Results 31 to 40 of about 8,365 (254)

Seafloor sediment acoustic property inversion from reflection coefficients with a PSO-BP neural network approach

Frontiers in Marine Science
This study presents an innovative approach for marine sediment parameter inversion based on the Biot theory and the Biot-Stoll model to generate training datasets for a Particle Swarm Optimization-Backpropagation (PSO-BP) neural network.
Junjie Lu, Junjie Lu, Lingxiu Jiang, Lingxiu Jiang, Jinli Wang, Jinli Wang, Lan Chun, Lan Chun, Chenxin Le, Chenxin Le, Fanquan Kong, Fanquan Kong, Fanquan Kong, Shiqiao Liu, Shiqiao Liu, Shiqiao Liu, Guangming Kan   +16 more
doaj   +1 more source

Coral reef carbonate accretion rates track stable gradients in seawater carbonate chemistry across the U.S. Pacific Islands

Frontiers in Marine Science, 2022
The U.S. Pacific Islands span a dramatic natural gradient in climate and oceanographic conditions, and benthic community states vary significantly across the region’s coral reefs.
Hannah C. Barkley, Thomas A. Oliver, Ariel A. Halperin, Ariel A. Halperin, Noah V. Pomeroy, Noah V. Pomeroy, Joy N. Smith, Joy N. Smith, Rebecca M. Weible, Rebecca M. Weible, Charles W. Young, Charles W. Young, Courtney S. Couch, Courtney S. Couch, Russell E. Brainard, Russell E. Brainard, Jennifer C. Samson   +16 more
doaj   +1 more source

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

Advanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source

A Pentaradial and Bilateral Combined Photoreception System in the Sea Cucumber is Mediated by a Blue Light‐Sensitive R‐Opsin

Advanced Science, EarlyView.
The sea cucumber Holothuria leucospilota detects blue and adjacent wavelengths of light via an r‐opsin with a maximum absorption at 459 nm. In the oral tentacles, papillae, and tube feet, distinct light‐sensing structures with specialized morphologies are formed, constituting a unique pentaradial and bilateral combined photoreception system.
Jiasheng Huang, Chunhua Ren, Zhou Qin, Yimeng Cui, Bingbing Zhang, Peng Luo, Xuan Wang, Yaoqi Xie, Xin Zhang, Aifen Yan, Yang Zhang, Dingding Fan, Yang Liu, Wenjie Pan, Xiao Jiang, Lihong Yuan, Haipeng Qin, David M. Irwin, Chaoqun Hu, Yang Liu, Ting Chen   +20 more
wiley   +1 more source

Pre‐Curved Everting Robots With Embedded Steering Intelligence Fabricated by CO2 Laser Welding

Advanced Intelligent Systems, EarlyView.
Design and experimental demonstration of a laser welded growing robot for anatomically guided navigation. The robot follows an aortic arch phantom entering the branchiocephalic branch through steering by design. The figure shows the physical phantom setup, CAD defined weld geometry and full robot eversion.
Brandon Saldarriaga, Panagiotis Kalozoumis, Panagiotis Vartholomeos, Carlo Seneci, Kawal Rhode, Christos Bergeles   +5 more
wiley   +1 more source

Diving into science and conservation: recreational divers can monitor reef assemblages

Perspectives in Ecology and Conservation, 2020
Overfishing, pollution and global changes threaten reef ecosystems all over the world and several conservation actions emerged to reduce and mitigate such impacts.
Edson Aparecido Vieira, Leonardo Rodrigues de Souza, Guilherme Ortigara Longo   +2 more
doaj   +1 more source

A university‐certified course on dossier assessment for regulatory scientists in Africa—Reporting on our 5‐year experience

British Journal of Clinical Pharmacology, EarlyView.
Aim The shortage of trained clinical assessors in African National Regulatory Authorities (NRAs) poses a challenge to effective regulatory decision‐making. Developed in line with the World Health Organization's (WHO) Global Competency Framework (WHO‐GCF), a university‐certified short course, Dossier assessment for clinical assessors in Africa, was ...
Stephanie Leigh, Boitumelo Semete‐Makokotlela, Ivana Škrnjug‐Yudov, David Mukanga, Delese Mimi Darko, Eric Karikari‐Boateng, Peter Stonier, Luther Gwaza, Precious Matsoso, Bernd Rosenkranz, Birka Lehmann, Arnold G. Vulto, John G. Woodland, Shabir Banoo, Frieda Shigwedha, Maphutheho Selikane, Unathi Mabona‐Mgoqi, Asare Yeboah, Ntombi Mthembu, Goonaseelan ( Colin) Pillai   +19 more
wiley   +1 more source

Comparing Low-Cost DIY and Research-Grade Hyperspectral Imaging as Coral Reef Monitoring Tools

Remote Sensing
Hyperspectral imagers (HSIs) enable the non-invasive, spectrally resolved quantification of pigments. HSIs have many environmental research applications, including the monitoring of threatened ecosystems like coral reefs and evaluating the success of ...
Conor A. Hendrickson, Peter Butcherine, Daniel P. Harrison, Brendan P. Kelaher   +3 more
doaj   +1 more source

Bleaching causes loss of disease resistance within the threatened coral species Acropora cervicornis

eLife, 2018
Determining the adaptive potential of foundation species, such as reef-building corals, is urgent as the oceans warm and coral populations decline. Theory predicts that corals may adapt to climate change via selection on standing genetic variation.
Erinn M Muller, Erich Bartels, Iliana B Baums   +2 more
doaj   +1 more source

Snapshot recordings provide a first description of the acoustic signatures of deeper habitats adjacent to coral reefs of Moorea [PDF]

PeerJ, 2017
Acoustic recording has been recognized as a valuable tool for non-intrusive monitoring of the marine environment, complementing traditional visual surveys. Acoustic surveys conducted on coral ecosystems have so far been restricted to barrier reefs and to
Frédéric Bertucci, Eric Parmentier, Cécile Berthe, Marc Besson, Anthony D. Hawkins, Thierry Aubin, David Lecchini   +6 more
doaj   +2 more sources