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Displaying 6351 - 6375 of 74371

Simultaneous Measurements of Keyhole Depth and Absolute Absorptance During Stationary Laser Irradiance

June 29, 2020

Author(s)

Troy Allen, Wenkang Huange, Jack R. Tanner, Wenda Tan, James Fraser, Brian Simonds

Understanding the underlying physics of laser welding and metal additive manufacturing (AM) is crucial to the advancement of laser-based manufacturing. One aspect that especially requires careful attention and control is the formation and evolution of

Advanced sensing development to support accuracy assessment for industrial robot systems

June 26, 2020

Author(s)

Guixiu Qiao, Jonathan H. Garner

Manufacturers currently struggle with the assessment of a machine/robots' accuracy degradation that limits the efficiency of machine/robots in high precision applications. Current best practice in industry is to inspect the final products or add

ASSESSMENT OF A NOVEL POSITION VERIFICATION SENSOR TO IDENTIFY AND ISOLATE ROBOT WORKCELL HEALTH DEGRADATION

June 26, 2020

Author(s)

Brian A. Weiss, Jared Kaplan

Manufacturing processes have become increasingly sophisticated leading to greater usage of robotics. Sustaining successful manufacturing robotic operations requires a strategic maintenance program. Maintenance can be very costly, especially when some

Asset Condition Management: A Framework for Smart, Health-Ready Manufacturing Systems

June 26, 2020

Author(s)

Nancy Diaz-Elsayed, Luis Hernandez, Ravi Rajamani, Brian Weiss

Unscheduled downtime in manufacturing systems can be a major source of lost productivity, profits, and, ultimately, reduced process quality and reliability. However, the incorporation of asset condition management (ACM) into manufacturing systems offers an

MSEC: A QUANTITATIVE RETROSPECTIVE

June 25, 2020

Author(s)

Rachael Sexton, Michael Brundage, Alden A. Dima, Michael Sharp

The Manufacturing Science and Engineering Conference (MSEC) in 2020 is the 15th annual conference put on by the Manufacturing Engineering Division (MED) of ASME. MED and ASME MSEC focuses on manufacturing sciences, technology, and applications, including

Retrieval of the Refractive Index Structure Parameter from Frequency Comb Timing Jitter Data

June 26, 2020

Author(s)

Emily Caldwell, Nathan R. Newbury, William C. Swann, Laura Sinclair, Jennifer L. Ellis, Martha I. Bodine, Greg Rieker, Carter Mak, Nathan Kuczun, Andreas Muschinski

Valence-to-core x-ray emission spectroscopy of titanium compounds using energy dispersive detectors

June 26, 2020

Author(s)

Luis Miaja Avila, Galen C. O'Neil, Young I. Joe, Kelsey M. Morgan, Joseph W. Fowler, William B. Doriese, Brianna Ganly, Deyu Lu, Bruce D. Ravel, Daniel S. Swetz, Joel N. Ullom

A DEEP NEURAL NETWORK MODEL FOR LEARNING RUNTIME FREQUENCY RESPONSE FUNCTION USING SENSOR MEASUREMENTS

June 25, 2020

Author(s)

Yongzhi Qu, Gregory W. Vogl, Zechao Wang

The frequency response function (FRF), defined as the ratio between the Fourier transform of the time-domain output and the Fourier transform of the time-domain input, is a common tool to analyze the relationships between inputs and outputs of a mechanical

Filtration Efficiencies of Nanoscale Aerosol by Cloth Mask Materials Used for Protection from SARS CoV-2

June 25, 2020

Author(s)

Christopher D. Zangmeister, James G. Radney, Edward P. Vicenzi, Jamie L. Weaver

Filtration efficiencies (FE), pressure drops (ΔP) and construction parameters were measured for 27 cloth materials (12 cotton, 8 full synthetic, 3 synthetic blends, 4 synthetic/cotton blends) used in cloth masks intended for protection from the SARS CoV-2

Influence of Dispositional and Situational Factors on Human Perceptions of Fire Risk

June 25, 2020

Author(s)

Isaac T. Leventon, Justin W. Bonny

Studies of human behavior during emergencies have observed that when presented with situational cues that a hazard may be present, humans can fail to act on this information in a timely manner. Models of human behavior in response to fire-related

Materials for Hydrogen-Based Energy Storage - Past, Recent Progress and Future Outlook

June 25, 2020

Author(s)

Michael Hirscher, Volodymir A. Yartys, Marcello Baricco, Jose Bellosta von Colbe, Didier Blanchard, Jr. Bowman, Darren P. Broom, Craig E. Buckley, Fei Chang, Ping Chen, Young Whan Cho, Jean-Claude Crivello, Fermin Cuevas, William I. F. David, Petra E. de Jongh, Roman V. Denys, Martin Dornheim, Michael Felderhoff, Yaroslav Filinchuk, George E. Froudakis, David M. Grant, Evan MacA. Gray, Bjorn C. Hauback, Teng He, Terry D. Humphries, Torben R. Jensen, Sangryun Kim, Yoshitsugu Kojima, Michel Latroche, Hai-Wen Li, Mykhaylo V. Lototskyy, Joshua W Makepeace, Kasper T. Moller, Lubna Naheed, Peter Ngene, Dag Noreus, Magnus Moe Nygard, Shin-Ichi Orimo, Mark Paskevicius, Luca Pasquini, Dorthe B. Ravnsbaek, M Veronica Sofianos, Terrence J. Udovic, Tejs Vegge, Gavin S. Walker, Colin J. Webb, Claudia Weidenthaler, Claudia Zlotea

