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Displaying 8401 - 8425 of 13224

NONDESTRUCTIVE, NONCONTACT QUANTIFICATION OF CARBON FIBER ALIGNMENT AND ORIENTATION BY HIGH-SPEED MICROWAVE ELLIPSOMETRY FOR TAILORABLE FEEDSTOCK

May 20, 2019
Author(s)
Nina Popovic, Shridar Yarlagadda, Dirk Heider, Edward Garboczi, Christian Long, Nathan Orloff
… of tailorable feedstock for small formed parts. In these composites, the alignment and orientation of the … technique to quantify local alignment and orientation in real time. Such control would enable real-time control of processing variables, resulting in higher quality composites. Here, we discuss high-speed …

NOVEL ZIRCONIA MATERIALS IN DENTISTRY

October 16, 2017
Author(s)
Yu Zhang, Brian R. Lawn
… of the dental ceramics, are increasingly being fabricated in monolithic form for a range of clinical applications, … on the market and is therefore somewhat restricted in the anterior region. This article reviews the progressive … several, often complex, mechanisms of long-term failure in relation to routine laboratory test data is presented as a …

Diagnostics of machine tool linear axes via separation of geometric error sources

October 4, 2017
Author(s)
Gregory W. Vogl, Michael Sharp
… from an inertial measurement unit (IMU) to measure changes in geometric error motions. A linear axis testbed, … deviations with acceptable test uncertainty ratios. In this study, a rail of the linear axis testbed was … during machine tool operations. The rail was degraded in discrete steps from its nominal state (no degradation) to …

Reflective Small Angle Electron Scattering to Characterize Nanostructures on Opaque Substrate

September 22, 2017
Author(s)
Lawrence H. Friedman, Wen-Li Wu, Wei-En Fu, Yunsan Chien
… Feature sizes in integrated circuits (ICs) are often at the scale of 10 nm and are ever shrinking. ICs appearing in today’s computers and hand held devices are perhaps the … accurate dimensional metrology for both development and manufacturing. Techniques in use and continuing to be …

Laser induced fluorescence applied in situ to fiber laser welding of 304L stainless steel for improved sensitivity

July 21, 2017
Author(s)
Brian J. Simonds, Jeffrey W. Sowards, Paul A. Williams
… weld plume is common practice as it is a non-contact, in situ technique. However, the low sensitivity of optical … wavelength laser welding, which is becoming the standard in many industrial operations. Here we demonstrate … applicable even in low-power laser welding or additive manufacturing scenarios. …

Long term stability of ultra high molar mass polyethylene fibres

September 19, 2016
Author(s)
Amanda Forster, Aaron Forster, Joannie Chin, Sylvain H. Petit, Kai-Li Kang, Nicholas G. Paulter Jr., Kirk D. Rice, Don Jenket II, Mohamad Al-Sheikhly
… that allows the polymer to exhibit a superior strength in the axial direction of the fibre. Body armour … fibres, and impact their ability to protect the wearer. In this work, the long term stability of UHMMPE fibres is … was calculated to be approximately 140 kJ/mol. Changes in the oxidation index of this material due to ageing were …

110 Labs in Worlds Largest Interlaboratory Comparison of LED Test Labs improving testing competency to support market transformation

June 1, 2015
Author(s)
Yoshihiro Ohno, Koichi Nara, Peter Bennich, Michael Scholand, Nils Borg
… Solid State Lighting Annex initiated a programme starting in 2011 looking at a global laboratory accreditation scheme. … of products took into account the most important products in the different regional markets, but all test samples … comparison clarified the level of agreement in measurement results for these products, and will help …

Scatterfield Microscopy and the Fundamental Limits of Optical Defect Metrology

April 14, 2015
Author(s)
Richard M. Silver, Bryan M. Barnes, Martin Y. Sohn, Hui Zhou
… Defect inspection remains a critical manufacturing challenge due to the competing requirements … and sensitivity without compromising throughput. In this paper we describe several advanced optical … imaged field offer the possibility to optimize sensitivity in a conventional or high angle optical system. This combined …

A Facile Route to the Synthesis of Monodisperse Nanoscale Liposomes Using 3D Microfluidic Hydrodynamic Focusing in a Concentric Capillary Array

