--- _id: '8602' abstract: - lang: eng text: Collective cell migration offers a rich field of study for non-equilibrium physics and cellular biology, revealing phenomena such as glassy dynamics, pattern formation and active turbulence. However, how mechanical and chemical signalling are integrated at the cellular level to give rise to such collective behaviours remains unclear. We address this by focusing on the highly conserved phenomenon of spatiotemporal waves of density and extracellular signal-regulated kinase (ERK) activation, which appear both in vitro and in vivo during collective cell migration and wound healing. First, we propose a biophysical theory, backed by mechanical and optogenetic perturbation experiments, showing that patterns can be quantitatively explained by a mechanochemical coupling between active cellular tensions and the mechanosensitive ERK pathway. Next, we demonstrate how this biophysical mechanism can robustly induce long-ranged order and migration in a desired orientation, and we determine the theoretically optimal wavelength and period for inducing maximal migration towards free edges, which fits well with experimentally observed dynamics. We thereby provide a bridge between the biophysical origin of spatiotemporal instabilities and the design principles of robust and efficient long-ranged migration. acknowledgement: We would like to thank G. Tkacik and all of the members of the Hannezo and Hirashima groups for useful discussions, X. Trepat for help on traction force microscopy and M. Matsuda for use of the lab facility. E.H. acknowledges grants from the Austrian Science Fund (FWF) (P 31639) and the European Research Council (851288). T.H. acknowledges a grant from JST, PRESTO (JPMJPR1949). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 665385 (to D.B.), from JSPS KAKENHI grant no. 17J02107 (to N.H.) and from the SPIRITS 2018 of Kyoto University (to E.H. and T.H.). article_processing_charge: No article_type: original author: - first_name: Daniel R full_name: Boocock, Daniel R id: 453AF628-F248-11E8-B48F-1D18A9856A87 last_name: Boocock orcid: 0000-0002-1585-2631 - first_name: Naoya full_name: Hino, Naoya last_name: Hino - first_name: Natalia full_name: Ruzickova, Natalia id: D2761128-D73D-11E9-A1BF-BA0DE6697425 last_name: Ruzickova - first_name: Tsuyoshi full_name: Hirashima, Tsuyoshi last_name: Hirashima - first_name: Edouard B full_name: Hannezo, Edouard B id: 3A9DB764-F248-11E8-B48F-1D18A9856A87 last_name: Hannezo orcid: 0000-0001-6005-1561 citation: ama: Boocock DR, Hino N, Ruzickova N, Hirashima T, Hannezo EB. Theory of mechanochemical patterning and optimal migration in cell monolayers. Nature Physics. 2021;17:267-274. doi:10.1038/s41567-020-01037-7 apa: Boocock, D. R., Hino, N., Ruzickova, N., Hirashima, T., & Hannezo, E. B. (2021). Theory of mechanochemical patterning and optimal migration in cell monolayers. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-020-01037-7 chicago: Boocock, Daniel R, Naoya Hino, Natalia Ruzickova, Tsuyoshi Hirashima, and Edouard B Hannezo. “Theory of Mechanochemical Patterning and Optimal Migration in Cell Monolayers.” Nature Physics. Springer Nature, 2021. https://doi.org/10.1038/s41567-020-01037-7. ieee: D. R. Boocock, N. Hino, N. Ruzickova, T. Hirashima, and E. B. Hannezo, “Theory of mechanochemical patterning and optimal migration in cell monolayers,” Nature Physics, vol. 17. Springer Nature, pp. 267–274, 2021. ista: Boocock DR, Hino N, Ruzickova N, Hirashima T, Hannezo EB. 2021. Theory of mechanochemical patterning and optimal migration in cell monolayers. Nature Physics. 17, 267–274. mla: Boocock, Daniel R., et al. “Theory of Mechanochemical Patterning and Optimal Migration in Cell Monolayers.” Nature Physics, vol. 17, Springer Nature, 2021, pp. 267–74, doi:10.1038/s41567-020-01037-7. short: D.R. Boocock, N. Hino, N. Ruzickova, T. Hirashima, E.B. Hannezo, Nature Physics 17 (2021) 267–274. date_created: 2020-10-04T22:01:37Z date_published: 2021-02-01T00:00:00Z date_updated: 2023-08-04T11:02:41Z day: '01' department: - _id: EdHa doi: 10.1038/s41567-020-01037-7 ec_funded: 1 external_id: isi: - '000573519500002' intvolume: ' 17' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1101/2020.05.15.096479 month: '02' oa: 1 oa_version: Preprint page: 267-274 project: - _id: 268294B6-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P31639 name: Active mechano-chemical description of the cell cytoskeleton - _id: 05943252-7A3F-11EA-A408-12923DDC885E call_identifier: H2020 grant_number: '851288' name: Design Principles of Branching Morphogenesis - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication: Nature Physics publication_identifier: eissn: - '17452481' issn: - '17452473' publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/wound-healing-waves/ record: - id: '12964' relation: dissertation_contains status: public scopus_import: '1' status: public title: Theory of mechanochemical patterning and optimal migration in cell monolayers type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 17 year: '2021' ... --- _id: '9255' abstract: - lang: eng text: Our ability to trust that a random number is truly random is essential for fields as diverse as cryptography and fundamental tests of quantum mechanics. Existing solutions both come with drawbacks—device-independent quantum random number generators (QRNGs) are highly impractical and standard semi-device-independent QRNGs are limited to a specific physical implementation and level of trust. Here we propose a framework for semi-device-independent randomness certification, using a source of trusted vacuum in the form of a signal shutter. It employs a flexible set of assumptions and levels of trust, allowing it to be applied in a wide range of physical scenarios involving both quantum and classical entropy sources. We experimentally demonstrate our protocol with a photonic setup and generate secure random bits under three different assumptions with varying degrees of security and resulting data rates. acknowledgement: We would like to thank Robert Fickler for discussions about the experimental realization and Marek Sýs for running the NIST randomness test on the data we acquired in the experiment. We would like to thank Ugo Zanforlin, Gerald Buller, Daniel White, and Cristian Bonato for their help with the experiment. M. Pivoluska, M. Plesch, and M.M. acknowledge Czech-Austrian project MultiQUEST (I3053-N27 and GF17-33780L). M. Pivoluska and M. Plesch additionally acknowledge the support of VEGA project 2/0136/19. M.F. acknowledges support from the Polish NCN grant Sonata UMO-2014/14/E/ST2/00020, the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program ERC AdG CERQUTE (grant agreement No 834266), the State Research Agency (AEI) TRANQI (PID2019-106888GB-I00/10.13039/501100011033), the Government of Spain (FIS2020-TRANQI; Severo Ochoa CEX2019-000910-S), Fundació Cellex, Fundació Mir-Puig, and Generalitat de Catalunya (CERCA, AGAUR). M.M., W.M., N.H.V., and C.F. acknowledge support from the QuantERA ERA-NET Co-fund (FWF Project I3773-N36) and the UK Engineering and Physical Sciences Research Council (EPSRC) (EP/P024114/1). article_number: '50' article_processing_charge: No article_type: original author: - first_name: Matej full_name: Pivoluska, Matej last_name: Pivoluska - first_name: Martin full_name: Plesch, Martin last_name: Plesch - first_name: Máté full_name: Farkas, Máté last_name: Farkas - first_name: Natalia full_name: Ruzickova, Natalia id: D2761128-D73D-11E9-A1BF-BA0DE6697425 last_name: Ruzickova - first_name: Clara full_name: Flegel, Clara last_name: Flegel - first_name: Natalia Herrera full_name: Valencia, Natalia Herrera last_name: Valencia - first_name: Will full_name: Mccutcheon, Will last_name: Mccutcheon - first_name: Mehul full_name: Malik, Mehul last_name: Malik - first_name: Edgar A. full_name: Aguilar, Edgar A. last_name: Aguilar citation: ama: Pivoluska M, Plesch M, Farkas M, et al. Semi-device-independent random number generation with flexible assumptions. npj Quantum Information. 2021;7. doi:10.1038/s41534-021-00387-1 apa: Pivoluska, M., Plesch, M., Farkas, M., Ruzickova, N., Flegel, C., Valencia, N. H., … Aguilar, E. A. (2021). Semi-device-independent random number generation with flexible assumptions. Npj Quantum Information. Springer Nature. https://doi.org/10.1038/s41534-021-00387-1 chicago: Pivoluska, Matej, Martin Plesch, Máté Farkas, Natalia Ruzickova, Clara Flegel, Natalia Herrera Valencia, Will Mccutcheon, Mehul Malik, and Edgar A. Aguilar. “Semi-Device-Independent Random Number Generation with Flexible Assumptions.” Npj Quantum Information. Springer Nature, 2021. https://doi.org/10.1038/s41534-021-00387-1. ieee: M. Pivoluska et al., “Semi-device-independent random number generation with flexible assumptions,” npj Quantum Information, vol. 7. Springer Nature, 2021. ista: Pivoluska M, Plesch M, Farkas M, Ruzickova N, Flegel C, Valencia NH, Mccutcheon W, Malik M, Aguilar EA. 2021. Semi-device-independent random number generation with flexible assumptions. npj Quantum Information. 