Results 51 to 60 of about 499,791 (395)

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

Prompt muon contribution to the flux underwater [PDF]

, 2001
We present high energy spectra and zenith-angle distributions of the atmospheric muons computed for the depths of the locations of the underwater neutrino telescopes.
A. B. Kaidalov, A. B. Kaidalov, A. D. Martin, A. D. Martin, A. N. Vall, B. C. Rastin, E. Andres, E. G. Anassontzis, E. V. Bugaev, E. V. Bugaev, E. V. Bugaev, E. V. Bugaev, G. Gelmini, G. Gelmini, G. Gelmini, G. T. Zatsepin, H. Inazawa, H. L. Lai, I. A. Belolaptikov, J. W. Elbert, L. Pasquali, L. V. Volkova, L. V. Volkova, L. V. Volkova, M. Aglietta, M. Aglietta, M. Ambrosio, M. Thunman, O. I. Piskunova, S. I. Nikol’sky, S. I. Sinegovsky, S. Matsuno, T. S. Sinegovskaya, V. A. Naumov, V. A. Naumov, V. A. Naumov, V. N. Bakatanov, W. Rhode   +37 more
core   +2 more sources

A Multi-Spatial Scale Ocean Sound Speed Prediction Method Based on Deep Learning

Journal of Marine Science and Engineering
As sound speed is a fundamental parameter of ocean acoustic characteristics, its prediction is a central focus of underwater acoustics research. Traditional numerical and statistical forecasting methods often exhibit suboptimal performance under complex ...
Yu Liu, Benjun Ma, Zhiliang Qin, Cheng Wang, Chao Guo, Siyu Yang, Jixiang Zhao, Yimeng Cai, Mingzhe Li   +8 more
doaj   +1 more source

Generalized Robust PCA: A New Distance Metric Method for Underwater Target Recognition

IEEE Access, 2019
Inspired by the importance of distance metrics and the structure-preserving ability of features, a novel recognition method for underwater targets, called generalized robust principal component analysis (GRPCA), is proposed in this paper.
Jian Xu, Pengfei Bi, Xue Du, Juan Li, Dong Chen   +4 more
doaj   +1 more source

Underwater Acoustic Ranging Between Smartphones [PDF]

arXiv, 2022
We present a novel underwater system that can perform acoustic ranging between commodity smartphones. To achieve this, we design a real-time underwater ranging protocol that computes the time-of-flight between smartphones. To address the severe underwater multipath, we present a dual-microphone optimization algorithm that can more reliably identify ...
arxiv  

Underwater Acoustic Micromodem for Underwater Internet of Things

Wireless Communications and Mobile Computing, 2022
Underwater acoustic communication (UAC) networks are becoming a hot spot for research due to the growing demand for ocean development. Previous acoustic modems were mainly designed for the field of ocean engineering construction and scientific investigation, and consequently, with the characteristics of large size and high-power consumption, a low-cost,
Hongbin Chen, Yi Zhu, Wenwen Zhang, Kefei Wu, Fei Yuan   +4 more
openaire   +1 more source

Underwater Autonomous Tank Cleaning Rover [PDF]

arXiv, 2023
In order to keep aquatic ecosystems safe and healthy, it is imperative that cleaning be done frequently. This research suggests the use of autonomous underwater rovers for effective underwater cleaning as a novel approach to this issue. The enhanced sensing and navigational capabilities of the autonomous rovers enable them to independently navigate ...
arxiv  

An Underwater SLAM System using Sonar, Visual, Inertial, and Depth Sensor

, 2019
This paper presents a novel tightly-coupled keyframe-based Simultaneous Localization and Mapping (SLAM) system with loop-closing and relocalization capabilities targeted for the underwater domain.
Li, Alberto Quattrini, Rahman, Sharmin, Rekleitis, Ioannis   +2 more
core   +1 more source

Underwater acoustic slant range measurements related to weather and sea state [PDF]

, 2018
Underwater range measurements are key factor in underwater acoustic positioning, used in Long Base-Line (LBL) or Ultra Short Base-Line (USBL) computing techniques. These measurements are commonly carried out through acoustic communications between modems
Aguzzi, Jacopo, Bouvet, Pierre-Jean, Carandell Widmer, Matias, Gomáriz Castro, Spartacus, Masmitjà Rusiñol, Ivan, Río Fernandez, Joaquín del   +5 more
core   +1 more source

Optimal design of power generation equipment for autonomous underwater vehicle

Advances in Mechanical Engineering, 2018
Autonomous underwater vehicle with the ability to generate electricity is an effective solution for detecting the ocean. In this article, a vertical-axis current generator for underwater vehicle is designed.
Fen Guo, Baowei Song, Zhaoyong Mao, Wenlong Tian   +3 more
doaj   +1 more source