[{"_id":"14466","day":"10","oa":1,"ddc":["530"],"date_created":"2023-10-30T09:32:28Z","keyword":["turbulence","transition to turbulence","patterns"],"publication_status":"published","file":[{"date_created":"2024-02-15T09:05:21Z","access_level":"open_access","file_size":2804641,"relation":"main_file","creator":"dernst","checksum":"17c64c1fb0d5f73252364bf98b0b9e1a","content_type":"application/pdf","date_updated":"2024-02-15T09:05:21Z","success":1,"file_id":"14996","file_name":"2023_JourFluidMechanics_Marensi.pdf"}],"citation":{"short":"E. Marensi, G. Yalniz, B. Hof, Journal of Fluid Mechanics 974 (2023).","apa":"Marensi, E., Yalniz, G., &#38; Hof, B. (2023). Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2023.780\">https://doi.org/10.1017/jfm.2023.780</a>","mla":"Marensi, Elena, et al. “Dynamics and Proliferation of Turbulent Stripes in Plane-Poiseuille and Plane-Couette Flows.” <i>Journal of Fluid Mechanics</i>, vol. 974, A21, Cambridge University Press, 2023, doi:<a href=\"https://doi.org/10.1017/jfm.2023.780\">10.1017/jfm.2023.780</a>.","ieee":"E. Marensi, G. Yalniz, and B. Hof, “Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows,” <i>Journal of Fluid Mechanics</i>, vol. 974. Cambridge University Press, 2023.","ama":"Marensi E, Yalniz G, Hof B. Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows. <i>Journal of Fluid Mechanics</i>. 2023;974. doi:<a href=\"https://doi.org/10.1017/jfm.2023.780\">10.1017/jfm.2023.780</a>","chicago":"Marensi, Elena, Gökhan Yalniz, and Björn Hof. “Dynamics and Proliferation of Turbulent Stripes in Plane-Poiseuille and Plane-Couette Flows.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2023. <a href=\"https://doi.org/10.1017/jfm.2023.780\">https://doi.org/10.1017/jfm.2023.780</a>.","ista":"Marensi E, Yalniz G, Hof B. 2023. Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows. Journal of Fluid Mechanics. 974, A21."},"external_id":{"isi":["001088363700001"],"arxiv":["2212.12406"]},"doi":"10.1017/jfm.2023.780","author":[{"first_name":"Elena","orcid":"0000-0001-7173-4923","last_name":"Marensi","id":"0BE7553A-1004-11EA-B805-18983DDC885E","full_name":"Marensi, Elena"},{"first_name":"Gökhan","orcid":"0000-0002-8490-9312","last_name":"Yalniz","full_name":"Yalniz, Gökhan","id":"66E74FA2-D8BF-11E9-8249-8DE2E5697425"},{"first_name":"Björn","orcid":"0000-0003-2057-2754","last_name":"Hof","full_name":"Hof, Björn","id":"3A374330-F248-11E8-B48F-1D18A9856A87"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"11","date_updated":"2026-04-07T11:47:05Z","publisher":"Cambridge University Press","year":"2023","corr_author":"1","publication":"Journal of Fluid Mechanics","publication_identifier":{"eissn":["1469-7645"],"issn":["0022-1120"]},"title":"Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows","article_processing_charge":"Yes (via OA deal)","quality_controlled":"1","article_type":"original","abstract":[{"lang":"eng","text":"The first long-lived turbulent structures observable in planar shear flows take the form of localized stripes, inclined with respect to the mean flow direction. The dynamics of these stripes is central to transition, and recent studies proposed an analogy to directed percolation where the stripes’ proliferation is ultimately responsible for the turbulence becoming sustained. In the present study we focus on the internal stripe dynamics as well as on the eventual stripe expansion, and we compare the underlying mechanisms in pressure- and shear-driven planar flows, respectively, plane-Poiseuille and plane-Couette flow. Despite the similarities of the overall laminar–turbulence patterns, the stripe proliferation processes in the two cases are fundamentally different. Starting from the growth and sustenance of individual stripes, we find that in plane-Couette flow new streaks are created stochastically throughout the stripe whereas in plane-Poiseuille flow streak creation is deterministic and occurs locally at the downstream tip. Because of the up/downstream symmetry, Couette stripes, in contrast to Poiseuille stripes, have two weak and two strong laminar turbulent interfaces. These differences in symmetry as well as in internal growth give rise to two fundamentally different stripe splitting mechanisms. In plane-Poiseuille flow splitting is connected to the elongational growth of the original stripe, and it results from a break-off/shedding of the stripe's tail. In plane-Couette flow splitting follows from a broadening of the original stripe and a division along the stripe into two slimmer stripes."}],"file_date_updated":"2024-02-15T09:05:21Z","language":[{"iso":"eng"}],"oa_version":"Published Version","type":"journal_article","status":"public","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"intvolume":"       974","related_material":{"record":[{"id":"19684","relation":"dissertation_contains","status":"public"}]},"volume":974,"arxiv":1,"article_number":"A21","date_published":"2023-11-10T00:00:00Z","acknowledgement":"E.M. acknowledges funding from the ISTplus fellowship programme. G.Y. and B.H. acknowledge a grant from the Simons Foundation (662960, BH).","has_accepted_license":"1","scopus_import":"1","department":[{"_id":"GradSch"},{"_id":"BjHo"}],"isi":1,"project":[{"grant_number":"662960","name":"Revisiting the Turbulence Problem Using Statistical Mechanics","_id":"238598C6-32DE-11EA-91FC-C7463DDC885E"}]},{"file":[{"file_id":"12489","file_name":"2023_JourFluidMechanics_Marensi.pdf","success":1,"date_updated":"2023-02-02T12:34:54Z","creator":"dernst","content_type":"application/pdf","checksum":"9224f987caefe5dd85a70814d3cce65c","relation":"main_file","file_size":1931647,"date_created":"2023-02-02T12:34:54Z","access_level":"open_access"}],"publication_status":"published","ddc":["530"],"date_created":"2023-01-08T23:00:53Z","oa":1,"_id":"12105","day":"10","publication_identifier":{"eissn":["1469-7645"],"issn":["0022-1120"]},"title":"Symmetry-reduced dynamic mode decomposition of near-wall turbulence","publication":"Journal of Fluid Mechanics","date_updated":"2026-04-07T11:47:05Z","publisher":"Cambridge University Press","corr_author":"1","year":"2023","author":[{"last_name":"Marensi","full_name":"Marensi, Elena","id":"0BE7553A-1004-11EA-B805-18983DDC885E","orcid":"0000-0001-7173-4923","first_name":"Elena"},{"first_name":"Gökhan","orcid":"0000-0002-8490-9312","full_name":"Yalniz, Gökhan","id":"66E74FA2-D8BF-11E9-8249-8DE2E5697425","last_name":"Yalniz"},{"id":"3A374330-F248-11E8-B48F-1D18A9856A87","full_name":"Hof, Björn","last_name":"Hof","first_name":"Björn","orcid":"0000-0003-2057-2754"},{"orcid":"0000-0003-0423-5010","first_name":"Nazmi B","id":"3EA1010E-F248-11E8-B48F-1D18A9856A87","full_name":"Budanur, Nazmi B","last_name":"Budanur"}],"doi":"10.1017/jfm.2022.1001","month":"01","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","external_id":{"arxiv":["2101.07516"],"isi":["000903336600001"]},"citation":{"chicago":"Marensi, Elena, Gökhan Yalniz, Björn Hof, and Nazmi B Budanur. “Symmetry-Reduced Dynamic Mode Decomposition of near-Wall Turbulence.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2023. <a href=\"https://doi.org/10.1017/jfm.2022.1001\">https://doi.org/10.1017/jfm.2022.1001</a>.","ama":"Marensi E, Yalniz G, Hof B, Budanur NB. Symmetry-reduced dynamic mode decomposition of near-wall turbulence. <i>Journal of Fluid Mechanics</i>. 2023;954. doi:<a href=\"https://doi.org/10.1017/jfm.2022.1001\">10.1017/jfm.2022.1001</a>","ista":"Marensi E, Yalniz G, Hof B, Budanur NB. 2023. Symmetry-reduced dynamic mode decomposition of near-wall turbulence. Journal of Fluid Mechanics. 954, A10.","apa":"Marensi, E., Yalniz, G., Hof, B., &#38; Budanur, N. B. (2023). Symmetry-reduced dynamic mode decomposition of near-wall turbulence. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2022.1001\">https://doi.org/10.1017/jfm.2022.1001</a>","short":"E. Marensi, G. Yalniz, B. Hof, N.B. Budanur, Journal of Fluid Mechanics 954 (2023).","ieee":"E. Marensi, G. Yalniz, B. Hof, and N. B. Budanur, “Symmetry-reduced dynamic mode decomposition of near-wall turbulence,” <i>Journal of Fluid Mechanics</i>, vol. 954. Cambridge University Press, 2023.","mla":"Marensi, Elena, et al. “Symmetry-Reduced Dynamic Mode Decomposition of near-Wall Turbulence.” <i>Journal of Fluid Mechanics</i>, vol. 954, A10, Cambridge University Press, 2023, doi:<a href=\"https://doi.org/10.1017/jfm.2022.1001\">10.1017/jfm.2022.1001</a>."},"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"intvolume":"       954","volume":954,"related_material":{"record":[{"id":"19684","relation":"dissertation_contains","status":"public"}]},"type":"journal_article","status":"public","language":[{"iso":"eng"}],"oa_version":"Published Version","file_date_updated":"2023-02-02T12:34:54Z","abstract":[{"text":"Data-driven dimensionality reduction methods such as proper orthogonal decomposition and dynamic mode decomposition have proven to be useful for exploring complex phenomena within fluid dynamics and beyond. A well-known challenge for these techniques is posed by the continuous symmetries, e.g. translations and rotations, of the system under consideration, as drifts in the data dominate the modal expansions without providing an insight into the dynamics of the problem. In the present study, we address this issue for fluid flows in rectangular channels by formulating a continuous symmetry reduction method that eliminates the translations in the streamwise and spanwise directions simultaneously. We demonstrate our method by computing the symmetry-reduced dynamic mode decomposition (SRDMD) of sliding windows of data obtained from the transitional plane-Couette and turbulent plane-Poiseuille flow simulations. In the former setting, SRDMD captures the dynamics in the vicinity of the invariant solutions with translation symmetries, i.e. travelling waves and relative periodic orbits, whereas in the latter, our calculations reveal episodes of turbulent time evolution that can be approximated by a low-dimensional linear expansion.","lang":"eng"}],"quality_controlled":"1","article_type":"original","article_processing_charge":"Yes (via OA deal)","project":[{"_id":"238598C6-32DE-11EA-91FC-C7463DDC885E","name":"Revisiting the Turbulence Problem Using Statistical Mechanics","grant_number":"662960"}],"department":[{"_id":"BjHo"}],"isi":1,"scopus_import":"1","has_accepted_license":"1","date_published":"2023-01-10T00:00:00Z","arxiv":1,"article_number":"A10","acknowledgement":"E.M. acknowledges funding from the ISTplus fellowship programme. G.Y. and B.H. acknowledge\r\na grant from the Simons Foundation (662960, BH)."},{"external_id":{"pmid":["37540883"],"arxiv":["2306.05098"],"isi":["001052929900004"]},"citation":{"chicago":"Paranjape, Chaitanya S, Gökhan Yalniz, Yohann Duguet, Nazmi B Budanur, and Björn Hof. “Direct Path from Turbulence to Time-Periodic Solutions.” <i>Physical Review Letters</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevlett.131.034002\">https://doi.org/10.1103/physrevlett.131.034002</a>.","ama":"Paranjape CS, Yalniz G, Duguet Y, Budanur NB, Hof B. Direct path from turbulence to time-periodic solutions. <i>Physical Review Letters</i>. 2023;131(3). doi:<a href=\"https://doi.org/10.1103/physrevlett.131.034002\">10.1103/physrevlett.131.034002</a>","ista":"Paranjape CS, Yalniz G, Duguet Y, Budanur NB, Hof B. 2023. Direct path from turbulence to time-periodic solutions. Physical Review Letters. 131(3), 034002.","short":"C.S. Paranjape, G. Yalniz, Y. Duguet, N.B. Budanur, B. Hof, Physical Review Letters 131 (2023).","apa":"Paranjape, C. S., Yalniz, G., Duguet, Y., Budanur, N. B., &#38; Hof, B. (2023). Direct path from turbulence to time-periodic solutions. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevlett.131.034002\">https://doi.org/10.1103/physrevlett.131.034002</a>","ieee":"C. S. Paranjape, G. Yalniz, Y. Duguet, N. B. Budanur, and B. Hof, “Direct path from turbulence to time-periodic solutions,” <i>Physical Review Letters</i>, vol. 131, no. 3. American Physical Society, 2023.","mla":"Paranjape, Chaitanya S., et al. “Direct Path from Turbulence to Time-Periodic Solutions.” <i>Physical Review Letters</i>, vol. 131, no. 3, 034002, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevlett.131.034002\">10.1103/physrevlett.131.034002</a>."