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Jérôme OLLIER

Spatial Distribution and Encounter Rates of Delphinids and Deep Diving Cetaceans in the... - 0 views

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    Marine traffic has been identified as a serious threat to Mediterranean cetaceans with few mitigation strategies in place. With only limited research effort within the Eastern Basin, neither baseline species knowledge nor the magnitude of threats have been comprehensively assessed. Delineating the extent of overlap between marine traffic and cetaceans provides decision makers with important information to facilitate management. The current study employed the first seasonal boat surveys within the Eastern Mediterranean Sea of Turkey, incorporating visual and acoustic survey techniques between 2018 and 2020 to understand the spatial distribution of cetacean species. Additionally, marine traffic density data were retrieved to assess the overlap with marine traffic. Encounter rates of cetaceans and marine traffic density were recorded for each 100 km2 cell within a grid. Subsequently, encounter and marine traffic density data were used to create a potential risk index to establish where the potential for marine traffic and cetacean overlap was high. Overall, eight surveys were undertaken with a survey coverage of 21,899 km2 between the Rhodes and Antalya Basins. Deep diving cetaceans (sperm and beaked whales) were detected on 28 occasions, with 166 encounters of delphinids of which bottlenose, striped and common dolphins were visually confirmed. Spatially, delphinids were distributed throughout the survey area but encounter rates for both deep diving cetaceans and delphinids were highest between the Rhodes and Finike Basins. While sperm whales were generally detected around the 1000m contour, delphinids were encountered at varying depths. Overall, two years of monthly marine traffic density were retrieved with an average density of 0.37 hours of monthly vessel activity per square kilometer during the study period. The mean density of vessels was 0.32 and 1.03 hours of monthly vessel activity per square kilometer in non-coastal and coastal waters respectively. The Easter
Jérôme OLLIER

Impact chains for the deep seafloor: assessing pressures footprint under limited knowle... - 0 views

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    Pressures on the marine environment threaten biodiversity, ecosystem functions and services. Current marine environmental policies, such as the European Marine Strategy Framework Directive, require the assessment of combined effects and the application of ecosystem-based management approaches to maintain or achieve Good Environmental Status (GES) of marine ecosystems. We mapped the major activities and pressures affecting deep-sea benthic habitats in the mainland component of the Portuguese EEZ to assess their combined effects and support decision-making on management and conservation. Activities related to marine traffic, fisheries, and climate change processes are among the most prevalent in the study area. As a data-poor case study, most of the pressure layers were only partially mapped due to a lack of information or the inadequacy of the available data on activities to derive suitable proxies of pressure intensity. Pressures related to chemical changes, chemicals and other pollutants were the most widespread, while abrasion and damage were the most geographically limited. Endogenic pressures dominate in bathyal benthic habitats and decrease their prevalence with depth, while exogenic pressures are more widespread in the abyss than in the bathyal area. Benthic habitats in the bathyal zone, closer to the 200-meter bathymetric contour, consistently exhibited higher combined effect scores, suggesting higher risk of potential impacts on these ecosystem components. Research directed towards these areas is required to assess the state of these habitats and develop conservation and restoration measures, if necessary, to achieve GES. A continuous support for open-access databases containing high-quality, standardized, and harmonized marine data is crucial for future assessments of the combined effects of human pressures on deep-sea ecosystems.
xiaobaicai

frying machine,Vacuum Frying Machine,Deep Frying Machine - 0 views

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    We specialize in the manufacture and sale frying machine,Vacuum Frying Machine,Deep Frying Machine,Continuous Fryer Machine,Good quality and low price If you need please contact us
Jérôme OLLIER

Deep ocean vehicle to seek ship wreckage off Bahamas - @AP via @physorg_com - 0 views

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    Deep ocean vehicle to seek ship wreckage off Bahamas.
Jérôme OLLIER

Owner's 'deep remorse' over ship stuck on Pacific reef - @AFP via @YahooNews - 0 views

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    Owner's 'deep remorse' over ship stuck on Pacific reef.
Jérôme OLLIER

Drones in the deep: new applications for maritime UAVs - @ShipTechMag - 0 views

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    Drones in the deep: new applications for maritime UAVs.
Jérôme OLLIER

Seven Yield Delivers the First Deep-Sea LNG-Powered Car Carrier - @Mar_Ex - 0 views

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    Seven Yield Delivers the First Deep-Sea LNG-Powered Car Carrier.
Jérôme OLLIER

#Covid19 #coronavirus - 2M Alliance Announces Deep Cuts to Asia-Europe Services - @Mar_Ex - 0 views

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    2M Alliance Announces Deep Cuts to Asia-Europe Services.
Jérôme OLLIER

