Results 81 to 90 of about 939,747 (284)

Holomorphic Poisson Manifolds and Holomorphic Lie Algebroids

open access: yes, 2008
We study holomorphic Poisson manifolds and holomorphic Lie algebroids from the viewpoint of real Poisson geometry. We give a characterization of holomorphic Poisson structures in terms of the Poisson Nijenhuis structures of Magri-Morosi and describe a ...
C. Laurent-Gengoux   +4 more
core   +1 more source

3D‐Printed Serial Snap‐Through Architectures for Programmable Mechanical Response

open access: yesAdvanced Engineering Materials, EarlyView.
A serial snap‐through architecture is realized using compact 3D‐printed von Mises truss units arranged in a staged cascade. Their geometry and boundary conditions program multistage mechanical responses with plateaux and re‐hardening regimes. An inverted‐compliance model predicts these behaviors and enables analytical design of programmable force ...
Filipe A. Santos
wiley   +1 more source

Gestion concertée des poissons migrateurs et dynamiques socio-naturelles d'un dispositif, le comité de gestion des poissons migrateurs, entre Garonne et Seine

open access: yesSciences, Eaux & Territoires, 2010
La comparaison du fonctionnement de deux comités de gestion des poissons migrateurs (Garonne et Seine) permet de questionner les différents types de gestion de la biodiversité. Quels en sont les points forts et les points faibles ?
C. BARTHÉLÉMY   +2 more
doaj   +1 more source

Kähler–Poisson algebras

open access: yesJournal of Geometry and Physics, 2019
We introduce K hler-Poisson algebras as analogues of algebras of smooth functions on K hler manifolds, and prove that they share several properties with their classical counterparts on an algebraic level. For instance, the module of inner derivations of a K hler-Poisson algebra is a finitely generated projective module, and allows for a unique ...
Joakim Arnlind, Ahmed Al-Shujary
openaire   +3 more sources

Poisson

open access: yesImpressions d’Extrême-Orient, 2020
Presentation Alai, un ecrivain d'origine tibetaine couronne du prix Maodun Ne en 1959 dans une famille aux racines tibetaines (藏族 Zangzu), Alai vit dans la region du Sichuan peuplee de plusieurs ethnies dont certaines sont tibetaines. Il a passe les trente-six premieres annees de sa vie dans sa ville natale de Barkham (transcrit en chinois Ma’erkang ...
Xiao, Wei, Guyot, Michèle
openaire   +2 more sources

Pentagonal 2D Altermagnets: Material Screening and Altermagnetic Tunneling Junction Device Application

open access: yesAdvanced Functional Materials, EarlyView.
From a database of 170 pentagonal 2D materials, 4 candidates exhibiting altermagnetic ordering are screened. Furthermore, the spin‐splitting and unconventional boundary states in the pentagonal 2D altermagnetic monolayer MnS2 are investigated. A MnS2‐based altermagnetic tunneling junction is designed and, through ab initio quantum transport simulations,
Jianhua Wang   +8 more
wiley   +1 more source

Thelohanellus njinei n. sp. et T. lagdoensis n. sp., Myxosporidies (Myxozoa : Myxosporea) parasites des Schilbeidae et Citharinidae (Poissons Téléostéens) au Cameroun (Afrique Centrale)

open access: yesParasite, 2007
L’examen de Schilbe mystus (Linné, 1758) (Schilbeidae) et Citharinus citharus (Geoffroy Saint-Hilaire, 1809) (Citharinidae), capturés respectivement dans les bassins de la Sanaga à Edéa et de la Bénoué à Lagdo, a révélé la présence de deux espèces ...
Fomena A.   +3 more
doaj   +1 more source

Patterning the Void: Combining L‐Systems with Archimedean Tessellations as a Perspective for Tissue Engineering Scaffolds

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces a novel multi‐scale scaffold design using L‐fractals arranged in Archimedean tessellations for tissue regeneration. Despite similar porosity, tiles display vastly different tensile responses (1–100 MPa) and deformation modes. In vitro experiments with hMSCs show geometry‐dependent growth and activity. Over 55 000 tile combinations
Maria Kalogeropoulou   +4 more
wiley   +1 more source

Mechanical Properties of Architected Polymer Lattice Materials: A Comparative Study of Additive Manufacturing and CAD Using FEM and µ‐CT

open access: yesAdvanced Functional Materials, EarlyView.
This study examines how pore shape and manufacturing‐induced deviations affect the mechanical properties of 3D‐printed lattice materials with constant porosity. Combining µ‐CT analysis, FEM, and compression testing, the authors show that structural imperfections reduce stiffness and strength, while bulk material inhomogeneities probably enhance ...
Oliver Walker   +5 more
wiley   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

open access: yesAdvanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato   +9 more
wiley   +1 more source

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