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Search Publications

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Displaying 8076 - 8100 of 74030

Determination of Ceramic Flaw Populations from Component Strengths

June 3, 2019
Author(s)
Robert F. Cook, Frank W. DelRio
A procedure is outlined for determining the population of flaws in manufactured ceramics from strength measurements of sampled components. The broad applicability of the procedure is demonstrated in a quantitative manner, using strength measurements from a

Diaphragmless Single Pulse Shock Tube for High-Temperature Chemical Kinetics Studies

June 3, 2019
Author(s)
William Sean McGivern, Iftikhar A. Awan, Jeffrey A. Manion
Single pulse shock tubes are effective tools for measuring chemical kinetics at high temperatures, typically (900–1400) K. However, the use of a diaphragm for shock generation leads to significant shock-to- shock inconsistencies in temperature for a

Modifying interface cure properties of hierarchical CNT composites.

June 3, 2019
Author(s)
Ajay Krishnamurthy, Qi An, Aaron M. Forster
Hierarchical carbon nanotube (CNT) grafted fiber-reinforced polymer composites (FRP) display multifunctional capabilities such as enhanced mechanical and electrical properties that enable their use in structural applications. These properties are achieved

Self-organized nonlinear gratings for ultrafast nanophotonics

June 3, 2019
Author(s)
Daniel D. Hickstein, David R. Carlson, Haridas Mundoor, Jacob B. Khurgin, Kartik A. Srinivasan, Daron A. Westly, Abijith S. Kowligy, Ivan I. Smalyukh, Scott A. Diddams, Scott B. Papp
We present the first demonstration of automatically quasi-phase-matched second-harmonic generation using femtosecond pulses. The high-confinement geometry of silicon-nitride nanophotonic waveguides provides group-velocity matching, which enables efficient

Electronics Supply Chain Integrity Enabled by Blockchain

June 1, 2019
Author(s)
Xiaolin Xu, Fahim Rahman, Bicky Shakya, Apostol Vassilev, Domenic Forte, Mark Tehranipoor
Electronic systems are ubiquitous today, playing an irreplaceable role in our personal lives as well as in critical infrastructures such as power grid, satellite communication, and public transportation. In the past few decades, the security of software

Fracture Mechanics Approach to Splitting in Low Spring Index Cold Coiling Process

June 1, 2019
Author(s)
Y. Prawoto, S. Manville, T. Sakai, L. Lee, M. Tanaka, Thomas H. Gnaupel-Herold
This paper is an attempt to understand the coil splitting phenomena by means of fracture mechanics. The methods used combines the residual stress measurement with neutron and finite element analysis. The support of the metallurgical evaluation is used as

Large-Signal Network Analysis for Over-the-Air Test of Up-Converting and Down-Converting Phased Arrays

June 1, 2019
Author(s)
Alec Weiss, Dylan Williams, Jeanne Quimby, Rod Leonhardt, Thomas Choi, Zihang Chen, Kate Remley, andreas Molisch, Ben Jamroz, Jake Rezac, Peter Vouras
We explore large-signal network analysis for the over-the-air test of up-converting and down-converting phased arrays. The approach first uses a vector network analyzer to calibrate the impulse response of an over-the-air test system at RF. The vector
Displaying 8076 - 8100 of 74030