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RCS reduction method with anomalous reflection metasurfaces using Floquet analysis : design modelling and measurement

Autor: Elineau, Matthieu, Loison, Renaud, Méric, Stéphane, Gillard, Raphaël, Pagani, Pascal, Mazé-Merceur, Geneviève, Pouliguen, Philippe

This letter proposes the design and measurement of a periodic metasurface that achieves anomalous reflection with reduced RCS in a given direction. A previous study proposed a semi-analytical model to predict the RCS behaviour of such a metasurface.

Externí odkaz: http://arxiv.org/abs/2401.00858

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Akademický článek

First release of the Pelagic Size Structure database: global datasets of marine size spectra obtained from plankton imaging devices

Publikováno v: Earth System Science Data, Vol 16, Pp 2971-2999 (2024)

In marine ecosystems, most physiological, ecological, or physical processes are size dependent. These include metabolic rates, the uptake of carbon and other nutrients, swimming and sinking velocities, and trophic interactions, which eventually deter

Externí odkaz: https://doaj.org/article/468043e78107403f870608f0951a28b2

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Open science resources from the Tara Pacific expedition across coral reef and surface ocean ecosystems

Autor: Fabien Lombard, Guillaume Bourdin, Stéphane Pesant, Sylvain Agostini, Alberto Baudena, Emilie Boissin, Nicolas Cassar, Megan Clampitt, Pascal Conan, Ophélie Da Silva, Céline Dimier, Eric Douville, Amanda Elineau, Jonathan Fin, J. Michel Flores, Jean-François Ghiglione, Benjamin C. C. Hume, Laetitia Jalabert, Seth G. John, Rachel L. Kelly, Ilan Koren, Yajuan Lin, Dominique Marie, Ryan McMinds, Zoé Mériguet, Nicolas Metzl, David A. Paz-García, Maria Luiza Pedrotti, Julie Poulain, Mireille Pujo-Pay, Joséphine Ras, Gilles Reverdin, Sarah Romac, Alice Rouan, Eric Röttinger, Assaf Vardi, Christian R. Voolstra, Clémentine Moulin, Guillaume Iwankow, Bernard Banaigs, Chris Bowler, Colomban de Vargas, Didier Forcioli, Paola Furla, Pierre E. Galand, Eric Gilson, Stéphanie Reynaud, Shinichi Sunagawa, Matthew B. Sullivan, Olivier P. Thomas, Romain Troublé, Rebecca Vega Thurber, Patrick Wincker, Didier Zoccola, Denis Allemand, Serge Planes, Emmanuel Boss, Gaby Gorsky

Publikováno v: Scientific Data, Vol 10, Iss 1, Pp 1-25 (2023)

Abstract The Tara Pacific expedition (2016–2018) sampled coral ecosystems around 32 islands in the Pacific Ocean and the ocean surface waters at 249 locations, resulting in the collection of nearly 58 000 samples. The expedition was designed to sys

Externí odkaz: https://doaj.org/article/27024bf2f35040ec963318f0b62e712c

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Akademický článek

A global marine particle size distribution dataset obtained with the Underwater Vision Profiler 5

Publikováno v: Earth System Science Data, Vol 14, Pp 4315-4337 (2022)

Marine particles of different nature are found throughout the global ocean. The term “marine particles” describes detritus aggregates and fecal pellets as well as bacterioplankton, phytoplankton, zooplankton and nekton. Here, we present a global

Externí odkaz: https://doaj.org/article/9bffe6adc8244269b5cb223885d4367e

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Siliceous Rhizaria abundances and diversity in the Mediterranean Sea assessed by combined imaging and metabarcoding approaches

Autor: Natalia Llopis Monferrer, Tristan Biard, Miguel M. Sandin, Fabien Lombard, Marc Picheral, Amanda Elineau, Lionel Guidi, Aude Leynaert, Paul J. Tréguer, Fabrice Not

Publikováno v: Frontiers in Marine Science, Vol 9 (2022)

Siliceous Rhizaria (polycystine radiolarians and phaeodarians) are significant contributors to carbon and silicon biogeochemical cycles. Considering their broad taxonomic diversity and their wide size range (from a few micrometres up to several milli

Externí odkaz: https://doaj.org/article/45f711e95b6c4c6b85dec2e6699294d6

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Macroscale patterns of oceanic zooplankton composition and size structure

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-19 (2021)

Abstract Ocean plankton comprise organisms from viruses to fish larvae that are fundamental to ecosystem functioning and the provision of marine services such as fisheries and CO2 sequestration. The latter services are partly governed by variations i

Externí odkaz: https://doaj.org/article/b1e15d37490542f1987ff15153b8be78

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Cross-Hemisphere Study Reveals Geographically Ubiquitous, Plastic-Specific Bacteria Emerging from the Rare and Unexplored Biosphere

Autor: Brittan S. Scales, Rachel N. Cable, Melissa B. Duhaime, Gunnar Gerdts, Franziska Fischer, Dieter Fischer, Stephanie Mothes, Lisa Hintzki, Lynn Moldaenke, Matthias Ruwe, Jörn Kalinowski, Bernd Kreikemeyer, Maria-Luiza Pedrotti, Gaby Gorsky, Amanda Elineau, Matthias Labrenz, Sonja Oberbeckmann

Publikováno v: mSphere, Vol 6, Iss 3 (2021)

This study represents one of the largest comparisons of biofilms from environmentally sampled plastic and nonplastic particles from aquatic environments. By including particles sampled through three separate campaigns in the Baltic, Sargasso, and Med

Externí odkaz: https://doaj.org/article/85a2efcae7034daba0bbd22723ea2ed5

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RCS prediction and optimization for anomalous reflection metasurfaces using Floquet analysis

Autor: Matthieu Elineau, Renaud Loison, Stéphane Méric, Raphaël Gillard, Pascal Pagani, Geneviève Mazé-Merceur, Philippe Pouliguen

Publikováno v: International Journal of Microwave and Wireless Technologies
International Journal of Microwave and Wireless Technologies, 2023, ⟨10.1017/S1759078722001398⟩

Due to their periodic nature, metasurfaces used to perform anomalous reflection raise parasitic harmonic reflections. We show a classical synthesis example of such a structure and highlight its limitations. Floquet analysis and its associated simulat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57cef412058dd3f7e6f54eb5b30d4712
https://doi.org/10.1017/s1759078722001398

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