},"month":"07","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"last_name":"Paranjape","id":"3D85B7C4-F248-11E8-B48F-1D18A9856A87","full_name":"Paranjape, Chaitanya S","first_name":"Chaitanya S"},{"orcid":"0000-0002-8490-9312","first_name":"Gökhan","id":"66E74FA2-D8BF-11E9-8249-8DE2E5697425","full_name":"Yalniz, Gökhan","last_name":"Yalniz"},{"first_name":"Yohann","last_name":"Duguet","full_name":"Duguet, Yohann"},{"last_name":"Budanur","id":"3EA1010E-F248-11E8-B48F-1D18A9856A87","full_name":"Budanur, Nazmi B","orcid":"0000-0003-0423-5010","first_name":"Nazmi B"},{"first_name":"Björn","orcid":"0000-0003-2057-2754","last_name":"Hof","full_name":"Hof, Björn","id":"3A374330-F248-11E8-B48F-1D18A9856A87"}],"doi":"10.1103/physrevlett.131.034002","corr_author":"1","year":"2023","publisher":"American Physical Society","date_updated":"2026-04-07T11:47:05Z","publication":"Physical Review Letters","title":"Direct path from turbulence to time-periodic solutions","publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"day":"21","_id":"13274","oa":1,"date_created":"2023-07-24T09:43:59Z","keyword":["General Physics and Astronomy"],"publication_status":"published","issue":"3","acknowledgement":"We thank Baofang Song as well as the developers of Channelflow for sharing their numerical codes, and Mukund Vasudevan and Holger Kantz for fruitful discussions. This work was supported by a grant from the Simons Foundation (662960, B. H.).","date_published":"2023-07-21T00:00:00Z","arxiv":1,"article_number":"034002","scopus_import":"1","isi":1,"department":[{"_id":"GradSch"},{"_id":"BjHo"}],"project":[{"grant_number":"662960","name":"Revisiting the Turbulence Problem Using Statistical Mechanics","_id":"238598C6-32DE-11EA-91FC-C7463DDC885E"}],"pmid":1,"article_processing_charge":"No","article_type":"original","quality_controlled":"1","abstract":[{"lang":"eng","text":"Viscous flows through pipes and channels are steady and ordered until, with increasing velocity, the laminar motion catastrophically breaks down and gives way to turbulence. How this apparently discontinuous change from low- to high-dimensional motion can be rationalized within the framework of the Navier-Stokes equations is not well understood. Exploiting geometrical properties of transitional channel flow we trace turbulence to far lower Reynolds numbers (Re) than previously possible and identify the complete path that reversibly links fully turbulent motion to an invariant solution. This precursor of turbulence destabilizes rapidly with Re, and the accompanying explosive increase in attractor dimension effectively marks the transition between deterministic and de facto stochastic dynamics."}],"oa_version":"Preprint","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2306.05098","open_access":"1"}],"type":"journal_article","status":"public","volume":131,"intvolume":"       131","related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"19684"}]}},{"OA_place":"publisher","supervisor":[{"orcid":"0000-0003-2057-2754","first_name":"Björn","last_name":"Hof","id":"3A374330-F248-11E8-B48F-1D18A9856A87","full_name":"Hof, Björn"}],"date_published":"2023-03-23T00:00:00Z","has_accepted_license":"1","department":[{"_id":"GradSch"},{"_id":"BjHo"}],"type":"dissertation","status":"public","alternative_title":["ISTA Thesis"],"related_material":{"record":[{"status":"public","id":"461","relation":"part_of_dissertation"},{"id":"10791","relation":"part_of_dissertation","status":"public"},{"relation":"part_of_dissertation","id":"7932","status":"public"},{"relation":"part_of_dissertation","id":"10703","status":"public"},{"relation":"new_edition","id":"14530","status":"public"}]},"article_processing_charge":"No","degree_awarded":"PhD","abstract":[{"text":"Most motions of many-body systems at any scale in nature with sufficient degrees\r\nof freedom tend to be chaotic; reaching from the orbital motion of planets, the air\r\ncurrents in our atmosphere, down to the water flowing through our pipelines or\r\nthe movement of a population of bacteria. To the observer it is therefore intriguing\r\nwhen a moving collective exhibits order. Collective motion of flocks of birds, schools\r\nof fish or swarms of self-propelled particles or robots have been studied extensively\r\nover the past decades but the mechanisms involved in the transition from chaos to\r\norder remain unclear. Here, the interactions, that in most systems give rise to chaos,\r\nsustain order. In this thesis we investigate mechanisms that preserve, destabilize\r\nor lead to the ordered state. We show that endothelial cells migrating in circular\r\nconfinements transition to a collective rotating state and concomitantly synchronize\r\nthe frequencies of nucleating actin waves within individual cells. Consequently,\r\nthe frequency dependent cell migration speed uniformizes across the population.\r\nComplementary to the WAVE dependent nucleation of traveling actin waves, we\r\nshow that in leukocytes the actin polymerization depending on WASp generates\r\npushing forces locally at stationary patches. Next, in pipe flows, we study methods\r\nto disrupt the self–sustaining cycle of turbulence and therefore relaminarize the\r\nflow. While we find in pulsating flow conditions that turbulence emerges through a\r\nhelical instability during the decelerating phase. Finally, we show quantitatively in\r\nbrain slices of mice that wild-type control neurons can compensate the migratory\r\ndeficits of a genetically modified neuronal sub–population in the developing cortex.","lang":"eng"}],"file_date_updated":"2023-11-24T11:57:46Z","oa_version":"None","language":[{"iso":"eng"}],"page":"260","corr_author":"1","year":"2023","date_updated":"2026-04-07T13:29:13Z","publisher":"Institute of Science and Technology Austria","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"Bio"}],"title":"Synchronization in collectively moving active matter","publication_identifier":{"issn":["2663-337X"]},"citation":{"short":"M. Riedl, Synchronization in Collectively Moving Active Matter, Institute of Science and Technology Austria, 2023.","apa":"Riedl, M. (2023). <i>Synchronization in collectively moving active matter</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/at:ista:12726\">https://doi.org/10.15479/at:ista:12726</a>","ieee":"M. Riedl, “Synchronization in collectively moving active matter,” Institute of Science and Technology Austria, 2023.","mla":"Riedl, Michael. <i>Synchronization in Collectively Moving Active Matter</i>. Institute of Science and Technology Austria, 2023, doi:<a href=\"https://doi.org/10.15479/at:ista:12726\">10.15479/at:ista:12726</a>.","chicago":"Riedl, Michael. “Synchronization in Collectively Moving Active Matter.” Institute of Science and Technology Austria, 2023. <a href=\"https://doi.org/10.15479/at:ista:12726\">https://doi.org/10.15479/at:ista:12726</a>.","ama":"Riedl M. Synchronization in collectively moving active matter. 2023. doi:<a href=\"https://doi.org/10.15479/at:ista:12726\">10.15479/at:ista:12726</a>","ista":"Riedl M. 2023. Synchronization in collectively moving active matter. Institute of Science and Technology Austria."},"month":"03","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","author":[{"first_name":"Michael","orcid":"0000-0003-4844-6311","id":"3BE60946-F248-11E8-B48F-1D18A9856A87","full_name":"Riedl, Michael","last_name":"Riedl"}],"doi":"10.15479/at:ista:12726","publication_status":"published","file":[{"relation":"main_file","file_size":63734746,"access_level":"closed","date_created":"2023-03-23T12:49:23Z","checksum":"eba0e19fe57a8c15e7aeab55a845efb7","creator":"cchlebak","content_type":"application/pdf","description":"the main file is missing the bibliography. See new thesis record 14530 for updated files.","file_id":"12745","file_name":"Thesis_Riedl_2023.pdf","date_updated":"2023-11-24T11:57:46Z"},{"file_id":"12746","file_name":"Thesis_Riedl_2023_source.rar","date_updated":"2023-09-24T22:30:03Z","content_type":"application/octet-stream","creator":"cchlebak","checksum":"0eb7b650cc8ae843bcec7c8a6109ae03","embargo_to":"open_access","file_size":339473651,"relation":"source_file","access_level":"closed","date_created":"2023-03-23T12:54:34Z"}],"day":"23","_id":"12726","date_created":"2023-03-15T13:22:13Z","ddc":["530"]},{"corr_author":"1","year":"2023","date_updated":"2026-04-07T13:29:59Z","publisher":"Institute of Science and Technology Austria","title":"Adaptive mutation in E. coli modulated by luxS","acknowledged_ssus":[{"_id":"LifeSc"},{"_id":"Bio"},{"_id":"CampIT"}],"publication_identifier":{"issn":["2663-337X"]},"citation":{"ista":"Hennessey-Wesen M. 2023. Adaptive mutation in E. coli modulated by luxS. Institute of Science and Technology Austria.","ama":"Hennessey-Wesen M. Adaptive mutation in E. coli modulated by luxS. 2023. doi:<a href=\"https://doi.org/10.15479/at:ista:14641\">10.15479/at:ista:14641</a>","chicago":"Hennessey-Wesen, Mike. “Adaptive Mutation in E. Coli Modulated by LuxS.” Institute of Science and Technology Austria, 2023. <a href=\"https://doi.org/10.15479/at:ista:14641\">https://doi.org/10.15479/at:ista:14641</a>.","mla":"Hennessey-Wesen, Mike. <i>Adaptive Mutation in E. Coli Modulated by LuxS</i>. Institute of Science and Technology Austria, 2023, doi:<a href=\"https://doi.org/10.15479/at:ista:14641\">10.15479/at:ista:14641</a>.","ieee":"M. Hennessey-Wesen, “Adaptive mutation in E. coli modulated by luxS,” Institute of Science and Technology Austria, 2023.","apa":"Hennessey-Wesen, M. (2023). <i>Adaptive mutation in E. coli modulated by luxS</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/at:ista:14641\">https://doi.org/10.15479/at:ista:14641</a>","short":"M. Hennessey-Wesen, Adaptive Mutation in E. Coli Modulated by LuxS, Institute of Science and Technology Austria, 2023."},"month":"11","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","doi":"10.15479/at:ista:14641","author":[{"full_name":"Hennessey-Wesen, Mike","id":"3F338C72-F248-11E8-B48F-1D18A9856A87","last_name":"Hennessey-Wesen","first_name":"Mike"}],"keyword":["microfluidics","miceobiology","mutations","quorum sensing"],"publication_status":"published","file":[{"access_level":"closed","date_created":"2023-12-06T13:13:26Z","relation":"source_file","file_size":46405919,"embargo_to":"open_access","creator":"mhenness","checksum":"4127c285b34f4bf7fb31ef24f9d14c25","content_type":"application/vnd.oasis.opendocument.text","file_id":"14648","file_name":"mike_thesis_v06-12-2023.odt","date_updated":"2024-11-30T23:30:05Z"},{"embargo":"2026-07-18","date_created":"2023-12-06T13:14:15Z","access_level":"closed","embargo_to":"open_access","file_size":21282155,"relation":"main_file","creator":"mhenness","content_type":"application/pdf","checksum":"f5203a61eddaf35235bbc51904d73982","file_id":"14649","file_name":"mike_thesis_v06-12-2023.pdf","date_updated":"2025-07-17T11:20:25Z"},{"date_updated":"2025-05-20T22:31:34Z","file_name":"2023_Hennessey_Michael_Thesis_print.pdf","file_id":"19720","title":"Print version","description":"for printing purposes only","content_type":"application/pdf","creator":"cchlebak","checksum":"902102d26d30e74dbd6cdd70a65820c3","access_level":"closed","date_created":"2025-05-20T12:59:12Z","relation":"other","embargo_to":"open_access","file_size":45847968}],"day":"30","_id":"14641","ec_funded":1,"date_created":"2023-12-04T13:17:37Z","ddc":["570"],"OA_place":"publisher","project":[{"grant_number":"665385","name":"International IST Doctoral Program","call_identifier":"H2020","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"}],"supervisor":[{"full_name":"Hof, Björn","id":"3A374330-F248-11E8-B48F-1D18A9856A87","last_name":"Hof","first_name":"Björn","orcid":"0000-0003-2057-2754"}],"date_published":"2023-11-30T00:00:00Z","has_accepted_license":"1","department":[{"_id":"GradSch"},{"_id":"BjHo"}],"status":"public","type":"dissertation","alternative_title":["ISTA Thesis"],"article_processing_charge":"No","degree_awarded":"PhD","file_date_updated":"2025-07-17T11:20:25Z","abstract":[{"lang":"eng","text":"Mutation rates represent the net result of complex interactions among various\r\ncellular processes and can dramatically influence the evolutionary fate of\r\nmicrobial populations. However, many popular techniques used to study\r\nmutations are subject to the confounding effects of heredity and the subtleties\r\nof adaptation to selection, all of which make it difficult to observe any dynamic\r\nresponses of mutation rates to fitness challenges. Furthermore, in spite of the\r\nubiquity of quorum sensing systems across the bacterial domain and relevance\r\nfor many physiological behaviors, the effects of such mechanisms on mutation\r\nrate and adaptation remain poorly understood. In the following work, I\r\npresent the development of a microfluidic droplet-based method to measure\r\nsingle base-pair mutation rates in growing populations of the bacterium\r\nEscherichia coli. I use this method to observe a stress-induced increase in\r\nmutation rate that is mediated by luxS, a highly conserved bacterial quorum\r\nsensing component. I also show that the aforementioned increase in mutation\r\nrate, and its associated control by luxS, corresponds to a higher degree of\r\nadaptability under competitive environments."