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Search Publications

NIST Authors in Bold

Displaying 11176 - 11200 of 73697

Metrics-Driven Evaluation of Cybersecurity for Critical Railway Infrastructure

August 23, 2018
Author(s)
Himanshu Neema, Bradley Potteiger, Xenofon Koutsoukos, CheeYee Tang
In the past couple of years, railway infrastructure has been growing more connected, resembling more of a traditional Cyber-Physical System [1] model. Due to the tightly coupled nature between the cyber and physical domains, new attack vectors are emerging

Nanoparticle Architecture Preserves Magnetic Properties during Coating to Enable Robust Multi-Modal Functionality

August 23, 2018
Author(s)
Lauren E. Woodard, Cindi L. Dennis, Julie Borchers, Anilchandra Attaluri, Esteban Velarde, Charlene Dawidczyk, Peter C. Searson, Martin G. Pomper, Robert Ivkov
Mixed metal/metal oxide nanoparticles offer potential as multifunctional platforms for disease diagnosis and therapy, or 'theranostics' [1-9]. We describe the synthesis and characterization of gold/silica/iron oxide core-shell nanoparticles, for which the

PRIMARY STANDARDIZATION OF THE MASSIC ACTIVITY OF A PROTACTINIUM-233 SOLUTION

August 23, 2018
Author(s)
Ryan P. Fitzgerald, Leticia S. Pibida
Protactinium-233 (233Pa) is used as a tracer for radiochemical analysis and is of particular interest as an isotope dilution mass spectrometry (IDMS) spike for 231Pa/235U radio- chronometry. To this end, we present massic activity determinations by two

Complex coacervation in polyelectrolytes from a coarse-grained model

August 22, 2018
Author(s)
Jack F. Douglas, Marat Andreev, Juan J. DePablo, Vivek Prabhu, Matthew Tirrell
Polyelectrolyte coacervation refers to the formation of distinct liquid phases that arise when polyelectrolytes are mixed under appropriate polymer and salt concentrations. Molecular-level studies of complex polyelectrolyte coacervation have been limited

Complex coacervation in polyelectrolytes from a coarse-grained model

August 22, 2018
Author(s)
Vivek M. Prabhu, Marat Andreev, Jian Qin, Matthew Tirrell, Juan J. de Pablo, Jack F. Douglas
Polyelectrolyte coacervation refers to the formation of distinct liquid phases that arise when polyelectrolytes of opposite charge are mixed under appropriate polymer and salt concentrations. Molecular-level studies of complex polyelectrolyte coacervation

Photonic Topological Anderson Insulators

August 22, 2018
Author(s)
Simon St?tzer, Yonatan Plotnik, Yaakov Lumer, Paraj T. Bhattacharjee, Netanel Lindner, Mordechai Segev, Mikael Rechtsman, Alexander Szameit

Quadrature Histograms in Maximum Likelihood Quantum State Tomography

August 22, 2018
Author(s)
Leonardo E. Silva, Scott Glancy, Hilma H. Macedo De Vasconcelos
Quantum state tomography aims to determine the quantum state of a system from measured data and is an essential tool for quantum information science. When dealing with continuous variable quantum states of light, tomography is often done by measuring the

Research Needs to Support Immediate Occupancy Building Performance Following Natural Hazard Events

August 21, 2018
Author(s)
Siamak Sattar, Therese P. McAllister, Katherine J. Johnson, Christopher T. Clavin, Christopher L. Segura, Steven L. McCabe, Juan F. Fung, Leslie Abrahams, Emily Sylak-Glassman , Marc L. Levitan, Kenneth W. Harrison, John L. Harris
The performance of buildings in our communities depends on multiple factors including the availability of supporting infrastructure, the original design, the current condition and capacity to resist hazard impacts, and the ability to recover functionality

The Effects of Laser Powder Bed Fusion Process Parameters on Material Hardness and Density for Nickel Alloy 625

August 21, 2018
Author(s)
Christopher U. Brown, Gregor Jacob, Antonio M. Possolo, Carlos R. Beauchamp, Max A. Peltz, Mark R. Stoudt, M A. Donmez
The goal of this study was to investigate the relationship between mechanical and material properties (including density) of manufactured nickel super alloy (IN625) using a laser powder bed fusion process and three process parameters: laser power, hatch

White Rabbit-Based Time Distribution at NIST

August 21, 2018
Author(s)
Joshua J. Savory, Jeffrey A. Sherman, Stefania Romisch
The National Institute of Standards and Technology (NIST) is responsible for ensuring the quality of its international and domestic time and frequency distribution systems. Since the physical inputs to these systems are not collocated within the campus, an

Bubble-Point Measurements and Modeling of Binary Mixtures of Linear Siloxanes

August 20, 2018
Author(s)
Luuc Keulen, Elisabeth Mansfield, Ian Bell, Andrea Spinelli, A. Guardone
The bubble-point pressures of three binary mixtures of linear siloxanes have been mea4 sured. The binary mixtures consist of hexamethyldisiloxane (MM) which is mixed with ei5 ther octamethyltrisiloxane (MDM), decamethyltetrasiloxane (MD2M), and

Fe 2 MnGe: A Hexagonal Heusler Analogue

August 20, 2018
Author(s)
S. Keshavarz, N. Naghibolashrafi, Michelle E. Jamer, K. Vinson, D. Mazumdar, Cindi L. Dennis, William D. Ratcliff, Julie Borchers, A. Gupta, P. LeClair
Fe 2MnGe is a potential half-metallic full-Heusler L2 1 ferromagnetic compound with large spin polarization (approximately equal}97%) useful for various spintronic applications according to our first principles calculations using density functional theory

Securing Wireless Infusion Pumps in Healthcare Delivery Organizations

August 20, 2018
Author(s)
Gavin W. O'Brien, Sallie Edwards, Kevin Littlefield, Neil McNab, Sue Wang, Kangmin Zheng
Medical devices, such as infusion pumps, were once standalone instruments that interacted only with the patient or medical provider. However, today’s medical devices connect to a variety of healthcare systems, networks, and other tools within a healthcare

Towards a Platform for Smart Manufacturing Improvement Planning

August 20, 2018
Author(s)
Boonserm Kulvatunyou, Sangsu Choi, Thorsten Wuest
The manufacturing industry is transitioning towards smart manufacturing systems (SMS). Small and medium size manufacturers (SMMs) are particularly be-hind in this transition, plagued by lack of knowledge and resources. Several smart manufacturing

Bottom-up Filling of Damascene Trenches with Gold in a Sulfite Electrolyte

August 19, 2018
Author(s)
Daniel Josell, Thomas P. Moffat
Superconformal Au deposition is demonstrated in a Na3Au(SO3)2 + Na2SO3 electrolyte including Bi3+. Micromolar additions of the Bi3+ to the electrolyte catalyze the reduction of Au(SO3)23- based on hysteretic voltammetry and rising chronoamperometric

Condition-based Real-time Production Control for Smart Manufacturing Systems

August 19, 2018
Author(s)
Yan Lu, Feifan Wang, Feng Ju
In this paper, we present condition-based real-time production control for smart manufacturing which is aimed at improving system performance by automatically assessing a production system's condition and dynamically configuring the processing routes for

Pseudorandom Quantum States

August 19, 2018
Author(s)
Yi-Kai Liu, Zhengfeng Ji, Fang Song
We propose the concept of pseudorandom quantum states, which appear random to any quantum polynomial-time adversary. It offers a computational approximation to perfectly random quantum states (analogous to cryptographic pseudorandom generators), as opposed
Displaying 11176 - 11200 of 73697
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