Results 81 to 90 of about 2,279,354 (175)

A method for estimating sound speed and the void fraction of bubbles from sub-bottom sonar images of gassy seabeds

, 2007
There is increasing interest in the effect of bubbles in gassy sediment. This is, first, because ofthe impact those bubbles have on the structural integrity and load-bearing capabilities of thesediment; second, because the presence of bubbles can be ...
Leighton, T.G.
core   +1 more source

Studies into the detection of buried objects (particularly optical fibres) in saturated sediment. Part 4: experimental investigations into the acoustic detection of objects buried in saturated sediment

, 2007
This report is the fourth in a series of five, designed to investigate the detection oftargets buried in saturated sediment, primarily through acoustical or acoustics-relatedmethods.
Evans, R.C.P.
core   +1 more source

A Hybrid VGG-ResNet Feature Fusion Network for Object Detection in Side-Scan Sonar Images

International Journal of Emerging Research in Engineering, Science, and Management
Side-scan sonar images present significant challenges for object detection due to high noise levels, limited spatial resolution, and complex seabed structures.
Venkata Lakshmi Keerthi K, Vijayalakshmi P, Rajendran V   +2 more
doaj   +1 more source

Use of acoustic seabed classification to identify fish habitats,

, 2002
There is a pressing need to identify the characteristics of habitats that have an important or 'essential' functional role for particular species or type e.g. piscivores/herbivores/omnivores or flatfish/roundfish. Identifying such habitat characteristics
Kaiser, M. J., Hinz, H., Bergmann, Melanie, Freeman, S.   +3 more
core   +1 more source

Exploring the multispectral acoustic response of reef habitats

Frontiers in Remote Sensing
In recent decades, the value and utility of multibeam bathymetry and backscatter data has been increasingly recognized within the field of seascape ecology (the ocean-centric equivalent of landscape ecology) to map the bio- and geodiversity of the ocean ...
Pedro S. Menandro, Fernanda V. Vieira, Alex C. Bastos, Craig J. Brown   +3 more
doaj   +1 more source

Use of Sentinel-2 optical imagery for the reconstruction of coastal bathymetry: a case study in Mozambique

European Journal of Remote Sensing
Bathymetric surveys are essential for ensuring safe navigation and supporting environmental studies in coastal regions. Collecting bathymetry data in the field using acoustic sonars allows us to accurately reproduce underwater topography but is limited ...
Francesco Varni, Bianca Federici, Alfonso Quarati, Michele Bolla Pittaluga, Monica De Martino   +4 more
doaj   +1 more source

Waveform Analysis for Enhancing Airborne LiDAR Bathymetry in Turbid and Shallow Tidal Flats of the Korean West Coast

Remote Sensing
Tidal flats play a vital role in coastal ecosystems by supporting biodiversity, mitigating natural hazards, and functioning as blue carbon reservoirs. However, monitoring their geomorphological changes remains challenging due to high turbidity, shallow ...
Hyejin Kim, Jaebin Lee
doaj   +1 more source

Multifrequency seafloor acoustic backscatter as a tool for improved biological and geological assessments – updating knowledge, prospects, and challenges

Frontiers in Remote Sensing
Multibeam echosounders (MBES) have emerged as a primary tool for seafloor mapping over the past three decades. Technological advancements and improved data processing methods have increased the accuracy and spatial resolution of bathymetric measurements,
Pedro S. Menandro, Benjamin Misiuk, Benjamin Misiuk, Jens Schneider von Deimling, Alex C. Bastos, Craig J. Brown   +5 more
doaj   +1 more source

Intermountain Acoustic Musician, Volume 17 Number 2, February 2000

, 2000
Salt Lake City, UT: International Bluegrass Association; The Intermountain Acoustic Music Association is a member of the International Bluegrass Music Association and Folk Alliance, the North American folk music and dance alliance. Intermountain Acoustic
Intermountain Acoustic Music Association
core  

Intermountain Acoustic Musician, Volume 23 Number 8, August 2006

, 2006
Salt Lake City, UT: International Bluegrass Association; The Intermountain Acoustic Music Association is a member of the International Bluegrass Music Association and Folk Alliance, the North American folk music and dance alliance. Intermountain Acoustic
Intermountain Acoustic Music Association
core