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Search Publications

NIST Authors in Bold

Displaying 7826 - 7850 of 13218

In Situ Monitoring of Cu/Al Laser Welding using Laser Induced Fluorescence

September 10, 2020
Author(s)
Brian Simonds, Tran N. Tran, Paul A. Williams
… molten metal interaction time. For laser lap welds, Cu in the vapor plume is indicative of the degree of Cu melting. … suggests that LIF may be sensitive enough for real-time, in situ monitoring of Cu/Al laser welding. … In Situ Monitoring of Cu/Al Laser Welding using Laser Induced …

Simultaneous High-speed X-ray Transmission Imaging and Absolute Dynamic Absorptance Measurements during High-power Laser-metal Processing

September 10, 2020
Author(s)
Brian Simonds, Jack R. Tanner, Alexandra B. Artusio-Glimpse, Paul A. Williams, Niranjan Parab, Cang Zhao, Tao Sun
… The x-ray imaging corroborates that a dramatic rise in laser absorption is due to keyhole formation. We also find … correlations between keyhole fluctuations and rapid dips in energy absorption that occur during nominally … For instance, we discover that rapid, momentary decreases in absorbed energy of over 25% correlate with instantaneous …

Energy Harvesting from the Human Leg Motion

July 23, 2014
Author(s)
Kamran Sayrafian, Antonio M. Possolo, Nathalie Yarkony
… and convenient solution for wearable wireless sensors in healthcare applications. Due to their small size, such … such as remote vital sign monitoring. Our objective, in this paper, is to investigate the amount of harvestable …

Borrowing from Video Games: Impacts on Visual Analytic Tools for Collaboration Among Digital Native Intelligence Analysts

March 28, 2008
Author(s)
Theresa O'Connell, Yee-Yin Choong, John D. Grantham, M Moriarty, W Wong
… to collaborative play over non-collaborative play. Players in the digital natives age range participated in a riddle-solving game. Collaboration conditions varied … we derived recommendations for promoting collaboration in visual analytic tools, designed for intelligence analysts, …

Magnetic Method to Characterize the Current Densities in a Breaker Arc

April 1, 2005
Author(s)
Nadia Machkour-Deshayes
… model. Using deconvolution methods, the current density in the electric arc was determined. The method is used to … 16th ANS Topical Meeting on the Technology of Fusion Energy … Magnetic Method to Characterize the Current Densities in a Breaker Arc …

Pulse Parameter Dependence on Transition Position and Epoch Duration

May 18, 2004
Author(s)
Donald R. Larson, Nicholas Paulter, David I. Bergman
… function of the epoch and position of the transition edge in the epoch. The primary explanations for the observed … of the 21st IEEE Instrumentation and Measurement Technology Conference …

Extinction of Cup-Burner Diffusion Flames by Catalytic and Inert Inhibitors

December 1, 2002
Author(s)
Gregory T. Linteris
… flame inhibitors blended with CO2 have been performed in methane-air co-flow diffusion flames. Although the … more effective inhibitors than CF3Br when evaluated in premixed and counterflow diffusion flames, they have been … found to be surprisingly ineffective compared to CF3Br in cup-burner flames. In order to understand the poor …

Advanced Metrology Suite for Linking Residual Stress to Fundamental Properties of Thermoset Packaging Materials

June 26, 2025
Author(s)
Polette Centellas, Stian Romberg, Ran Tao, Alexander Landauer, Karl Schoch, Huong Giang Nguyen, Gale Holmes, Gery Stafford, Christopher Soles
… Residual stresses inevitably develop in thermosetting materials used for semiconductor packaging during the curing process and in service. Understanding the development of these … stress development with fundamental material properties in a commercial liquid encapsulant. …

Towards system level simulations of public safety applications in 5G NR systems with sidelink

