Results 1 to 10 of about 10,835 (263)

Sonarlogger: Enabling long-term underwater sonar observations

open access: yesHardwareX
Coastal seas are under increasing pressure from extreme weather events and sea level rise, resulting in impacts such as changing hydrodynamic conditions, coastal erosion, and marine heat waves. To monitor changes in coastal marine habitats, such as reefs
Frederik-Willem Fourie   +7 more
doaj   +3 more sources

IMPROVING UNDERWATER ACCURACY BY EMPIRICAL WEIGHTING OF IMAGE OBSERVATIONS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
An underwater imaging system with camera and lens behind a flat port does not behave as a standard pinhole camera with additional parameters.
F. Menna   +8 more
doaj   +7 more sources

A maneuverable underwater vehicle for near-seabed observation

open access: yesNature Communications
Underwater robots can collect comprehensive information on species and habitats when conducting seabed operations, enhancing localized insights and expanding underwater ecological understanding.
Kaixin Liu   +7 more
doaj   +3 more sources

Nursing behavior in sperm whales (Physeter macrocephalus) [PDF]

open access: yesAnimal Behavior and Cognition, 2023
In mammals, lactation is the universal behavior of feeding offspring and has a fundamental nutritional and social value with offspring staying near their mothers.
François Sarano   +12 more
doaj   +1 more source

Egg development and hatching in two Red Sea damselfishes

open access: yesFrontiers in Marine Science, 2023
Damselfishes (family Pomacentridae) are widely distributed reef-associated marine fishes. The family’s diversity, iconic nesting behaviors, and high environmental adaptability contribute to the popularity of damselfishes as aquarium species, tourist ...
Song He, Michael L. Berumen
doaj   +1 more source

THE MANAGEMENT OF BANGSRING UNDERWATER AS CONSERVATION - BASED ECOTOURISM FOR INTERNATIONAL TOURISM DESTINATION [PDF]

open access: yesGeo Journal of Tourism and Geosites, 2022
Bangsring Underwater site has high potential of ecotourism attraction for international tourists. The purpose of this study was to determine 1) the potential of Bangsring Underwater ecotourism based on attractions, accessibility, amenities, and 2 ...
Sumarmi SUMARMI   +4 more
doaj   +1 more source

Underwater robot sensing technology: A survey

open access: yesFundamental Research, 2021
Underwater robot technologies are crucial for marine resource exploration and autonomous manipulation, and many breakthroughs have been achieved with key indicators (e.g., dive depth and navigation range).
Yang Cong   +3 more
doaj   +1 more source

Rapid reconstruction of temperature and salinity fields based on machine learning and the assimilation application

open access: yesFrontiers in Marine Science, 2022
Satellite observations play important roles in ocean operational forecasting systems, however, the direct assimilation of satellite observations cannot provide sufficient constraints on the model underwater structure.
Zhihui Chen   +3 more
doaj   +1 more source

Underwater Hyperspectral Imaging (UHI): A Review of Systems and Applications for Proximal Seafloor Ecosystem Studies

open access: yesRemote Sensing, 2021
Marine ecosystem monitoring requires observations of its attributes at different spatial and temporal scales that traditional sampling methods (e.g., RGB imaging, sediment cores) struggle to efficiently provide.
Juan C. Montes-Herrera   +5 more
doaj   +1 more source

ASSESSMENT OF CHROMATIC ABERRATIONS FOR GOPRO 3 CAMERAS IN UNDERWATER ENVIRONMENTS [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
With underwater photogrammetric mapping becoming more prominent due to the lower costs for waterproof cameras as well as lower costs for underwater platforms, the aim of this research is to investigate chromatic aberration in underwater environments ...
P. Helmholz, D. D. Lichti
doaj   +1 more source

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