7, 50. mla: Pivoluska, Matej, et al. “Semi-Device-Independent Random Number Generation with Flexible Assumptions.” Npj Quantum Information, vol. 7, 50, Springer Nature, 2021, doi:10.1038/s41534-021-00387-1. short: M. Pivoluska, M. Plesch, M. Farkas, N. Ruzickova, C. Flegel, N.H. Valencia, W. Mccutcheon, M. Malik, E.A. Aguilar, Npj Quantum Information 7 (2021). date_created: 2021-03-21T23:01:19Z date_published: 2021-03-15T00:00:00Z date_updated: 2023-08-07T14:17:26Z day: '15' ddc: - '530' department: - _id: FyKo doi: 10.1038/s41534-021-00387-1 external_id: isi: - '000629173100001' file: - access_level: open_access checksum: 26d3f2a2c8c8fa8c1002028326b45f64 content_type: application/pdf creator: dernst date_created: 2021-03-22T11:09:34Z date_updated: 2021-03-22T11:09:34Z file_id: '9274' file_name: 2021_NPJQuantumInformation_Pivoluska.pdf file_size: 1360271 relation: main_file success: 1 file_date_updated: 2021-03-22T11:09:34Z has_accepted_license: '1' intvolume: ' 7' isi: 1 language: - iso: eng month: '03' oa: 1 oa_version: Published Version publication: npj Quantum Information publication_identifier: eissn: - 2056-6387 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Semi-device-independent random number generation with flexible assumptions tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 7 year: '2021' ... --- _id: '7622' abstract: - lang: eng text: The International Young Physicists' Tournament (IYPT) continued in 2018 in Beijing, China and 2019 in Warsaw, Poland with its 31st and 32nd editions. The IYPT is a modern scientific competition for teams of high school students, also known as the Physics World Cup. It involves long-term theoretical and experimental work focused on solving 17 publicly announced open-ended problems in teams of five. On top of that, teams have to present their solutions in front of other teams and a scientific jury, and get opposed and reviewed by their peers. Here we present a brief information about the competition with a specific focus on one of the IYPT 2018 tasks, the 'Ring Oiler'. This seemingly simple mechanical problem appeared to be of such a complexity that even the dozens of participating teams and jurying scientists were not able to solve all of its subtleties. article_number: '034001' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Martin full_name: Plesch, Martin last_name: Plesch - first_name: Samuel full_name: Plesník, Samuel last_name: Plesník - first_name: Natalia full_name: Ruzickova, Natalia id: D2761128-D73D-11E9-A1BF-BA0DE6697425 last_name: Ruzickova citation: ama: Plesch M, Plesník S, Ruzickova N. The IYPT and the “Ring Oiler” problem. European Journal of Physics. 2020;41(3). doi:10.1088/1361-6404/ab6414 apa: Plesch, M., Plesník, S., & Ruzickova, N. (2020). The IYPT and the “Ring Oiler” problem. European Journal of Physics. IOP Publishing. https://doi.org/10.1088/1361-6404/ab6414 chicago: Plesch, Martin, Samuel Plesník, and Natalia Ruzickova. “The IYPT and the ‘Ring Oiler’ Problem.” European Journal of Physics. IOP Publishing, 2020. https://doi.org/10.1088/1361-6404/ab6414. ieee: M. Plesch, S. Plesník, and N. Ruzickova, “The IYPT and the ‘Ring Oiler’ problem,” European Journal of Physics, vol. 41, no. 3. IOP Publishing, 2020. ista: Plesch M, Plesník S, Ruzickova N. 2020. The IYPT and the ‘Ring Oiler’ problem. European Journal of Physics. 41(3), 034001. mla: Plesch, Martin, et al. “The IYPT and the ‘Ring Oiler’ Problem.” European Journal of Physics, vol. 41, no. 3, 034001, IOP Publishing, 2020, doi:10.1088/1361-6404/ab6414. short: M. Plesch, S. Plesník, N. Ruzickova, European Journal of Physics 41 (2020). date_created: 2020-03-31T11:25:04Z date_published: 2020-02-24T00:00:00Z date_updated: 2023-08-18T10:18:29Z day: '24' ddc: - '530' department: - _id: FyKo doi: 10.1088/1361-6404/ab6414 external_id: arxiv: - '1910.03290' isi: - '000537425400001' file: - access_level: open_access checksum: 47dda164e33b6c0c6c3ed14aad298376 content_type: application/pdf creator: dernst date_created: 2020-04-06T08:53:53Z date_updated: 2020-07-14T12:48:01Z file_id: '7641' file_name: 2020_EuropJourPhysics_Plesch.pdf file_size: 1533672 relation: main_file file_date_updated: 2020-07-14T12:48:01Z has_accepted_license: '1' intvolume: ' 41' isi: 1 issue: '3' language: - iso: eng month: '02' oa: 1 oa_version: Published Version publication: European Journal of Physics publication_identifier: eissn: - '13616404' issn: - '01430807' publication_status: published publisher: IOP Publishing quality_controlled: '1' scopus_import: '1' status: public title: The IYPT and the 'Ring Oiler' problem tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 41 year: '2020' ...