}],"oa_version":"Published Version","page":"104","language":[{"iso":"eng"}]},{"publication_status":"published","file":[{"content_type":"application/pdf","checksum":"1ddd9b91e6dec31ab0e7a8433ca2d452","creator":"dernst","relation":"main_file","file_size":1421256,"date_created":"2022-08-01T08:02:38Z","access_level":"open_access","file_name":"2022_PLoSONE_Budanur.pdf","file_id":"11712","success":1,"date_updated":"2022-08-01T08:02:38Z"}],"issue":"7","oa":1,"date_created":"2022-07-31T22:01:48Z","ddc":["510"],"day":"18","_id":"11704","title":"An autonomous compartmental model for accelerating epidemics","publication_identifier":{"eissn":["1932-6203"]},"year":"2022","corr_author":"1","date_updated":"2025-06-11T13:37:36Z","publisher":"Public Library of Science","publication":"PLoS ONE","month":"07","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"orcid":"0000-0003-0423-5010","first_name":"Nazmi B","id":"3EA1010E-F248-11E8-B48F-1D18A9856A87","full_name":"Budanur, Nazmi B","last_name":"Budanur"},{"orcid":"0000-0003-2057-2754","first_name":"Björn","last_name":"Hof","full_name":"Hof, Björn","id":"3A374330-F248-11E8-B48F-1D18A9856A87"}],"doi":"10.1371/journal.pone.0269975","external_id":{"isi":["000911392100055"],"pmid":["35849565"]},"citation":{"ama":"Budanur NB, Hof B. An autonomous compartmental model for accelerating epidemics. <i>PLoS ONE</i>. 2022;17(7). doi:<a href=\"https://doi.org/10.1371/journal.pone.0269975\">10.1371/journal.pone.0269975</a>","chicago":"Budanur, Nazmi B, and Björn Hof. “An Autonomous Compartmental Model for Accelerating Epidemics.” <i>PLoS ONE</i>. Public Library of Science, 2022. <a href=\"https://doi.org/10.1371/journal.pone.0269975\">https://doi.org/10.1371/journal.pone.0269975</a>.","ista":"Budanur NB, Hof B. 2022. An autonomous compartmental model for accelerating epidemics. PLoS ONE. 17(7), e0269975.","apa":"Budanur, N. B., &#38; Hof, B. (2022). An autonomous compartmental model for accelerating epidemics. <i>PLoS ONE</i>. Public Library of Science. <a href=\"https://doi.org/10.1371/journal.pone.0269975\">https://doi.org/10.1371/journal.pone.0269975</a>","short":"N.B. Budanur, B. Hof, PLoS ONE 17 (2022).","mla":"Budanur, Nazmi B., and Björn Hof. “An Autonomous Compartmental Model for Accelerating Epidemics.” <i>PLoS ONE</i>, vol. 17, no. 7, e0269975, Public Library of Science, 2022, doi:<a href=\"https://doi.org/10.1371/journal.pone.0269975\">10.1371/journal.pone.0269975</a>.","ieee":"N. B. Budanur and B. Hof, “An autonomous compartmental model for accelerating epidemics,” <i>PLoS ONE</i>, vol. 17, no. 7. Public Library of Science, 2022."},"intvolume":"        17","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"volume":17,"related_material":{"record":[{"status":"public","relation":"research_data","id":"11711"}]},"type":"journal_article","status":"public","abstract":[{"text":"In Fall 2020, several European countries reported rapid increases in COVID-19 cases along with growing estimates of the effective reproduction rates. Such an acceleration in epidemic spread is usually attributed to time-dependent effects, e.g. human travel, seasonal behavioral changes, mutations of the pathogen etc. In this case however the acceleration occurred when counter measures such as testing and contact tracing exceeded their capacity limit. Considering Austria as an example, here we show that this dynamics can be captured by a time-independent, i.e. autonomous, compartmental model that incorporates these capacity limits. In this model, the epidemic acceleration coincides with the exhaustion of mitigation efforts, resulting in an increasing fraction of undetected cases that drive the effective reproduction rate progressively higher. We demonstrate that standard models which does not include this effect necessarily result in a systematic underestimation of the effective reproduction rate.","lang":"eng"}],"file_date_updated":"2022-08-01T08:02:38Z","oa_version":"Published Version","language":[{"iso":"eng"}],"article_processing_charge":"No","article_type":"original","quality_controlled":"1","pmid":1,"scopus_import":"1","department":[{"_id":"BjHo"}],"isi":1,"date_published":"2022-07-18T00:00:00Z","article_number":"e0269975","has_accepted_license":"1"},{"author":[{"id":"3EA1010E-F248-11E8-B48F-1D18A9856A87","full_name":"Budanur, Nazmi B","last_name":"Budanur","orcid":"0000-0003-0423-5010","first_name":"Nazmi B"}],"doi":"10.5281/ZENODO.6802720","user_id":"6785fbc1-c503-11eb-8a32-93094b40e1cf","month":"07","department":[{"_id":"BjHo"}],"date_published":"2022-07-06T00:00:00Z","citation":{"ama":"Budanur NB. burakbudanur/autoacc-public. 2022. doi:<a href=\"https://doi.org/10.5281/ZENODO.6802720\">10.5281/ZENODO.6802720</a>","chicago":"Budanur, Nazmi B. “Burakbudanur/Autoacc-Public.” Zenodo, 2022. <a href=\"https://doi.org/10.5281/ZENODO.6802720\">https://doi.org/10.5281/ZENODO.6802720</a>.","ista":"Budanur NB. 2022. burakbudanur/autoacc-public, Zenodo, <a href=\"https://doi.org/10.5281/ZENODO.6802720\">10.5281/ZENODO.6802720</a>.","apa":"Budanur, N. B. (2022). burakbudanur/autoacc-public. Zenodo. <a href=\"https://doi.org/10.5281/ZENODO.6802720\">https://doi.org/10.5281/ZENODO.6802720</a>","short":"N.B. Budanur, (2022).","mla":"Budanur, Nazmi B. <i>Burakbudanur/Autoacc-Public</i>. Zenodo, 2022, doi:<a href=\"https://doi.org/10.5281/ZENODO.6802720\">10.5281/ZENODO.6802720</a>.","ieee":"N. B. Budanur, “burakbudanur/autoacc-public.” Zenodo, 2022."},"has_accepted_license":"1","title":"burakbudanur/autoacc-public","date_updated":"2025-06-11T13:37:36Z","publisher":"Zenodo","corr_author":"1","year":"2022","oa":1,"abstract":[{"text":"Codes and data for reproducing the results of N. B. Budanur and B. Hof \"An autonomous compartmental model for accelerating epidemics\"","lang":"eng"}],"ddc":["000"],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.5281/ZENODO.6802720"}],"license":"https://creativecommons.org/publicdomain/zero/1.0/","date_created":"2022-08-01T08:06:33Z","oa_version":"Published Version","article_processing_charge":"No","_id":"11711","day":"06","tmp":{"image":"/images/cc_0.png","legal_code_url":"https://creativecommons.org/publicdomain/zero/1.0/legalcode","short":"CC0 (1.0)","name":"Creative Commons Public Domain Dedication (CC0 1.0)"},"related_material":{"record":[{"status":"public","id":"11704","relation":"used_in_publication"}]},"type":"research_data_reference","status":"public"},{"language":[{"iso":"eng"}],"oa_version":"Published Version","file_date_updated":"2023-01-24T07:24:37Z","abstract":[{"lang":"eng","text":"Standard epidemic models exhibit one continuous, second order phase transition to macroscopic outbreaks. However, interventions to control outbreaks may fundamentally alter epidemic dynamics. Here we reveal how such interventions modify the type of phase transition. In particular, we uncover three distinct types of explosive phase transitions for epidemic dynamics with capacity-limited interventions. Depending on the capacity limit, interventions may (i) leave the standard second order phase transition unchanged but exponentially suppress the probability of large outbreaks, (ii) induce a first-order discontinuous transition to macroscopic outbreaks, or (iii) cause a secondary explosive yet continuous third-order transition. These insights highlight inherent limitations in predicting and containing epidemic outbreaks. More generally our study offers a cornerstone example of a third-order explosive phase transition in complex systems."}],"quality_controlled":"1","article_type":"original","article_processing_charge":"No","volume":3,"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"intvolume":"         3","type":"journal_article","status":"public","department":[{"_id":"BjHo"}],"scopus_import":"1","has_accepted_license":"1","article_number":"04LT02","date_published":"2022-10-25T00:00:00Z","acknowledgement":"We acknowledge support from the Volkswagen Foundation under Grant No. 99720 and the German Federal Ministry for Education and Research (BMBF) under Grant No. 16ICR01. This research was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—EXC-2068—390729961—Cluster of Excellence Physics of Life of TU Dresden.","ddc":["530"],"date_created":"2023-01-12T12:03:43Z","oa":1,"_id":"12134","day":"25","issue":"4","file":[{"success":1,"file_name":"2022_JourPhysics_Boerner.pdf","file_id":"12350","date_updated":"2023-01-24T07:24:37Z","file_size":1006106,"relation":"main_file","access_level":"open_access","date_created":"2023-01-24T07:24:37Z","content_type":"application/pdf","creator":"dernst","checksum":"35c5c5cb0eb17ea1b5184755daab9fc9"}],"publication_status":"published","keyword":["Artificial Intelligence","Computer Networks and Communications","Computer Science Applications","Information Systems"],"doi":"10.1088/2632-072x/ac99cd","author":[{"last_name":"Börner","full_name":"Börner, Georg","first_name":"Georg"},{"full_name":"Schröder, Malte","last_name":"Schröder","first_name":"Malte"},{"last_name":"Scarselli","full_name":"Scarselli, Davide","id":"40315C30-F248-11E8-B48F-1D18A9856A87","first_name":"Davide","orcid":"0000-0001-5227-4271"},{"first_name":"Nazmi B","orcid":"0000-0003-0423-5010","id":"3EA1010E-F248-11E8-B48F-1D18A9856A87","full_name":"Budanur, Nazmi B","last_name":"Budanur"},{"first_name":"Björn","orcid":"0000-0003-2057-2754","id":"3A374330-F248-11E8-B48F-1D18A9856A87","full_name":"Hof, Björn","last_name":"Hof"},{"last_name":"Timme","full_name":"Timme, Marc","first_name":"Marc"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"10","citation":{"short":"G. Börner, M. Schröder, D. Scarselli, N.B. Budanur, B. Hof, M. Timme, Journal of Physics: Complexity 3 (2022).","apa":"Börner, G., Schröder, M., Scarselli, D., Budanur, N. B., Hof, B., &#38; Timme, M. (2022). Explosive transitions in epidemic dynamics. <i>Journal of Physics: Complexity</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/2632-072x/ac99cd\">https://doi.org/10.1088/2632-072x/ac99cd</a>","ieee":"G. Börner, M. Schröder, D. Scarselli, N. B. Budanur, B. Hof, and M. Timme, “Explosive transitions in epidemic dynamics,” <i>Journal of Physics: Complexity</i>, vol. 3, no. 4. IOP Publishing, 2022.","mla":"Börner, Georg, et al. “Explosive Transitions in Epidemic Dynamics.” <i>Journal of Physics: Complexity</i>, vol. 3, no. 4, 04LT02, IOP Publishing, 2022, doi:<a href=\"https://doi.org/10.1088/2632-072x/ac99cd\">10.1088/2632-072x/ac99cd</a>.","chicago":"Börner, Georg, Malte Schröder, Davide Scarselli, Nazmi B Budanur, Björn Hof, and Marc Timme. “Explosive Transitions in Epidemic Dynamics.” <i>Journal of Physics: Complexity</i>. IOP Publishing, 2022. <a href=\"https://doi.org/10.1088/2632-072x/ac99cd\">https://doi.org/10.1088/2632-072x/ac99cd</a>.","ama":"Börner G, Schröder M, Scarselli D, Budanur NB, Hof B, Timme M. Explosive transitions in epidemic dynamics. <i>Journal of Physics: Complexity</i>. 2022;3(4). doi:<a href=\"https://doi.org/10.1088/2632-072x/ac99cd\">10.1088/2632-072x/ac99cd</a>","ista":"Börner G, Schröder M, Scarselli D, Budanur NB, Hof B, Timme M. 2022. Explosive transitions in epidemic dynamics. Journal of Physics: Complexity. 3(4), 04LT02."},"publication_identifier":{"issn":["2632-072X"]},"title":"Explosive transitions in epidemic dynamics","publication":"Journal of Physics: Complexity","date_updated":"2023-02-13T09:15:13Z","publisher":"IOP Publishing","year":"2022"},{"department":[{"_id":"BjHo"}],"isi":1,"scopus_import":"1","arxiv":1,"date_published":"2022-11-07T00:00:00Z","article_number":"A21","acknowledgement":"K.D.’s research was supported by an Australian Research Council Discovery Early Career\r\nResearcher Award (DE170100171). B.W., R.A., F.M. and A.M. research was supported by the Spanish Ministerio de Economía y Competitivdad (grant numbers FIS2016-77849-R and FIS2017-85794-P) and Ministerio de Ciencia e Innovación (grant number PID2020-114043GB-I00) and the Generalitat de Catalunya (grant 2017-SGR-785). B.W.’s research was also supported by the Chinese Scholarship Council (grant CSC no. 201806440152).","main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2207.12990"}],"language":[{"iso":"eng"}],"oa_version":"Preprint","abstract":[{"text":"We investigate the local self-sustained process underlying spiral turbulence in counter-rotating Taylor–Couette flow using a periodic annular domain, shaped as a parallelogram, two of whose sides are aligned with the cylindrical helix described by the spiral pattern. The primary focus of the study is placed on the emergence of drifting–rotating waves (DRW) that capture, in a relatively small domain, the main features of coherent structures typically observed in developed turbulence. The transitional dynamics of the subcritical region, far below the first instability of the laminar circular Couette flow, is determined by the upper and lower branches of DRW solutions originated at saddle-node bifurcations. The mechanism whereby these solutions self-sustain, and the chaotic dynamics they induce, are conspicuously reminiscent of other subcritical shear flows. Remarkably, the flow properties of DRW persist even as the Reynolds number is increased beyond the linear stability threshold of the base flow. Simulations in a narrow parallelogram domain stretched in the azimuthal direction to revolve around the apparatus a full turn confirm that self-sustained vortices eventually concentrate into a localised pattern. The resulting statistical steady state satisfactorily reproduces qualitatively, and to a certain degree also quantitatively, the topology and properties of spiral turbulence as calculated in a large periodic domain of sufficient aspect ratio that is representative of the real system.","lang":"eng"}],"quality_controlled":"1","article_type":"original","article_processing_charge":"No","intvolume":"       951","volume":951,"type":"journal_article","status":"public","doi":"10.1017/jfm.2022.828","author":[{"last_name":"Wang","full_name":"Wang, B.","first_name":"B."