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NIST Authors in Bold

Displaying 21326 - 21350 of 73830

A Generative Model for Fingerprint Minutiae

June 4, 2013
Author(s)
Melissa K. Taylor, Nicholas G. Paulter Jr., Qijun Zhao, Yi Zhang, Anil K. Jain
Fingerprint minutiae are the most important features used by latent fingerprint examiners, as well as in automated fingerprint recognition systems. Hence, understanding the statistical distribution of minutiae is essential in many fingerprint recognition

A REFERENCE MEASUREMENT SYSTEM FOR ELECTROSHOCK WEAPONS

June 3, 2013
Author(s)
Nicholas G. Paulter Jr., Donald R. Larson
We have developed a measurement system to accurately measure the electrical current and high-voltage output of electroshock weapons (ESW) that are used to deliver an electrical stimulus to humans for the purpose of incapacitation. Since the output of

Dynamic Response of Metals Subject to Rapid DC Current Pulses

June 3, 2013
Author(s)
Steven P. Mates, Graham Cullen, Eran Vax, Eli Marcus, Brad Kinsey
Recent investigations indicate that metals will deform plastically at much lower stress levels when subject to high density DC currents due to an influence of electrical current on dislocation motion that is athermal in nature. Practical applications in

Effect of Organic SAMs on the Evolution of Strength of Silicon Nanostructures

June 3, 2013
Author(s)
Scott Grutzik, Brian G. Bush, Frank W. DelRio, Richard S. Gates, Melissa Hines, Alan Zehnder
The ability to accurately predict the strength of nanoscale, single crystal structures is critical in micro- and nano-electromechanical systems (MEMS and NEMS) design. Because of the small length scales involved failure does not always follow the same

Graphene Epitaxial Growth on SiC(0001) for Resistance Standards

June 3, 2013
Author(s)
Mariano A. Real, Eric Lass, Fan-Hung H. Liu, Tian T. Shen, George R. Jones Jr., Johannes A. Soons, David B. Newell, Albert Davydov, Randolph Elmquist
A well-controlled technique for high-temperature epitaxial growth on 6H-SiC(0001) substrates is shown to allow development of monolayer graphene that exhibits promise for precise metrological applications. Face-to-face (FTF) and face-to-graphite (FTG)

In-plane Rotation and Scale Invariant Clustering and Dictionary Learning

June 3, 2013
Author(s)
P J. Phillips, Challa Sastry, Yi-Chen Chen, Vishal M. Patel, Rama Chellappa
n this paper, we present an approach that simulta- neously clusters images and learns dictionaries from the clusters. The method learns dictionaries in the Radon transform domain, while clustering in the image domain. The main feature of the proposed

Lattice damage in superconducting microcalorimeter detectors

June 3, 2013
Author(s)
Robert D. Horansky, Joel N. Ullom, Michael W. Rabin
There is currently significant interest in using superconducting detectors for measurement of ion kinetic energies. Unprecedented resolution is possible with an order of magnitude improvement over semiconductors. Superconducting detectors are now able to

Nanofluids, Heat-Transfer Equipment and Plain-Vanilla

June 3, 2013
Author(s)
Mark A. Kedzierski
Nanoparticle materials can be very inexpensive and the technology for producing nanofluids is mature. The production of inks, paints, coatings, and suntan lotions is old enough to be a very competitive industry. So, nanofluids probably set the benchmark

NIST/ASME Steam Properties, Version 3.0

June 3, 2013
Author(s)
Allan H. Harvey, Eric W. Lemmon
This is an update of NIST Standard Reference Database 10. The main purpose of the update is to convert the database to a new graphical user interface that works on 64-bit machines.

Non-equilibrium Fractional Quantum Hall state of light

June 3, 2013
Author(s)
Mohammad Hafezi, Jacob M. Taylor
We investigate the out-of-equilibrium dynamics in strongly interacting photonic systems. Specifically, we develop a method to investigate such system when they are externally driven with a coherent photonic field and evaluate relevant physical observables

Accelerated Stress Test Assessment of Through-Silicon Vias Using RF Signals

June 1, 2013
Author(s)
Chukwudi A. Okoro, Pavel Kabos, Jan Obrzut, Klaus Hummler, Yaw S. Obeng
In this work, radio frequency (RF) signal is demonstrated as an effective metrology tool for the assessment of the effect of thermal cycling on the reliability of through-silicon via (TSV) stacked dies. It was found that RF signal integrity of TSV daisy

Assessment of the glassy phase reactivity in fly ashes used for geopolymer cements

June 1, 2013
Author(s)
Paul E. Stutzman, Katherine Aughenbaugh, Maria Juenger
Geopolymer cements have not found widespread use as a portland cement replacement, in part due to the difficulty in proportioning mixtures in a reliable manner. Unlike portland cements, which are mixed with water, geopolymer cements contain caustic

Cryogen-free Operation of 10 V Programmable Josephson Voltage Standards

June 1, 2013
Author(s)
Logan A. Howe, Charles J. Burroughs, Paul D. Dresselhaus, Samuel P. Benz, Robert E. Schwall
Given the recent shortages of liquid helium, cryogen-free operation of superconducting devices such as programmable Josephson voltage standard (PJVS) systems has become preferred worldwide, and a necessity in some locations. Besides consistent and accurate

Flat Frequency Response in the Electronic Measurement of the Boltzmann Constant

June 1, 2013
Author(s)
Jifeng Qu, Horst Rogalla, Yang Fu, Jianqiang Zhang, Alessio Pollarolo, Samuel Benz
A new quantum voltage calibrated Johnson noise thermometer (JNT) was developed at NIM to demonstrate the electrical approach that determines the Boltzmann constant k by comparing electrical and thermal noise power. A measurement with an integration period
Displaying 21326 - 21350 of 73830
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