Results 41 to 50 of about 166,209 (277)

An efficient scalable scheduling mac protocol for underwater sensor networks [PDF]

, 2018
Underwater Sensor Networks (UWSNs) utilise acoustic waves with comparatively lower loss and longer range than those of electromagnetic waves. However, energy remains a challenging issue in addition to long latency, high bit error rate, and limited ...
Alfouzan, Faisal, Boutaleb, Tuleen, Ghoreyshi, Seyed Mohammad, Shahrabi, Alireza   +3 more
core   +1 more source

Deep learning-based marine big data fusion for ocean environment monitoring: Towards shape optimization and salient objects detection

Frontiers in Marine Science, 2023
ObjectiveDuring the last few years, underwater object detection and marine resource utilization have gained significant attention from researchers and become active research hotspots in underwater image processing and analysis domains.
Sulaiman Khan, Inam Ullah, Farhad Ali, Muhammad Shafiq, Muhammad Shafiq, Yazeed Yasin Ghadi, Taejoon Kim   +6 more
doaj   +1 more source

Hearing in the Juvenile Green Sea Turtle (Chelonia mydas): A Comparison of Underwater and Aerial Hearing Using Auditory Evoked Potentials

, 2016
Sea turtles spend much of their life in aquatic environments, but critical portions of their life cycle, such as nesting and hatching, occur in terrestrial environments, suggesting that it may be important for them to detect sounds in both air and water.
Eckert, Scott A., Harms, Craig A., Jones, T. Todd, Mann, David A., Piniak, Wendy Dow   +4 more
core   +3 more sources

A novel cooperative opportunistic routing scheme for underwater sensor networks [PDF]

, 2016
Increasing attention has recently been devoted to underwater sensor networks (UWSNs) because of their capabilities in the ocean monitoring and resource discovery.
Abello, Alireza Shahrabi, Seyed Ghoreyshi, Tuleen Boutaleb, Xie, Xie, Yan, Zhang, Zhou   +8 more
core   +1 more source

Design and Control of Unmanned Underwater Vehicle

Sukkur IBA Journal of Emerging Technologies, 2019
Unmanned Underwater Vehicles (UUV) are the robots that are used to monitor underwater environment at remote distance, either for inspection of underwater wreckage or for surveillance of underwater environment.
Kamran Ahmed Shahani, Rehan Akbar Arain, Nooruddin Khaskheli, Faizan ur Rehman   +3 more
doaj   +1 more source

Biodeterioration of marble in an underwater environment

Science of The Total Environment, 2017
This study examines the deterioration of geomaterials used throughout history that today may be found lying on the ocean floor. Submerged archaeological sites including cargoes from shipwrecks or ancient city ruins have been a topic of interest from a perspective of in situ musealization, as a way of making underwater cultural heritage accessible to ...
Cámara, Beatriz, de Buergo, Mónica Álvarez, Bethencourt, Manuel, Fernández-Montblanc, Tomás, La Russa, Mauro F., Ricca, Michela, Fort, Rafael   +6 more
openaire   +4 more sources

Vertical Distribution Characteristics of Sound Field Spectrum Splitting for Moving Sound Source in SOFAR Channel

Journal of Marine Science and Engineering
The frequency shift of multipath sound rays induced by the motion of a sound source in an ocean waveguide environment is a crucial factor affecting the detection capabilities of both active and passive sonar systems, as well as the quality of underwater ...
Zuoxiang Zhang, Jinrong Wu, Zhifei Fang, Yunfei Li   +3 more
doaj   +1 more source

Underwater object detection algorithm based on channel attention and feature fusion

Xibei Gongye Daxue Xuebao, 2022
Due to the color deviation, low contrast and fuzzy object in underwater optical images, there are some problems in underwater object detection, such as missed detection and false detection.
ZHANG Yan, LI Xingshan, SUN Yemei, LIU Shudong   +3 more
doaj   +1 more source

Application research on vector coherent frequency‐domain batch adaptive line enhancement in deep water

IET Radar, Sonar & Navigation
The low frequency line spectrum noise radiated by ships has strong stability and is difficult to eliminate, which is the key information required for passive signal detection.
He Li, Tong Wang, Xinyi Guo, Lin Su, Yaxiao Mo   +4 more
doaj   +1 more source

Underwater Target Detection Algorithm Based on Improved YOLOv5

Journal of Marine Science and Engineering, 2022
Underwater target detection plays an important role in ocean exploration, to which the improvement of relevant technology is of much practical significance.
Fei Lei, Feifei Tang, Shuhan Li
doaj   +1 more source