},{"orcid":"0000-0001-6572-0621","first_name":"Roger","last_name":"Ayats López","id":"ab77522d-073b-11ed-8aff-e71b39258362","full_name":"Ayats López, Roger"},{"full_name":"Deguchi, K.","last_name":"Deguchi","first_name":"K."},{"first_name":"F.","last_name":"Mellibovsky","full_name":"Mellibovsky, F."},{"first_name":"A.","last_name":"Meseguer","full_name":"Meseguer, A."}],"month":"11","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"ista":"Wang B, Ayats López R, Deguchi K, Mellibovsky F, Meseguer A. 2022. Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow. Journal of Fluid Mechanics. 951, A21.","ama":"Wang B, Ayats López R, Deguchi K, Mellibovsky F, Meseguer A. Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow. <i>Journal of Fluid Mechanics</i>. 2022;951. doi:<a href=\"https://doi.org/10.1017/jfm.2022.828\">10.1017/jfm.2022.828</a>","chicago":"Wang, B., Roger Ayats López, K. Deguchi, F. Mellibovsky, and A. Meseguer. “Self-Sustainment of Coherent Structures in Counter-Rotating Taylor–Couette Flow.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2022. <a href=\"https://doi.org/10.1017/jfm.2022.828\">https://doi.org/10.1017/jfm.2022.828</a>.","mla":"Wang, B., et al. “Self-Sustainment of Coherent Structures in Counter-Rotating Taylor–Couette Flow.” <i>Journal of Fluid Mechanics</i>, vol. 951, A21, Cambridge University Press, 2022, doi:<a href=\"https://doi.org/10.1017/jfm.2022.828\">10.1017/jfm.2022.828</a>.","ieee":"B. Wang, R. Ayats López, K. Deguchi, F. Mellibovsky, and A. Meseguer, “Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow,” <i>Journal of Fluid Mechanics</i>, vol. 951. Cambridge University Press, 2022.","short":"B. Wang, R. Ayats López, K. Deguchi, F. Mellibovsky, A. Meseguer, Journal of Fluid Mechanics 951 (2022).","apa":"Wang, B., Ayats López, R., Deguchi, K., Mellibovsky, F., &#38; Meseguer, A. (2022). Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2022.828\">https://doi.org/10.1017/jfm.2022.828</a>"},"external_id":{"isi":["000879446900001"],"arxiv":["2207.12990"]},"publication_identifier":{"eissn":["1469-7645"],"issn":["0022-1120"]},"title":"Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow","publication":"Journal of Fluid Mechanics","publisher":"Cambridge University Press","date_updated":"2023-08-04T08:54:16Z","year":"2022","date_created":"2023-01-12T12:04:17Z","oa":1,"_id":"12137","day":"07","publication_status":"published","keyword":["Mechanical Engineering","Mechanics of Materials","Condensed Matter Physics","Applied Mathematics"]},{"type":"journal_article","status":"public","intvolume":"        34","volume":34,"article_type":"original","quality_controlled":"1","article_processing_charge":"No","oa_version":"Submitted Version","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://upcommons.upc.edu/handle/2117/385635","open_access":"1"}],"abstract":[{"lang":"eng","text":"In this paper, we explore the stability and dynamical relevance of a wide variety of steady, time-periodic, quasiperiodic, and chaotic flows arising between orthogonally stretching parallel plates. We first explore the stability of all the steady flow solution families formerly identified by Ayats et al. [“Flows between orthogonally stretching parallel plates,” Phys. Fluids 33, 024103 (2021)], concluding that only the one that originates from the Stokesian approximation is actually stable. When both plates are shrinking at identical or nearly the same deceleration rates, this Stokesian flow exhibits a Hopf bifurcation that leads to stable time-periodic regimes. The resulting time-periodic orbits or flows are tracked for different Reynolds numbers and stretching rates while monitoring their Floquet exponents to identify secondary instabilities. It is found that these time-periodic flows also exhibit Neimark–Sacker bifurcations, generating stable quasiperiodic flows (tori) that may sometimes give rise to chaotic dynamics through a Ruelle–Takens–Newhouse scenario. However, chaotic dynamics is unusually observed, as the quasiperiodic flows generally become phase-locked through a resonance mechanism before a strange attractor may arise, thus restoring the time-periodicity of the flow. In this work, we have identified and tracked four different resonance regions, also known as Arnold tongues or horns. In particular, the 1 : 4 strong resonance region is explored in great detail, where the identified scenarios are in very good agreement with normal form theory. "}],"acknowledgement":"This work was supported by the Spanish MINECO under Grant Nos. FIS2017-85794-P and PRX18/00179, the Spanish MICINN through Grant No. PID2020-114043GB-I00, and the\r\nGeneralitat de Catalunya under Grant No. 2017-SGR-785. B.W.’s research was also supported by the Chinese Scholarship Council through Grant CSC No. 201806440152.","date_published":"2022-11-04T00:00:00Z","article_number":"114111","department":[{"_id":"BjHo"}],"isi":1,"scopus_import":"1","keyword":["Condensed Matter Physics","Fluid Flow and Transfer Processes","Mechanics of Materials","Computational Mechanics","Mechanical Engineering"],"issue":"11","publication_status":"published","day":"04","_id":"12146","date_created":"2023-01-12T12:06:58Z","oa":1,"publication":"Physics of Fluids","year":"2022","publisher":"AIP Publishing","date_updated":"2023-10-03T11:07:58Z","title":"Phase-locking flows between orthogonally stretching parallel plates","publication_identifier":{"eissn":["1089-7666"],"issn":["1070-6631"]},"citation":{"apa":"Wang, B., Ayats López, R., Meseguer, A., &#38; Marques, F. (2022). Phase-locking flows between orthogonally stretching parallel plates. <i>Physics of Fluids</i>. AIP Publishing. <a href=\"https://doi.org/10.1063/5.0124152\">https://doi.org/10.1063/5.0124152</a>","short":"B. Wang, R. Ayats López, A. Meseguer, F. Marques, Physics of Fluids 34 (2022).","ieee":"B. Wang, R. Ayats López, A. Meseguer, and F. Marques, “Phase-locking flows between orthogonally stretching parallel plates,” <i>Physics of Fluids</i>, vol. 34, no. 11. AIP Publishing, 2022.","mla":"Wang, B., et al. “Phase-Locking Flows between Orthogonally Stretching Parallel Plates.” <i>Physics of Fluids</i>, vol. 34, no. 11, 114111, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0124152\">10.1063/5.0124152</a>.","chicago":"Wang, B., Roger Ayats López, A. Meseguer, and F. Marques. “Phase-Locking Flows between Orthogonally Stretching Parallel Plates.” <i>Physics of Fluids</i>. AIP Publishing, 2022. <a href=\"https://doi.org/10.1063/5.0124152\">https://doi.org/10.1063/5.0124152</a>.","ama":"Wang B, Ayats López R, Meseguer A, Marques F. Phase-locking flows between orthogonally stretching parallel plates. <i>Physics of Fluids</i>. 2022;34(11). doi:<a href=\"https://doi.org/10.1063/5.0124152\">10.1063/5.0124152</a>","ista":"Wang B, Ayats López R, Meseguer A, Marques F. 2022. Phase-locking flows between orthogonally stretching parallel plates. Physics of Fluids. 34(11), 114111."},"external_id":{"isi":["000880665300024"]},"month":"11","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1063/5.0124152","author":[{"first_name":"B.","last_name":"Wang","full_name":"Wang, B."},{"first_name":"Roger","orcid":"0000-0001-6572-0621","full_name":"Ayats López, Roger","id":"ab77522d-073b-11ed-8aff-e71b39258362","last_name":"Ayats López"},{"first_name":"A.","last_name":"Meseguer","full_name":"Meseguer, A."},{"first_name":"F.","full_name":"Marques, F.","last_name":"Marques"}]},{"year":"2022","date_updated":"2025-06-11T13:41:34Z","publisher":"AIP Publishing","publication":"Chaos: An Interdisciplinary Journal of Nonlinear Science","title":"Crises and chaotic scattering in hydrodynamic pilot-wave experiments","publication_identifier":{"eissn":["1089-7682"],"issn":["1054-1500"]},"external_id":{"isi":["000861009600005"],"arxiv":["2206.01531"],"pmid":["36182399"]},"citation":{"chicago":"Choueiri, George H, Balachandra Suri, Jack Merrin, Maksym Serbyn, Björn Hof, and Nazmi B Budanur. “Crises and Chaotic Scattering in Hydrodynamic Pilot-Wave Experiments.” <i>Chaos: An Interdisciplinary Journal of Nonlinear Science</i>. AIP Publishing, 2022. <a href=\"https://doi.org/10.1063/5.0102904\">https://doi.org/10.1063/5.0102904</a>.","ama":"Choueiri GH, Suri B, Merrin J, Serbyn M, Hof B, Budanur NB. Crises and chaotic scattering in hydrodynamic pilot-wave experiments. <i>Chaos: An Interdisciplinary Journal of Nonlinear Science</i>. 2022;32(9). doi:<a href=\"https://doi.org/10.1063/5.0102904\">10.1063/5.0102904</a>","ista":"Choueiri GH, Suri B, Merrin J, Serbyn M, Hof B, Budanur NB. 2022. Crises and chaotic scattering in hydrodynamic pilot-wave experiments. Chaos: An Interdisciplinary Journal of Nonlinear Science. 32(9), 093138.","short":"G.H. Choueiri, B. Suri, J. Merrin, M. Serbyn, B. Hof, N.B. Budanur, Chaos: An Interdisciplinary Journal of Nonlinear Science 32 (2022).","apa":"Choueiri, G. H., Suri, B., Merrin, J., Serbyn, M., Hof, B., &#38; Budanur, N. B. (2022). Crises and chaotic scattering in hydrodynamic pilot-wave experiments. <i>Chaos: An Interdisciplinary Journal of Nonlinear Science</i>. AIP Publishing. <a href=\"https://doi.org/10.1063/5.0102904\">https://doi.org/10.1063/5.0102904</a>","ieee":"G. H. Choueiri, B. Suri, J. Merrin, M. Serbyn, B. Hof, and N. B. Budanur, “Crises and chaotic scattering in hydrodynamic pilot-wave experiments,” <i>Chaos: An Interdisciplinary Journal of Nonlinear Science</i>, vol. 32, no. 9. AIP Publishing, 2022.","mla":"Choueiri, George H., et al. “Crises and Chaotic Scattering in Hydrodynamic Pilot-Wave Experiments.” <i>Chaos: An Interdisciplinary Journal of Nonlinear Science</i>, vol. 32, no. 9, 093138, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0102904\">10.1063/5.0102904</a>."},"month":"09","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1063/5.0102904","author":[{"first_name":"George H","id":"448BD5BC-F248-11E8-B48F-1D18A9856A87","full_name":"Choueiri, George H","last_name":"Choueiri"},{"first_name":"Balachandra","last_name":"Suri","full_name":"Suri, Balachandra","id":"47A5E706-F248-11E8-B48F-1D18A9856A87"},{"id":"4515C308-F248-11E8-B48F-1D18A9856A87","full_name":"Merrin, Jack","last_name":"Merrin","orcid":"0000-0001-5145-4609","first_name":"Jack"},{"id":"47809E7E-F248-11E8-B48F-1D18A9856A87","full_name":"Serbyn, Maksym","last_name":"Serbyn","first_name":"Maksym","orcid":"0000-0002-2399-5827"},{"first_name":"Björn","orcid":"0000-0003-2057-2754","full_name":"Hof, Björn","id":"3A374330-F248-11E8-B48F-1D18A9856A87","last_name":"Hof"},{"first_name":"Nazmi B","orcid":"0000-0003-0423-5010","id":"3EA1010E-F248-11E8-B48F-1D18A9856A87","full_name":"Budanur, Nazmi B","last_name":"Budanur"}],"keyword":["Applied Mathematics","General Physics and Astronomy","Mathematical Physics","Statistical and Nonlinear Physics"],"publication_status":"published","file":[{"success":1,"file_name":"2022_Chaos_Choueiri.pdf","file_id":"12445","date_updated":"2023-01-30T09:41:12Z","access_level":"open_access","date_created":"2023-01-30T09:41:12Z","relation":"main_file","file_size":3209644,"content_type":"application/pdf","creator":"dernst","checksum":"17881eff8b21969359a2dd64620120ba"}],"issue":"9","day":"26","_id":"12259","oa":1,"date_created":"2023-01-16T09:58:16Z","ddc":["530"],"pmid":1,"acknowledgement":"This work was partially funded by the Institute of Science and Technology Austria Interdisciplinary Project Committee Grant “Pilot-Wave Hydrodynamics: Chaos and Quantum Analogies.”","date_published":"2022-09-26T00:00:00Z","arxiv":1,"article_number":"093138","has_accepted_license":"1","scopus_import":"1","department":[{"_id":"MaSe"},{"_id":"BjHo"},{"_id":"NanoFab"}],"isi":1,"type":"journal_article","status":"public","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"volume":32,"intvolume":"        32","article_processing_charge":"No","article_type":"original","quality_controlled":"1","file_date_updated":"2023-01-30T09:41:12Z","abstract":[{"text":"Theoretical foundations of chaos have been predominantly laid out for finite-dimensional dynamical systems, such as the three-body problem in classical mechanics and the Lorenz model in dissipative systems. In contrast, many real-world chaotic phenomena, e.g., weather, arise in systems with many (formally infinite) degrees of freedom, which limits direct quantitative analysis of such systems using chaos theory. In the present work, we demonstrate that the hydrodynamic pilot-wave systems offer a bridge between low- and high-dimensional chaotic phenomena by allowing for a systematic study of how the former connects to the latter. Specifically, we present experimental results, which show the formation of low-dimensional chaotic attractors upon destabilization of regular dynamics and a final transition to high-dimensional chaos via the merging of distinct chaotic regions through a crisis bifurcation. Moreover, we show that the post-crisis dynamics of the system can be rationalized as consecutive scatterings from the nonattracting chaotic sets with lifetimes following exponential distributions. ","lang":"eng"}],"oa_version":"Published Version","language":[{"iso":"eng"}]},{"oa_version":"Preprint","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2205.12871","open_access":"1"}],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"We report frictional drag reduction and a complete flow relaminarization of elastic turbulence (ET) at vanishing inertia in a viscoelastic channel flow past an obstacle. We show that the intensity of the observed elastic waves and wall-normal vorticity correlate well with the measured drag above the onset of ET. Moreover, we find that the elastic wave frequency grows with the Weissenberg number, and at sufficiently high frequency it causes a decay of the elastic waves, resulting in ET attenuation and drag reduction. Thus, this allows us to substantiate a physical mechanism, involving the interaction of elastic waves with wall-normal vorticity fluctuations, leading to the drag reduction and relaminarization phenomena at low Reynolds number."