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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 67 for “"Electromechanical coupling"”.
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STRUCTURE AND PROPERTIES OF PIEZOELECTRIC NANOFIBERS FOR ELECTROMECHANICAL COUPLING APPLICATIONS
… demand flexible materials for efficient electromechanical conversions. With potential to improve flexibility and electromechanical coupling performance, due to the finite size effect and high specific surface areas, one-dimensional (1D) nanostructured piezoelectric materials are …
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Inter-organ Communication in the Gut: Elucidating Electromechanical Coupling across the Gastroduodenal Junction
Electromechanical coupling of the gastroduodenal junction (GDJ) has been indicated as a target for clinical management of disorders of gut-brain interaction (DGBI) and dysmotililty conditions. Rhythmic ‘slow waves’, generated by interstitial cells of Cajal (ICC), and myogenic ‘spikes’ are …
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Emergent functionalities in van der Waals ferroelectrics: photovoltaics, electromechanical coupling, and domain wall conductivity
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Electromechanical Coupling of Distributed Piezoelectric Transducers for Passive Damping of Structural Vibrations: Comparison of Network Configurations
… energy in the electric form. Modular PiezoElectroMechanical (PEM) structures are constituted by continuous elastic beams (or bars) coupled, by means of an array of PZT transducers, to lumped dissipative electric networks. Both refined and homogenized models of those periodic systems are …
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Research on Vibration-AE Fusion Detection Technology for Metal Particle Defect in GIS under Electromechanical Coupling Condition
… of mechanical vibration and PDAE signals. An electromechanical-acoustic equivalent model for piezoelectric vibration-AE measurement is established, and a fusion sensing structure is designed. Simulation analysis clarifies the relationships between structural parameters and measurement …
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Size-dependent Electroelastic Properties of Piezoelectric Nanoplates
… resonators and energy harvesters in nanoelectromechanical systems (NEMS) due to their high electromechanical coupling and unique features at the nano-scale. Piezoelectric nanomaterials have been characterized to possess size-dependent electromechanical coupling properties from both …
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Characterization, Modeling, and Control of Ionic Polymer Transducers
… of active materials that exhibit bidirectional electromechanical coupling. They are `soft' transducers that perform best when the mechanical deformation involves bending of the transducer. Ionic polymers are low voltage actuators -- they only require inputs on the order of 1V and cannot tolerate …
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Design and implementation of MEMS biomechanical sensors for real-life measurements of gait parameters
… due to its high performance, in terms of electromechanical coupling factor, bandwidth, mechanical impedance and sensitivity. An investigation into the capability of MEMS technology in the design and analysis of ultrasonic transducer is reported. The work includes an investigation into …
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Nonlinear vibration energy harvesting by intentional excitation of high-frequency dynamical instability
… (nonlinearizable) nonlinearities and various electromechanical coupling elements is investigated. These elements include electromagnetic and piezoelectric methods of energy conversion. The mechanical system of interest consists of a grounded, weakly damped linear oscillator (primary system) …
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Quantum acoustics with a released thickness-mode mechanical resonator
… challenge in this field is achieving strong electromechanical coupling between the mechanical resonator and the superconducting qubit, while preserving the resonator’s high quality factor. Strong coupling generally favors small mode volumes and often involves metallic components that …
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K-band lithium niobate microelectromechanical system hybrid filters
… in the K-band, which exceeds the limitation of electromechanical coupling on the fractional bandwidth (FBW) of acoustic filters. The hybrid filter utilizes the co-design of electromagnetic (EM) and acoustic to attain wide bandwidth while keeping the advantages of small size and high Q in the …
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Nonlinear Electromechanical Deformation of Isotropic and Anisotropic Electro-Elastic Materials
… invariant theory. Based on the constitutive law, electromechanical stability of the electro-elastic materials is investigated using convexity and polyconvexity conditions. Implementation of the electro-active material model into a commercial finite element software (ABAQUS 6.9.1, PAWTUCKET, RI, …
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Investigation of Zinc Oxide Nanowires for Impedance Based Structural Health Monitoring
… of composite beams by investigating their electromechanical coupling in the form of vibration under the presence of electrical excitation. With the help of a mathematical model, piezoelectric constants are estimated for these samples. A layer of ZnO nanowires were grown on plane woven …
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Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI
… basic physiological building blocks involve the electromechanical coupling between interlinking actin and myosin fibres. Detailed intramuscular behaviour during contraction can be clearly defined when examining a single isolated muscle. However, there are few areas in the human body where single …
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Determination of Frequency-Based Switch Triggers for Optimal Vibration Reduction via Resonance Frequency Detuning
… by the system*s sweep rate, modal damping ratio, electromechanical coupling coefficient, and, most importantly, the trigger (represented here in terms of excitation frequency) that initiates the stiffness state switch. This thesis identifies the optimal frequency-based switch trigger over a range …
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Micromechanics of piezocomposites
… composite materials that enable effective electromechanical properties to be tailored for a specific application. These materials are made by combining conventional piezoelectric ceramics with piezoelectrically passive polymers in a variety of geometrical configurations. As with any …
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Voltage Sensing Mechanism in the Voltage-gated and Proton (H+)-selective Ion Channel Hv1
… first time that Hv1 channels manifest a form of electromechanical coupling VS activation and GAQ pore opening. Second-site mutations of D185 markedly alter GAQ gating without affecting GSH gating, indicating that D185 is required for a late step in the activation pathway that controls opening of …
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TRANSVERSE RESONANCE ORTHOGONAL BEAM (TROB) SINGLE CRYSTAL UNDERWATER TRANSDUCERS
… ultrahigh piezoelectric strain coefficients and electromechanical coupling factors. They are candidate materials for high-performance broadband medical, industrial and underwater transducers involving transmission and reception of large amounts of signals and information. In this research, using …
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Optimization and design of radio frequency piezoelectric MEMS resonators
Radio frequency (RF) microelectromechanical system (MEMS) resonators employing Lamb waves propagating in piezoelectric thin films have recently attracted much attention since they combine the advantages of the bulk acoustic wave (BAW) and surface acoustic wave (SAW) technologies: high phase …
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High quality integrated LiNbO3 acousto-optic platform for visible light spectrum
… LiNbO3 platform can produce a high acousto-optic coupling rate that can be used as a microwave to optical conversion. To have high coupling, we utilized LiNbO3's ultra-high electromechanical coupling for S0 lamb wave mode excitation. We employed LiNbO3's ultra-low optical loss as an interaction …
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