Results 71 to 80 of about 2,905,814 (268)

Structural Health Monitoring system based on a concept of Lamb wave focusing by the piezoelectric array

open access: yesMechanical systems and signal processing, 2018
Piezoelectric transducer arrays are utilized in Structural Health Monitoring systems as a means for excitation and sensing of elastic waves. Anomalies of propagating waves have enabled to develop damage detection algorithms.
P. Kudela   +3 more
semanticscholar   +1 more source

Brexit and Its Impact on EU Financial Markets

open access: yesInternational Journal of Finance &Economics, EarlyView.
ABSTRACT We investigate the impact of Brexit on volatility spillovers across the EU countries. We introduce a Brexit intensity measure that assigns an intensity score reflective of the financial markets' reaction to the events that occurred as Brexit negotiations began to unfold.
Marwan Izzeldin   +3 more
wiley   +1 more source

Application of Instantaneous Parameter Characteristic in Active Lamb Wave Based Monitoring of Plate Structural Health

open access: yesApplied Sciences, 2020
In the active Lamb wave based monitoring of plate structural health, it is difficult to extract damage information from active Lamb waves based on single sensor collection.
Baochun Xu   +4 more
doaj   +1 more source

Construction of a mathematical model of lamb wave propagation in a steel pipeline with a protective outer coating

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2022
THE PURPOSE. Adapt the method of measuring the propagation of Lamb waves in thin two-layer plates to the study of the dependence of the phase velocity on the technical condition of pipelines with a protective outer coating.
S. O. Gaponenko   +2 more
doaj   +1 more source

Pulsed force sequences for fast phase-insensitive quantum gates in trapped ions

open access: yes, 2013
We show how to create quantum gates of arbitrary speed between trapped ions, using a laser walking wave, with complete insensitivity to drift of the optical phase, and requiring cooling only to the Lamb-Dicke regime.
Home, J P   +3 more
core   +1 more source

Calculating the full leaky Lamb wave spectrum with exact fluid interaction.

open access: yesJournal of the Acoustical Society of America, 2019
Lamb waves are elastodynamic guided waves in plates and are used for non-destructive evaluation, sensors, and material characterization. These applications rely on the knowledge of the dispersion characteristics, i.e., the frequency-dependent wavenumbers.
D. Kiefer   +3 more
semanticscholar   +1 more source

Chinese Parents' Psychological Control and Adolescents' Psychological Well‐Being Over Time: The Role of Psychological Needs

open access: yesJournal of Adolescence, EarlyView.
ABSTRACT Introduction This study examined the longitudinal association between Chinese adolescents' perceptions of three dimensions of both parents' psychological control (i.e., relational induction, social comparison shaming, and harsh control) and their psychological well‐being, indicated by life satisfaction and affective distress.
Xiaoqin Zhu   +3 more
wiley   +1 more source

Nonlinear Lamb Wave Micro-Crack Direction Identification in Plates with Mixed-Frequency Technique

open access: yesApplied Sciences, 2020
This paper investigates the direction identification of micro-cracks with nonlinear components generated by Lamb wave with frequency-mixing technique. Three-dimensional finite element simulations were carried out to investigate the interaction mechanism ...
Liqiang Guan   +3 more
doaj   +1 more source

Reconstructing post‐crisis recovery in the hinterlands of Constantinople: A high‐resolution first‐millennium CE pollen record from Lake Yeniçağa (NW Türkiye)

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Facing a novel plague pandemic, military invasions, and political–economic transformations, societies of the eastern Roman (Byzantine) empire had to adapt to a variety of pressures and new ways of exploiting their natural environments during the mid‐1st millennium CE.
Cristiano Vignola   +7 more
wiley   +1 more source

Non-destructive measurement of stress using ultrasonic leaky lamb waves [PDF]

open access: yes, 2009
This paper examines non-destructive measurement of stress using ultrasonic leaky lamb ...
Post, Mark, Zhu, Zheng Hong
core  

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