Results 101 to 110 of about 20,086 (211)

Search for the Wreckage of Air France Flight AF 447

open access: yes, 2014
In the early morning hours of June 1, 2009, during a flight from Rio de Janeiro to Paris, Air France Flight AF 447 disappeared during stormy weather over a remote part of the Atlantic carrying 228 passengers and crew to their deaths.
Keller, Colleen M.   +3 more
core   +1 more source

Abundance of manatees in Panama estimated from side‐scan sonar

open access: yesWildlife Society Bulletin, 2017
The Antillean manatee (Trichechus manatus manatus) is found in tropical and subtropical riverine and coastal waters across the Caribbean region. Little is known of its population status, particularly in Central America.
Hector M. Guzman, Richard Condit
doaj   +1 more source

Style Transfer-Based Augmentation for Side-Scan Sonar Images

open access: yes水下无人系统学报
Side-scan sonar(SSS) has been extensively adopted in ocean exploration because of its stability and efficiency when deployed on autonomous undersea vehicles(AUVs).
Zhongyu BAI   +3 more
doaj   +1 more source

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

open access: yesInternational 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   +2 more
doaj   +1 more source

Rethinking the Patch Test for Phase Measuring Bathymetric Sonars [PDF]

open access: yes, 2011
While conducting hydrographic survey operations in the Florida Keys, NOAA Ship Thomas Jefferson served as a test platform for the initial operational implementation of an L-3 Klein HydroChart 5000 Swath Bathymetry Sonar System1 , a hull-mounted phase ...
Beaudoin, Jonathan   +3 more
core   +1 more source

Looking at the Unborn: Historical aspects of obstetric ultrasound [PDF]

open access: yes, 2000
Edited trascript of a Witness Seminar held at the Wellcome Institute for the History of Medicine,in London, on 10 March 1998. First published by the Wellcome Trust, 2000. ©The Trustee of the Wellcome Trust, London, 2000.
Christie, DA, Tansey, EM
core  

Deep Learning-Based Feature Matching Algorithm for Multi-Beam and Side-Scan Images

open access: yesRemote Sensing
Side-scan sonar and multi-beam echo sounder (MBES) are the most widely used underwater surveying tools in marine mapping today. The MBES offers high accuracy in depth measurement but is limited by low imaging resolution due to beam density constraints ...
Yu Fu   +5 more
doaj   +1 more source

MAL-YOLO: a lightweight algorithm for target detection in side-scan sonar images based on multi-scale feature fusion and attention mechanism

open access: yesInternational Journal of Digital Earth
Side-scan sonar image target detection is of great significance in seabed resource exploration and other fields. However, affected by the complex underwater environment, side-scan sonar images have the problems of few target samples and large differences
Yu Cao   +5 more
doaj   +1 more source

Side scan sonar image formation, restoration and modelling

open access: yes, 1996
The research described in this thesis was carried out in collaboration with Geoteam - Wimpol UK Ltd., between the October 1992 and October 1995 at the Robert Gordon University in Aberdeen. The work deals principally with the development of processing algorithms for sonar image enhancement. The thesis is divided into two principal parts.
openaire   +2 more sources

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