Search results for "Multi-layer"

showing 3 items of 23 documents

Appropriazione e (ri)semantizzazione dello spazio urbano: lo sport in una piazza palermitana

2019

Il contributo, attraverso uno studio di campo, con un approccio geografico culturale esplora le modalità attraverso cui uno spazio urbano, piazza Vittorio Emanuele Orlando a Palermo, può essere oggetto di complessi processi di (ri)semantizzazione. La piazza diviene infatti luogo per sport giovanili improvvisati, al centro di dialettiche opposte (ufficialità/improvisazione) e di forme multistratificate di socialità e aggregazione.

The chapter through a field study with a cultural geographical approach explores the ways in which urban space Piazza Vittorio Emanuele Orlando in Palermo can be the subject of complex processes of (re) semantization. In fact the square becomes a place for improvised youth sports at the center of opposing dialectics (official/improvisation) and multi-layered forms of socializing and aggregation.
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Palladium supported on Halloysite-triazolium salts as catalyst for ligand free Suzuki cross-coupling in water under microwave irradiation

2015

Abstract Environmental friendly halloysite-dicationic triazolium salts (second generation) obtained by subsequent click reactions of a diyne derivative in the presence of 2-azidopropyl-modified halloysite nanotubes, were used as supports for palladium catalyst. Thanks to the high triazolium loading (25%) these materials were able to support higher amount of the metal than that on the monocationic derivative (first generation). Such materials were characterized by thermogravimetric analysis, FT-IR spectroscopy and SEM investigations. The new catalytic system was employed in the ligand free Suzuki cross-coupling under microwave irradiation. A set of solvent, time and% loading of palladium was…

Thermogravimetric analysisSuzuki reactionHalloysite nanotubeInorganic chemistrychemistry.chemical_elementengineering.materialTriazolium saltHalloysiteCatalysisCatalysisMetalchemistry.chemical_compoundMulti-layered ionic liquidTriazolium salt Multi-layered ionic liquids Halloysite nanotubes Suzuki reaction MicrowavePhysical and Theoretical ChemistrySettore CHIM/02 - Chimica FisicaBiphenylProcess Chemistry and TechnologySettore CHIM/06 - Chimica OrganicaSolventchemistryvisual_artvisual_art.visual_art_mediumengineeringLeaching (metallurgy)MicrowavePalladiumJournal of Molecular Catalysis A: Chemical
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A discontinuous Galerkin formulation for variable angle tow composite plates higher-order theories

2020

A discontinuous Galerkin formulation for the mechanical behaviour of Variable Angle Tow multi-layered composite plates is presented. The starting point of the formulation is the strong form of the governing equations, which are obtained by means of the Principle of Virtual Displacement, the Generalized Unified Formulation and the Equivalent Single Layer assumption for the mechanical behaviour of the whole assembly. To obtain the corresponding discontinuous Galerkin formulation, an auxiliary flux variable is introduced and the governing equations are rewritten as a first-order system of partial differential equations. To link neighbouring mesh elements, suitably defined numerical fluxes are …

Variable angle tow composites multi-layered plates higher order theories Discontinuous Galerkin methodsSettore ING-IND/04 - Costruzioni E Strutture Aerospaziali
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