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Search Publications

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Displaying 27276 - 27300 of 74066

Optimize Noise Filtration through Dynamical Decoupling

July 24, 2009
Author(s)
Hermann Uys, Michael J. Biercuk, John J. Bollinger
One approach to maintaining phase coherence of qubits through dynamical decoupling consists of applying a sequence of Hahn spin-echo pulses. Recent studies have shown that, in certain noise environments, judicious choice of the delay times between these

Quantitative Characterization of Quantum Dot-labeled Lambda Phage for Escherichia coli Detection

July 24, 2009
Author(s)
Peter Yim, Matthew L. Clarke, Michael McKinstry, Silvia H. De Paoli Lacerda, Leonard F. Pease III, Marina A. Dobrovolskaia, Hyeong G. Kang, David T. Read, Shanmuga Sozhamannan, Jeeseong C. Hwang
We rapidly and quantitatively detect biological pathogens by combining the specificity of bacteriophage lambda with the sensitivity of CdSe/ZnS quantum dot (QD)-based fluorescence. Specifically, QD-decorated lambda phages bind to and allow detection of

Two-Body Models for Analyzing Complex Impedance

July 24, 2009
Author(s)
Douglas A. Bennett, Robert D. Horansky, Joel N. Ullom
Complex impedance is an important and widely used technique for characterizing microbolometers and microcalorimeters. Often, complex impedance data from actual devices does not fit the simple one-body model of a TES microcalorimeter. In this paper we will

Overview of the Multiple Biometrics Grand Challenge

July 23, 2009
Author(s)
P J. Phillips, Patrick J. Flynn, J. R. Beveridge, Kevin W. Bowyer, W T. Scruggs, Alice O'Toole, David Bolme, Bruce A. Draper, Geof H. Givens, Yui M. Lui, Hassan A. Sahibzada, Joseph A. Scallan, Samuel Weimer
The goal of the Multiple Biometrics Grand Challenge (MBGC) is to improve the performance of face and iris recognition technology from biometric samples acquired under unconstrained conditions. The MBGC is organized into three challenge problems. Each

Moisture Attack on Adhesive Joints: Roles of Adhesive and Interface Properties

July 22, 2009
Author(s)
Donald L. Hunston, Kar T. Tan, Sushil K. Satija, Christopher C. White, Bryan D. Vogt, Cyril Clerici
It is well-known that moisture will attack many adhesive joints. A particularly interesting feature is the observation that when the moisture level in certain systems exceeds a critical concentration, the bonded joint shows a dramatic loss of strength. A

Fast and Secure CBC Type MAC Algorithms

July 21, 2009
Author(s)
Mridul Nandi
The CBC-MAC, or cipher block chaining message authentication code, is a well-known method to generate message authentication codes. Unfortunately, it is not forgery-secure over an arbitrary domain. There are several secure variants of CBC-MAC, among which

Anomalous thermal behavior in microcalorimeter gamma-ray detectors

July 20, 2009
Author(s)
Robert D. Horansky, James A. Beall, Kent D. Irwin, Joel N. Ullom
Improving the resolution of gamma-ray detectors is important for many fields, including determinations of the Lamb shift in atoms with high atomic numbers , nuclear treaty verification , and environmental monitoring. High-purity germanium detectors are

Shannon Limits for Low-Temperature Detector Readout

July 20, 2009
Author(s)
Kent D. Irwin
Information theory places constraints on multiplexing large low-temperature detector arrays. We discuss these constraints, and review the state of the art of multiplexed low-temperature detector arrays. The number of detectors read out by each output

Is spam an issue for opinionated blog post search?

July 19, 2009
Author(s)
Ian M. Soboroff, Craig Macdonald, Iadh Ounis
In opinion-finding, the retrieval system is tasked with re- trieving not just relevant documents, but those that also express an opinion towards the query target entity. This task has been studied in the context of the blogosphere by groups participating

Using 3D Head and Respirator Shapes to Analyze Respirator Fit

July 19, 2009
Author(s)
Kathryn M. Butler
A computational approach to analyzing respirator fit is demonstrated using geometries generated by laser scanning, mechanical drawings, and CAD files. Three fit-related problems that can be solved using computational tools are demonstrated: 1) The study of

A Guide to the RIA Workshop Data Archive

July 18, 2009
Author(s)
Ian M. Soboroff
During the course of the Reliable Information Access (RIA) workshop, a data archive was created to hold the outputs of the many experiments being done. This archive was designed to serve both as an organizational structure to support the researchers at the

Modification of magnetotransport properties across patterned GaMnAs nanoconstrictions by application of high current densities

July 17, 2009
Author(s)
David P. Pappas, Fabio Cesar Da Silva, Teresa Osminer, Sung Un Cho, Hyung Choi, Chan Yang, Yun Park
We report on the modification of magnetotransport properties across patterned GaMnAs nanoconstrictions by the application of high current densities (< 107 A/cm2). We observe controllable changes in the electrical resistance with the direction of the bias

The Virtual Cybernetic Building Testbed-A Building Emulator

July 16, 2009
Author(s)
Steven T. Bushby, Michael A. Galler, Natascha S. Milesi-Ferretti, Cheol D. Park
Building emulators couple computer simulations to real control hardware, creating a useful tool for studying building control system performance. The National Institute of Standards and Technology's Virtual Cybernetic Building Testbed (VCBT) is a whole

An infrared imaging high-throughput combinatorial method for investigating new phase formation and hydrogen storage capacities of thin films

July 15, 2009
Author(s)
Jason Hattrick-Simpers, Leonid A. Bendersky, Edwin J. Heilweil, H. Oguchi, Ichiro Takeuchi
We have refined and expanded on the capabilities of rapid screening, which utilizes infrared (IR) emissivity imaging. A complete procedure for using infrared emissivity to characterize the hydrogen storage properties of thin-film samples is described. The

Approaches to color rendering measurement

July 15, 2009
Author(s)
Wendy L. Davis, Yoshihiro Ohno
Color rendering refers to a light source’s ability to make the colors of illuminated objects appear natural or accurate. The Color Rendering Index (CRI) is currently the only internationally-standardized way to assess a light source’s color rendering

Coherent linear optical sampling at over 15 bits of resolution

July 15, 2009
Author(s)
Ian R. Coddington, William C. Swann, Nathan R. Newbury
Linear optical sampling characterizes a sample by measuring the distortions on a transmitted optical field, thereby quantifying the sample's optical response. By exploiting the high mutual coherence between two phase-locked femtosecond fiber lasers, we

Degradation and Nanofiller Release of Polymer Nanocomposites Exposed to UV

July 15, 2009
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Alexander J. Shapiro, Xiaohong Gu, Joannie W. Chin
Nanofillers are increasingly used to enhance multifunctional properties of polymers. However, recent research suggests that nanomaterials may have a negative impact on the environmental health and safety. Since polymers are susceptible to photodegradation

Estimating Volumes of Simulated Lung Cancer Nodules

July 15, 2009
Author(s)
David E. Gilsinn, Bruce R. Borchardt, Amelia Tebbe
Lung cancer is a disease of uncontrolled cell growth in tissues of the lung. Computed tomography (CT) shows promise in detecting lung cancers at earlier, more operable stages, when survival is better. CT scans generate multiple 2-D slice images of the lung
Displaying 27276 - 27300 of 74066