Woldemar Sacks Videos
Komponist
- Deutschland, Lettland
Letzte Aktualisierung
2024-05-21
Aktualisieren
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).
Morrison Sacks Marton Veress Prey
►The NEW ALBUM, “Rock Aint Dead” Available Now: (http•••) ►Davey Suicide on Spotify: (http•••) ►Davey Suicide Merchandise: (http•••) ►Subscribe here for more cool videos: (http•••) ►Always on the top of the news with the Out Of Line Newsletter: (http•••) -Directed, Filmed & Edited by: Justin Mark Morrison - (http•••) -Assistant Editing by: Davey Suicide -Second Cam Operator: Spencer Sacks -Cast: @PulpFictionally -Produced by: Charles Kallaghan -Mastered by: Shawn McGhee -Vocals by: Gustav Wood of Young Guns -Davey's Performance Make Up by: @KellyEden -Prosthetic Make Up on Pulp & Davey by: @LaneyChantal Artist Website: (http•••) Instagram: (http•••) Facebook: (http•••) Twitter: (http•••) YouTube: (http•••) Tumblr: (http•••) Merch: (http•••) Patreon: (http•••) Davey Suicide - Vocals Niko Gemini - Guitar Derek Obscura - Bass Marton Veress - Drums There’s lines in the streets tonite I’ll find a way to lose my pride again Treat me like an animal I can break the curse Treat me like an animal Love aint meant to hurt Your dancing in the ashes singing Love is for the birds Treat me like an animal Treat me like an animal Your tattooed fingers round my neck I was your prey couldn’t help it Like cigarettes we burn out quick The chase is so much longer than the kill There’s no rules in the wild There is nothing but Cat and mouse on the run Don’t ya want to have fun I’ll find a way to lose my pride again Treat me like an animal I can break the curse Treat me like an animal Love aint meant to hurt Your dancing in the ashes singing Love is for the birds Treat me like an animal Treat me like an animal Sink your teeth sink your teeth in love it when it hurts, baby break the skin Sink your teeth sink your teeth in love it when it hurts, speak the word and I’m in
Dana Zemtsov Carnevale Bloch Sacks Estonian National Symphony Orchestra National Symphony Orchestra
Pre-released as high resolution DSD Download at (http•••) Physical CD and other format downloads available via Channelclassics.com from september 28. - - - One of the biggest dilemmas of our generation is where are we from, who are we, what is our identity? Globalisation has made the whole world closer, bringing our cultures more and more together. I myself am a product of this mix, being born in Mexico to Russian parents with a Jewish background, having studied at a French school in Norway and grown up in Holland. Consequently I have often thought about these questions: which culture is closest to me? What am I? I could feel at home and relate to all these cultures and yet I am not really part of any of them. The music on this album explores the opposite perspective; each piece is very strong influenced by the composer’s culture. One can immediately smell the Hungarian landscape in Bartok’s Viola Concerto, Italian roots in the Carnevale di Venezia, the Jewish soul in Bloch’s Nigun and Russian Orthodox chants in Kugel’s Preghiera. However, there is a deeper meaning to the title of this album, as the programme also touches the spiritual and carnal nature of the human being. During the process of compiling this programme I suddenly realized the strong religious connection between the second movement of the Bartok concerto and the two prayers that follow. This is followed by the contrasting ‘danse macabre’ in the third movement, which for me is very much associated with the carnal ritual of a carnival, when one is allowed to release one’s most primitive instincts. I believe each of these pieces explores the deepest roots of humankind, that core that will be there, no matter where we go or what we do. I am eternally grateful, primarily to Jared Sacks, for the opportunity of going through this unforgettable experience. I could not be happier to have done so with the Estonian National Symphony Orchestra and one of the best musicians I could have wished to collaborate with, the conductor Daniel Raiskin. - Dana Zemtsov
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- Zeitleiste: Komponisten (Europa).
- Indizes (in alphabetischer Reihenfolge): S...