Results 61 to 70 of about 1,232 (173)

Strategy for Detection and High-Resolution Characterization of Authigenic Carbonate Cold Seep Habitats Using Ships and Autonomous Underwater Vehicles on Glacially Influenced Terrain

Frontiers in Marine Science, 2019
Cold seep habitats with authigenic carbonates and associated chemosynthetic communities in glacially influenced terrains constitute an important part of the benthic ecosystems, but they are difficult to detect in large-scale seabed surveys.
Terje Thorsnes, Terje Thorsnes, Shyam Chand, Shyam Chand, Harald Brunstad, Aivo Lepland, Aivo Lepland, Petter Lågstad   +7 more
doaj   +1 more source

Curvy Surface Reconstruction

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, Haoyu Qi, Zhigang Wang, Keyu Meng, Zeye Liu, Zeng Meng, Yu Yang, Jianjun Wang, Shan Jiang   +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, Douglas Gillespie, Carol Sparling, Emma Longden, Gordon Hastie   +4 more
wiley   +1 more source

Combining multibeam and single beam echosounders for quantifying gas bubble release from the seafloor

Limnology and Oceanography: Methods, Volume 24, Issue 2, February 2026.
Abstract Marine gas bubble release is a worldwide phenomenon that impacts the local marine ecosystem and contributes to carbon fluxes with respect to global warming. It is still challenging to assess gas flow for large seep areas (tens of km2), but recent advances in calibrating and processing multibeam echosounder (MBES) data make this problem ...
P. Urban, M. E. Veloso‐Alarcón, J. Greinert   +2 more
wiley   +1 more source

A Frequency–Azimuth Spectrum Estimation Method for Uniform Linear Array Based on Deconvolution

Remote Sensing
The frequency–azimuth (FRAZ) spectrum is a critical characteristic in passive target detection and tracking, as it encapsulates information regarding the signal’s frequency and azimuth.
Daiqiang Lu, Zhiming Cai, Wei Guo, Zhixiang Yao, Huanzhi Cao   +4 more
doaj   +1 more source

A distributed autonomous passive sonar system

Monitoring marine areas has become a fundamental activity for addressing key challenges such as biodiversity research and conservation, civilian operations on infrastructures and Marine Protected Areas (MPA), and military surveillance, with a particular focus on Anti-Submarine Warfare (ASW) and the protection of critical infrastructures. A current open
openaire   +1 more source

A wave glider for passive acoustic monitoring of cetaceans and anthropogenic sources in the central Mediterranean Sea. [PDF]

Sci Rep
Ferri S, Evrard A, Canese S, Romeo T, Greco S, Passarelli A, Favaro L, Caruso F.   +7 more
europepmc   +1 more source

Particle Filter-Guided Online Neural Networks for Multi-Target Bearing-Only Tracking in Passive Sonar Systems. [PDF]

Sensors (Basel)
Wang J, Wang L, Wang Z, Xie L, Hu H.
europepmc   +1 more source

Route Optimization for Active Sonar in Underwater Surveillance. [PDF]

Sensors (Basel)
Metin MG, Karatas M, Bulkan S.
europepmc   +1 more source

A robotic model of efficient prey finding in the gleaning bat Micronycteris microtis. [PDF]

J Exp Biol
Vanderelst D, Geipel I, Peremans H.
europepmc   +1 more source