Zobrazeno 1 - 10
of 1 859
pro vyhledávání: '"Kamien A"'
In this work, we investigate the topological properties of knotted defects in smectic liquid crystals. Our story begins with screw dislocations, whose radial surface structure can be smoothly accommodated on $S^3$ for fibred knots by using the corres
Externí odkaz:
http://arxiv.org/abs/2410.04670
Knitting turns a one dimensional yarn into a highly ramified three-dimensional structure. As a method of additive manufacturing, it holds promise for a new class of lightweight, ultrastrong materials. Here we present a purely geometric model to predi
Externí odkaz:
http://arxiv.org/abs/2408.08409
Autor:
Niyonzima, Jean de Dieu, Jeridi, Haifa, Essaoui, Lamya, Tosarelli, Caterina, Vlad, Alina, Coati, Alessandro, Royer, Sebastien, Trimaille, Isabelle, Goldmann, Michel, Gallas, Bruno, Constantin, Doru, Babonneau, David, Garreau, Yves, Croset, Bernard, Kralj, Samo, Kamien, Randall D., Lacaze, Emmanuelle
Smectic liquid crystals can be viewed as model systems for lamellar structures for which there has been extensive theoretical development. We demonstrate that a nonlinear energy description is required with respect to the usual Landau-de Gennes elast
Externí odkaz:
http://arxiv.org/abs/2407.10598
Publikováno v:
PNAS 120 (2023) e2311957120
Focal conic domains, are defects characteristic of layered liquid crystal phases. Their association can built flowers where petals are the ellipses of the Dupin cyclides involved in these defect. We report here the observation of focal conic flowers
Externí odkaz:
http://arxiv.org/abs/2310.09212
Autor:
Severino, Paul G., Kamien, Randall D.
Publikováno v:
Phys. Rev. E 109 (2024) L012701
Volterra's definition of dislocations in crystals distinguishes edge and screw defects geometrically, according to whether the Burgers vector is perpendicular or parallel to the defect. Here, we demonstrate a distinction between screw and edge disloc
Externí odkaz:
http://arxiv.org/abs/2304.07105
Autor:
King, David A., Kamien, Randall D.
Publikováno v:
Phys. Rev. E 107 (2023) 064702
Not every particle that forms a nematic liquid crystal makes a smectic. The particle tip is critical for this behaviour. Ellipsoids do not make a smectic, but sphero-cylinders do. Similarly, only those N-CB alkylcyanobiphenyls with sufficiently long
Externí odkaz:
http://arxiv.org/abs/2301.00267
Autor:
Bauman, Zachary M., Khan, Hason, Phillips, Jakob, Wells, Alyssa, Evans, Charity H., Liu, John L., Kamien, Andrew, Cemaj, Samuel, Sheppard, Olabisi, Lamb, Gina, Veatch, Jessica, Nguyen, Jonathan, Matos, Mike, Cantrell, Emily
Publikováno v:
In Injury December 2024 55(12)
Autor:
Ball, Megan, Bouffler, Sophie E., Barnett, Christopher B., Freckmann, Mary-Louise, Hunter, Matthew F., Kamien, Benjamin, Kassahn, Karin S., Lunke, Sebastian, Patel, Chirag V., Pinner, Jason, Roscioli, Tony, Sandaradura, Sarah A., Scott, Hamish S., Tan, Tiong Y., Wallis, Mathew, Compton, Alison G., Thorburn, David R., Stark, Zornitza, Christodoulou, John
Publikováno v:
In Genetics in Medicine January 2025 27(1)
Publikováno v:
Liquid Crystals Reviews 10 (2022) 91
We review the interpretation of Whitehead products in homotopy theory as an entanglement of topological defects in ordered media.
Comment: 7 pages, figures, the whole megillah
Comment: 7 pages, figures, the whole megillah
Externí odkaz:
http://arxiv.org/abs/2203.07311
Autor:
Blanc, Christophe, Durey, Guillaume, Kamien, Randall D., Lopez-Leon, Teresa, Lavrentovich, Maxim O., Tran, Lisa
The Helfrich-Hurault (HH) elastic instability is a well-known mechanism behind patterns that form as a result of strain upon liquid crystal systems with periodic ground states. In the HH model, layered structures undulate and buckle in response to lo
Externí odkaz:
http://arxiv.org/abs/2109.14668