July 30, 2024
Author(s)
Samantha Gamboa Quintiliani, Thomas Henderson, Wesley Garey, Chunmei Liu, Richard Rouil
… The New Radio (NR) sidelink (SL) interface in fifth generation (5G) NR systems was initially specified … (MCPTT) application, a keystone of group communication in 5G NR public safety networks. We demonstrate through … 2024 IEEE World Forum on Public Safety Technology (WF-PST) …

AI Assurance for the Public -- Trust but Verify, Continuously

October 3, 2022
Author(s)
Phillip Laplante, D. Richard Kuhn
… Artificial intelligence (AI) systems are increasingly seen in many public facing applications such as self-driving land … consequences of failure or erroneous or unfair decisions in these systems, how do we assure the public that these systems work as intended and will not cause harm? In this paper we discuss AI trust and assurance and related …

Characterization of residential circuit impedance

February 17, 2021
Author(s)
DJ Anand, Md Amimul Ehsan, Wenqi Guo
… spectra of commonly used switching power electronics in a residential electrical system have been profiled before. … of the voltage and current transfer function (in the frequency range 20Hz – 100kHz) from purported sources … capacitance close to the point of coupling, resulting in a complex zero in the transfer function and the consequent …

Assessment of Radiation Solver of Fire Simulation Models Using RADNNET-ZM

September 13, 2019
Author(s)
Wai Cheong Tam, Walter W. Yuen
… (RADNNET-ZM) for the analysis of radiative heat transfer in an arbitrary Cartesian enclosure with an isothermal, … accounts for the non-gray effect of absorbing species in a combustion environment and the geometric effect of any … of radiative heat transfer without a significant increase in computation cost. …

Influence of Base Sheathing Material on Wind-Driven Firebrand Production during Real-Scale Building Component Combustion

September 13, 2019
Author(s)
Samuel L. Manzello, Sayaka Suzuki, Tomohiro Naruse
… firebrands during large outdoor fires remains unresolved in spite of many advances in the fire safety science discipline. To better grasp this … full-scale re-entrant corner assemblies exposed to wind in order to sample firebrands. In prior work, an ignition … 11th Asia-Oceania Symposium on Fire Science and Technology (AOSFST) …

Interoperability Test for IEEE C37.118 Standard-based Phasor Measurement Units (PMUs)

December 12, 2016
Author(s)
Gerald J. FitzPatrick, Yuyin Song
… to maintain grid reliability. Thousands of PMUs deployed in the North American power grid are supplied by a number of … PMUs. An interoperability test system provided in this paper consists of five parts: a PMU tester, device … over Ethernet. One interoperability test case is described in detail. The interoperability test results of five test …

Creating Integrated Evidence Graphs for Network Forensics

October 18, 2013
Author(s)
Changwei Liu, Anoop Singhal, Duminda Wijesekera
… forensics analyst collate and visualize dependencies. In particular, probabilistic evidence graph provide a way to … attack paths with available evidence. Existing work in evidence graphs assume that all evidence is available as … based on attacks on a fileserver and a database server in a lab network environment. An integrated evidence graph …

Metrological Challenges Introduced by New Tolerancing Standards

July 5, 2013
Author(s)
Ed Morse, Yue Peng, Vijay Srinivasan, Craig M. Shakarji
… system. A sampling strategy that might have worked well in the past could lead to erroneous results that go … undetected when used to evaluate these new specifications. In this paper we investigate how measurement strategies for … 11th ISMTII (International Symposium on Measurement Technology and Intelligent Instrumentation) …

VM Leakage and Orphan Control in Open-Source Clouds

November 29, 2011
Author(s)
Christopher E. Dabrowski, Kevin L. Mills
… or malicious attacks, and computers can even crash in extreme cases of resource exhaustion. The advent of cloud … We identify a set of orphan control processes needed in multiple cloud components, and we illustrate how such … 3rd IEEE International Conference on Cloud Computing Technology and Science …
Displaying 7826 - 7850 of 13218
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