}],"article_type":"original","quality_controlled":"1","article_processing_charge":"No","volume":7,"intvolume":"         7","type":"journal_article","status":"public","department":[{"_id":"BjHo"}],"isi":1,"scopus_import":"1","acknowledgement":"We thank G. Falkovich for discussion and Guy Han for technical support. We are grateful to N. Jha for his help in µPIV measurements. This work is partially supported by the grants from\r\nIsrael Science Foundation (ISF; grant #882/15 and grant #784/19) and Binational USA-Israel Foundation (BSF;grant #2016145). ","date_published":"2022-08-03T00:00:00Z","arxiv":1,"article_number":"L081301","date_created":"2023-01-16T10:02:40Z","oa":1,"day":"03","_id":"12279","issue":"8","publication_status":"published","keyword":["Fluid Flow and Transfer Processes","Modeling and Simulation","Computational Mechanics"],"month":"08","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","author":[{"last_name":"Kumar","full_name":"Kumar, M. Vijay","first_name":"M. Vijay"},{"full_name":"Varshney, Atul","id":"2A2006B2-F248-11E8-B48F-1D18A9856A87","last_name":"Varshney","first_name":"Atul","orcid":"0000-0002-3072-5999"},{"first_name":"Dongyang","last_name":"Li","full_name":"Li, Dongyang"},{"first_name":"Victor","full_name":"Steinberg, Victor","last_name":"Steinberg"}],"doi":"10.1103/physrevfluids.7.l081301","citation":{"ieee":"M. V. Kumar, A. Varshney, D. Li, and V. Steinberg, “Relaminarization of elastic turbulence,” <i>Physical Review Fluids</i>, vol. 7, no. 8. American Physical Society, 2022.","mla":"Kumar, M. Vijay, et al. “Relaminarization of Elastic Turbulence.” <i>Physical Review Fluids</i>, vol. 7, no. 8, L081301, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/physrevfluids.7.l081301\">10.1103/physrevfluids.7.l081301</a>.","short":"M.V. Kumar, A. Varshney, D. Li, V. Steinberg, Physical Review Fluids 7 (2022).","apa":"Kumar, M. V., Varshney, A., Li, D., &#38; Steinberg, V. (2022). Relaminarization of elastic turbulence. <i>Physical Review Fluids</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevfluids.7.l081301\">https://doi.org/10.1103/physrevfluids.7.l081301</a>","ista":"Kumar MV, Varshney A, Li D, Steinberg V. 2022. Relaminarization of elastic turbulence. Physical Review Fluids. 7(8), L081301.","chicago":"Kumar, M. Vijay, Atul Varshney, Dongyang Li, and Victor Steinberg. “Relaminarization of Elastic Turbulence.” <i>Physical Review Fluids</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/physrevfluids.7.l081301\">https://doi.org/10.1103/physrevfluids.7.l081301</a>.","ama":"Kumar MV, Varshney A, Li D, Steinberg V. Relaminarization of elastic turbulence. <i>Physical Review Fluids</i>. 2022;7(8). doi:<a href=\"https://doi.org/10.1103/physrevfluids.7.l081301\">10.1103/physrevfluids.7.l081301</a>"},"external_id":{"isi":["000836397000001"],"arxiv":["2205.12871"]},"title":"Relaminarization of elastic turbulence","publication_identifier":{"issn":["2469-990X"]},"publication":"Physical Review Fluids","corr_author":"1","year":"2022","publisher":"American Physical Society","date_updated":"2024-10-09T21:03:55Z"},{"acknowledgement":"We thank T.Menner, T.Asenov, P. Maier and the Miba machine shop of IST Austria for their valuable support in all technical aspects. We thank Marc Avila for comments on the manuscript. This work was supported by a grant from the Simons Foundation (662960, B.H.). We acknowledge the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement 306589 for financial support. K.A.\r\nacknowledges funding from the Central Research Development Fund of the University of Bremen, grant number ZF04B /2019/FB04 Avila Kerstin (”Independent Project for Postdocs”). L.K. was supported by the European Union’s Horizon 2020 Research and innovation programme under the Marie Sklodowska-Curie grant agreement  No. 754411.\r\n","arxiv":1,"article_number":"014502","date_published":"2022-01-05T00:00:00Z","scopus_import":"1","isi":1,"department":[{"_id":"BjHo"}],"project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411"},{"call_identifier":"FP7","_id":"25152F3A-B435-11E9-9278-68D0E5697425","grant_number":"306589","name":"Decoding the complexity of turbulence at its origin"},{"_id":"238598C6-32DE-11EA-91FC-C7463DDC885E","grant_number":"662960","name":"Revisiting the Turbulence Problem Using Statistical Mechanics"}],"pmid":1,"article_processing_charge":"No","article_type":"original","quality_controlled":"1","abstract":[{"lang":"eng","text":"Directed percolation (DP) has recently emerged as a possible solution to the century old puzzle surrounding the transition to turbulence. Multiple model studies reported DP exponents, however, experimental evidence is limited since the largest possible observation times are orders of magnitude shorter than the flows’ characteristic timescales. An exception is cylindrical Couette flow where the limit is not temporal, but rather the realizable system size. We present experiments in a Couette setup of unprecedented azimuthal and axial aspect ratios. Approaching the critical point to within less than 0.1% we determine five critical exponents, all of which are in excellent agreement with the 2+1D DP universality class. The complex dynamics encountered at \r\nthe onset of turbulence can hence be fully rationalized within the framework of statistical mechanics."}],"oa_version":"Preprint","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2111.14894"}],"language":[{"iso":"eng"}],"status":"public","type":"journal_article","intvolume":"       128","volume":128,"external_id":{"pmid":["35061458"],"arxiv":["2111.14894"],"isi":["000748271700010"]},"citation":{"ama":"Klotz L, Lemoult GM, Avila K, Hof B. Phase transition to turbulence in spatially extended shear flows. <i>Physical Review Letters</i>. 2022;128(1). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.128.014502\">10.1103/PhysRevLett.128.014502</a>","chicago":"Klotz, Lukasz, Grégoire M Lemoult, Kerstin Avila, and Björn Hof. “Phase Transition to Turbulence in Spatially Extended Shear Flows.” <i>Physical Review Letters</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevLett.128.014502\">https://doi.org/10.1103/PhysRevLett.128.014502</a>.","ista":"Klotz L, Lemoult GM, Avila K, Hof B. 2022. Phase transition to turbulence in spatially extended shear flows. Physical Review Letters. 128(1), 014502.","apa":"Klotz, L., Lemoult, G. M., Avila, K., &#38; Hof, B. (2022). Phase transition to turbulence in spatially extended shear flows. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.128.014502\">https://doi.org/10.1103/PhysRevLett.128.014502</a>","short":"L. Klotz, G.M. Lemoult, K. Avila, B. Hof, Physical Review Letters 128 (2022).","mla":"Klotz, Lukasz, et al. “Phase Transition to Turbulence in Spatially Extended Shear Flows.” <i>Physical Review Letters</i>, vol. 128, no. 1, 014502, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.128.014502\">10.1103/PhysRevLett.128.014502</a>.","ieee":"L. Klotz, G. M. Lemoult, K. Avila, and B. Hof, “Phase transition to turbulence in spatially extended shear flows,” <i>Physical Review Letters</i>, vol. 128, no. 1. American Physical Society, 2022."},"month":"01","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","doi":"10.1103/PhysRevLett.128.014502","author":[{"first_name":"Lukasz","orcid":"0000-0003-1740-7635","id":"2C9AF1C2-F248-11E8-B48F-1D18A9856A87","full_name":"Klotz, Lukasz","last_name":"Klotz"},{"full_name":"Lemoult, Grégoire M","id":"4787FE80-F248-11E8-B48F-1D18A9856A87","last_name":"Lemoult","first_name":"Grégoire M"},{"first_name":"Kerstin","full_name":"Avila, Kerstin","last_name":"Avila"},{"last_name":"Hof","id":"3A374330-F248-11E8-B48F-1D18A9856A87","full_name":"Hof, Björn","orcid":"0000-0003-2057-2754","first_name":"Björn"}],"year":"2022","corr_author":"1","publisher":"American Physical Society","date_updated":"2024-10-22T11:08:41Z","publication":"Physical Review Letters","title":"Phase transition to turbulence in spatially extended shear flows","acknowledged_ssus":[{"_id":"M-Shop"}],"publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"day":"05","_id":"10654","ec_funded":1,"oa":1,"date_created":"2022-01-23T23:01:28Z","publication_status":"published","issue":"1"},{"conference":{"end_date":"2019-09-06","start_date":"2019-09-02","name":"IUTAM Symposium","location":"London, United Kingdom"},"OA_type":"closed access","_id":"10820","day":"01","date_created":"2022-03-04T09:14:34Z","publication_status":"published","citation":{"short":"J. Liu, E. Marensi, X. Wu, in:, IUTAM Laminar-Turbulent Transition, Springer Nature, 2022, pp. 587–598.","apa":"Liu, J., Marensi, E., &#38; Wu, X. (2022). Effects of streaky structures on the instability of supersonic boundary layers. In <i>IUTAM Laminar-Turbulent Transition</i> (Vol. 38, pp. 587–598). London, United Kingdom: Springer Nature. <a href=\"https://doi.org/10.1007/978-3-030-67902-6_51\">https://doi.org/10.1007/978-3-030-67902-6_51</a>","ieee":"J. Liu, E. Marensi, and X. Wu, “Effects of streaky structures on the instability of supersonic boundary layers,” in <i>IUTAM Laminar-Turbulent Transition</i>, London, United Kingdom, 2022, vol. 38, pp. 587–598.","mla":"Liu, Jianxin, et al. “Effects of Streaky Structures on the Instability of Supersonic Boundary Layers.” <i>IUTAM Laminar-Turbulent Transition</i>, vol. 38, Springer Nature, 2022, pp. 587–98, doi:<a href=\"https://doi.org/10.1007/978-3-030-67902-6_51\">10.1007/978-3-030-67902-6_51</a>.","chicago":"Liu, Jianxin, Elena Marensi, and Xuesong Wu. “Effects of Streaky Structures on the Instability of Supersonic Boundary Layers.” In <i>IUTAM Laminar-Turbulent Transition</i>, 38:587–98. Springer Nature, 2022. <a href=\"https://doi.org/10.1007/978-3-030-67902-6_51\">https://doi.org/10.1007/978-3-030-67902-6_51</a>.","ama":"Liu J, Marensi E, Wu X. Effects of streaky structures on the instability of supersonic boundary layers. In: <i>IUTAM Laminar-Turbulent Transition</i>. Vol 38. Springer Nature; 2022:587-598. doi:<a href=\"https://doi.org/10.1007/978-3-030-67902-6_51\">10.1007/978-3-030-67902-6_51</a>","ista":"Liu J, Marensi E, Wu X. 2022. Effects of streaky structures on the instability of supersonic boundary layers. IUTAM Laminar-Turbulent Transition. IUTAM Symposium, IUTAM, vol. 38, 587–598."