Sivan Keren Video
artista lirica israeliana
- soprano
- opera
- Israele
- cantante lirico
Ultimo aggiornamento
2024-06-01
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Guillamat Prost Marchetti Toyama Kawaguchi Kageyama Sacks Shani Blanch Kruse Topology 1995 2013 2015 2017 2020 2021
This talk was part of the of the online workshop on "Interdisciplinary Challenges in Nonequilibrium Physics" held April 12 - 16, 2021. Discontinuities within orientational fields configure topological defects [1]. They are often present in materials featuring orientational, nematic, order, and can be found in very diverse areas, which span a vast range of length scales [2]. Interestingly, in active nematic systems, topological defects imply not only strong orientational gradients but also well-defined flow and stress patterns in very localized regions [3]. Recent works have shown the influence of these defects in determining the dynamics of living systems, from cell monolayers [4–6] to simple organisms [7]. Here, we study how nematic monolayers composed of muscle cells self-organize and evolve under circular confinement, which enforces a topological charge S=+1. Under strong confinements, with size competing with the characteristic nematic correlation length, the formation of half-integer defects (s=±1/2) is hampered, resulting in spontaneous cellular arrangements with one single integer defect (s=+1) at the center of the islands, namely, rotating spirals and quasi-static asters [8]. These singularities imply distinct mechanical fields, which lead, eventually, to the localized expression of muscle-specific proteins and the formation of 3D nematic cellular protrusions [9]. [1] P. G. de Gennes and J. Prost, The Physics of Liquid Crystals (Clarendon Press, 1995). [2] M. C. Marchetti, J. F. Joanny, S. Ramaswamy, T. B. Liverpool, J. Prost, M. Rao, and R. A. Simha, Hydrodynamics of Soft Active Matter, Rev. Mod. Phys. 85, 1143 (2013). [3] L. Giomi, Geometry and Topology of Turbulence in Active Nematics, Phys. Rev. X 5, 031003 (2015). [4] G. Duclos, C. Erlenkamper, J.-F. Joanny, and P. Silberzan, Topological Defects in Confined Populations of Spindle-Shaped Cells, Nat Phys 13, 58 (2017). [5] T. B. Saw, A. Doostmohammadi, V. Nier, L. Kocgozlu, S. Thampi, Y. Toyama, P. Marcq, C. T. Lim, J. M. Yeomans, and B. Ladoux, Topological Defects in Epithelia Govern Cell Death and Extrusion, Nature 544, 212 (2017). [6] K. Kawaguchi, R. Kageyama, and M. Sano, Topological Defects Control Collective Dynamics in Neural Progenitor Cell Cultures, Nature 545, 327 (2017). [7] Y. Maroudas-Sacks, L. Garion, L. Shani-Zerbib, A. Livshits, E. Braun, and K. Keren, Topological Defects in the Nematic Order of Actin Fibres as Organization Centres of Hydra Morphogenesis, Nat. Phys. (2020). [8] C. Blanch-Mercader, P. Guillamat, A. Roux, and K. Kruse, Quantifying Material Properties of Cell Monolayers by Analyzing Integer Topological Defects, Phys. Rev. Lett. 126, 028101 (2021). [9] P. Guillamat, C. Blanch-Mercader, K. Kruse, and A. Roux, Integer Topological Defects Organize Stresses Driving Tissue Morphogenesis, BioRxiv 2020.06.02.129262 (2020).
Schubertiade Franz Schubert Eckart Lorenzen Landau Kohn Paley 2017
Franz Schubert - Octet in F mahjor D.803 Performers: Eckart Lorenzen and Liora Altschuller - violins, Amit Landau - viola, Raz Kohn - cello, Guy Tuval - double-bass, Keren Shtecler Dvir - clarinet, Itamar Leshem - french-horn, Richard Paley - bassoon (http•••)
Sivan Keren Weiss Israeli Opera 2022
Sivan Keren- Soprano Galilee orchestra conducted by Maestro Ethan Schmaisser Donna Anna's aria from Don Giovanni/W.A Mozart Recorded live by Ariel Weiss The Israeli Opera, Tel Aviv, 5/3/2022
Sivan Keren Hänsel Weiss Israeli Opera
Gretel's aria from Hänsel und Gretel by E. Humperdink Gretel: Sivan Keren Hänsel: Tamara Navoth Taumännchen: Ksenia Glonty Conductor: David Sebba Stage director: Shirit Lee-Weiss Recorded live in the Israeli Opera, Tel Aviv, Israel Video by David Edri
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- cronologia: Cantanti lirici (Asia).
- Indici (per ordine alfabetico): K...