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Displaying 13351 - 13375 of 17285

STEP-NC Process Planning for Powder Bed Fusion Additive Manufacturing

October 20, 2022
Author(s)
Fahad Milaat, Paul Witherell, Martin Hardwick, Ho Yeung, Vincenzo Ferrero, Laetitia Monnier, Matthew Brown
Powder bed fusion (PBF) is an additive manufacturing (AM) technology that uses high-power beams to fuse powder material into layers of scanned patterns, thus producing parts with great geometric complexity. For PBF, the selection of appropriate process

Implementation and Evaluation of a WLAN IEEE 802.11ay Model in Network Simulator ns-3

June 23, 2021
Author(s)
Hany Assasa, Nina Grosheva, Tanguy Ropitault, Steve Blandino, Nada T. Golmie, Joerg Widmer
The IEEE Task Group ay (TGay) has recently defined new physical and medium access control specifications to design the next generation wireless standard in the 60 GHz band, the so-called IEEE 802.11ay. Build upon its 802.11ad predecessor, IEEE 802.11ay

Absolute energies and emission line shapes of the x-ray lines of lanthanide metals

February 1, 2021
Author(s)
Joseph Fowler, Galen O'Neil, Bradley K. Alpert, Douglas Bennett, Edward V. Denison, William Doriese, Gene Hilton, Lawrence T. Hudson, Young I. Joe, Kelsey Morgan, Daniel Schmidt, Daniel Swetz, Csilla I. Szabo-Foster, Joel Ullom
… and holmium. The spectrometer also surveys numerous x-ray standards in order to establish an absolute-energy …

Particle Size Distributions for Cellulose Nanocrystals Measured by Transmission Electron Microscopy: An Interlaboratory Comparison

October 6, 2020
Author(s)
John E. Bonevich, Juris Meija, Bushell Michael, Martin Couillard, Kai Cui, Johan Foster, Douglas M. Fox, Markus Heidelmann, Byong Chon Park, Lingling Ren, Aleksandr B. Stefaniak, Ralf Theissmann, Natalia de Val Alda, Linda Johnston
Particle size is one of the key parameters that must be measured to ensure reproducible production of cellulose nanocrystals (CNCs) from various types of cellulose biomass and by different producers. It is also important for achieving reliable performance

Design and Characterization of an Architecturally Perfect Family of Linear Low-Density Polyethylenes (LLDPEs) by Multi-Detector Size Exclusion Chromatography

March 27, 2020
Author(s)
Sara V. Orski, Luke Kassekert, Wesley Farrell, Grace A. Kenlaw, Marc Hillmyer, Kathryn L. Beers
… using either 1-octene or polyethylene/polypropylene standards. A systematic decrease of intrinsic viscosity is … can minimize local polydispersity and generate improved standards for determining branching content in commercial …

Building Open Access to Research (OAR) data infrastructure at NIST

July 8, 2019
Author(s)
Gretchen R. Greene
As a National Metrology Institute (NMI), the National Institute of Science and Technology (NIST) scientists, engineers and technology experts conduct research across a full spectrum of physical science domains. This is performed as a public service within

Tolerances and Uncertainty in Robotic Systems

November 8, 2017
Author(s)
Frederick M. Proctor, John L. Michaloski, Marek Franaszek
… and measurement uncertainty from sensors into operations. Standards such as ISO 10303 (STEP), the Quality Information … how these requirements are being met by existing standards, and suggests improvements that can enable more …
Displaying 13351 - 13375 of 17285
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