},"external_id":{"isi":["000709087600051"]},"doi":"10.1007/978-3-030-67902-6_51","author":[{"first_name":"Jianxin","full_name":"Liu, Jianxin","last_name":"Liu"},{"id":"0BE7553A-1004-11EA-B805-18983DDC885E","full_name":"Marensi, Elena","last_name":"Marensi","first_name":"Elena","orcid":"0000-0001-7173-4923"},{"first_name":"Xuesong","last_name":"Wu","full_name":"Wu, Xuesong"}],"month":"01","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication":"IUTAM Laminar-Turbulent Transition","publisher":"Springer Nature","date_updated":"2025-05-20T06:08:26Z","year":"2022","publication_identifier":{"issn":["1875-3507"],"isbn":["9783030679019"],"eissn":["1875-3493"],"eisbn":["9783030679026"]},"title":"Effects of streaky structures on the instability of supersonic boundary layers","quality_controlled":"1","article_processing_charge":"No","page":"587-598","language":[{"iso":"eng"}],"oa_version":"None","abstract":[{"text":"Streaky structures in the boundary layers are often generated by surface roughness elements and/or free-stream turbulence, and are known to have significant effects on boundary-layer instability. In this paper, we investigate the impact of two forms of streaks on the instability of supersonic boundary layers. The first concerns the streaks generated by an array of spanwise periodic and streamwise elongated surface roughness elements, and our interest is how these streaks influence the lower-branch viscous first modes, whose characteristic wavelength and frequency are on the classical triple-deck scales. By adapting the triple-deck theory in the incompressible regime to the supersonic one, we first derived a simplified system which allows for efficient calculation of the streaks. The asymptotic analysis simplifies a bi-global eigenvalue problem to a one-dimensional problem in the spanwise direction, showing that the instability is controlled at leading order solely by the spanwise-dependent wall shear. In the fundamental configuration, the streaks stabilize first modes at low frequencies but destabilize the high-frequency ones. In the subharmonic configuration, the streaks generally destabilize the first mode across the entire frequency band. Importantly, the spanwise even modes are of radiating nature, i.e. they emit acoustic waves spontaneously to the far field. Streaks of the second form are generated by low-frequency vortical disturbances representing free-stream turbulence. They alter the flow in the entire layer and their effects on instability are investigated by solving the inviscid bi-global eigenvalue problem. Different from the incompressible case, a multitude of compressible instability modes exists, of which the dominant mode is an inviscid instability associated with the spanwise shear. In addition, there exists a separate branch of instability modes that have smaller growth rates but are spontaneously radiating.","lang":"eng"}],"status":"public","type":"conference","intvolume":"        38","volume":38,"alternative_title":["IUTAM"],"date_published":"2022-01-01T00:00:00Z","acknowledgement":"The work is supported by the National Key Research and Development Program of China (No. 2016YFA0401200), the National Natural Science Foundation of China (Grant Nos. 91952202 and 11402167).","isi":1,"department":[{"_id":"BjHo"}],"scopus_import":"1"},{"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"intvolume":"         1","related_material":{"record":[{"status":"public","id":"12726","relation":"dissertation_contains"},{"status":"public","id":"14530","relation":"dissertation_contains"}]},"volume":1,"status":"public","type":"journal_article","language":[{"iso":"eng"}],"oa_version":"Published Version","file_date_updated":"2023-08-16T08:00:30Z","abstract":[{"text":"The mammalian neocortex is composed of diverse neuronal and glial cell classes that broadly arrange in six distinct laminae. Cortical layers emerge during development and defects in the developmental programs that orchestrate cortical lamination are associated with neurodevelopmental diseases. The developmental principle of cortical layer formation depends on concerted radial projection neuron migration, from their birthplace to their final target position. Radial migration occurs in defined sequential steps, regulated by a large array of signaling pathways. However, based on genetic loss-of-function experiments, most studies have thus far focused on the role of cell-autonomous gene function. Yet, cortical neuron migration in situ is a complex process and migrating neurons traverse along diverse cellular compartments and environments. The role of tissue-wide properties and genetic state in radial neuron migration is however not clear. Here we utilized mosaic analysis with double markers (MADM) technology to either sparsely or globally delete gene function, followed by quantitative single-cell phenotyping. The MADM-based gene ablation paradigms in combination with computational modeling demonstrated that global tissue-wide effects predominate cell-autonomous gene function albeit in a gene-specific manner. Our results thus suggest that the genetic landscape in a tissue critically affects the overall migration phenotype of individual cortical projection neurons. In a broader context, our findings imply that global tissue-wide effects represent an essential component of the underlying etiology associated with focal malformations of cortical development in particular, and neurological diseases in general.","lang":"eng"}],"quality_controlled":"1","article_type":"original","article_processing_charge":"No","pmid":1,"project":[{"name":"Molecular Mechanisms of Cerebral Cortex Development","grant_number":"618444","_id":"25D61E48-B435-11E9-9278-68D0E5697425","call_identifier":"FP7"},{"_id":"2625A13E-B435-11E9-9278-68D0E5697425","name":"Molecular mechanisms of radial neuronal migration","grant_number":"24812"}],"department":[{"_id":"SiHi"},{"_id":"BjHo"},{"_id":"LifeSc"},{"_id":"EM-Fac"}],"has_accepted_license":"1","article_number":"kvac009","date_published":"2022-07-07T00:00:00Z","acknowledgement":"A.H.H. was a recipient of a DOC Fellowship (24812) of the Austrian Academy of Sciences. This work also received support from IST Austria institutional funds; the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007–2013) under REA grant agreement No 618444 to S.H.\r\nAPC funding was obtained by IST Austria institutional funds.\r\nWe thank A. Sommer and C. Czepe (VBCF GmbH, NGS Unit), L. Andersen, J. Sonntag and J. Renno for technical support and/or initial experiments; M. Sixt, J. Nimpf and all members of the Hippenmeyer lab for discussion. This research was supported by the Scientific Service Units of IST Austria through resources provided by the Imaging and Optics Facility, Lab Support Facility and Preclinical Facility.","issue":"1","file":[{"date_created":"2023-08-16T08:00:30Z","access_level":"open_access","file_size":4846551,"relation":"main_file","checksum":"822e76e056c07099d1fb27d1ece5941b","creator":"dernst","content_type":"application/pdf","success":1,"file_name":"2023_OxfordOpenNeuroscience_Hansen.pdf","file_id":"14061","date_updated":"2023-08-16T08:00:30Z"}],"publication_status":"published","ddc":["570"],"date_created":"2022-02-25T07:52:11Z","oa":1,"ec_funded":1,"_id":"10791","day":"07","publication_identifier":{"eissn":["2753-149X"]},"title":"Tissue-wide effects override cell-intrinsic gene function in radial neuron migration","acknowledged_ssus":[{"_id":"LifeSc"},{"_id":"PreCl"},{"_id":"Bio"}],"publication":"Oxford Open Neuroscience","date_updated":"2026-04-07T13:29:13Z","publisher":"Oxford University Press","year":"2022","corr_author":"1","author":[{"first_name":"Andi H","id":"38853E16-F248-11E8-B48F-1D18A9856A87","full_name":"Hansen, Andi H","last_name":"Hansen"},{"last_name":"Pauler","id":"48EA0138-F248-11E8-B48F-1D18A9856A87","full_name":"Pauler, Florian","orcid":"0000-0002-7462-0048","first_name":"Florian"},{"id":"3BE60946-F248-11E8-B48F-1D18A9856A87","full_name":"Riedl, Michael","last_name":"Riedl","first_name":"Michael","orcid":"0000-0003-4844-6311"},{"last_name":"Streicher","id":"36BCB99C-F248-11E8-B48F-1D18A9856A87","full_name":"Streicher, Carmen","first_name":"Carmen"},{"first_name":"Anna-Magdalena","last_name":"Heger","id":"4B76FFD2-F248-11E8-B48F-1D18A9856A87","full_name":"Heger, Anna-Magdalena"},{"full_name":"Laukoter, Susanne","id":"2D6B7A9A-F248-11E8-B48F-1D18A9856A87","last_name":"Laukoter","first_name":"Susanne","orcid":"0000-0002-7903-3010"},{"first_name":"Christoph M","orcid":"0000-0003-1216-9105","last_name":"Sommer","id":"4DF26D8C-F248-11E8-B48F-1D18A9856A87","full_name":"Sommer, Christoph M"},{"last_name":"Nicolas","full_name":"Nicolas, Armel","id":"2A103192-F248-11E8-B48F-1D18A9856A87","first_name":"Armel"},{"last_name":"Hof","full_name":"Hof, Björn","id":"3A374330-F248-11E8-B48F-1D18A9856A87","first_name":"Björn","orcid":"0000-0003-2057-2754"},{"first_name":"Li Huei","last_name":"Tsai","full_name":"Tsai, Li Huei"},{"full_name":"Rülicke, Thomas","last_name":"Rülicke","first_name":"Thomas"},{"id":"37B36620-F248-11E8-B48F-1D18A9856A87","full_name":"Hippenmeyer, Simon","last_name":"Hippenmeyer","first_name":"Simon","orcid":"0000-0003-2279-1061"}],"doi":"10.1093/oons/kvac009","month":"07","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"pmid":["38596707"]},"citation":{"ista":"Hansen AH, Pauler F, Riedl M, Streicher C, Heger A-M, Laukoter S, Sommer CM, Nicolas A, Hof B, Tsai LH, Rülicke T, Hippenmeyer S. 2022. Tissue-wide effects override cell-intrinsic gene function in radial neuron migration. Oxford Open Neuroscience. 1(1), kvac009.","chicago":"Hansen, Andi H, Florian Pauler, Michael Riedl, Carmen Streicher, Anna-Magdalena Heger, Susanne Laukoter, Christoph M Sommer, et al. “Tissue-Wide Effects Override Cell-Intrinsic Gene Function in Radial Neuron Migration.” <i>Oxford Open Neuroscience</i>. Oxford University Press, 2022. <a href=\"https://doi.org/10.1093/oons/kvac009\">https://doi.org/10.1093/oons/kvac009</a>.","ama":"Hansen AH, Pauler F, Riedl M, et al. Tissue-wide effects override cell-intrinsic gene function in radial neuron migration. <i>Oxford Open Neuroscience</i>. 2022;1(1). doi:<a href=\"https://doi.org/10.1093/oons/kvac009\">10.1093/oons/kvac009</a>","ieee":"A. H. Hansen <i>et al.</i>, “Tissue-wide effects override cell-intrinsic gene function in radial neuron migration,” <i>Oxford Open Neuroscience</i>, vol. 1, no. 1. Oxford University Press, 2022.","mla":"Hansen, Andi H., et al. “Tissue-Wide Effects Override Cell-Intrinsic Gene Function in Radial Neuron Migration.” <i>Oxford Open Neuroscience</i>, vol. 1, no. 1, kvac009, Oxford University Press, 2022, doi:<a href=\"https://doi.org/10.1093/oons/kvac009\">10.1093/oons/kvac009</a>.","short":"A.H. Hansen, F. Pauler, M. Riedl, C. Streicher, A.-M. Heger, S. Laukoter, C.M. Sommer, A. Nicolas, B. Hof, L.H. Tsai, T. Rülicke, S. Hippenmeyer, Oxford Open Neuroscience 1 (2022).","apa":"Hansen, A. H., Pauler, F., Riedl, M., Streicher, C., Heger, A.-M., Laukoter, S., … Hippenmeyer, S. (2022). Tissue-wide effects override cell-intrinsic gene function in radial neuron migration. <i>Oxford Open Neuroscience</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/oons/kvac009\">https://doi.org/10.1093/oons/kvac009</a>"}},{"article_processing_charge":"No","quality_controlled":"1","article_type":"original","abstract":[{"text":"When crawling through the body, leukocytes often traverse tissues that are densely packed with extracellular matrix and other cells, and this raises the question: How do leukocytes overcome compressive mechanical loads? Here, we show that the actin cortex of leukocytes is mechanoresponsive and that this responsiveness requires neither force sensing via the nucleus nor adhesive interactions with a substrate. Upon global compression of the cell body as well as local indentation of the plasma membrane, Wiskott-Aldrich syndrome protein (WASp) assembles into dot-like structures, providing activation platforms for Arp2/3 nucleated actin patches. These patches locally push against the external load, which can be obstructing collagen fibers or other cells, and thereby create space to facilitate forward locomotion. We show in vitro and in vivo that this WASp function is rate limiting for ameboid leukocyte migration in dense but not in loose environments and is required for trafficking through diverse tissues such as skin and lymph nodes.","lang":"eng"}],"main_file_link":[{"url":"https://www.sciencedirect.com/science/article/pii/S1534580721009497","open_access":"1"}],"page":"47-62.e9","language":[{"iso":"eng"}],"oa_version":"Published Version","status":"public","type":"journal_article","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","short":"CC BY-NC-ND (4.0)","image":"/images/cc_by_nc_nd.png","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)"},"intvolume":"        57","volume":57,"related_material":{"record":[{"relation":"dissertation_contains","id":"20149","status":"public"},{"status":"public","relation":"dissertation_contains","id":"12726"},{"status":"public","id":"14530","relation":"dissertation_contains"},{"relation":"dissertation_contains","id":"12401","status":"public"}]},"date_published":"2022-01-10T00:00:00Z","acknowledgement":"We thank N. Darwish-Miranda, F. Leite, F.P. Assen, and A. Eichner for advice and help with experiments. We thank J. Renkawitz, E. Kiermaier, A. Juanes Garcia, and M. Avellaneda for critical reading of the manuscript. We thank M. Driscoll for advice on fluorescent labeling of collagen gels. This research was supported by the Scientific Service Units (SSUs) of IST Austria through resources provided by Molecular Biology Services/Lab Support Facility (LSF)/Bioimaging Facility/Electron Microscopy Facility. This work was funded by grants from the European Research Council ( CoG 724373 ) and the Austrian Science Foundation (FWF) to M.S. F.G. received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement no. 747687.","scopus_import":"1","department":[{"_id":"MiSi"},{"_id":"EM-Fac"},{"_id":"NanoFab"},{"_id":"BjHo"}],"isi":1,"project":[{"call_identifier":"H2020","_id":"260AA4E2-B435-11E9-9278-68D0E5697425","grant_number":"747687","name":"Mechanical Adaptation of Lamellipodial Actin Networks in Migrating Cells"},{"_id":"25FE9508-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Cellular Navigation Along Spatial Gradients","grant_number":"724373"}],"pmid":1,"_id":"10703","day":"10","ec_funded":1,"oa":1,"ddc":["570"],"date_created":"2022-01-30T23:01:33Z","publication_status":"published","issue":"1","external_id":{"pmid":["34919802"],"isi":["000768933800005"]},"citation":{"apa":"Gaertner, F., Dos Reis Rodrigues, P., de Vries, I., Hons, M., Aguilera, J., Riedl, M., … Sixt, M. K. (2022). WASp triggers mechanosensitive actin patches to facilitate immune cell migration in dense tissues. <i>Developmental Cell</i>. Cell Press. <a href=\"https://doi.org/10.1016/j.devcel.2021.11.024\">https://doi.org/10.1016/j.devcel.2021.11.024</a>","short":"F. Gaertner, P. Dos Reis Rodrigues, I. de Vries, M. Hons, J. Aguilera, M. Riedl, A.F. Leithner, S. Tasciyan, A. Kopf, J. Merrin, V. Zheden, W. Kaufmann, R. Hauschild, M.K. Sixt, Developmental Cell 57 (2022) 47–62.e9.","ieee":"F. Gaertner <i>et al.