59 research outputs found
Ho archiepiskopos Syrou kai Tēnou Alexandros Lykourgos en Anglia kata to 1870 /
No full textMode of access: Internet.Gift of the Program in Hellenic Studies with the support of the Stanley J. Seeger Hellenic Fund
Ἐρωτικὰ Παθήματα des Parthenios von Nikaia: zwischen Leidenschaften und Vernunft
No full textLes Ἐρωτικὰ Παθήματα de Parthénios de Nicée est l’unique œuvre conservée d’un auteur grec aujourd’hui peu connu malgré son évident succès au Ier siècle av. J.-C. Cet écrivain lettré originaire de Nicée, ramené comme esclave à Rome lors des guerres contre Mithridate puis libéré grâce à son talent littéraire était surtout apprécié pour sa poésie. Le hasard de la tradition manuscrite ne nous a cependant transmis que ce petit recueil en prose dédié au célèbre poète latin, Cornélius Gallus. L’opuscule a l’originalité de rassembler trente-six résumés d’histoire d’amour à l’issue malheureuse voire tragique. Au fil des récits, l’auteur raconte les conséquences funestes d’émotions démesurées comme la folie amoureuse sur les protagonistes, symboles du genre humain. Sur base d’une analyse philologique et sémantique minutieuse, l’exposé aura donc pour but de présenter le traitement littéraire de la passion et de son opposé, la raison dans cet ouvrage si particulier de Parthénios
Adaptive composites incorporating shape memory alloy wires. Part 2: development of internal recovery stresses as a function of activation temperature
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Time dependent resistance and inductance of the laser discharge in a pulsed gas laser through waveforms of the voltage and current
No full textNanostructured Heteroarm Star Block Terpolymers via an Extension of the "In-Out'' Polymerization Route
No full textAssessing micromechanical behaviour of PET cords in rubber matrix composites by laser Raman microscopy
No full textThe mechanical behaviour of PET cord-rubber composites has been investigated by adopting a multi-scale approach by combining standard tensile testing and laser Raman microscopy (LRM). Tensile tests were performed on cord-rubber composite and on its constituents to gain information on the mechanical response at the macro-scale. The behaviour at smaller scales was assessed by means of LRM, which has already been established as a technique that can yield values of stress or strain of reinforcement at the micro-scale. The effects of cord content, composite configuration and sample length have been examined. In particular, the efficiency of stress/ strain transfer to the embedded cord has been evaluated and correlated to the micromechanical behaviour through the ‘finite fibre length effect’ observed at the macro-scale
Reversible Loss of Bernal Stacking during the Deformation of Few-Layer Graphene in Nanocomposites
No full textThe deformation of nanocomposites containing graphene flakes with different numbers of layers has been investigated with the use of Raman spectroscopy. It has been found that there is a shift of the 2D band to lower wavenumber and that the rate of band shift per unit strain tends to decrease as the number of graphene layers increases. It has been demonstrated that band broadening takes place during tensile deformation for mono- and bi-layer graphene but that band narrowing occurs when the number of graphene layers is more than two. It is also found that the characteristic asymmetric shape of the 2D Raman band for the graphene with three or more layers changes to a symmetrical shape above about 0.4% strain and that it reverts to an asymmetric shape on unloading. This change in Raman band shape and width has been interpreted as being due to a reversible loss of Bernal stacking in the few-layer graphene during deformation. It has been shown that the elastic strain energy released from the unloading of the inner graphene layers in the few-layer material (0.2 meV/atom) is similar to the accepted value of the stacking fault energies of graphite and few layer graphene. It is further shown that this loss of Bernal stacking can be accommodated by the formation of arrays of partial dislocations and stacking faults on the basal plane. The effect of the reversible loss of Bernal stacking upon the electronic structure of few-layer graphene and possibility of using it to modify the electronic structure of few-layer graphene is discussed
GRAPHENE UNDER UNIAXIAL DEFORMATION: A RAMAN STUDY
No full textThe presented work summarizes various aspects of uniaxial deformation in monolayer graphene studied by means of Raman spectroscopy. Graphene flakes were subjected to tension - compression uniaxial loading using the cantilever beam technique. The evolution of the Raman single-resonance (G) and double-resonance (2D) bands was monitored at strain levels < 1%. The position of all peaks redshifts under tension and blueshifts under compression. The G peak splitting into two sub-bands (G(-) and G(+)) which is caused by symmetry lowering, is observed in both strain directions. The sub-bands' intensities are used to calculate the crystal lattice orientation of the measured graphene flakes with respect to the strain axis. The nature and splitting of the 2D band even in the unstrained flakes, when excited by the 785 nm (1.58 eV) laser line, is interpreted as the interplay between two distinct double resonance scattering processes
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