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Search Publications

NIST Authors in Bold

Displaying 17301 - 17325 of 73697

THE COMPELLING CASE FOR INDENTATION AS A FUNCTIONAL EXPLORATORY AND CHARACTERIZATION TOOL

September 15, 2015
Author(s)
Robert F. Cook, David B. Marshall, Nitin P. Padture, Michelle L. Oyen, Antonia Pajares, Jodie E. Bradby, Ivar E. Reimanis, Rajan Tandon, Trevor F. Page, George M. Pharr, Brian R. Lawn
The utility of indentation testing for characterizing a wide range of mechanical properties of brittle materials is highlighted in light of recent articles questioning its validity, specifically in relation to the measurement of toughness. Contrary to

VIIRS/J1 Polarization Narrative

September 15, 2015
Author(s)
Keith R. Lykke, Steven W. Brown, Eugene Waluschka, Joel McCorkel, Jeff McIntire, David Moyer, Brendan McAndrew, James B. Young, Eric Fest, James Butler, Tung R. Wang, Eslim O. Monroy, Kevin Turpie, Gerhard Meister, Kurtis J. Thome
The VIS/NIR bands polarization sensitivity of Joint Polar Satellite Sensor 1 (JPSS1) Visible/Infrared Imaging Radiometer Suite (VIIRS) instrument was measured using a broadband source. While polarization sensitivity for bands M5-M7, I1, and I2 was less

Hydration of Conduction Pores in KcsA Potassium Channel and M2 Proton Channel

September 14, 2015
Author(s)
J L. Blasic, David L. Worcester, Klaus Gawrisch, Philip A. Gurnev, Mihaela Mihailescu
Water-filled hydrophobic cavities of channel proteins serve as gateways for transfer of ions across membrane. However, functional implications of hydration-dehydration transitions remain elusive due to difficulties to detect and quantify water in channel

The Osmotic Virial Repersentation of the Free Energy of Polymer Mixing

September 14, 2015
Author(s)
Jack F. Douglas, August W. Bosse
In this Letter we derive a new representation of the free energy of polymer mixing. We begin with a Flory-Huggins-like free energy of mixing, and assume that the excess free energy of mixing exhibits an arbitrary dependence on the blend composition that

Predictive Models for Min-Entropy Estimation

September 13, 2015
Author(s)
John M. Kelsey, Kerry McKay, Meltem Sonmez Turan
Random numbers are essential for cryptography. In most real-world systems, these values come from a cryptographic pseudorandom number generator (PRNG), which in turn is seeded by an entropy source. The security of the entire cryptographic system then

DESIGN RULES WITH MODULARITY FOR ADDITIVE MANUFACTURING

September 11, 2015
Author(s)
Haeseong J. Jee, Yan Lu, Paul Witherell
Design rules in additive manufacturing (AM) can help ensure manufacturability, which can be viewed as compatibility between designs and the fabrication processes that produce those designs. Additionally, such rules frequently provide direct guidelines or

Orthogonal Analysis of Functional Gold Nanoparticles for Biomedical Applications

September 11, 2015
Author(s)
De-Hao D. Tsai, Yi-Fu Lu, Frank W. DelRio, Tae Joon Cho, Suvajyoti S. Guha, Michael R. Zachariah, Fan Zhang, Andrew J. Allen, Vincent A. Hackley
We report a comprehensive strategy based on implementation of orthogonal measurement techniques to provide critical and verifiable material characteristics for functionalized gold nanoparticles (AuNPs) used in biomedical applications. Thiolated

Analysis of the Second Phase of the 2013-2014 i-Vector Machine Learning Challenge

September 10, 2015
Author(s)
Desire Banse, G R. Doddington, Craig Greenberg, John M. Howard, Alvin F. Martin, Daniel Garcia-Romero, John J. Godfrey, Jaime Hernandez-Cordero, Lisa Mason, Alan McCree, Douglas A. Reynolds
In late 2013 and 2014, the National Institute of Standards and Technology (NIST) coordinated an i-vector challenge utilizing data from previous NIST Speaker Recognition Evaluations. Following the evaluation period, a second phase of the challenge was held

FFT-based Alignment of 2d Closed Curves with Application to Elastic Shape Analysis

September 10, 2015
Author(s)
Gunay Dogan, Javier Bernal, Robert Hagwood
For many shape analysis problems in computer vision and scientific imaging (e.g., computational anatomy, morphological cytometry), the ability to align two closed curves in the plane is crucial. In this paper, we concentrate on rigidly aligning pairs of