</i>, “WASp triggers mechanosensitive actin patches to facilitate immune cell migration in dense tissues,” <i>Developmental Cell</i>, vol. 57, no. 1. Cell Press, p. 47–62.e9, 2022.","mla":"Gaertner, Florian, et al. “WASp Triggers Mechanosensitive Actin Patches to Facilitate Immune Cell Migration in Dense Tissues.” <i>Developmental Cell</i>, vol. 57, no. 1, Cell Press, 2022, p. 47–62.e9, doi:<a href=\"https://doi.org/10.1016/j.devcel.2021.11.024\">10.1016/j.devcel.2021.11.024</a>.","chicago":"Gaertner, Florian, Patricia Dos Reis Rodrigues, Ingrid de Vries, Miroslav Hons, Juan Aguilera, Michael Riedl, Alexander F Leithner, et al. “WASp Triggers Mechanosensitive Actin Patches to Facilitate Immune Cell Migration in Dense Tissues.” <i>Developmental Cell</i>. Cell Press, 2022. <a href=\"https://doi.org/10.1016/j.devcel.2021.11.024\">https://doi.org/10.1016/j.devcel.2021.11.024</a>.","ama":"Gaertner F, Dos Reis Rodrigues P, de Vries I, et al. WASp triggers mechanosensitive actin patches to facilitate immune cell migration in dense tissues. <i>Developmental Cell</i>. 2022;57(1):47-62.e9. doi:<a href=\"https://doi.org/10.1016/j.devcel.2021.11.024\">10.1016/j.devcel.2021.11.024</a>","ista":"Gaertner F, Dos Reis Rodrigues P, de Vries I, Hons M, Aguilera J, Riedl M, Leithner AF, Tasciyan S, Kopf A, Merrin J, Zheden V, Kaufmann W, Hauschild R, Sixt MK. 2022. WASp triggers mechanosensitive actin patches to facilitate immune cell migration in dense tissues. Developmental Cell. 57(1), 47–62.e9."},"author":[{"first_name":"Florian","full_name":"Gaertner, Florian","last_name":"Gaertner"},{"first_name":"Patricia","orcid":"0000-0003-1681-508X","last_name":"Dos Reis Rodrigues","full_name":"Dos Reis Rodrigues, Patricia","id":"26E95904-5160-11E9-9C0B-C5B0DC97E90F"},{"first_name":"Ingrid","id":"4C7D837E-F248-11E8-B48F-1D18A9856A87","full_name":"De Vries, Ingrid","last_name":"De Vries"},{"orcid":"0000-0002-6625-3348","first_name":"Miroslav","id":"4167FE56-F248-11E8-B48F-1D18A9856A87","full_name":"Hons, Miroslav","last_name":"Hons"},{"full_name":"Aguilera, Juan","last_name":"Aguilera","first_name":"Juan"},{"orcid":"0000-0003-4844-6311","first_name":"Michael","full_name":"Riedl, Michael","id":"3BE60946-F248-11E8-B48F-1D18A9856A87","last_name":"Riedl"},{"last_name":"Leithner","id":"3B1B77E4-F248-11E8-B48F-1D18A9856A87","full_name":"Leithner, Alexander F","first_name":"Alexander F","orcid":"0000-0002-1073-744X"},{"id":"4323B49C-F248-11E8-B48F-1D18A9856A87","full_name":"Tasciyan, Saren","last_name":"Tasciyan","orcid":"0000-0003-1671-393X","first_name":"Saren"},{"full_name":"Kopf, Aglaja","id":"31DAC7B6-F248-11E8-B48F-1D18A9856A87","last_name":"Kopf","first_name":"Aglaja","orcid":"0000-0002-2187-6656"},{"full_name":"Merrin, Jack","id":"4515C308-F248-11E8-B48F-1D18A9856A87","last_name":"Merrin","first_name":"Jack","orcid":"0000-0001-5145-4609"},{"orcid":"0000-0002-9438-4783","first_name":"Vanessa","last_name":"Zheden","id":"39C5A68A-F248-11E8-B48F-1D18A9856A87","full_name":"Zheden, Vanessa"},{"id":"3F99E422-F248-11E8-B48F-1D18A9856A87","full_name":"Kaufmann, Walter","last_name":"Kaufmann","orcid":"0000-0001-9735-5315","first_name":"Walter"},{"last_name":"Hauschild","id":"4E01D6B4-F248-11E8-B48F-1D18A9856A87","full_name":"Hauschild, Robert","first_name":"Robert","orcid":"0000-0001-9843-3522"},{"last_name":"Sixt","id":"41E9FBEA-F248-11E8-B48F-1D18A9856A87","full_name":"Sixt, Michael K","orcid":"0000-0002-6620-9179","first_name":"Michael K"}],"doi":"10.1016/j.devcel.2021.11.024","month":"01","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","publisher":"Cell Press","date_updated":"2026-05-29T22:31:09Z","year":"2022","corr_author":"1","publication":"Developmental Cell","publication_identifier":{"eissn":["1878-1551"],"issn":["1534-5807"]},"title":"WASp triggers mechanosensitive actin patches to facilitate immune cell migration in dense tissues","acknowledged_ssus":[{"_id":"LifeSc"},{"_id":"Bio"},{"_id":"EM-Fac"}]},{"publication":"Nature Communications","year":"2021","date_updated":"2023-08-14T08:12:12Z","publisher":"Springer Nature","title":"Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas","publication_identifier":{"eissn":["2041-1723"]},"external_id":{"arxiv":["2103.16986"],"isi":["000708601800015"]},"citation":{"ama":"Sortino L, Zotev PG, Phillips CL, et al. Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. <i>Nature Communications</i>. 2021;12. doi:<a href=\"https://doi.org/10.1038/s41467-021-26262-3\">10.1038/s41467-021-26262-3</a>","chicago":"Sortino, Luca, Panaiot G. Zotev, Catherine L. Phillips, Alistair J. Brash, Javier Cambiasso, Elena Marensi, A. Mark Fox, Stefan A. Maier, Riccardo Sapienza, and Alexander I. Tartakovskii. “Bright Single Photon Emitters with Enhanced Quantum Efficiency in a Two-Dimensional Semiconductor Coupled with Dielectric Nano-Antennas.” <i>Nature Communications</i>. Springer Nature, 2021. <a href=\"https://doi.org/10.1038/s41467-021-26262-3\">https://doi.org/10.1038/s41467-021-26262-3</a>.","ista":"Sortino L, Zotev PG, Phillips CL, Brash AJ, Cambiasso J, Marensi E, Fox AM, Maier SA, Sapienza R, Tartakovskii AI. 2021. Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. Nature Communications. 12, 6063.","short":"L. Sortino, P.G. Zotev, C.L. Phillips, A.J. Brash, J. Cambiasso, E. Marensi, A.M. Fox, S.A. Maier, R. Sapienza, A.I. Tartakovskii, Nature Communications 12 (2021).","apa":"Sortino, L., Zotev, P. G., Phillips, C. L., Brash, A. J., Cambiasso, J., Marensi, E., … Tartakovskii, A. I. (2021). Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-021-26262-3\">https://doi.org/10.1038/s41467-021-26262-3</a>","mla":"Sortino, Luca, et al. “Bright Single Photon Emitters with Enhanced Quantum Efficiency in a Two-Dimensional Semiconductor Coupled with Dielectric Nano-Antennas.” <i>Nature Communications</i>, vol. 12, 6063, Springer Nature, 2021, doi:<a href=\"https://doi.org/10.1038/s41467-021-26262-3\">10.1038/s41467-021-26262-3</a>.","ieee":"L. Sortino <i>et al.</i>, “Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas,” <i>Nature Communications</i>, vol. 12. Springer Nature, 2021."},"month":"10","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","doi":"10.1038/s41467-021-26262-3","author":[{"first_name":"Luca","full_name":"Sortino, Luca","last_name":"Sortino"},{"first_name":"Panaiot G.","full_name":"Zotev, Panaiot G.","last_name":"Zotev"},{"first_name":"Catherine L.","last_name":"Phillips","full_name":"Phillips, Catherine L."},{"first_name":"Alistair J.","last_name":"Brash","full_name":"Brash, Alistair J."},{"first_name":"Javier","full_name":"Cambiasso, Javier","last_name":"Cambiasso"},{"orcid":"0000-0001-7173-4923","first_name":"Elena","full_name":"Marensi, Elena","id":"0BE7553A-1004-11EA-B805-18983DDC885E","last_name":"Marensi"},{"first_name":"A. Mark","last_name":"Fox","full_name":"Fox, A. Mark"},{"first_name":"Stefan A.","full_name":"Maier, Stefan A.","last_name":"Maier"},{"full_name":"Sapienza, Riccardo","last_name":"Sapienza","first_name":"Riccardo"},{"first_name":"Alexander I.","full_name":"Tartakovskii, Alexander I.","last_name":"Tartakovskii"}],"file":[{"date_created":"2021-11-03T11:31:24Z","access_level":"open_access","file_size":1434201,"relation":"main_file","content_type":"application/pdf","checksum":"8580d128389860f732028c521cd5949e","creator":"cchlebak","success":1,"file_id":"10212","file_name":"2021_NatComm_Sortino.pdf","date_updated":"2021-11-03T11:31:24Z"}],"publication_status":"published","day":"18","_id":"10203","date_created":"2021-10-31T23:01:30Z","ddc":["530"],"oa":1,"has_accepted_license":"1","acknowledgement":"L.S., P.G.Z., and A.I.T. thank the financial support of the European Graphene Flagship Project under grant agreements 881603 and EPSRC grant EP/S030751/1. L.S. and A.I.T. thank the European Union’s Horizon 2020 research and innovation programme under ITN Spin-NANO Marie Sklodowska-Curie grant agreement no. 676108. P.G.Z. and A.I.T. thank the European Union’s Horizon 2020 research and innovation programme under ITN 4PHOTON Marie Sklodowska-Curie grant agreement no. 721394. J.C., S.A.M., and R.S. acknowledge funding by EPSRC (EP/P033369 and EP/M013812). C.L.P., A.J.B., A.I.T., and A.M.F. acknowledge funding by EPSRC Programme Grant EP/N031776/1. S.A.M. acknowledges the Lee-Lucas Chair in Physics, the Solar Energies go Hybrid (SolTech) programme, and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy - EXC 2089/1 - 390776260.","article_number":"6063","arxiv":1,"date_published":"2021-10-18T00:00:00Z","department":[{"_id":"BjHo"}],"isi":1,"scopus_import":"1","type":"journal_article","status":"public","intvolume":"        12","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"volume":12,"article_type":"original","quality_controlled":"1","article_processing_charge":"No","oa_version":"Published Version","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Single photon emitters in atomically-thin semiconductors can be deterministically positioned using strain induced by underlying nano-structures. Here, we couple monolayer WSe2 to high-refractive-index gallium phosphide dielectric nano-antennas providing both optical enhancement and monolayer deformation. For single photon emitters formed on such nano-antennas, we find very low (femto-Joule) saturation pulse energies and up to 104 times brighter photoluminescence than in WSe2 placed on low-refractive-index SiO2 pillars. We show that the key to these observations is the increase on average by a factor of 5 of the quantum efficiency of the emitters coupled to the nano-antennas. This further allows us to gain new insights into their photoluminescence dynamics, revealing the roles of the dark exciton reservoir and Auger processes. We also find that the coherence time of such emitters is limited by intrinsic dephasing processes. Our work establishes dielectric nano-antennas as a platform for high-efficiency quantum light generation in monolayer semiconductors."