Výsledky vyhledávání - "Douglas C. Markley"

Material selection for acoustic radiators that are light and stiff

Autor: Scott P. Porter, D. J. Van Tol, Richard J. Meyer, Douglas C. Markley

Publikováno v: The Journal of the Acoustical Society of America. 129:138-142

The headmass is a key element in tonpilz transducer design. As an acoustic radiator, a successful headmass must be built from a material that is both light and stiff. To assess the suitability of ceramics for this application, the authors used the me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da45d6b9c2c33d93aba3fe34910b5a5f
https://doi.org/10.1121/1.3514420

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Comparison of the properties of tonpilz transducers fabricated with ⟨001⟩ fiber-textured lead magnesium niobate-lead titanate ceramic and single crystals

Autor: Richard J. Meyer, Gary L. Messing, Douglas C. Markley, Kristen H. Brosnan

Publikováno v: The Journal of the Acoustical Society of America. 126:2257-2265

Tonpilz transducers are fabricated from 001 fiber-textured 0.72Pb(Mg(1/3)Nb(2/3))O(3)-0.28PbTiO(3) (PMN-28PT) ceramics, obtained by the templated grain growth process, and PMN-28PT ceramic and Bridgman grown single crystals of the same composition. I

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https://doi.org/10.1121/1.3238158

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Miniature Multimode Monolithic Flextensional Transducers

Autor: Anne-Christine, Hladky-Hennion, A Erman, Uzgur, Douglas C, Markley, Ahmad, Safari, Joe K, Cochran, Robert E, Newnham

Publikováno v: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2007, 54, pp.1992-2000. ⟨10.1109/TUFFC.2007.493⟩
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2007, 54, pp.1992-2000. ⟨10.1109/TUFFC.2007.493⟩

HLADKY-HENNION, Anne-Christine/0000-0001-6339-8448 WOS: 000250278400011 PubMed: 18019236 Traditional flextensional transducers classified in seven groups based on their designs have been used extensively in 1-100 kHz range for mine hunting, fish find

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https://doi.org/10.1109/tuffc.2007.493

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Noninvasive Ultrasonic Transdermal Insulin Delivery in Rabbits Using the Light-Weight Cymbal Array

Autor: Douglas C. Markley, R.J. Meyer, V. Nayak, B. Snyder, Robert E. Newnham, Nadine Barrie Smith, Seungjun Lee

Publikováno v: Diabetes Technology & Therapeutics. 6:808-815

Recent studies have shown that ultrasound-mediated transdermal drug delivery offers a promising potential for noninvasive drug administration. The purpose of this study was to demonstrate ultrasonic transdermal delivery of insulin in vivo using rabbi

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https://doi.org/10.1089/dia.2004.6.808

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Materials for High Performance Cymbal Transducers

Autor: Erman Uzgur, Richard J. Meyer, Robert E. Newnham, Aydin Dogan, Anne C. Hladky-Hennion, Douglas C. Markley

Publikováno v: Journal of Electroceramics. 13:403-407

International Conference on Electroceramics (ICE 2003) -- AUG 03-07, 2003 -- MIT, Cambridge, MA
WOS: 000226236100065
The effects of materials on the performance of the cymbal-type flextensional transducers were investigated under in-air and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::287bf1f537db255239edec88d121c1df
https://doi.org/10.1007/s10832-004-5132-9

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Feasibility Of Miniature High-Frequency Piezoelectric Ceramic Hollow Spheres For Exposimetry And Tissue Ablation

Autor: Richard J. Meyer, Douglas C. Markley, Robert E. Newnham, Nadine Barrie Smith, Osama M. Al-Bataineh

Publikováno v: Materials Research Innovations. 8:78-83

Miniature, high frequency piezoelectric ceramic hollow spheres were evaluated for potential use as hydrophones for exposimetry of high intensity ultrasound fields and as minimally invasive tissue ablation devices. Spheres with diameters ranging from

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https://doi.org/10.1080/14328917.2004.11784834

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[Untitled]

Autor: Richard J. Meyer, Thomas C. Montgomery, Douglas C. Markley, Robert E. Newnham, W. Jack Hughes

Publikováno v: Journal of Electroceramics. 8:163-174

A miniature flextensional transducer, the “cymbal,” is an emerging underwater transducer technology for large area and restricted volume transmit and receive arrays. The performance of the device is being evaluated for a number of applications re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a1c876a9a85d2b658021bb16f44cf699
https://doi.org/10.1023/a:1020512231158

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Processing of Miniature Hollow Sphere Transducers

Autor: Sedat Alkoy, Robert E. Newnham, Richard J. Meyer, J. Zhang, Douglas C. Markley, J.K. Cochran

Publikováno v: Integrated Ferroelectrics. 42:235-243

During the past two decades, we have designed and fabricated a large family of composite ferroelectrics for use as sensors, actuators, and transducers. These devices employ stress and strain amplification mechanisms and provide superior acoustic matc

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https://doi.org/10.1080/713718147

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Performance of transducers with segmented piezoelectric stacks using materials with high electromechanical coupling coefficient

Autor: Douglas C. Markley, Stephen C. Thompson, Richard J. Meyer

Underwater acoustic transducers often include a stack of thickness polarized piezoelectric material pieces of alternating polarity interspersed with electrodes, bonded together and electrically connected in parallel. The stack is normally much shorte

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