Results 81 to 90 of about 19,183 (214)

Broadband Low-Frequency Sound Absorption Enabled by a Rubber-Based Ni₅₀Ti₅₀ Alloy Multilayer Acoustic Coating

Journal of Marine Science and Engineering
Acoustic coatings play a vital role in enhancing the acoustic stealth of underwater structures across the full depth range and, especially, in the low-frequency band.
Yizhe Huang, Ziyi Liu, Qiyuan Fan, Huizhen Zhang, Bin Huang, Qibai Huang, Zhifu Zhang   +6 more
doaj   +1 more source

Green Developmentalism? The Political Economy of Hydropower in India in the 21st Century

Development and Change, EarlyView.
ABSTRACT This article critically examines the political economy of hydropower in India since its global reconfiguration as ‘green energy’ in the early 2000s. While an opportune convergence of interests among key global, national and subnational stakeholders contributed to the greening of hydropower in India, this reframing did not produce the expected ...
Vasudha Chhotray, Harsh Vasani
wiley   +1 more source

Finite Element Solution for Dynamic Mechanical Parameter Influence on Underwater Sound Absorption of Polyurethane-Based Composite. [PDF]

Int J Mol Sci, 2022
Yin D, Liu Y, Wang Y, Gao Y, Hu S, Liu L, Zhao X.   +6 more
europepmc   +1 more source

Numerical modeling of underwater parametric propagation to detect buried objects [PDF]

, 2011
In underwater acoustics, detection of buried objects in sediments (cables, mines,…) is a complex problem. One reason is that acoustic attenuation in these sediments increases with frequency. To ensure sufficient penetration depth in marine sediments, low
BOU MATAR, Olivier, BOUTTARD, Etienne, LABAT, Valérie   +2 more
core   +1 more source

Greater Resistance to Drought‐Induced Embolism Is Linked to Higher Yield Maintenance in Soybean

Plant, Cell &Environment, EarlyView.
ABSTRACT With increasing drought events worldwide, crop breeding must focus on drought resistance to maintain crop yields. To ensure a high level of gas exchange and growth, plants need to maintain the integrity of their vascular system under drought conditions. While the impact of drought‐induced vascular damage on tree species is well‐documented, its
Viviane Schell, Léa Kervroëdan, Déborah Corso, Daniela Yipenin N'do, Michel‐Pierre Faucon, Sylvain Delzon   +5 more
wiley   +1 more source

A three-dimensional bistatic reverberation model of underwater explosion by interface scattering at variable sound speeds

Journal of Low Frequency Noise, Vibration and Active Control, 2019
Underwater reverberation is a main limitation of the sonar performance and thereby the reverberation level estimation becomes crucial. In this study, based on the Lambert law and ray theory, a model for predicting 3D bistatic reverberation performance by
Guo Rui, Lei Liu, Sheng Zhen-Xin, Song Pu   +3 more
doaj   +1 more source

Measurements of the backscattering characteristics of suspensions having a broad particle size distribution [PDF]

, 2007
Acoustic backscatter systems (ABS) can be used to non-intrusively measure profiles of both the concentration and particle size of suspended sediments in the marine environment.
Moate, Benjamin D., Thorne, Peter D.
core  

Erosion of granular sediments by submerged impinging jets: Particle size effects and cohesion onset

AIChE Journal, Volume 72, Issue 6, June 2026.
Abstract This study investigates the erosion behavior and modeling of glass particle beds under impinging jet conditions, with a focus on particle size effects and the onset of cohesion. Ultrasonic profiling is implemented to scan and measure static crater profiles.
Ahmad Mohamadiyeh, Jeffrey Peakall, Michael Fairweather, Martyn Barnes, Timothy N. Hunter   +4 more
wiley   +1 more source

Design and Performance Analysis of Integrated Pressure-Resistant and Sound-Absorbing Coating with High-Transmittance Composite

水下无人系统学报
To address the significant degradation in sound absorption performance of conventional cavity-type sound-absorbing rubber coatings under high pressure environments, an integrated pressure-resistant and sound-absorbing coating with a high-transmittance ...
Jian TANG, Zhuohao JIN, Chen LU, Wenjiong CHEN   +3 more
doaj   +1 more source

Numerical simulation of a viscoelastic sound absorbent coating with a doubly periodic array of cavities

Cogent Engineering, 2018
Nowadays, research on underwater sound absorbing coatings is important on marine combats. Due to high cost of acoustic experimental tests, determination of an accurate simulation method for assessment of the coating characteristics is an important goal ...
Sayed Hamid Sohrabi, Mohammad Javad Ketabdari   +1 more
doaj   +1 more source