Zobrazeno 1 - 10
of 844
pro vyhledávání: '"Virgà A"'
Publikováno v:
FME Transactions, Vol 45, Iss 3, Pp 323-330 (2017)
The current work studies the influence of the most widely used time-domain techniques for signal to noise ratio (SNR) increase for laser-generated ultrasound (US), employing a low power (150 mW) modulable diode: these methods utilize highly random ps
Externí odkaz:
https://doaj.org/article/f11b72dcd9a04047bc236a6fba1ece6e
Autor:
Ferrante Carino, Virga Alessandra, Benfatto Lara, Martinati Miles, De Fazio Domenico, Sassi Ugo, Fasolato Claudia, Ott Anna K., Postorino Paolo, Yoon Duhee, Cerullo Giulio, Mauri Francesco, Ferrari Andrea C., Scopigno Tullio
Publikováno v:
EPJ Web of Conferences, Vol 205, p 05003 (2019)
The out-of-equilibrium Raman response of graphene is addressed by pulsed laser excitation. Phonon spectrum is rationalized by revisiting the electron-phonon picture in the light of a transient broadening of the Dirac cone.
Externí odkaz:
https://doaj.org/article/dae286571b03499c91440bd448c35696
Publikováno v:
Parasite, Vol 15, Iss 1, Pp 45-52 (2008)
Skrjabinelazia rizzoi n. sp. (Seuratoidea), from Podarcis sicula captured at Cammarata, Agrigento Province, Sicily, is distinct from the 13 known species of the genus, including Skrjabinelazia sp. Rizzo from Catania. It is identified with the followi
Externí odkaz:
https://doaj.org/article/829024585aef45e7a9918de25a6d8259
Autor:
Paparini, Silvia, Virga, Epifanio G.
Chromonic liquid crystals are lyotropic nematic phases whose applications span from food to drug industries. It has recently been suggested that the elastic energy density governing the equilibrium distortions of these materials may be quartic in the
Externí odkaz:
http://arxiv.org/abs/2410.10769
We study spontaneous deformations of a ribbon made of nematic polymer networks and activated under the action of a mechanical load. We show that when such ribbons are activated appropriately, the deformations produced can pull back and perform work a
Externí odkaz:
http://arxiv.org/abs/2408.07502
Autor:
Sonnet, André M., Virga, Epifanio G.
Minimal surfaces are ubiquitous in nature. Here they are considered as geometric objects that bear a deformation content. By refining the resolution of the surface deformation gradient afforded by the polar decomposition theorem, we identify a bendin
Externí odkaz:
http://arxiv.org/abs/2405.16169
Autor:
Ciuchi, Federica, De Santo, Maria Penelope, Paparini, Silvia, Spina, Lorenza, Virga, Epifanio G.
Twisted hedgehogs are defects in spherical cavities with homeotropic anchoring for the nematic director that arise when twist distortions are sufficiently less energetic than splay (and bend) distortions. They bear a characteristic inversion ring, wh
Externí odkaz:
http://arxiv.org/abs/2401.02893
Publikováno v:
Liq. Cryst., 51(6), 936-947, 2024
In this paper, we model the configurations of a system of hard rods by viewing each rod in a cell formed by its neighbors. By minimizing the free energy in the model and performing molecular dynamics, where, in both cases, the shape of the cell is a
Externí odkaz:
http://arxiv.org/abs/2312.00239
Autor:
Paparini, Silvia, Virga, Epifanio G.
The elastic theory of chromonic liquid crystals is not completely established. We know, for example, that for anomalously low twist constants (needed for chromonics) the classical Oseen-Frank theory may entail paradoxical consequences when applied to
Externí odkaz:
http://arxiv.org/abs/2312.00149
Autor:
Virga, Epifanio G.
This paper, originally motivated by a question raised by Wood and Hanna [Soft Matter, 15, 2411 (2019)], shows that pure measures of bending for soft plates can be defined by introducing the class of bending-neutral deformations, finite incremental ch
Externí odkaz:
http://arxiv.org/abs/2308.13378