Via Polar Obs - U.S. Coast Guard Cutter Polar Star's crew concludes Operation Deep Free... - 0 views

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    Accomplishing its missions, the U.S. Coast Guard Cutter Polar Star (WAGB 10) and crew departed the Antarctic region Tuesday, after 65 days south of the Antarctic Circle in support of Operation Deep Freeze 2025.
Jérôme OLLIER

China and Myanmar Sign Deep Sea Port Deal - @PortTechnology - 0 views

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    China and Myanmar Sign Deep Sea Port Deal.
Jérôme OLLIER

Myanmar Mulls New Deep-Sea Port - @PortTechnology - 0 views

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    Myanmar Mulls New Deep-Sea Port.
Jérôme OLLIER

World's Biggest Automated Cargo Wharf Yangshan Deep-water Port Starts Operation in Shan... - 0 views

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    World's biggest automated cargo wharf, the fourth phase of the Yangshan deep-water port started operation on Sunday. The core technology of the robotic port was developed independently by China. The forth phrase of Yangshan port takes up an area of 2.23 million square meters, whose coastline stretches as long as 2,350 meters. It consists of two 70,000 dead-weight tonnage (DWT) berths and five 50,000 DWT berths.
Jérôme OLLIER

A meta-deep-learning framework for spatio-temporal underwater SSP inversion - @FrontMar... - 0 views

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    Sound speed distribution, represented by a sound speed profile (SSP), is of great significance because the nonuniform distribution of sound speed will cause signal propagation path bending with Snell effect, which brings difficulties in precise underwater localization such as emergency rescue. Compared with conventional SSP measurement methods via the conductivity-temperature-depth (CTD) or sound-velocity profiler (SVP), SSP inversion methods leveraging measured sound field information have better real-time performance, such as matched field process (MFP), compressed sensing (CS) and artificial neural networks (ANN). Due to the difficulty in measuring empirical SSP data, these methods face with over-fitting problem in few-shot learning that decreases the inversion accuracy. To rapidly obtain accurate SSP, we propose a task-driven meta-deep-learning (TDML) framework for spatio-temporal SSP inversion. The common features of SSPs are learned through multiple base learners to accelerate the convergence of the model on new tasks, and the model's sensitivity to the change of sound field data is enhanced via meta training, so as to weaken the over-fitting effect and improve the inversion accuracy. Experiment results show that fast and accurate SSP inversion can be achieved by the proposed TDML method.
Jérôme OLLIER

Improved deep learning method and high-resolution reanalysis model-based intelligent ma... - 0 views

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    Large-scale weather forecasting is critical for ensuring maritime safety and optimizing transoceanic voyages. However, sparse meteorological data, incomplete forecasts, and unreliable communication hinder accurate, high-resolution wind system predictions. This study addresses these challenges to enhance dynamic voyage planning and intelligent ship navigation. We propose IPCA-MHA-DSRU-Net, a novel deep learning model integrating incremental principal component analysis (IPCA) with a spatial-temporal depthwise separable U-Net. Key components include: (1) IPCA preprocessing to reduce dimensionality and noise in 2D wind field data; (2) depthwise-separable convolution (DSC) blocks to minimize parameters and computational costs; (3) multi-head attention (MHA) and residual mechanisms to improve spatial-temporal feature extraction and prediction accuracy. The framework is optimized for real-time onboard deployment under communication constraints. The model achieves high accuracy in high-resolution wind predictions, validated through reanalysis datasets. Experiments demonstrated enhanced path planning efficiency and robustness in dynamic oceanic conditions. The IPCA-MHA-DSRU-Net balances computational efficiency and accuracy, making it viable for resource-limited ships. This novel IPCA application provides a promising alternative for preprocessing large-scale meteorological data.
xiaobaicai

Air Frying Machine,outdoor deep fryers sale-About Us - 0 views

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    Air Frying Machine Since it establishment in September 2000, Shijiazhuang Debao Machinery Co., Ltd. Has become the leader of frying equipment industry with the "Profession, Concentration, Creating value for client"
Jérôme OLLIER

VDR of sunken El Faro has been successfully recovered - @Splash_247 - 0 views

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    The US National Transportation Safety Board (NTSB) has announced that the Voyage Data Recorder (VDR) of sunken cargo vessel El Faro has been successfully recovered. A deep ocean remotely operated underwater vehicle, CURV-21, equipped with special technology was used to perform the recovery. It was transported to the sinking site off the Bahamas by ocean …
Jérôme OLLIER

Deep sea port reportedly built on Tiwi Islands with no obvious official approval - @gua... - 0 views

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    Environment minister orders an urgent investigation into whether a $130m port for the oil and gas industry had appropriate assessments or approval
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