NIST Language Recognition Evaluation Plans For 2015

September 10, 2015
Author(s)
Alvin F. Martin, Craig S. Greenberg, John M. Howard, Desire Banse, G R. Doddington, Jaime Hernandez-Cordero, Lisa Mason
We discuss two NIST coordinated evaluations of automatic language recognition technology planned for calendar year 2015 along with possible additional plans for the future. The first is the Language Recognition i-V ector Machine Learning Challenge, largely

Rapid DNA Maturity Assessment

September 10, 2015
Author(s)
Erica L. Romsos, Sanae Lembirick, Peter Vallone
Two fully integrated rapid DNA platforms were tested as a part of a rapid DNA maturity assessment in the fall of 2014. The assessment was conducted with sets of blinded single-source reference samples to gauge the typing success of the current rapid DNA

Report for Dedicated JPSS VIIRS Ocean Color Calibration/Validation Cruise

September 10, 2015
Author(s)
Bettye C. Johnson, Michael Ondrusek, Eric Stengel, Veronica P. Lance, Menghua Wang, Kenneth Voss, Giuseppe Zibordi, Marco Talone, Zhongping Lee, Jianwei Wei, Junfang Lin, Chuanmin Hu, David English, Charles Kovach, Jennifer Cannizzaro, Alex Gilerson, Sam Ahmed, Amir Ibrahim, Ahmed El-Habashi, Robert Foster, Robert Arnone, Ryan Vandermeulen, Sherwin Ladner, Wesley Goode, Joaquim I. Goes, Helga de Rosario Gomes, Kali McKee, Scott Freeman, Aimee Neeley
The purpose of this cruise aboard the NOAA Ship Nancy Foster was to collect in situ optical and ancillary data for validation of JPSS VIIRS satellite ocean color radiometry and derived products [Wang et al., 2013; Wang et al., 2014]. The project interval

CORRELATIONS AMONG ACOUSTIC MEASUREMENTS OF THE BOLTZMANN CONSTANT

September 9, 2015
Author(s)
Michael R. Moldover, Roberto M. Gavioso, David B. Newell
We review correlated uncertainties among the accurate determinations of the Boltzmann constant kB that used the techniques of primary acoustic gas thermometry (AGT). We consider uncertainty contributions from four sources: (1) resonator-dependent

Dictionary-based Face and Person Recognition from Unconstrained Video

September 9, 2015
Author(s)
P J. Phillips, Yi-Chen Chen, Vishal M. Patel, Rama Chellappa
The main challenge in recognizing people in uncon- strained video is exploiting the identity information in multiple frames and the accompanying dynamic signature. These identity cues include face, body, and motion. Our approach is based on video

Direct Immersion Annealing of Thin Block Copolymer Films

September 9, 2015
Author(s)
Jack F. Douglas, Alamgir Karim, Arvind Arvind Modi1, Sarang Bhaway, Bryan D. Vogt, Abdullah Al-Enizi, Ahmed Elzatahry, Ashutosh Sharma
We demonstrate that direct immersion annealing (DIA) greatly enhances the rate at which block copolymer (BCP) films order into stable morphologies when the BCP films are immersed in carefully selected mixtures of good and marginal solvents that can impart

Optomechanical Raman-Ratio Thermometry

September 9, 2015
Author(s)
Katarina Cicak, Thomas P. Purdy, Pen Li Yu, Nir Kampel, Bob Peterson, Raymond Simmonds, Cindy Regal
The temperature dependence of the asymmetry between Stokes and anti-Stokes Raman scattering can be exploited for self-calibrating, optically-based thermometry. In the context of cavity optomechanics, we observe the cavity-enhanced scattering of light

Quantitative tool characterization of a 193 nm scatterfield microscope

September 9, 2015
Author(s)
Martin Y. Sohn, Bryan M. Barnes, Hui Zhou, Richard M. Silver
Optical microscope tool characterization has been investigated for the quantitative measurements of deep sub-wavelength features using a Fourier plane normalization method. The NIST 193 nm scatterfield microscope operating with an ArF Excimer laser, which

A detailed comparison of two continuous GPS carrier-phase time transfer techniques

September 8, 2015
Author(s)
Jian Yao, Judah Levine, Skakun Ivan, Zhiheng Jiang
The wide application of GPS carrier-phase (CP) time transfer is limited by the problem of boundary discontinuity (BD). The discontinuity has two categories. One is "day boundary discontinuity," which has been studied extensively and can be solved by a few
Displaying 17301 - 17325 of 73697
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