Results 51 to 60 of about 1,335,366 (185)

Satellite radiance observation error inflation and spatial thinning: Reconciling idealized theory with near‐operational applications

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Satellite radiance observations are spatially thinned using a grid‐based selection that retains one representative profile per cell. When observation errors are spatially correlated but treated as uncorrelated in the assimilation system, reducing thinning increases their influence, leading to overfitting and reduced analysis fit with other observations.
Joel Bedard, Alain Beaulne, Mark Buehner, Laurence Coursol   +3 more
wiley   +1 more source

Measurement of radiated ship noise

, 2013
A methodology is presented for measuring the radiated noise from a ship in shallow water, and deriving the source level spectrum. The method is applied to the measurement of dredgers in UK waters, vessels which are restricted to shallow water during ...
Humphrey, Victor F., Theobald, Pete, Robinson, Stephen P., Wang, Lian S., Lepper, Paul A., Hayman, Gary, Pete Theobald, Victor F. Humphrey, Paul A. Lepper, Gary Hayman, Lian S. Wang, Stephen P. Robinson   +11 more
core   +1 more source

Compression of a Deep Competitive Network Based on Mutual Information for Underwater Acoustic Targets Recognition

Entropy, 2018
The accuracy of underwater acoustic targets recognition via limited ship radiated noise can be improved by a deep neural network trained with a large number of unlabeled samples.
Sheng Shen, Honghui Yang, Meiping Sheng
doaj   +1 more source

Analysis of the Underwater Radiated Noise Generated by Hull Vibrations of the Ships

Sensors, 2023
Shipping traffic is recognised as the main man-noise source of the anthropogenic noise generated in the marine environment. The underwater acoustic pollution is increased due to the increment of the human activity at seas supposing a threat for marine ...
Rodrigo F. Javier, Ramis Jaime, Poveda Pedro, Carbajo Jesus, Segovia Enrique   +4 more
doaj   +1 more source

Sustainable Development Goals Applied to the Maritime Transportation Sector: Setting Sail for the Future

Natural Resources Forum, EarlyView.
ABSTRACT The 2030 Agenda for Sustainable Development aims to eradicate poverty, protect the environment, and promote prosperity through 17 Sustainable Development Goals (SDGs). Achieving these goals requires a multi‐sectoral approach. Maritime transportation, vital to the global economy, significantly contributes to several SDGs and plays a strategic ...
Cátia Sousa, Ana Brasão, Tiago Silva, Stanislau Tserashkovich   +3 more
wiley   +1 more source

A scheme to analyze the influence of ocean sound propagation on passive sonar target classification and recognition

AIP Advances
The time-varying, space-varying, and frequency-varying characteristics of the marine environment severely affect the classification and recognition of underwater passive sonar targets.
Chunyu Kang, Liufang Fu, Zhijun Xia, Linzhou Xu, Yi Zhang   +4 more
doaj   +1 more source

Sailing Through Time: Building Pacific Maritime Resilience

Global Policy, EarlyView.
ABSTRACT This article examines the Pacific Blue Shipping Partnership (PBSP), an ambitious initiative aimed at decarbonising maritime transport across Oceania. The study explores the cultural, historical and technological aspects of wind‐propelled shipping in the Pacific.
Christiaan De Beukelaer, John Taukäve, Maria Sahib, Eldine Glees, Aseri Driu, Joshua Lakabung, Atina Schutz, Joseph H. Genz, Shania G. Tamagyongfal, Jerolynn K. Myazoe, Alexander Mawyer, Alson Kelen, Larry Raigetal, Raffael Held, Andrew Irvin, Morgan Wairiu, Peter Nuttall, Transform Aqorau, Kyrie Lalauvaki, Aileen Sefeti, John Kautoke   +20 more
wiley   +1 more source

A directional spectrum evolution model for ship noise

, 2023
A radiation transport equation that describes the spatiotemporal evolution of the directional spectrum of underwater acoustic noise is presented and applied to ship noise.
Michael G. Brown, Brown, Michael G.
core   +1 more source

The Classroom as a Work of Art

International Journal of Art &Design Education, EarlyView.
Abstract This article is the product of a project that stems from an educational environment, challenges it, and aims to transcend its boundaries. Within the project, the ordinary flow of a classroom was intervened with through play, and ways to reunite students – who are often perceived as ‘surpluses’ within the current education system – were ...
Veli Aras Yalçınkaya
wiley   +1 more source

Impact of light pollution on fishes: Mechanisms and ecological consequences

Journal of Fish Biology, EarlyView.
Abstract The increasing prevalence of artificial light at night (ALAN) is of growing ecological concern. By altering natural light regimes, ALAN affects the behaviour, physiology and life‐history of organisms. While research has largely focused on terrestrial ecosystems, aquatic ecosystems are increasingly exposed.
Hanxi Chen, Ulrika Candolin
wiley   +1 more source