Results 41 to 50 of about 1,987,184 (244)

Study on Vibration Characteristics of Functionally Graded Material Composite Spherical Piezoelectric Transducer

Sensors
Non-uniform composite structures for transducers exhibit considerable potential in enhancing impedance matching and efficiency. Here, a functionally graded material composite spherical piezoelectric transducer (FGM-cSPT) is proposed, and a three-port ...
Sha Wang, Junjie Shan
doaj   +1 more source

Sensor-less parameter estimation of electromagnetic actuator for shunt damping

Nihon Kikai Gakkai ronbunshu, 2015
Electromagnetic shunt damping is a sensor-less passive damping technique using an electromagnetic actuator. The accurate values of the parameters of the system are essentially required for designing a controller in the damping technique.
Toru IKEGAME, Kentaro TAKAGI, Tsuyoshi INOUE, Ichiro JIKUYA   +3 more
doaj   +1 more source

Repeated exercise stress impairs volitional but not magnetically evoked electromechanical delay of the knee flexors [PDF]

, 2012
The effects of serial episodes of fatigue and recovery on volitional and magnetically evoked neuromuscular performance of the knee flexors were assessed in twenty female soccer players during: (i) an intervention comprising 4x35s maximal static exercise;
Bailey, A, Roger Eston, Eston, R, Minshull, Claire, Bailey, A., Rees, D., Claire Minshull, Minshull, C, Eston, R., Nigel Gleeson, Rees, D, Dai Rees, Gleeson, N, Andrea Bailey, Gleeson, Nigel   +14 more
core   +1 more source

Sub‐Nanometer Curvature Unlocks Quantum Orbital Flexoelectricity in Graphene

Advanced Materials, EarlyView.
In self‐assembled, reproducible, large‐area, quasi‐pristine graphene nanowrinkles, extreme curvature forces out‐of‐plane π‐electrons toward hybridization, driving a transition from classical to quantum orbital flexoelectricity. As curvature approaches the fundamental physical limit set by the C─C bond length, the resulting polarization increases by ...
Sathvik Ajay Iyengar, James G. McHugh, Jonathan P. Salvage, Robert Vajtai, Venkataramana Gadhamshetty, Alan B. Dalton, Manoj Tripathi, Pulickel M. Ajayan, Vincent Meunier   +8 more
wiley   +1 more source

A Study of the Properties of a Piezoelectric Ceramic Plate in the Symmetric Fixation Mode

IEEE Access, 2018
Piezoelectric power generation is commonly used to power wireless sensor nodes in vibration environments. A common piezoelectric power generation device is the piezoelectric ceramic plate (PCP), which is often fixed in the form of a cantilever beam ...
Benliang Hao, Gongbo Zhou, Zhencai Zhu, Ping Zhou, Wei Li   +4 more
doaj   +1 more source

Above Room Temperature Ferroelectricity in Epitaxially Strained KTaO3

Advanced Materials, EarlyView.
Through precise epitaxial engineering, the cubic and paraelectric KTaO3${\rm KTaO}_3$ is transformed into a robust ferroelectric. By leveraging lattice‐mismatched substrates to apply controlled epitaxial strain, a stable ferroelectric ground‐state is achieved with a transition temperature as high as 475 K, establishing KTaO3${\rm KTaO}_3$ as a highly ...
Tobias Schwaigert, Salva Salmani‐Rezaie, Sankalpa Hazra, Utkarsh Saha, Maya Ramesh, Aiden Ross, Betül Pamuk, Long‐Qing Chen, David A. Muller, Darrell G. Schlom, Venkatraman Gopalan, Kaveh Ahadi   +11 more
wiley   +1 more source

Design and analysis of innovative multi-frequency ultrasonic probe characteristics

Scientific Reports
This study presents the development of a novel multifrequency ultrasound probe distinguished by its broad bandwidth and high sensitivity. A comprehensive investigation was conducted using theoretical analysis, numerical simulations, and experimental ...
Yu-Lin Song, Tzu-Zin Lin, Shih Hsun Tu, Alexander Stiegler   +3 more
doaj   +1 more source

Effect of Filling Material Properties on 1-3 Piezoelectric Composite Performance

Micromachines
The 1-3 piezoelectric composite is the key component of the acoustic transducer, which is widely used in detection, due to the high energy conversion efficiency, cheap raw material, and low aging. To reveal the influence of epoxy mixture, used to connect
Yao Liu, Yang Zhou, Zhigang Zhao, Jinjie Zhou   +3 more
doaj   +1 more source

Direct Growth of 2D Bilayers on Au(111) for Low‐Coercive Sliding Ferroelectricity

Advanced Materials, EarlyView.
Controlled CVD growth of stacking‐defined bilayer ReS2 on Au(111) enables parallel‐stacked bilayers with intrinsic sliding ferroelectricity, a strong piezoelectric response, and an ultralow coercive voltage. Atomic‐resolution imaging and in situ measurements further reveal the decisive role of clean interfaces in achieving low‐barrier ferroelectric ...
Honglin Chen, Ke Yang, Yuhuan Li, Lingli Huang, Tianren Chen, Ming Yang, Jiong Zhao, Thuc Hue Ly   +7 more
wiley   +1 more source

Polar Wurtzite NbAlN: A Transition‐Metal Nitride Alloy for Polarization‐Engineered GaN Heterostructures

Advanced Materials, EarlyView.
A novel polar wurtzite alloy, NbAlN, is demonstrated as a transition‐metal‐containing polar barrier for GaN heterostructures. Nb atoms form coherent nanoscale enrichment within the wurtzite lattice without disrupting metal polarity. This study demonstrates that transition metals can be integrated into polar nitrides to enable polarization‐related ...
Atsushi Kobayashi, Souta Kurogi, Tomoya Okuda, Riku Kikuchi, Yusuke Wakamoto, Kouei Kubota, Hikaru Sasaki, Kazuhisa Ikeda, Kanako Shojiki, Takahiro Kawamura, Toru Akiyama, Takehito Seki, Takuya Maeda   +12 more
wiley   +1 more source