Results 11 to 20 of about 2,314,785 (187)

Effects of the pipe-joints on acoustic emission wave propagation velocity [PDF]

open access: yes, 2008
In jointed-pipes, a variety of different acoustic emission (AE) waves can be generated by way of mode conversion, wave reflection and wave transmission from a joint. This can lead to interference waves as resulting complicated signals propagate along the
Wichaidit, W, Au, YHJ
core   +6 more sources

Integration of sol-gel frequency agile materials for tunable RF devices [PDF]

open access: yes, 2012
This thesis focuses on the use of high permittivity tunable dielectrics and more specifically sol-gel ferroelectric thin films for low cost, high performance tunable devices such as varactors and filters at RF and microwave frequencies.
Fragkiadakis, Charalampos
core   +7 more sources

Wave Climate, Geotechnical and Geophysical Analysis of the Tillamook Jetties [PDF]

open access: yes
Wave Energy AS (WE) is an ocean energy company from Norway established to develop, test, market and commercialize the patented SSG™ wave energy converter technology.
Wave Energy AS, Bakke, Monica
core   +6 more sources

Modified Green's Functions for Shallow Water Acoustic Wave Propagation [PDF]

open access: yes, 2004
This article presents an assessment of alternative forms of the Green’s function for boundary element simulations of acoustic wave propagation in shallow water. It is assumed that the problem is two-dimensional, the source of acoustic disturbance is time-
Santiago, J A F S, Wrobel, L C
core   +1 more source

Assembly and interconnection technology for high-temperature bulk acoustic wave resonators [PDF]

open access: yesJournal of Sensors and Sensor Systems, 2022
A sensor based on a piezoelectric single crystal enables operation even under harsh environmental conditions. In addition to the sensor element, the packaging technology is crucial for sensor performance.
F. Kohler   +4 more
doaj   +1 more source

Acoustic spin pumping in magnetoelectric bulk acoustic wave resonator

open access: yesAIP Advances, 2016
We present the generation and detection of spin currents by using magnetoelastic resonance excitation in a magnetoelectric composite high overtone bulk acoustic wave (BAW) resonator (HBAR) formed by a Al-ZnO-Al-GGG-YIG-Pt structure.
N. I. Polzikova   +5 more
doaj   +1 more source

A linear acoustic model for intake wave dynamics in IC engines [PDF]

open access: yes, 2004
In this paper, a linear acoustic model is described that has proven useful in obtaining a better understanding of the nature of acoustic wave dynamics in the intake system of an internal combustion (IC) engine.
Harrison, M. F., Stanev, P. T.
core   +1 more source

Combined surface acoustic wave and surface plasmon resonance measurement of collagen and fibrinogen layer physical properties

open access: yesSensing and Bio-Sensing Research, 2016
We use an instrument combining optical (surface plasmon resonance) and acoustic (Love mode surface acoustic wave device) real-time measurements on a same surface for the identification of water content in collagen and fibrinogen protein layers.
J.-M. Friedt, L.A. Francis
doaj   +1 more source

Hybrid integrated photonics using bulk acoustic resonators

open access: yesNature Communications, 2020
Here, the authors demonstrate acousto-optic modulation of silicon nitride microring resonators using high-overtone bulk acoustic wave resonances, allowing modulation in the GHz range via acoustic waves.
Hao Tian   +6 more
doaj   +1 more source

Residual strain measurement based on longitudinal to shear wave velocity ratio with a dual-mode EMAT

open access: yesFrontiers in Materials, 2023
In this paper, a new and noncontact method with measuring longitudinal to shear wave velocity ratio by a dual-mode electromagnetic acoustic transducer is proposed for residual strain measurement in a metal structure without knowing its thickness. Firstly,
Geng Dang   +4 more
doaj   +1 more source

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