Results 131 to 140 of about 5,103,302 (259)

Digital Twins for Offshore Wind Operation and Maintenance: A Review

Wind Energy, Volume 29, Issue 10, October 2026.
ABSTRACT Offshore wind has become a key focus for achieving carbon neutrality. However, offshore wind turbines face considerable operational and maintenance challenges due to harsh conditions and difficult access. Integrating digital twin technology helps support operation and maintenance activities.
Xiaomei Hu, Ravi Pandit, Yifan Zhao, Bernadin Namoano, Jiarong Hong   +4 more
wiley   +1 more source

Beam-Enabled Acoustic Link Establishment (BEALE) for underwater acoustic networks [PDF]

, 2013
textThere is growing interest in developing reliable, high performance, underwater acoustic networks (UWANs). However, the acoustic communication channel, with its slow sound propagation, high signal attenuation, and low bandwidth, presents significant ...
Watkins, Karen Piecara
core  

Low-power low-cost acoustic underwater modem

, 2016
Recent advances in electronics and robotics enable automated and potentially unsupervised environmental underwater inshore monitoring with swarms of small, low-power, autonomous underwater vehicles (AUV). To enable flexible and self-organizing operation,
Meyer, Benjamin, Maehle, Erik, Gabrecht, Alexander, Renner, Bernd-Christian, Osterloh, Christoph   +4 more
core   +1 more source

Structural Variation in Whistle Patterns of Two Coastal Dolphin Species Co‐Occurring in the Southern Israeli Mediterranean Sea

Marine Mammal Science, Volume 42, Issue 4, October 2026.
ABSTRACT Two coastal dolphin species, the common bottlenose dolphin (Tursiops truncatus—Tt) and the short‐beaked common dolphin (Delphinus delphis—Dd), co‐occur along the southern Israeli Mediterranean coast, where the critically endangered Dd population faces ecological pressures, potentially including competitive exclusion by that of the Tt ...
Y. E. Zuriel, I. Aharoni, D. Atch, O. Galili, D. Tchernov, A. Scheinin, D. Kerem   +6 more
wiley   +1 more source

Vocalization Characteristics of the Indo‐Pacific Humpback Dolphins (Sousa chinensis) in Xiamen Bay With Insights on Regional Differences

Ecology and Evolution
Although whistles and high‐frequency clicks of Indo‐Pacific humpback dolphins (Sousa chinensis) had been documented in many wild populations, the small population inhabiting Xiamen Bay has received limited attention.
Xuming Peng, Zhiyuan Hua, Fuxing Wu, Fei Zhang, Weijie Fu, Yupeng Li, Chuang Zhang, Wenzhan Ou, Wenjie Xiang, Bing Zhou, Zhongchang Song, Yu Zhang   +11 more
doaj   +1 more source

Group‐Specific Variation in Heterodyne Frequencies of Biphonic Calls in Resident (R‐Type) Killer Whales Orcinus orca ater

Marine Mammal Science, Volume 42, Issue 4, October 2026.
ABSTRACT Biphonation—the simultaneous production of two independent fundamental frequencies within a single vocalization—is a prominent feature of killer whale calls, yet the factors influencing the presence and intensity of heterodyne frequencies, which arise from interactions between these fundamentals, remain poorly understood. We analyzed long‐term
Vera I. Fedorova, Ilya A. Volodin, Tatiana V. Ivkovich, Elena V. Volodina, Erich Hoyt, Olga A. Filatova   +5 more
wiley   +1 more source

Soft Metalens for Broadband Ultrasonic Focusing through Aberration Layers

Nature Communications
Aberration layers (AL) often present significant energy transmission barriers in microwave engineering, electromagnetic waves, and medical ultrasound. However, achieving broadband ultrasonic focusing through aberration layers like the human skull using ...
Erqian Dong, Tianye Zhang, Jinhu Zhang, Xiaochun Su, Sichao Qu, Xin Ye, Zhanyuan Gao, Chengtian Gao, Jiangang Hui, Zhanxiang Wang, Nicholas X. Fang, Yu Zhang   +11 more
doaj   +1 more source

Correction: Shaikh et al. Acoustic Propagation and Transmission Loss Analysis in Shallow Water of Northern Arabian Sea. J. Mar. Sci. Eng. 2024, 12, 2256

Journal of Marine Science and Engineering
Errors in Figures [...]
Shahabuddin Shaikh, Yiwang Huang, Ayman Alharbi, Muhammad Bilal, Abdul Sami Shaikh, Habib Hussain Zuberi, Muhammad Ayoob Dars   +6 more
doaj   +1 more source

Description, Detection, and Classification of Hawaiian Monk Seal Vocalizations Through Deep‐Learning Methods: Biological and Conservation Applications

Marine Mammal Science, Volume 42, Issue 4, October 2026.
ABSTRACT The Hawaiian monk seal is a phocid Carnivore endemic to the Hawaiian Archipelago. This species was thought to be silent under water until the recent discovery that mature males produce at least six distinct calls year round, typically in bouts of two or more, with sound production linked to reproductive status.
Jeppe Have Rasmussen, Jillian M. Sills, Kirby Parnell, Colleen Reichmuth   +3 more
wiley   +1 more source

A Study on the Wide-Sense Stationarity of the Underwater Acoustic Channel for Coherent Communication Systems

, 2011
In this paper, we test the wide sense stationarity of the estimation error achieved by an exponentially weighted least squares algorithm, used to estimate the channel impulse response.
James Preisig, Beatrice Tomasi, ZORZI, MICHELE   +2 more
core