Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Conferences

Incorporating an Optical Clock into a Time Scale at NIST: Simulations and Preliminary Real-Data Analysis

March 29, 2018

Author(s)

Jian Yao, Jeffrey A. Sherman, Tara M. Fortier, Thomas E. Parker, Judah Levine, Joshua J. Savory, Stefania Romisch, William F. McGrew, Robert J. Fasano, Stefan A. Schaeffer, Kyle P. Beloy, Andrew D. Ludlow

This paper shows the recent NIST work on incorporating an optical clock into a time scale. We simulate a time scale composed of continuously-operating...

SIM Time Scale: 10 years of operation

March 29, 2018

Author(s)

J. M. Lopez, Michael A. Lombardi, E. de Carlos, N. Munoz, C. Ortiz

The Inter-American Metrology System (SIM) is one of the world's five major Regional Metrology Organizations (RMO's). Starting in 2005, the SIM Time and...

Instrumenting Open vSwitch with Monitoring Capabalities: Designs and Challenges

March 28, 2018

Author(s)

Zili Zha, An Wang, Yang Guo, Douglas C. Montgomery, Songqing Chen

The recent advances on Software-Defined Networking (SDN) have made flexible and programmable network measurement possible. A promising trend is to conduct...

Characterizing Gas-Collection Volumes with Acoustic and Microwave Resonances

March 27, 2018

Author(s)

Jodie Gail Pope, Keith A. Gillis, Michael R. Moldover, J B. Mehl, Eric Harman

We characterized a 1.8 m3, nearly-spherical, steel shell at pressures up to 7 MPa for use as a gas flow standard. For pressure, volume, temperature, and time...

Testing IoT Systems

March 26, 2018

Author(s)

Jeffrey M. Voas, David R. Kuhn, Phil Laplante

The ability to test systems that are based on the underlying products and services commonly referred to as the Internet of 'things' (IoT) is discussed. The role...

An Analytical Framework for Smart Manufacturing

March 25, 2018

Author(s)

Peter O. Denno, Amogh Kulkarni, Daniel Balasubramanian, Gabor Karsai

Smart manufacturing is an emerging paradigm for the next generation of manufacturing systems. One key to the success of smart manufacturing is the ability to...

Numerical Validation of a Boundary Element Method With E and dE/dN as the Boundary Unknowns

March 24, 2018

Author(s)

Johannes Markkanen, Alex Yuffa, Josh Gordon

We recently developed a surface integral equation method where the electric field and its normal derivative are chosen as the boundary unknowns. After reviewing...

Millimeter-wave Frequency FDTD Simulation for Error Vector Magnitude of Modulated Signals

March 24, 2018

Author(s)

Joseph Diener, Jeanne Quimby, Kate Remley, Atef Elsherbeni

At millimeter frequencies, a simulation of propagating complex modulated signals through a environmental channel can be computationally prohibitive using the...

A Design Tool for High Performance Image Processing on Multicore Platforms

March 23, 2018

Author(s)

Timothy J. Blattner, Jiahao Wu, Walid Keyrouz, Shuvra S. Bhattacharyya

Design and implementation of smart vision systems often involve the mapping of complex image processing algorithms into efficient, real-time implementations on...

A System for Centralized ABAC Policy Administration and Local ABAC Policy Decision and Enforcement in Host Systems using Access Control Lists

March 21, 2018

Author(s)

David F. Ferraiolo, Serban I. Gavrila, Gopi Katwala

We describe a method that centrally manages Attribute-Based Access Control (ABAC) policies and locally computes and enforces decisions regarding those policies...

Errors in Rate of Rise Gas Flow Measurements from Flow Work

March 20, 2018

Author(s)

John D. Wright, Aaron Johnson, Gina Kline, Michael R. Moldover

The rate of rise (RoR) method measures the time rate of change of the mass of gas in a collection volume as it is filled via a flow meter under test. The mass...

Evaluation of RTOT algorithm: a first implementation of OBSS_PD-based SR method for IEEE 802.11ax

March 19, 2018

Author(s)

Tanguy Ropitault

The main goal of the IEEE 802.11ax project is to improve the network efficiency of IEEE 802.11 systems in dense deployments. There are currently several methods...

Effectiveness of Laser Safety Eyewear under Real-World Conditions

March 18, 2018

Author(s)

Christopher J. Stromberg, Edwin J. Heilweil, Joshua A. Hadler

Ultrafast lasers have become increasingly important as research tools in chemistry, which means laser safety is becoming more important. Laser safety glasses...

Identification and Quantification of Aflatoxin Guanine and FapyGuanine Adducts in Mouse Liver invivo by LC-MS/MS Isotope Dilution

March 11, 2018

Author(s)

Erdem Coskun, Vladimir Vartanian, Irina G. Minko, Onur Erdem, Pawel Jaruga, Patricia Egner, John D. Groopman

Dietary exposures to aflatoxin contaminated food is one of the major contributions to human hepatocellular carcinomas (HCCs) which accounts for over 700.000...

Evaluated Rate Constants for i-Butane + H and CH3: Shock Tube Experiments with Bayesian Model Optimization

March 7, 2018

Author(s)

Laura A. Mertens, Iftikhar A. Awan, Jeffrey A. Manion

The reactions of i-butane with CH3 and H were investigated with shock tube experiments (870 K to 1130 K and 140 kPa to 360 kPa). Propene and i-butene, measured...

