDCG, remain standard for Web search evaluation. Unfortunately, these traditional measures can inappropriately reward re- dundant information and can fail to reflect the broad range of user needs that

A simple approach for selective crystal growth of Na8Si46 and Na24Si136

February 10, 2011
Author(s)
Winnie K. Wong-Ng, S Stefanoski, Peter Zavalij, George S. Nolas, Beekman Mathew
During the studies of structure/property relationships of thermoelectric intermetallic clathrates, we found that while single crystals for representative clathrates are readily grown using established techniques or flux synthesis, crystal growth of many

System-independent assessment of OCT axial resolution with a bar chart phantom

February 10, 2011
Author(s)
Robert C. Chang, Jeeseong Hwang, Christopher M. Stafford, Anant Agrawal, T. Joshua Pfefer, Megan Connors
We present a novel optical phantom approach for the characterization of OCT axial resolution and contrast via multilayered “bar charts.” We explored two methods to fabricate these phantoms: the first is based on a combinatorial methods approach from

Who is Who? Biometrics provides answers for public and private sectors

February 10, 2011
Author(s)
Fernando L. Podio
One of the critical issues related to secured Information Technology (IT) systems and applications is the verification of the users identity. Biometrics provides for secure transactions, positive identification and augmentation to human judgment. For

Comparison of the Sensitivity and Image Contrast in Spontaneous Raman and Coherent Stokes Raman Scattering Microscopy of Geometry Controlled Samples

February 9, 2011
Author(s)
Hyun M. Kim, Chris A. Michaels, Garnett W. Bryant, Stephan J. Stranick
We experimentally compare the performance and contrast differences between spontaneous and coherent Stokes Raman scattering microscopy. We demonstrate the differences on a series of geometry controlled samples that range in complexity from a point (array

Gradient Solvent Vapor Annealing of Block Copolymer Thin Films Using a Microfluidic Mixing Device

February 9, 2011
Author(s)
Kathryn L. Beers, Michael J. Fasolka, Julie N. Albert, Timothy D. Bogart, Ronald L. Lewis, J. Brian Hutchison, Bryan D. Vogt, Thomas H. Epps
Solvent vapor annealing (SVA) with solvent mixtures is a promising approach for controlling block copolymer thin film self-assembly. In this work, we present the design and fabrication of a solvent-resistant microfluidic mixing device to produce discrete

Internal Curing: A 2010 State-of-the-Art Review

February 9, 2011
Author(s)
Dale P. Bentz, Jason Weiss
The American Concrete Institute in 2010 defined internal curing as supplying water throughout a freshly placed cementitious mixture using reservoirs, via pre-wetted lightweight aggregates, that readily release water as needed for hydration or to replace

Semantic-based Optimal XML Schema Matching: A Mathematical Programming Approach

February 9, 2011
Author(s)
Jaewook Kim, Yun Peng, Nenad Ivezic, Jun H. Shin
We propose a novel solution for semantic-based XML schema matching, taking a mathematical programming approach. This method identifies the globally optimal solution for the problem of matching two XML schemas by reducing the tree-to-tree matching problem

Arithmetic Progressions on Edwards Curves

February 8, 2011
Author(s)
Dustin Moody
We look at arithmetic progressions on elliptic curves known as Edwards curves. By an arithmetic progression on an elliptic curve, we mean that the x-coordinates of a sequence of rational points on the curve form an arithmetic progression. Previous work has
Displaying 25251 - 25275 of 73697
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