Search Results - "Walsh, Timothy F."

Nonlocal elastic metasurfaces: Enabling broadband wave control via intentional nonlocality by Zhu, Hongfei, Patnaik, Sansit, Walsh, Timothy F., Jared, Bradley H., Semperlotti, Fabio

“…While elastic metasurfaces offer a remarkable and very effective approach to the subwavelength control of stress waves, their use in practical applications is…”
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Total-internal-reflection elastic metasurfaces: Design and application to structural vibration isolation by Zhu, Hongfei, Walsh, Timothy F., Semperlotti, Fabio

“…This letter presents the concept of the Total Internal Reflection metasurface (TIR-MS) which supports the realization of structure-embedded subwavelength…”
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Experimental study of vibration isolation in thin-walled structural assemblies with embedded total-internal-reflection metasurfaces by Zhu, Hongfei, Walsh, Timothy F., Semperlotti, Fabio

“…The concept of total-internal-reflection elastic metasurface (TIR-MS) was recently proposed [1] and employed within flexible planar waveguides in order to…”
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On the broadband vibration isolation performance of nonlocal total-internal-reflection metasurfaces by Zhu, Hongfei, Walsh, Timothy F., Jared, Bradley H., Semperlotti, Fabio

“…The concept of a nonlocal elastic metasurface has been recently proposed and experimentally demonstrated in Zhu et al. (2020). When implemented in the form of…”
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Effectiveness of dry hydrogen peroxide in reducing air and surface bioburden in a multicenter clinical setting by Wright, Don, Christie, Jacqueline, Lawrence, Jordan, Vaughn, Kimberly L., Walsh, Timothy F.

“…To determine the effectiveness of dry hydrogen peroxide (DHP) in reducing environmental bioburden in occupied areas. Prospective environmental cohort study…”
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Directional infrasound sensing using acoustic metamaterials by Rouse, Jerry W., Bowman, Daniel, Walsh, Timothy F.

“…Natural and anthropogenic infrasound may travel vast distances, making it an invaluable resource for monitoring phenomena such as nuclear explosions, volcanic…”
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Large scale parameter estimation problems in frequency-domain elastodynamics using an error in constitutive equation functional by Banerjee, Biswanath, Walsh, Timothy F., Aquino, Wilkins, Bonnet, Marc

“…► We develop an ECE strategy suitable for large scale parameter identification. ► We propose a continuation scheme for accelerating convergence. ► We formulate…”
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A gradient-based optimization approach for the detection of partially connected surfaces using vibration tests by Aquino, Wilkins, Bunting, Gregory, Miller, Scott T., Walsh, Timothy F.

“…The integrity of engineering structures is often compromised by embedded surfaces that result from incomplete bonding during the manufacturing process, or…”
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Novel strategies for modal-based structural material identification by Bunting, Gregory, Miller, Scott T., Walsh, Timothy F., Dohrmann, Clark R., Aquino, Wilkins

“…•Modal-based methods for model calibration in structural dynamics.•Measured modal data to extract structural model parameters for complex…”
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Adipose tissue torsion with localized lymphangiectasia in a Rio Cauca caecilian Typhlonectes natans by Whalen, Laura E. W., Walsh, Timothy F., Steeil, James C., Aziz, Neel, Palmer, Alyssa

“…Objective A female Rio Cauca caecilian Typhlonectes natans (estimated as between 10 and 18 years of age) housed at the Smithsonian National Zoological Park in…”
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Bayesian Optimal Sensor Placement for Damage Detection in Frequency-Domain Dynamics by Chen, Mark J., Sivakumar, Kavinayan, Banyay, Gregory A., Golchert, Brian M., Walsh, Timothy F., Zavlanos, Michael M., Aquino, Wilkins

“…AbstractIdentification and monitoring of structural damage have a growing importance in the maintenance of aging structures. Specifically, an optimal sensor…”
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Solitary Osteochondroma in a Ring-Tailed Lemur (Lemur catta) by Hope, Katharine L, Boedeker, Nancy C, Gordon, Sebastian S, Walsh, Timothy F

“…A 20-y-old, male, ring-tailed lemur (Lemur catta) presented with a large, firm mass on the proximal caudolateral left femur. The animal displayed no clinical…”
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GASTRIC DILATATION VOLVULUS IN ADULT MANED WOLVES (CHRYSOCYON BRACHYURUS) by Hinton, Jenna D, Padilla, Luis R, Joyner, Priscilla H, Schnellbacher, Rodney, Walsh, Timothy F, Aitken-Palmer, Copper

“…Gastric dilatation volvulus (GDV) was identified in six adult maned wolves (Chrysocyon brachyurus) housed at the Smithsonian Conservation Biology Institute in…”
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FATAL GASTRIC DILATION IN TWO ADULT BLACK-FOOTED FERRETS (MUSTELA NIGRIPES) by Hinton, Jenna D, Aitken-Palmer, Copper, Joyner, Priscilla H, Ware, Lisa, Walsh, Timothy F

“…Acute gastric dilation resulting in death was identified in two adult black-footed ferrets (Mustela nigripes) housed at the Smithsonian Conservation Biology…”
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CALCINOSIS CIRCUMSCRIPTA IN A COHORT OF RELATED JUVENILE AFRICAN LIONS (PANTHERA LEO) by Bauer, Kendra L, Sander, Samantha J, Steeil, James C, Walsh, Timothy F, Neiffer, Donald L

“…Three juvenile, genetically related African lions (Panthera leo) were evaluated for discrete dome-shaped subcutaneous masses present over the proximal lateral…”
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Paratuberculosis in a mandrill (Papio sphinx) by Zwick, LS, Walsh, TF, Barbiers, R, Collins, MT, Kinsel, MJ, Murnane, RD

“…Zoological Pathology Program, University of Illinois College of Veterinary Medicine, Loyola University Medical Center, Maywood, IL 60153, USA. A 2.5-year-old…”
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HEPATOCELLULAR CARCINOMA IN CAPTIVE SLENDER TAILED MEERKATS (SURICATA SURICATTA): 5 CASES by Marrow, Judilee C, Basu, Puja, Walsh, Timothy F, Siegal-Willott, Jessica L

“…Hepatocellular carcinoma was diagnosed in five slender tailed meerkats (Suricata suricatta) housed at the Smithsonian Institution's National Zoological Park…”
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Orthotropic elastic material inversion through PDE constrained optimization by Guddati, Murthy N., Walsh, Timothy F.

“…This paper addresses the problem of orthotropic material inversion from mechanical responses, with particular emphasis on the parametrization of the modulus…”
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GRIDS-Net: Inverse shape design and identification of scatterers via geometric regularization and physics-embedded deep learning by Nair, Siddharth, Walsh, Timothy F., Pickrell, Greg, Semperlotti, Fabio

“…This study presents a deep learning based methodology for both remote sensing and design of acoustic scatterers. The ability to determine the shape of a…”
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Adjoint-based, large-scale optimization of metamaterials by Bunting, Gregory, Walsh, Timothy F.

“…Harsh shock and vibration environments are commonly encountered in engineering applications involving dynamic loading. Acoustic/elastic metamaterials are…”
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