May 14, 2014
Author(s)
Wyatt N. Vreeland, Renee R. Hood, Don L. DeVoe, Francisco J. Atencia, Donna M. Omiatek
… microfluidic hydrodynamic focusing (3D-MHF) in a radially symmetric capillary array. The 3D-MHF flow … unparalleled rates (factor of 104 liposomes/min increase in production rate relative to state-of- the-art liposome … are of tunable size and have a factor of two improvement in polydispersity over previous MHF methods which can be …

Characteristics of Rhodium-Iron Resistance Thermometers And Interpolation Properties From 0.65 K To 24.5561 K

September 12, 2013
Author(s)
Weston L. Tew, Richard Rusby
… thermometers or RIRTs) were first made by H Tinsley & Co in 1969 for applications at low temperatures, below the range … which record and compare the results of experiments in thermometry particularly below 24.5561 K, the triple-point … made and many were calibrated at NPL, NIST and elsewhere. In order to document the resistance-temperature …

AGING-INDUCED ANISOTROPY OF MECHANICAL PROPERTIES IN STEEL PRODUCTS: IMPLICATIONS FOR THE MEASUREMENT OF ENGINEERING PROPERTIES

September 16, 2011
Author(s)
Mark D. Richards, Elizabeth S. Drexler, James R. Fekete
… Strain aging in low-carbon steels is a well-known strengthening … phenomenon, the typical results of which are an increase in yield stress and/or an increase in the extent of … In this paper examples will be used from pipeline manufacturing and automotive body-panel stamping to describe …

Accurate Measurements of Process Gas Flow with Laminar Flow Meters

October 15, 2010
Author(s)
Thiago Cobu, Robert F. Berg, John D. Wright, Michael R. Moldover
We calibrated three models of commercially-manufactured, laminar flow meters (LFMs) with nitrogen at four pressures (100 kPa, 200 kPa, 300 kPa, and 400 kPa) over a 10:1 flow range using NIST’s primary flow standards and a physical model. Without additional

Detecting Chemical Hazards with Temperature-Programmed Microsensors: Overcoming Analytical Problems of Increasing Complexity by Utilizing Multi-Dimensional Databases

July 6, 2009
Author(s)
Douglas C. Meier, Baranidharan Raman, Stephen Semancik
… such as detecting trace quantities of hazardous chemicals in ambient environments composed of varying levels of … data reduction algorithms to identify analytes present in the system. Herein the chemical microsensor platform is … real-time, unsupervised operation. Additional advancements in both device and algorithm are discussed, including …

Determination of Protein Aggregation with Differential Mobility Analysis: Application to IgG Antibody

December 15, 2008
Author(s)
Leonard F. Pease III, John T. Elliott, De-Hao D. Tsai, Michael R. Zachariah, Michael J. Tarlov
… as a method for measuring low-order aggregates of proteins in solution. We demonstrate proof of concept with IgG antibodies. In ES-DMA, aqueous solutions of the antibody protein are … phenomena such as those associated with antibody reagent manufacturing and protein therapeutics. …

Content-Based Assembly Search: A Step Towards Assembly Reuse

November 7, 2007
Author(s)
Ram D. Sriram, A S. Deshmukh, A G. Banerjee, Satyandra K. Gupta
… systems by product development organizations has resulted in the creation of large databases of assemblies. This explosion of assembly data is likely to continue in the future. In many situations, text-based search alone … the design time. Second, a lot of useful design for manufacturing and assembly knowledge is implicitly embedded …

The Direct Patterning of Nanoporous Interlayer Dielectric Insulator Films by Nanoimprint Lithography

October 2, 2007
Author(s)
Hyun Wook Ro, Ronald L. Jones, H Peng, Daniel R. Hines, Hae-Jeong Lee, Eric K. Lin, Alamgir Karim, Do Y. Yoon, D Gidley, Christopher L. Soles
… fabrication processes and significantly reduce the manufacturing costs for semiconductor devices. However, the … suffer from poor mechanical properties, especially in their porous form, raises concerns regarding their … that displays an enhanced modulus after vitrification in both its non-porous and porous forms. An excellent …
Displaying 8401 - 8425 of 13224
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