Results 51 to 60 of about 1,483 (184)
Доклады Белорусского государственного университета информатики и радиоэлектроники, 2019 The method of measuring bearing (azimuth) of a moving surface (underwater) object in the passive sonar is described. This method is considered to be a modification of signals phase comparing method.
S. R. Heister, D. N. Nguyen
doaj
Basin Research, Volume 38, Issue 2, March/April 2026.Basin‐scale dataset reveals widespread hydrocarbon venting at the seafloor in the northern Gulf of Mexico. Hydrocarbon release at the seafloor is related to the occurrence of the underlying Louann salt and the gas hydrate stability zone. ABSTRACT The release of hydrocarbons, pore water and fluidized sediments impacts seafloor morphology, marine ...
Muhedeen A. Lawal +3 more
wiley +1 more source
Detection-Performance Prediction for Passive Sonar Systems [PDF]
The Journal of the Acoustical Society of America, 1968 Horton has derived the “direct-listening equation” as one of a set applicable to specific classes of sonar systems. From this equation, he determines the maximum allowable one-way propagation loss for a passive sonar system to detect a noise source that radiates a known energy spectral density. This paper reviews and extends Horton's results to provide
Arent H. Kits van Heyningen +1 more
openaire +1 more source
Chasing Fish: 130 Years of Innovation, Displacement and Depletion in Scottish Fisheries
Fish and Fisheries, Volume 27, Issue 2, Page 227-247, March 2026.ABSTRACT Rebuilding the depleted fisheries of the 21st century requires an understanding of past drivers of their decline. Despite Scotland's central role in the commercial exploitation of North Sea fisheries for over a century, associations between technological innovations, regulatory introductions and fishery landings have not previously been ...
Zoe F. J. Heard +2 more
wiley +1 more source
Journal of Marine Science and Engineering, 2019 Capon beamforming is often applied in passive sonar to improve the detectability of weak underwater targets. However, we often have no accurate prior information of the direction-of-arrival (DOA) of the target in the practical applications of passive ...
Yu Hao, Nan Zou, Guolong Liang
doaj +1 more source
A Conceptual Framework and Methods for Studying the Connectivity of Fishes
Fish and Fisheries, Volume 27, Issue 2, Page 342-369, March 2026.ABSTRACT Connectivity is a multifaceted concept that has important implications for the management and conservation of marine and freshwater fishes. We developed a conceptual framework that encompasses multiple, interrelated categories of connectedness, including landscape (e.g., structural, functional) connectivity and ecological (e.g., trophic ...
Jordanna N. Bergman +18 more
wiley +1 more source
Characteristic Geometry of Keels in Arctic Sea Ice Ridges
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Deformation within and between sea ice floes creates pressure ridges, which compose a considerable volume fraction of the Arctic sea ice cover and complicate sea ice volume measurements. An important parameter for quantifying the ice volume contained in these deformation features is the keel shape.
Claire Eilers, Alice Bradley
wiley +1 more source
Underwater Acoustic Research Trends with Machine Learning: Passive SONAR Applications
한국해양공학회지, 2020 Underwater acoustics, which is the domain that addresses phenomena related to the generation, propagation, and reception of sound waves in water, has been applied mainly in the research on the use of sound navigation and ranging (SONAR) systems for ...
Haesang Yang +3 more
doaj +1 more source
Advanced Science, Volume 13, Issue 7, 3 February 2026.This review introduces the concept of “general curvy surface reconstruction,” which incorporates both geometric and physical dimensions, representing an upgrade over conventional geometric reconstruction that focuses solely on spatial relationships. Particular emphasis is placed on the emerging opportunities enabled by advanced measurement techniques ...
Chen Shang +8 more
wiley +1 more source
Evaluating the Risk of Collision of Seals Swimming Within Metres of Operating Tidal Turbines
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.ABSTRACT We used imaging sonar to continuously monitor wildlife at an operational tidal turbine in the Pentland Firth, Scotland, between May 2022 and June 2023. Of 704 detected seal tracks, 347 occurred during turbine operation and 122 of these were detected directly upstream of the rotating blades in the horizontal plane.
Jessica Montabaranom +4 more
wiley +1 more source