Results 1 to 10 of about 10,784 (189)

Antisymmetric Lamb Wave Simulation Study Based on Electromagnetic Acoustic Transducer with Periodic Permanent Magnets [PDF]

open access: yesSensors, 2023
Due to its multi-mode and dispersion characteristics, Lamb waves cause interference to signal processing, which profoundly limits their application in nondestructive testing.
Lianren Du, Ruizhen Gao, Xiaojuan Jia
doaj   +2 more sources

Use of acoustic cardiography to assess left ventricular electromechanical synchronization during left bundle branch pacing [PDF]

open access: yesHeart Rhythm O2, 2023
Background: Left bundle branch pacing (LBBP) is a physiological pacing that captures the main left bundle or its proximal branch. Electromechanical activation time (EMAT) is an acoustic cardiographic metric that provides a simple method for evaluating ...
Xianhao Wu, MS   +7 more
doaj   +2 more sources

Study and Optimal Design of the Integrated 37° Unidirectional SV-EMAT for Rapid Rail Flaw Detection [PDF]

open access: yesSensors
The problem of poor coupling and wheel breakage is a critical issue in the rapid inspection of rails using contact piezoelectric ultrasonic technology for trolleys and vehicles.
Wei Yuan
doaj   +2 more sources

Internal and External Pipe Defect Characterization via High-Frequency Lamb Waves Generated by Unidirectional EMAT [PDF]

open access: yesSensors, 2023
Periodic permanent magnet(PPM) electromagnetic acoustic transducers (EMATs) are commonly employed for axial defect inspection in pipelines.
Xu Zhang   +7 more
doaj   +2 more sources

Protocol to discover machine-readable entities of the ecosystem management actions taxonomy [PDF]

open access: yesSTAR Protocols
Summary: The ecosystem management actions taxonomy (EMAT) consists of actions taken by humans and wildlife that affect an ecosystem. Here, I present a protocol for discovering machine-readable entities of the EMAT.
Timothy C. Haas
doaj   +2 more sources

High Temperature Shear Horizontal Electromagnetic Acoustic Transducer for Guided Wave Inspection [PDF]

open access: yesSensors, 2016
Guided Wave Testing (GWT) using novel Electromagnetic Acoustic Transducers (EMATs) is proposed for the inspection of large structures operating at high temperatures.
Maria Kogia   +7 more
doaj   +4 more sources

New psychometric evidence for the thesis advisor abuse scale (EMAT) in Peruvian university students based on classic and modern procedures [PDF]

open access: yesHeliyon
Although evidence of mistreatment toward university students in the academic field has been reported for several years, its study in the context of the development of undergraduate research is still emerging.
Oscar Mamani-Benito   +5 more
doaj   +2 more sources

EMAT Evaluation of Thin Conductive Sheets

open access: yesAdvances in Electrical and Electronic Engineering, 2006
At present a non-destructive testing of conducting materials becomes very important one in connection with monitoring and control of strategic technical facilities, e.g. nuclear power plants.
Ivo Cap, Klara Capova
doaj   +2 more sources

Numerical Study and Optimal Design of the Butterfly Coil EMAT for Signal Amplitude Enhancement

open access: yesSensors, 2022
The low energy conversion efficiency of electromagnetic acoustic transducers (EMATs) is a critical issue in nondestructive testing applications. To overcome this shortcoming, a butterfly coil EMAT was developed and optimized by numerical simulation based
Jingjun Zhang   +3 more
doaj   +1 more source

Influence of Magnetostriction Induced by the Periodic Permanent Magnet Electromagnetic Acoustic Transducer (PPM EMAT) on Steel

open access: yesSensors, 2021
The periodic permanent magnet electromagnetic acoustic transducer (PPM EMAT) is a sensor that can generate and receive shear horizontal (SH) waves without direct contact with the inspected medium using the Lorentz mechanism.
Cong Zhu Sun   +2 more
doaj   +1 more source

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