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Displaying 51 - 75 of 2933

The Fundamental Physical Constants

August 1, 2000
Author(s)
Peter J. Mohr, Barry N. Taylor
… thereafter, in 1969, CODATA established the Task Group on Fundamental Constants to periodically provide the scientific … in a searchable database provided by the Fundamental Constants Data Center of the NIST Physics. … CODATA, fine-structure constant, fundamental constants, molar gas constant, Planck constant, …

Sensitivity of a Plate Pyroelectric Detector to Ambient Acoustic Noise: The Significance of the Perfectly-Clamped Mounting Condition

January 1, 2004
Author(s)
John H. Lehman, Harald Gnewuch, Chris Pannell
… The unwanted sensitivity of a plate pyroelectric detector to airborne acoustic noise is critically dependent on the mounting conditions for the plate. We consider a plate in an isotropic acoustic pressure field oscillating at … domain engineering, ferroelectric, mounting conditions, plate deformation, pyroelectric detector strain …

Historical Review of the Metered Section Area for Guarded Hot Plates

December 31, 2019
Author(s)
Robert R. Zarr, Stacy M. Bruss, David McElroy
… of the calculation techniques is presented for round plates having diameters from 250 mm to 1000 mm, a … are not negligible because large gaps (4 mm) on small plates (250 mm) can have an effect of 10 %, or more, on the … Review of the Metered Section Area for Guarded Hot Plates …

Design Concepts for a New Guarded Hot Plate Apparatus for Use Over an Extended Temperature Range

October 1, 2002
Author(s)
D R. Flynn, Robert R. Zarr, Mahn-Hee Hahn, William M. Healy
… of Standards and Technology is building a new guarded hot plate apparatus (GHP) for use at temperatures from 90 K to … thermometry wells, and sensor leads coming from the hot plate and the cold plates; provision of a system to provide a … between the specimens and the contacting hot and cold plate surfaces; provision of an accurate system for in-situ …

Thermal Modeling of Multiple-Line-Heat-Source Guarded Hot Plate Apparatus

October 1, 2002
Author(s)
William M. Healy, D R. Flynn
… and Technology is building an advanced-design guarded hot plate apparatus of advanced design to provide very accurate … errors and uncertainties. In an idealized guarded hot plate apparatus, the effective thermal conductivity is simply computed from the measured power input to the meter plate heater, the effective area of the meter plate, the …

Fatigue Pre-Cracking Curved Wide Plates in Bending

September 27, 2010
Author(s)
Mark D. Richards, Timothy S. Weeks, Joseph D. McColskey, Bo Wang, Yong-Yi Wang
… closed form solutions for stress-intensity (K) for flat plates in bending can be used to approximate the K for CWP … Fatigue Pre-Cracking Curved Wide Plates in Bending …

Small Business Information Security: The Fundamentals

November 3, 2016
Author(s)
Patricia R. Toth, Celia Paulsen
… small businesses. This document is intended to present the fundamentals of a small business information security program … small business, information security, cybersecurity, fundamentals … Small Business Information Security: The Fundamentals …

WELD TRACK DISTORTION IN LASER POWDER BED FUSION OF NICKEL SUPERALLOY 625

July 11, 2022
Author(s)
Jason Fox, Christopher Evans, Aarush Sood, Romaine Isaacs, Brigid Mullany, Angela Allen, Ed Morse
… high temperature alloys can be used. This work focuses on nickel super alloy 625 (IN625) and explicitly on … laser powder bed fusion, nickel superalloy 625, surface texture … WELD TRACK DISTORTION IN LASER POWDER BED FUSION OF NICKEL SUPERALLOY 625 …

Constants, Fundamental

October 16, 2008
Author(s)
Barry N. Taylor, Peter J. Mohr
… for the romance of the next decimal place, or why the fundamental physical constants are important and why their … (2) how a self-consistent set of best values of the fundamental constants is obtained, with emphasis on the 2002 … recommended values of the fu, CODATA, data analysis, fundamental constants, least-squares adjustments …

Controlled Formation and Resistivity Scaling of Nickel Silicide Nanolines

February 25, 2009
Author(s)
Bin Li, Zhiquan Luo, Paul S. Ho, Li Shi, Lew Rabenberg, JiPing Zhou, Richard A. Allen, Michael W. Cresswell
… We demonstrate a top-down method to fabricate nickel mono-silicide (NiSi) nanolines with smooth side walls … electron transport, nickel silicide, resistance, nano-lines, fabrication, surface … Controlled Formation and Resistivity Scaling of Nickel Silicide Nanolines …

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
… wake), and particles. This work, utilizing two sets of nickel superalloy 625 samples fabricated in an EOS M290 three … Laser Powder Bed Fusion, Nickel Superalloy, Surface structure, Microstructure … Surface topography process signatures in nickel superalloy 625 additive manufacturing …

Phase Composition and Phase Transformation of Additively Manufactured Nickel Alloy 718 AM Bench Artifacts

February 5, 2024
Author(s)
Fan Zhang, Aaron Johnston-Peck, Lyle E. Levine, Michael Katz, Kil-Won Moon, Maureen E. Williams, Sandra W. Young, Andrew J. Allen, Olaf Borkiewicz, Jan Ilavsky
… focuses on the phase composition and phase evolution of AM nickel alloy 718, a nickel-based superalloy, to provide benchmark data essential … the atomic and microstructural transformations of AM nickel alloy 718, thereby enhancing the reliability and … Benchmark, Additive Manufacturing, Nickel-based super alloy, X-ray diffraction, Transmission …

Using Finite Element Analysis to Design a New Guarded Hot Plate Apparatusfor Measuring the Thermal Conductivity of Insulating Materials

October 1, 2001
Author(s)
William M. Healy
… Standards and Technology (NIST) is developing aguarded hot plate apparatus to measure the thermal conductivity of … temperatures of the plates, the heat input to the hotter plate, and the thickness of the specimen. In order for this apparatus to provide accurate results, however, each plate must be maintained at a nearly uniform temperature, and …

A nonlinear model for gusset plate connections

March 15, 2014
Author(s)
Dat Duthinh, Chiara Crosti
… Bridges, connections, finite-element analysis, gusset plate, linear springs, steel truss. … A nonlinear model for gusset plate connections …

Predictive modeling and optimization of multi-track processing for laser powder bed fusion of nickel alloy 625

November 14, 2016
Author(s)
Luis Criales, Yigit Arisoy, Brandon Lane, Shawn P. Moylan, Alkan Donmez, Tugrul Ozel
… processing of laser powder bed fusion (L-PBF) of nickel 625 alloy powder material. Multi-track laser … occurs, is determined. Designed experiments on L-PBF of nickel alloy 625 powder material are conducted to measure the … Selective Laser Melting, Nickel alloy 625, Finite Element Method, Powder Metals, …

Trapping Highly Charged Ions: Fundamentals and Applications

April 1, 2000
Author(s)
John D. Gillaspy
… Fundamentals and applications for trapping highly charged … Trapping Highly Charged Ions: Fundamentals and Applications … Trapping Highly Charged Ions: Fundamentals and Applications …
Displaying 51 - 75 of 2933
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