Results 61 to 70 of about 4,296,969 (159)

Passive source depth estimation without prior sound speed profile in reliable acoustic path environments

In a deep-water reliable acoustic path environment, the sound field is dominated by the direct (D) and surface-reflected (SR) paths. Utilizing the time delay between these two paths (D-SR time delay), we can estimate the source depth, exploiting the ...
Chao Sun, Chengwu Gao, Mingyang Li
core   +1 more source

A Time Series Prediction Method for Ocean Sound Speed Profiles Based on Improved TCN Neural Network and Its Application in Seafloor Geodetic Positioning

Journal of Marine Science and Engineering
Ocean sound speed profile (SSP) is a key parameter for underwater acoustic detection, remote sensing, and seafloor geodetic positioning, and its temporal prediction is essential for improving acoustic positioning accuracy.
Yueyuan Ma, Shuang Zhao, Baojin Li, Linhao Li   +3 more
doaj   +1 more source

Potential Impacts of Climate Interventions on Marine Ecosystems

Reviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract Rising global temperatures pose significant risks to marine ecosystems, biodiversity, and fisheries. Recent comprehensive assessments suggest that large‐scale mitigation efforts to limit warming are falling short, and all feasible future climate projections, including those that represent optimistic emissions reductions, exceed the Paris ...
Kelsey E. Roberts, Tyler Rohr, Morgan R. Raven, Michael S. Diamond, Daniele Visioni, Ben Kravitz, Ryan Heneghan, Colleen M. Petrik, Daniele Bianchi, Kelly Ortega‐Cisneros, Monica A. Morrison, Vanessa van Heerden, Nicola A. Wiseman, Gouri Anil, Zachary J. Cannizzo, Marta Coll, Joshua Coupe, Ryan Freedman, Kristen Krumhardt, Lester Kwiatkowski, Nicole S. Lovenduski, Jessica Y. Luo, Holly C. Olivarez, Alan Robock, Jeroen Steenbeek, Cheryl S. Harrison   +25 more
wiley   +1 more source

Wave‐Partition‐Governed Dual‐Site Spallation in Single Crystals

Advanced Science, Volume 13, Issue 9, 13 February 2026.
Crystalline anisotropy shapes shock‐wave propagation and the resulting damage evolution in single crystals. Large‐scale molecular dynamics and damage modeling uncover a dual‐spallation mechanism driven by anisotropic elasticplastic wave separation, which mitigates damage accumulation.
Youlin Zhu, Sheng Qian, Lianfu Qiu, Jianian Hu, Guoqiang Luo, Qiang Shen, Qi Tong   +6 more
wiley   +1 more source

Isochronal-band-constrained multipath structure matching for active sonar localization in convergence zones

Frontiers in Marine Science
In convergence-zone (CZ) propagation, sound rays undergo continuous refraction due to the vertical sound speed gradient, forming complex multipath arrival structures.
Binquan Guo, Zhaohua Su, Anqi Jin, Sen Zhang, Binkai Liang, Zhiji Chen, Shibo Wang, Junjie Mao   +7 more
doaj   +1 more source

Optimization of Processing Parameters and Quality Evaluation of Breakfast Flakes Prepared From Sonicated Corn and Its By‐Products Supplemented With Quinoa Powder

Food Science &Nutrition, Volume 14, Issue 2, February 2026.
Optimization of processing parameters and quality evaluation of breakfast flakes prepared from sonicated corn, and its by‐products supplemented with quinoa powder. ABSTRACT Corn cob (C) and silk (S), produced in substantial quantities as agro‐waste, are rich in bioactive compounds with disease‐preventive potential.
Hina Niaz, Amna Javed, Rida Niaz
wiley   +1 more source

Carotid atherosclerotic plaque characterisation by measurement of ultrasound sound speed in vitro at high frequency, 20 MHz [PDF]

, 2010
PhDThe first part of the study was to characterise the acoustic properties of an IEC agar-based tissue mimicking material (TMM) at ultrasound frequencies centred around 20 MHz.
Brewin, Mark Paul
core   +2 more sources

Chemical Fingerprinting of Spiranthes spiralis L. Methanol Seed Extract: Spectroscopic, Chromatographic, and Computational Approaches

Food Science &Nutrition, Volume 14, Issue 2, February 2026.
Spiranthes spiralis L. seed methanol extract was morphologically and chemically characterized using microscopy, FT‐IR, GC–MS, and in silico analyses. The extract exhibited high phenolic content and strong DPPH radical scavenging activity, while GC–MS identified 22 bioactive compounds with notable binding affinity toward the GPR52 receptor.
Erdi Can Aytar, Taşkın Basılı, Altevir Rossato Viana, Bengisu Şentürk, Emine İncilay Torunoğlu, Major Mabuza, Mika Sillanpää, Yasemin Özdener Kömpe   +7 more
wiley   +1 more source

A model based system for simultaneously estimating bathymetry and sound speed profile characteristics - Non-isovelocity simulation results

, 2002
This paper presents further developments of an adaptive bathymetric estimation algorithm (ABE) for use with forward-looking bathymetric sonar in non-isovelocity underwater acoustic environments.
Cousins, D. B., Miller, J. H.
core   +1 more source

Inverting the sound speed profile from multi-beam echo sounder data and historical measurements - a simulation study [PDF]

The ocean’s lack of transparency offers plenty of opportunities for illegal trade enterprises, terrorism, and covert military operations. Unmanned surface vehicles and autonomous underwater vehicles are possible disruptive technologies that might counter
Gourret, Yohann, Brander, Tommi, Hjelmervik, Karl Thomas   +2 more
core   +1 more source