}],"file_date_updated":"2021-11-03T11:31:24Z"},{"pmid":1,"article_number":"58","date_published":"2021-01-01T00:00:00Z","acknowledgement":"This research was funded by the Central Research Development Fund of the University of\r\nBremen grant number ZF04B /2019/FB04 Avila_Kerstin (“Independent Project for Postdocs”). Shreyas Jalikop is acknowledged for recording some of the lifetime measurements\r\n","has_accepted_license":"1","scopus_import":"1","isi":1,"department":[{"_id":"BjHo"}],"status":"public","type":"journal_article","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"intvolume":"        23","volume":23,"article_processing_charge":"No","quality_controlled":"1","article_type":"original","abstract":[{"lang":"eng","text":"In many basic shear flows, such as pipe, Couette, and channel flow, turbulence does not\r\narise from an instability of the laminar state, and both dynamical states co-exist. With decreasing flow speed (i.e., decreasing Reynolds number) the fraction of fluid in laminar motion increases while turbulence recedes and eventually the entire flow relaminarizes. The first step towards understanding the nature of this transition is to determine if the phase change is of either first or second order. In the former case, the turbulent fraction would drop discontinuously to zero as the Reynolds number decreases while in the latter the process would be continuous. For Couette flow, the flow between two parallel plates, earlier studies suggest a discontinuous scenario. In the present study we realize a Couette flow between two concentric cylinders which allows studies to be carried out in large aspect ratios and for extensive observation times. The presented measurements show that the transition in this circular Couette geometry is continuous suggesting that former studies were limited by finite size effects. A further characterization of this transition, in particular its relation to the directed percolation universality class, requires even larger system sizes than presently available. "}],"file_date_updated":"2021-01-11T07:50:32Z","language":[{"iso":"eng"}],"oa_version":"Published Version","publisher":"MDPI","date_updated":"2023-08-07T13:31:07Z","year":"2021","publication":"Entropy","publication_identifier":{"eissn":["1099-4300"]},"title":"Second-order phase transition in counter-rotating taylor-couette flow experiment","external_id":{"pmid":["33396499"],"isi":["000610135400001"]},"citation":{"apa":"Avila, K., &#38; Hof, B. (2021). Second-order phase transition in counter-rotating taylor-couette flow experiment. <i>Entropy</i>. MDPI. <a href=\"https://doi.org/10.3390/e23010058\">https://doi.org/10.3390/e23010058</a>","short":"K. Avila, B. Hof, Entropy 23 (2021).","ieee":"K. Avila and B. Hof, “Second-order phase transition in counter-rotating taylor-couette flow experiment,” <i>Entropy</i>, vol. 23, no. 1. MDPI, 2021.","mla":"Avila, Kerstin, and Björn Hof. “Second-Order Phase Transition in Counter-Rotating Taylor-Couette Flow Experiment.” <i>Entropy</i>, vol. 23, no. 1, 58, MDPI, 2021, doi:<a href=\"https://doi.org/10.3390/e23010058\">10.3390/e23010058</a>.","chicago":"Avila, Kerstin, and Björn Hof. “Second-Order Phase Transition in Counter-Rotating Taylor-Couette Flow Experiment.” <i>Entropy</i>. MDPI, 2021. <a href=\"https://doi.org/10.3390/e23010058\">https://doi.org/10.3390/e23010058</a>.","ama":"Avila K, Hof B. Second-order phase transition in counter-rotating taylor-couette flow experiment. <i>Entropy</i>. 2021;23(1). doi:<a href=\"https://doi.org/10.3390/e23010058\">10.3390/e23010058</a>","ista":"Avila K, Hof B. 2021. Second-order phase transition in counter-rotating taylor-couette flow experiment. Entropy. 23(1), 58."},"author":[{"full_name":"Avila, Kerstin","id":"fcf74381-53e1-11eb-a6dc-b0e2acf78757","last_name":"Avila","first_name":"Kerstin"},{"orcid":"0000-0003-2057-2754","first_name":"Björn","last_name":"Hof","id":"3A374330-F248-11E8-B48F-1D18A9856A87","full_name":"Hof, Björn"}],"doi":"10.3390/e23010058","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","month":"01","publication_status":"published","issue":"1","file":[{"date_updated":"2021-01-11T07:50:32Z","file_name":"2021_Entropy_Avila.pdf","file_id":"9003","success":1,"content_type":"application/pdf","creator":"dernst","checksum":"3ba3dd8b7eecff713b72c5e9ba30d626","date_created":"2021-01-11T07:50:32Z","access_level":"open_access","file_size":9456389,"relation":"main_file"}],"_id":"8999","day":"01","oa":1,"ddc":["530"],"date_created":"2021-01-10T23:01:17Z"},{"publication_identifier":{"eissn":["1469-7645"],"issn":["0022-1120"]},"title":"Experimental measurements in plane Couette-Poiseuille flow: Dynamics of the large- and small-scale flow","date_updated":"2025-04-14T07:43:51Z","publisher":"Cambridge University Press","year":"2021","publication":"Journal of Fluid Mechanics","doi":"10.1017/jfm.2020.1089","author":[{"id":"2C9AF1C2-F248-11E8-B48F-1D18A9856A87","full_name":"Klotz, Lukasz","last_name":"Klotz","first_name":"Lukasz","orcid":"0000-0003-1740-7635"},{"full_name":"Pavlenko, A. M.","last_name":"Pavlenko","first_name":"A. M."},{"first_name":"J. E.","full_name":"Wesfreid, J. E.","last_name":"Wesfreid"}],"month":"02","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"short":"L. Klotz, A.M. Pavlenko, J.E. Wesfreid, Journal of Fluid Mechanics 912 (2021).","apa":"Klotz, L., Pavlenko, A. M., &#38; Wesfreid, J. E. (2021). Experimental measurements in plane Couette-Poiseuille flow: Dynamics of the large- and small-scale flow. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2020.1089\">https://doi.org/10.1017/jfm.2020.1089</a>","mla":"Klotz, Lukasz, et al. “Experimental Measurements in Plane Couette-Poiseuille Flow: Dynamics of the Large- and Small-Scale Flow.” <i>Journal of Fluid Mechanics</i>, vol. 912, A24, Cambridge University Press, 2021, doi:<a href=\"https://doi.org/10.1017/jfm.2020.1089\">10.1017/jfm.2020.1089</a>.","ieee":"L. Klotz, A. M. Pavlenko, and J. E. Wesfreid, “Experimental measurements in plane Couette-Poiseuille flow: Dynamics of the large- and small-scale flow,” <i>Journal of Fluid Mechanics</i>, vol. 912. Cambridge University Press, 2021.","ama":"Klotz L, Pavlenko AM, Wesfreid JE. Experimental measurements in plane Couette-Poiseuille flow: Dynamics of the large- and small-scale flow. <i>Journal of Fluid Mechanics</i>. 2021;912. doi:<a href=\"https://doi.org/10.1017/jfm.2020.1089\">10.1017/jfm.2020.1089</a>","chicago":"Klotz, Lukasz, A. M. Pavlenko, and J. E. Wesfreid. “Experimental Measurements in Plane Couette-Poiseuille Flow: Dynamics of the Large- and Small-Scale Flow.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2021. <a href=\"https://doi.org/10.1017/jfm.2020.1089\">https://doi.org/10.1017/jfm.2020.1089</a>.","ista":"Klotz L, Pavlenko AM, Wesfreid JE. 2021. Experimental measurements in plane Couette-Poiseuille flow: Dynamics of the large- and small-scale flow. Journal of Fluid Mechanics. 912, A24."},"external_id":{"isi":["000618034400001"]},"publication_status":"published","file":[{"file_id":"9220","file_name":"2021_JourFluidMechanics_Klotz.pdf","success":1,"date_updated":"2021-03-03T09:49:34Z","creator":"dernst","content_type":"application/pdf","checksum":"b8020d6338667673e34fde0608913dd2","access_level":"open_access","date_created":"2021-03-03T09:49:34Z","file_size":4124471,"relation":"main_file"}],"oa":1,"ddc":["530"],"date_created":"2021-02-28T23:01:25Z","_id":"9207","day":"15","ec_funded":1,"project":[{"name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"scopus_import":"1","department":[{"_id":"BjHo"}],"isi":1,"article_number":"A24","date_published":"2021-02-15T00:00:00Z","acknowledgement":"We thank Y. Duguet, S. Gomé, G. Lemoult, T. Liu, B. Semin and L.S. Tuckerman for\r\nfruitful discussions. \r\nThis work was supported by a grant, TRANSFLOW, provided by the Agence Nationale de\r\nla Recherche (ANR). A.M.P. was partially supported by the French Embassy in Russia (I.I. Mechnikov scholarship) and by the Russian Science Foundation (project no. 18-79-00189). L.K. was partially supported by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 754411.","has_accepted_license":"1","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"volume":912,"intvolume":"       912","type":"journal_article","status":"public","abstract":[{"text":"In this paper we experimentally study the transitional range of Reynolds numbers in\r\nplane Couette–Poiseuille flow, focusing our attention on the localized turbulent structures\r\ntriggered by a strong impulsive jet and the large-scale flow generated around these\r\nstructures. We present a detailed investigation of the large-scale flow and show how\r\nits amplitude depends on Reynolds number and amplitude perturbation. In addition,\r\nwe characterize the initial dynamics of the localized turbulent spot, which includes the\r\ncoupling between the small and large scales, as well as the dependence of the advection\r\nspeed on the large-scale flow generated around the spot. Finally, we provide the first\r\nexperimental measurements of the large-scale flow around an oblique turbulent band.","lang":"eng"}],"file_date_updated":"2021-03-03T09:49:34Z","language":[{"iso":"eng"}],"oa_version":"Published Version","article_processing_charge":"Yes (via OA deal)","quality_controlled":"1","article_type":"original"},{"title":"Decay of streaks and rolls in plane Couette-Poiseuille flow","publication_identifier":{"eissn":["1469-7645"],"issn":["0022-1120"]},"year":"2021","publisher":"Cambridge University Press","date_updated":"2023-08-07T14:30:11Z","publication":"Journal of Fluid Mechanics","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","month":"03","doi":"10.1017/jfm.2021.89","author":[{"first_name":"T.","last_name":"Liu","full_name":"Liu, T."},{"full_name":"Semin, B.","last_name":"Semin","first_name":"B."},{"first_name":"Lukasz","orcid":"0000-0003-1740-7635","last_name":"Klotz","id":"2C9AF1C2-F248-11E8-B48F-1D18A9856A87","full_name":"Klotz, Lukasz"},{"full_name":"Godoy-Diana, R.","last_name":"Godoy-Diana","first_name":"R."},{"last_name":"Wesfreid","full_name":"Wesfreid, J. E.","first_name":"J. E."},{"first_name":"T.","full_name":"Mullin, T.","last_name":"Mullin"}],"external_id":{"isi":["000629677500001"],"arxiv":["2008.08851"]},"citation":{"apa":"Liu, T., Semin, B., Klotz, L., Godoy-Diana, R., Wesfreid, J. E., &#38; Mullin, T. (2021). Decay of streaks and rolls in plane Couette-Poiseuille flow. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2021.89\">https://doi.org/10.1017/jfm.2021.89</a>","short":"T. Liu, B. Semin, L. Klotz, R. Godoy-Diana, J.E. Wesfreid, T. Mullin, Journal of Fluid Mechanics 915 (2021).","mla":"Liu, T., et al. “Decay of Streaks and Rolls in Plane Couette-Poiseuille Flow.” <i>Journal of Fluid Mechanics</i>, vol. 915, A65, Cambridge University Press, 2021, doi:<a href=\"https://doi.org/10.1017/jfm.2021.89\">10.1017/jfm.2021.89</a>.","ieee":"T. Liu, B. Semin, L. Klotz, R. Godoy-Diana, J. E. Wesfreid, and T. Mullin, “Decay of streaks and rolls in plane Couette-Poiseuille flow,” <i>Journal of Fluid Mechanics</i>, vol. 915. Cambridge University Press, 2021.","ama":"Liu T, Semin B, Klotz L, Godoy-Diana R, Wesfreid JE, Mullin T. Decay of streaks and rolls in plane Couette-Poiseuille flow. <i>Journal of Fluid Mechanics</i>. 2021;915. doi:<a href=\"https://doi.org/10.1017/jfm.2021.89\">10.1017/jfm.2021.89</a>","chicago":"Liu, T., B. Semin, Lukasz Klotz, R. Godoy-Diana, J. E. Wesfreid, and T. Mullin. “Decay of Streaks and Rolls in Plane Couette-Poiseuille Flow.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2021. <a href=\"https://doi.org/10.1017/jfm.2021.89\">https://doi.org/10.1017/jfm.2021.89</a>.","ista":"Liu T, Semin B, Klotz L, Godoy-Diana R, Wesfreid JE, Mullin T. 2021. Decay of streaks and rolls in plane Couette-Poiseuille flow. Journal of Fluid Mechanics. 915, A65."},"publication_status":"published","oa":1,"date_created":"2021-03-28T22:01:42Z","day":"17","_id":"9297","scopus_import":"1","isi":1,"department":[{"_id":"BjHo"}],"acknowledgement":"We gratefully acknowledge Joran Rolland, Yohann Duguet, Romain Monchaux, S´ebastien Gom´e, Laurette Tuckerman, Dwight Barkley, Olivier Dauchot and Sabine Bottin for fruitful discussions. We thank Xavier Benoit-Gonin, Amaury Fourgeaud, Thierry Darnige, Olivier Brouard and Justine Laurent for technical help. This work has benefited from the ANR TransFlow, and by starting grants obtained by B.S. from CNRS (INSIS) and ESPCI. T.M. was\r\nsupported by a Joliot visiting professorship grant from ESPCI.","article_number":"A65","date_published":"2021-03-17T00:00:00Z","arxiv":1,"intvolume":"       915","volume":915,"status":"public","type":"journal_article","abstract":[{"text":"We report the results of an experimental investigation into the decay of turbulence in plane Couette–Poiseuille flow using ‘quench’ experiments where the flow laminarises after a sudden reduction in Reynolds number Re. Specifically, we study the velocity field in the streamwise–spanwise plane. We show that the spanwise velocity containing rolls decays faster than the streamwise velocity, which displays elongated regions of higher or lower velocity called streaks. At final Reynolds numbers above 425, the decay of streaks displays two stages: first a slow decay when rolls are present and secondly a more rapid decay of streaks alone. The difference in behaviour results from the regeneration of streaks by rolls, called the lift-up effect. We define the turbulent fraction as the portion of the flow containing turbulence and this is estimated by thresholding the spanwise velocity component. It decreases linearly with time in the whole range of final Re. The corresponding decay slope increases linearly with final Re. The extrapolated value at which this decay slope vanishes is Reaz≈656±10, close to Reg≈670 at which turbulence is self-sustained. The decay of the energy computed from the spanwise velocity component is found to be exponential. The corresponding decay rate increases linearly with Re, with an extrapolated vanishing value at ReAz≈688±10. This value is also close to the value at which the turbulence is self-sustained, showing that valuable information on the transition can be obtained over a wide range of Re.","lang":"eng"}],"oa_version":"Preprint","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2008.08851"}],"article_processing_charge":"No","article_type":"original","quality_controlled":"1"}]