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Displaying 5926 - 5950 of 73830

Evaluating the Impact of Contactless Fingerprint Imagery Spatial Loss on Matcher Performance

September 23, 2021
Author(s)
Shahram Orandi, John M. Libert, Bruce Bandini, Kenneth Ko, John Grantham, Brian J. Cochran, Craig I. Watson
Observations in previous studies have shown that contactless capture devices may be prone to capturing superfluous data (e.g., fingernail or finger background), distortion and imaging artifacts especially around the periphery of the captured fingerprint

Solid-State Transformation of an Additive Manufactured Inconel 625 Alloy at 700 degC

September 23, 2021
Author(s)
Fan Zhang, Jan Ilavsky, Greta Lindwall, Mark R. Stoudt, Lyle E. Levine, Andrew J. Allen
Inconel 625, a nickel-based superalloy, has drawn much attention in the emerging field of additive manufacturing (AM) because of its excellent weldability and resistance to hot cracking. The extreme processing condition of AM often introduces enormous

Surface topography process signatures in nickel superalloy 625 additive manufacturing

September 23, 2021
Author(s)
Jason Fox, Angela Allen, Brigid Mullany, Ed Morse, Romaine Isaacs, Marc Lata, Aarush Sood, Christopher Evans
Prior analyses of surface measurements performed – by several groups – on laser powder bed fused metals have tended to use ISO standard short wavelength filters and focus on weld tracks, "chevrons" (melt pool wake), and particles. This work, utilizing two

The structure of medium-scale propane pool fires

September 23, 2021
Author(s)
Ryan Falkenstein-Smith, Kunhyuk Sung, Anthony Hamins
A series of time-averaged temperature, velocity, and gas species measurements are made along the centerline of propane fires established on a 37 cm diameter gas burner situated in a quiescent environment. Fires with heat release rates of 20 kW and 34 kW

Toward specification of complex additive manufactured metal surfaces for optimum heat transfer

September 23, 2021
Author(s)
Kuldeep Mandloi, Christopher Evans, Jason Fox, Harish Cherukuri, Jimmie Miller, Angela Allen, David Deisenroth, Alkan Donmez
Metal additive manufacturing (AM) offers the possibility of incorporating cooling channels into components in high-temperature applications. Additionally, it has the prospect of optimizing cooling channel geometry unconstrained by geometric limitations of

Baseline Control Systems in the Intelligent Building Agents Laboratory

September 22, 2021
Author(s)
Amanda Pertzborn, Daniel Veronica
The goal of the Embedded Intelligence in Buildings program at the National Institute of Standards and Technology (NIST) is to develop and deploy advances in measurement science that will improve building operations to achieve lower operating costs

Progress towards comparison of quantum and classical vacuum standards

September 22, 2021
Author(s)
Daniel Barker, Nikolai Klimov, Eite Tiesinga, James A. Fedchak, Julia Scherschligt, Stephen Eckel
We present our progress towards a comparison of NIST's cold atom primary vacuum standard and a dynamic expansion vacuum standard. The cold atom vacuum standard (CAVS) converts the loss rate of atoms from a magnetic trap to a vacuum pressure using ab initio

Quantitative Craniofacial Analysis and Generation of Human Induced Pluripotent Stem Cells for Muenke Syndrome: A Case Report

September 22, 2021
Author(s)
Fahad Kidwai, Byron Mui, Konstantinia Almpani, Priyam Jani, Cyrus Keyvanfar, Kulsum Iqbal, Sriram Paravastu, Deepika Arora, Pamela Orzechowski, Randall Merling, Barbara Mallon, Jeremiah Woodcock, Vamsee Myneni, Moaz Ahmad, Paul Kruszka, Maximilian Muenke, Pamela Robey, Janice Lee
In this case report, we focus on Muenke syndrome (MS), a disease caused by the p.Pro250Arg variant in fibroblast growth factor receptor 3 (FGFR3) and characterized by uni- or bilateral coronal suture synostosis, macrocephaly without craniosynostosis

Wireless Time Sensitive Networking for Industrial Collaborative Robotic Workcells

September 22, 2021
Author(s)
Susruth Sudhakaran, Karl Montgomery, Mohamed Hany, Dave Cavalcanti, Rick Candell
In this paper, we describe a collaborative robotic workcell testbed enabled by Wireless Time Sensitive Networking (WTSN) technologies and discuss deployment, performance measurement and management guidelines challenges. We detail the methodologies for

Design and Experimentation Guidelines for DER's Emulation Testbed

September 21, 2021
Author(s)
Hasnae Bilil, Anfal Hathah, Abdella Battou
Due to the increasing integration of distributed energy resources (DERs) into the national grid, research is needed to understand high DER penetration in relation to grid reliability and stability. Emulation-based research is a viable option to consider

Effect of Chlorine and Chromium on Sulfur Solubility in Low-Activity Waste Glass

September 21, 2021
Author(s)
Tongan Jin, Eden Rivers, Dongsang Kim, Timothy Droubay, Evan Jahrman, Derek Mar, Brigitte Weese, Gerald Seidler, Albert Kruger
According to an empirical sulfur solubility model developed from over 200 simulated low-activity waste (LAW) glasses, chlorine and chromium show strong effects on lowering sulfur solubility in glass. This work investigates the saturation concentrations of

Measuring Tie Chains and Trapped Entanglements in Semicrystalline Polymers

September 21, 2021
Author(s)
Amanda G. McDermott, Paul DesLauriers, Jeff Fodor, Ronald L. Jones, Chad R. Snyder
A label-free method for quantifying stress-transmitter (or elastically effective molecule) content (p) in semicrystalline polymers, including both tie molecules and bridging entanglements, is developed and demonstrated based on swelling with deuterated

STEM-in-SEM: A Re-Emerging Material Measurement Approach

September 21, 2021
Author(s)
Bob R. Keller
Analytical STEM-in-SEM has undergone a striking resurgence in terms of both methodology development and applications over the past 10 to 15 years, driven in part by the significant technological potential promised by low-dimensional structures such as
Displaying 5926 - 5950 of 73830
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