Kinetics of H Atom Addition to Cyclopentene

March 7, 2018

Author(s)

Jeffrey A. Manion, Iftikhar A. Awan

To provide benchmark information needed to develop kinetic models of the combustion and pyrolysis of hydrocarbon ring structures, we have used the single pulse...

Contactless mobility measurements using two-photon excitation and a terahertz probe

March 6, 2018

Author(s)

Jared Wahlstrand, Edwin Heilweil

Time-dependent THz spectroscopy is widely used for measuring mobility in novel electronic materials, in which the mobility is often adversely affected by...

Development and Validation of a Mechanism for Flame Propagation in R-32/Air Mixtures

March 6, 2018

Author(s)

Donald R. Burgess Jr., Jeffrey A. Manion, Robert R. Burrell, Valeri I. Babushok, Michael Hegetschweiler, Gregory T. Linteris

A mechanism for the combustion of the refrigerant R-32 (CH2F2) in air mixtures was developed and validated through comparisons with measured flame speeds for a...

Predicted Burning Velocities of C1 and C2 Hydrofluorocarbon Refrigerant Flames with Air

March 6, 2018

Author(s)

Gregory T. Linteris, Valeri I. Babushok

Due to their high global warming potentials, many existing working fluids for heating, cooling and refrigeration equipment will be phased out. Their...

Remote Bias Induced Electrostatic Force Microscopy for Subsurface Imaging

March 5, 2018

Author(s)

Joseph J. Kopanski, Lin You, Yaw S. Obeng

Contrast in electrostatic force microscopy (EFM) depends on the electrostatic force between the tip and sample. In the related technique, scanning Kelvin force...

Towards Augmented Reality Interfaces for Human-Robot Interaction in Manufacturing Environments

March 4, 2018

Author(s)

Shelly Bagchi, Jeremy Marvel

As part of the U.S. Department of Commerce, the National Institute of Standards and Technology (NIST) is examining new approaches to increase the...

Why Interoperability R&D Work Should be Driven by Agile Integration and Message Standards Concerns?

March 3, 2018

Author(s)

Nenad Ivezic, Boonserm Kulvatunyou

Smart Manufacturing assumes agile integration of manufacturing services and applications. This implies that manufacturing message standards, which are key to...

A Multiscale Framework for the Prediction of Concrete Self-Desiccation

March 1, 2018

Author(s)

Madura Pathirage, Dale P. Bentz, Giovanni Di Luzio, Enrico Masoero, Gianluca Cusatis

Cement hydration in concrete and mortar has been studied thoroughly over the past 50 years. To fully understand hydration in concrete and predict the evolution...

A Framework to Enable Multiple Coexisting Internet of Things Applications

March 1, 2018

Author(s)

Wei Yu, Hanlin Zhang, Yalong Wu, David W. Griffith, Nada T. Golmie

Internet of Things (IoT) uses modern information communication technologies to connect massive numbers of objects and support numerous smart critical...

Performance Evaluation of Energy Efficiency with Sleep Mode in Ultra Dense Networks

March 1, 2018

Author(s)

Hansong Xu, Wei Yu, Amirshahram Hematian, David W. Griffith, Nada T. Golmie

Massively deployed mobile devices and an extensive volume of data traffic will immensely increase demand on future wireless networks. The Ultra Dense Network...

Novel multiscale characterization of carbon nanotube grafted fiber-reinforced polymer composites.

February 25, 2018

Author(s)

Ajay Krishnamurthy, Ran Tao, Erkan N. Senses, Qi An, Sagar Doshi, Erik Thostenson, Antonio Faraone, Aaron Forster

Hierarchical carbon nanotube-alumina oxide fiber reinforced composites and oxide hydration kinetics

February 25, 2018

Author(s)

Ajay Krishnamurthy, Andrew Liotta, Brian L. Wardle, Aaron Forster

The growth of carbon nanotubes directly from fiber surfaces has led to new concepts for fiber reinforced polymer composites (FRP) that are conductive, thermally...

New Connections for Enhancing Robustness of Precast Concrete Frame Structures

February 24, 2018

Author(s)

Travis E. Thonstad, Yihai Bao, Jonathan M. Weigand, Joseph A. Main, Hai S. Lew

A recent experimental and computational study of two precast concrete moment-frame assemblies under a column removal scenario revealed vulnerabilities in the...

Large Field of View Quantitative Phase Imaging of Induced Pluripotent Stem Cells and Optical Pathlength Reference Materials

February 23, 2018

Author(s)

Edward J. Kwee, Alexander W. Peterson, Jeffrey R. Stinson, Michael W. Halter, Liya Yu, Michael P. Majurski, Joe Chalfoun, Peter Bajcsy, John T. Elliott

Induced pluripotent stem cells (iPSCs) are reprogrammed cells that can have heterogeneous biological potential. Quality assurance metrics of reprogrammed iPSCs...

Mass Measurements of Focal Adhesions in Single Cells Using High Resolution Surface Plasmon Resonance Microscopy

February 22, 2018

Author(s)

Alexander Peterson, Alessandro Tona, Michael Halter, Anne Plant, John Elliott

Surface plasmon resonance microscopy (SPRM) is a powerful label-free imaging technique with spatial resolution approaching the optical diffraction limit. The...

Was this page helpful?