NIST Privacy Framework: An Overview

June 25, 2020

Author(s)

Kaitlin R. Boeckl, Naomi B. Lefkovitz

This bulletin summarizes the information found in the voluntary NIST Privacy Framework: A Tool for Improving Privacy through Enterprise Risk Management (Version 1.0). The Privacy Framework is a tool developed in collaboration with stakeholders intended to

Operational Measurement Uncertainty and Bayesian Probability Distribution

June 25, 2020

Author(s)

Raghu N. Kacker

The JCGM documents have undermined the operational concept of uncertainty in measurement established by the GUM and restored the pre-GUM practice of stating possible error relative to the true value, supposedly to align with Bayesian interpretation. It is

Ventilation Impacts on Indoor Aerosol Transport and Current HVAC Recommendations for Re-Opening Buildings

June 25, 2020

Author(s)

Andrew K. Persily, Lisa C. Ng

These presentations will describe how building ventilation rates and other important building airflows impact the fate and transport of indoor aerosols. These airflows, specifically mechanical ventilation, infiltration and natural ventilation, and the

Cobalt Ferrite Nanoparticle Intercalated Carbon Nanotubes for a Nanomagnetic Ultrasensitive Sensor for Cr-VI in Water

June 24, 2020

Author(s)

Tassew Mekuria, Syed Khalid, Kathryn L. Krycka, Markus Bleuel, Himanshu Verma, Haiping Hong, Shashi P. Karna, Dereje Seifu

Nanocomposites of cobalt ferrite (CFO) magnetic nanoparticles intercalated on carbon nanotubes (CNTs) are evaluated as a nanomagnetic ultrasensitive sensor for the environmental toxin, hexavalent chromium (Cr-VI). Specifically, the structural and magnetic

Effect of IF-WS2 Nanolubricant on R134a Boiling on a Reentrant Cavity Surface

June 24, 2020

Author(s)

Mark A. Kedzierski, Lingnan Lin

Media Forensics Challenge Evaluation Overview Talk on ARO Sponsored Workshop on Assured Autonomy

June 24, 2020

Author(s)

Haiying Guan, Jonathan G. Fiscus

The Media Forensics Challenge (MFC) Evaluation is a series of annual evaluations NIST administered to support the evaluation needs of the DARPA MediFor Program from 2016-2020. The objective of MFC is to support the development of media forensic

Net Weights: Visualizing and Quantifying their Contribution to Drug Background Levels in Forensic Laboratories

June 24, 2020

Author(s)

Edward R. Sisco, Matthew E. Staymates, Laura M. Watt

While the drug background in forensic laboratories has been quantified, the processes that most contribute to the background have not been extensively researched. This work presents both qualitative visualization and quantitative analysis of the spread of

Online monitoring and control of a cyber-physical manufacturing process under uncertainty

June 24, 2020

Author(s)

Saideep Nannapaneni, Sankaran Mahadevan, Abhishek Dubey, Yung-Tsun Lee

Recent technological advancements in computing, sensing and communication have led to the development of cyber-physical manufacturing processes, where a computing system monitors the manufacturing process performance in real-time by analyzing sensor data

Self-Assembly of Magnetic Nanoparticles in Ferrofluids on Different Templates Investigated by Neutron Reflectometry

June 24, 2020

Author(s)

Katharina Theis-Brohl, Apurve Saini, Max Wolff, Joseph Dura, Brian B. Maranville, Julie Borchers

This article reviews the self-assembly of magnetite nanoparticles onto solid surfaces. We focus on neutron reflectometry studies providing information on the density and magnetization profiles of buried interfaces. Specific attention is given to the near

STEP File Analyzer and Viewer User Guide (Update 6)

June 24, 2020

Author(s)

Robert Lipman, Soonjo Kwon

The STEP File Analyzer and Viewer opens a STEP (ISO 10303 - STandard for Exchange of Product model data) Part 21 file and (1) generates a spreadsheet or CSV files of all entity and attribute information, (2) creates a visualization (view) of part geometry

Water-Polyamide Chemical Interplay in Desalination Membranes explored by Ambient Pressure X-ray Photoelectron Spectroscopy

June 24, 2020

Author(s)

Sabrina Gericke, William D. Mulhearn, Dana E. Goodacre, Joseph Raso, Daniel J. Miller, Lauryn Carver, Slavomir Nemsak, Osman Karslioglu, Lena Trotochaud, Hendrik Bluhm, Christopher Stafford, Christin Buechner

Reverse osmosis using aromatic polyamide membranes is currently the most important technology for seawater desalination. The performance of reverse osmosis membranes is highly dependent on the interplay of their surface chemical groups with water and water

Can you tell? SSNet - a Sagittal Stratum-inspired Neural Network Framework for Sentiment Analysis

June 23, 2020

Author(s)

Apostol T. Vassilev, Munawar Hasan

When people try to understand nuanced language they typically process multiple input sensor modalities to complete this cognitive task. It turns out the human brain has even a specialized neuron formation, called sagittal stratum, to help us understand

Entangled Polymer Dynamics in Attractive Nanocomposite Melts

June 23, 2020

Author(s)

Erkan Senses, Saeid Darvishi, Madhu Sudan Tyagi, Antonio Faraone

We investigate single chain dynamics of an entangled linear poly (ethylene oxide) melt in presence of well-dispersed attractive nanoparticles using high resolution neutron spectroscopy at particle volume fractions as high as 0.53. The short time dynamics

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