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NIST Authors in Bold

Displaying 301 - 325 of 53297

Gamma and Decay Energy Spectroscopy Measurements of Trinitite

April 7, 2021
Author(s)
David Mercer, Katrina Koehler, Mark Croce, Andrew Hoover, Philip Hypes, Stosh Kozimor, Veronika Mocko, Paul Saey, Dan Schmidt, Joel Ullom
We report gamma ray spectroscopy measurements of trinitite samples and analogous samples obtained from detonation sites in Nevada and Semipalatinsk, as well as in situ measurements of topsoil at the Trinity site. We also report the first isotopic

Characterizing LTE User Equipment Emissions Under Closed-Loop Power Control

April 6, 2021
Author(s)
Jason Coder, Aric Sanders, Michael R. Frey, Adam Wunderlich, Azizollah Kord, Jolene Splett, Lucas N. Koepke, Daniel Kuester, Duncan McGillivray, John M. Ladbury
This report presents a laboratory-based characterization of Long Term Evolution (LTE) User Equipment (UE) emissions under closed-loop power control, building on our prior work (NIST TN 2069), which assessed the impact of a large number of factors affecting

Evaluations of a Detector-Limited Digital Impedance Bridge

April 6, 2021
Author(s)
Mona S. Feige, Stephan Schlamminger, Yicheng Wang
We tested a simple digital impedance bridge using two nominally equal resistors to form a 1:1 ratio. We focused on resolution and stability of the detectors. Fluctuations of the source voltages were largely removed through postprocessing of the digitized

UE-to-Network Relay Model B Discovery in ProSe-Enabled LTE Networks

April 6, 2021
Author(s)
Alexandre C. Moreaux, Samantha Gamboa Quintiliani, David Griffith, Richard A. Rouil
In this paper, we expand previous analytical models to offer a more complete representation of Model B ProSe direct discovery. Using these models, we can obtain performance metrics such as the average time a given Remote User Equipment (UE) takes to

Estimations of the effective Young's modulus of specimens prepared by fused filament fabrication

April 5, 2021
Author(s)
Lichen Fang, Yishu Yan, Ojaswi Agarwal, Jonathan Seppala, Kalman D. Migler, Thao D. Nguyen, Kevin Hemker, Sung Hoon Kang
The elastic response of homogeneous isotropic materials is most commonly represented by their Young's modulus (E), but geometric variability associated with additive manufacturing results in materials that are neither homogeneous nor isotropic. Here we

Recovering the Key from the Internal State of Grain-128AEAD

April 3, 2021
Author(s)
Donghoon Chang, Meltem Sonmez Turan
Grain-128AEAD is one of the second-round candidates of the NIST lightweight cryptography standardization process. There is an existing body of third-party analysis on the earlier versions of the Grain family that provide insights on the security of Grain

Data Reduction Tool for Spherical Constant Volume Flame Experiments

April 2, 2021
Author(s)
Michael Hegetschweiler, Gregory T. Linteris
A data reduction tool was developed to conveniently post-process spherical constant volume flame experiments. Such experiments are employed to obtain laminar flame velocities in a premixed gas mixture. The setup is relatively simple and the only recorded

NIST Test Personal Identity Verification (PIV) Cards Version 2

April 2, 2021
Author(s)
David Cooper
In order to facilitate the development of applications and middleware that support the Personal Identity Verification (PIV) Card, NIST has developed a set of test PIV Cards and a supporting public key infrastructure (PKI). This set of test cards includes

Recalibration Intervals for Radiation Detection Instruments

April 2, 2021
Author(s)
Leticia Pibida, Ben Estes, Manuel Mejias, Gladys Klemic
In this work we provide a summary of the National Conference of Standards Laboratories (NCSL) Recommended Practice RP-1 calibration interval analysis method, and examples of the method applied to three sets of available NIST data (two models of radiation

Evidence Against Carbonization of the Thin-Film Filters of the Extreme Ultraviolet Variability Experiment onboard the Solar Dynamics Observatory

April 1, 2021
Author(s)
Charles Tarrio, Robert F. Berg, Thomas B. Lucatorto, Andrew Jones, Frank Eparvier, Brian Templeman, Donald Woodraska, Marie Dominique
In spite of strict limits on outgassing from organic materials, some spacecraft instruments making long-term measurements of solar extreme ultraviolet (EUV) radiation still suff er signi cant degradation. While such measures have reduced the rate of

Experimental study of shear and tensile properties of LIGA Ni-Fe and Ni-Co alloys at quasi-static and intermediate strain rates

April 1, 2021
Author(s)
Li-Anne Liew, David T. Read, May Martin, Todd R. Christenson, Peter E. Bradley, Nicholas Barbosa, Frank W. DelRio, John T. Geaney, Jeffrey Smyth
We report the in-plane shear properties, to fracture, of 200 um-thick LIGA nanocrystalline Ni- 10%Fe and micrograined Ni-10%Co. Planar simple shear specimens were designed, fabricated and pulled to fracture using a miniature commercial tension test stage

Facile fabrication and characterization of kraft lignin@Fe3O4 nanocomposites using pH driven precipitation: effects on increasing lignin content

April 1, 2021
Author(s)
Frankie A. Petrie, Justin Gorham, Robert T. Busch, Serhiy O. Leontsev, Esteban E. Urena-Benavides, Erick S. Vasquez
Kraft lignin@Fe3O4 multicore nanocomposites fabrication proceeded using a simple pH-driven precipitation technique. An alkaline solution for kraft lignin (pH 12) was rapidly injected into an aqueous-based magnetite (Fe3O4) nanoparticle colloidal suspension

New Practical Multivariate Signatures from a Nonlinear Modifier

April 1, 2021
Author(s)
Daniel Smith-Tone
Multivariate cryptography is dominated by schemes supporting various modifiers to patch certain algebraic weaknesses. Typically these modifiers are linear in nature--- either requiring an extra composition with an affine map, or being evaluated by a

Atividades Fundamentais de Ciberseguranca para Fabricantes de Dispositivos IoT

March 31, 2021
Author(s)
Michael Fagan, Katerina N. Megas, Matt Smith, Karen Scarfone
Os dispositivos da Internet das Coisas (IoT) muitas vezes não possuem recursos de segurança cibernética de acordo com os dispositivos que os seus clientes — organizações e indivíduos — querem usar para ajudar a mitigar riscos de segurança cibernética. Os
Displaying 301 - 325 of 53297