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Search Publications

NIST Authors in Bold

Displaying 71651 - 71675 of 74461

A Bell Inequality for a Class of Multilocal Ring Networks

Author(s)
Michael R. Frey
Quantum networks with independent sources of entanglement (hidden variables) and nodes that execute joint quantum measurements can create strong quantum correlations spanning the breadth of the network. Understanding of these correlations has to the

A Strategy for Testing Hardware Write Block Devices

Author(s)
James R. Lyle
There is a critical need in the law enforcement community to ensure the reliability of computer forensic tools. A capability is required to ensure that forensic software tools consistently produce accurate and objective test results. The goal of the

Advanced Digital Image Archival System Using MPEG Technologies

Author(s)
Wo L. Chang
Digital information and records are vital to the human race regardless of the nationalities and eras in which they were produced. Digital image contents are produced at a rapid pace from cultural heritages via digitalization, scientific and experimental

An Analysis Framework and Additive Software Analysis

Author(s)
Paul E. Black
We present a framework for software assurance, in addition to an additive software analysis approach. Both have the potential to dramatically reduce software vulnerabilities within the next seven years. The framework (1) aggregates tool outputs, (2) allows

An Automated Acoustic System to Monitor and Classify Birds

Author(s)
C. Kwan, K C. Ho, G. Mei, Y Li, Z. Ren, R. Xu, Y. Zhang, R. Lao, M. Stevenson, Vincent M. Stanford, C. Rochet
This paper presents a novel bird monitoring and recognition system in noisy environments. The project objective is to avoid bird strikes to aircraft. First, a cost effective microphone dish concept (microphone array with many concentric rings) is presented

Anomalous damping of excitations in a collisionless dipolar Bose gas

Author(s)
Stefan Natu, Ryan M. Wilson
We present a theory for the Landau damping of low energy quasi-particles in a collisionless, quasi- 2D dipolar Bose gas and produce expressions for the damping rate in uniform and non-uniform systems. In the homogeneous system, we find that the nature of

Buckling of steel gusset plates

Author(s)
Chiara Crosti, Dat Duthinh
As a result of the structural failure of the I-35W bridge in Minneapolis in 2007, FHWA issued guidelines for the load rating of gusset plates and recommended that the capacity of these plates on non-load-path-redundant steel truss bridges be verified. The

Characterizing and Fractionating Native Cellulose Nanofibers

Author(s)
Iulia A. Sacui, Jeffrey W. Gilman
Cellulose nanofibers have good elastic modulus properties and can be used as nano-reinforcements in polymer composites. Native cellulose nanofibers from wood, Tunicate, and bacteria (Acetobacter xylium) were characterized by atomic force microscopy (AFM)

Coercivities Above 10 kOe in CoPd Superlattices

Author(s)
William F. Egelhoff Jr., Cedric J. Powell, L Gan, P J. Chen, H Ettedgui, D Tirosh, Robert D. McMichael, Mark D. Stiles, J Mallett, Alexander J. Shapiro, John E. Bonevich, J H. Judy, Erik B. Svedberg, A. E. Berkowitz
We have achieved excellent grain isolation in CoPd superlattices by using 10 nm Au as both an underlayer and an overlayer and diffusing Au into the grain boundaries by annealing for {approximately equal to} 30 min. at 300 degrees C. The grain isolation

Coexistence calculation using the Isothermal-Isochoric Integration Method

Author(s)
Seyed M. Razavi, Richard A. Messerly, J. R. Elliott
In this work, an isothermal-isochoric integration (ITIC) method is proposed and tested as a viable method for vapor pressure calculation by molecular simulation. Several tests were carried out to validate the method which resulted in less than 1 %

Colliding Self-Assembly Waves in Organosilane Monolayers

Author(s)
K Efimenko, Ali Ozcam, Jan Genzer, Daniel A. Fischer, Frederick R. Phelan Jr., Jack F. Douglas
Colliding autocatalytic wave-fronts of organosilane (OS) layer self-assembly are generated through the controlled positioning of sources of the volatile OS material at the edges of a silica wafer and through adjustment of the container dimensions in which

Common Metrics for Human-Robot Interaction

Author(s)
Aaron Steinfeld, Terrance Fong, David Kaber, Michael Lewis, Jean C. Scholtz, Alan Schultz, Michael Goodrich
This paper describes an effort to identify common metrics for task-oriented human-robot interaction (HRI). We begin by discussing the need for a toolkit of HRI metrics. We then describe the framework of our work and identify important biasing factors that

Details of the 1998 Watt Balance Experiment Determining the Planck Constant

Author(s)
Richard L. Steiner, David B. Newell, Edwin R. Williams
The National Institute of Standards and Technology (NIST) watt balance experiment completed a determination of Planck's constant in 1998 with a relative standard uncertainty of 87 x 10-9 (k = 1), concurrently with an upper limit on the drift rate of the SI

Determination of Sulfur and Sulfate Half-ester Content in Cellulose Nanocrystals: An Interlaboratory Comparison

Author(s)
Linda Johnston, Zygmun Jakubek, Stephanie Beck, Jun Arak, Emily Cranston, Christoph Danumah, Douglas Fox, Li Haifeng, Zoltan Mester, Audrey Moores, Savelas A. Rabb, Karen E. Murphy, Chady Stephan
Charged functional groups on the surface of cellulose nanocrystals (CNCs) are important for controlling the colloidal stability of suspensions and the interaction of the material with its environment for most applications. Quantification of surface groups

Development of a miniature radiation pressure-measuring microscale

Author(s)
Ivan Ryger, Alexandra B. Artusio-Glimpse, Paul A. Williams, Nathan A. Tomlin, Michelle S. Stephens, Matthew T. Spidell, John H. Lehman
Traditional methods for accurate measurement of high-power lasers involve total absorption of the laser light [1]. Our method, however, measures photon pressure exerted on a mirror without obstruction of the laser beam. The technique enables in situ

dint u say that: Digital Discourse, Digital Natives and Gameplay

Author(s)
Theresa O'Connell, John D. Grantham, Wyatt Wong, Kevin Workman, Alexander Wang
Traditional, new and modified discourse analysis methods were applied to a corpus of 858 discrete gameplay discourse events disclosing discourse characteristics during collaborative problem solving. Four teams of four digital natives each played

Direct Synthetic Control over the Size, Composition, and Photocatalytic Activity of Octahedral Copper Oxide Materials: Correlation between the Surface Structure and Catalytic Functionality

Author(s)
Nicholas M. Bedford, Michelle A. Nguyen, Yang Ren, Robert C. Goodin, Fatima Chagani, Elsayed M. Zahran, Leonidas G. Bachas, Marc Knecht
Here, we report a synthetic approach to form octahedral Cu2O microcrystals with a tunable edge length and demonstrate their use as catalysts for the photodegradation of aromatic organic compounds. Varying the ratio and concentrations of Cu2+ and reductant

Dynamic Calibration for Instruments

Author(s)
Robert C. Hagwood
The NIST Pressure Measurements Division provides calibration service for pressure instruments that customers in turn use to calibrate other instruments. Often during their useable lifetime, these instruments are calibrated and recalibrated several times at

Dynamics of DNA in and Around a Nanopore

Author(s)
Robert C. Hagwood
Single stranded DNA is modeled as a flexible polymer. The motion of such DNA in a vessel partitioned by a membrane containing a cylindrical nanopore is modeled. Statistical quantities such as the probability that a polymer end is at the pore entrance at
Displaying 71651 - 71675 of 74461
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