- semfis - Mailing lists@ IFISC

Reminder: IFISC Seminar, TODAY - Wednesday, Dec 15, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 15 Dec '21

15 Dec '21

IFISC Seminar on Wednesday Dec 15, 2021 at 14:30 Place: Zoom Seminar Title: Models of nested populations: how does collective function evolve? Speaker: Silvia de Monte, ENS Paris Abstract: Directed evolution experiments have demonstrated the possibility to select genes or cellular lineages with specific characteristics or functions. Increasing effort is devoted to applying the same principles to microbial communities. I will first describe a model of&nbsp;a community of two species.&nbsp;I will show that collective-level selection drives the evolution of interspecific interactions, so that the target function becomes heritable&nbsp;via the emergence of a &#39;development&#39; that corrects for the possible stochastic variation in community composition. The second model descibes a large number of species.&nbsp;Interactions&nbsp;are assumed to be initially random, and selection is applied to the total population size. Analytical approximations reproduce numerical simulations and the interplay of directional and stochastic variation.&nbsp;They show that&nbsp;selection for higher biomass enhance mutualism and diversity. <a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/models-of-nested-populations-how-does-collective-f/

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IFISC Seminar on Wednesday, Dec 15, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 10 Dec '21

10 Dec '21

IFISC Seminar on Wednesday Dec 15, 2021 at 14:30 Place: Zoom Seminar Title: Models of nested populations: how does collective function evolve? Speaker: Silvia de Monte, ENS Paris Abstract: Directed evolution experiments have demonstrated the possibility to select genes or cellular lineages with specific characteristics or functions. Increasing effort is devoted to applying the same principles to microbial communities. I will first describe a model of&nbsp;a community of two species.&nbsp;I will show that collective-level selection drives the evolution of interspecific interactions, so that the target function becomes heritable&nbsp;via the emergence of a &#39;development&#39; that corrects for the possible stochastic variation in community composition. The second model descibes a large number of species.&nbsp;Interactions&nbsp;are assumed to be initially random, and selection is applied to the total population size. Analytical approximations reproduce numerical simulations and the interplay of directional and stochastic variation.&nbsp;They show that&nbsp;selection for higher biomass enhance mutualism and diversity. <a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/models-of-nested-populations-how-does-collective-f/

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Reminder: IFISC Seminar, TODAY - Wednesday, Dec 01, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 01 Dec '21

01 Dec '21

IFISC Seminar on Wednesday Dec 01, 2021 at 14:30 Place: Zoom Seminar Title: Memories as attractor neural networks Speaker: Francesca Schönsberg, SISSA Abstract: Higher cognitive capacities rely on the possibility to memorize, in the brain, noisy variables. Memories are generally understood to be realized as configurations of activity towards which specific populations of neurons are &ldquo;attracted&rdquo;, i.e towards which they dynamically converge, if properly cued.&nbsp;In the seminar, I will briefly show that biologically plausible self-organized learning rules can, counterintuitively, outperform optimized iterative algorithms in the ability to store discrete attractors. Then, I will mainly focus on the storage of the activity patterns of spatially selective cells, as place cells, neuronal candidates involved in the creation of cognitive maps. Recent experimental results showed that the activity patterns of place cells are highly irregular in complex environments, failing to be described by standard continuous attractors, which require homogeneity across units. Here we show that a continuous attractor theory can contemplate irregularities if relaxing the requirement of a continuous manifold of fixed points to a continuous dynamical flow, which, we see, persists up to a phase transition. This result leads us to hypothesize that place maps may be effectively memorized in continuous quasi-attractive manifolds. Zoom: <a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> Url event:https://ifisc.uib-csic.es/en/events/seminars/memories-as-attractor-neural-networks/

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Reminder: PhD Thesis Defense, TODAY - Monday, Nov 29, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 29 Nov '21

29 Nov '21

PhD Thesis Defense on Monday Nov 29, 2021 at 14:30 Place: Zoom Seminar Title: Synchronization and collective phenomena in quantum dissipative systems Speaker: Albert Cabot, IFISC Abstract: PhD Thesis defense,&nbsp;ZOOM LINK: https://uibuniversitat.zoom.us/j/88182416032?pwd=QlJ2SlA4R3VhSGdlcUdCcjhWRnhsZz09 Thesis Supervisors: Roberta Zambrini and&nbsp;Gian Luca Giorgi Jury members: Rosario Fazio&nbsp;(President) Susana Huelga&nbsp;(Secretary) Igor Lesanovsky&nbsp;(Vocal) Url event:https://ifisc.uib-csic.es/en/events/seminars/synchronization-and-collective-phenomena-in-quantu/

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PhD Thesis Defense on Monday, Nov 29, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 26 Nov '21

26 Nov '21

PhD Thesis Defense on Monday Nov 29, 2021 at 14:30 Place: Zoom Seminar Title: Synchronization and collective phenomena in quantum dissipative systems Speaker: Albert Cabot, IFISC Abstract: PhD Thesis defense,&nbsp;ZOOM LINK: https://uibuniversitat.zoom.us/j/88182416032?pwd=QlJ2SlA4R3VhSGdlcUdCcjhWRnhsZz09 Thesis Supervisors: Roberta Zambrini and&nbsp;Gian Luca Giorgi Jury members: Rosario Fazio&nbsp;(President) Susana Huelga&nbsp;(Secretary) Igor Lesanovsky&nbsp;(Vocal) Url event:https://ifisc.uib-csic.es/en/events/seminars/synchronization-and-collective-phenomena-in-quantu/

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IFISC Seminar on Wednesday, Dec 01, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 26 Nov '21

26 Nov '21

IFISC Seminar on Wednesday Dec 01, 2021 at 14:30 Place: Zoom Seminar Title: Memories as attractor neural networks Speaker: Francesca Schönsberg, SISSA Abstract: Zoom: <a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> Url event:https://ifisc.uib-csic.es/en/events/seminars/memories-as-attractor-neural-networks/

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Reminder: IFISC Seminar, TODAY - Wednesday, Nov 24, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 24 Nov '21

24 Nov '21

IFISC Seminar on Wednesday Nov 24, 2021 at 14:30 Place: Zoom Seminar Title: Effects of habitat fragmentation on diversity patterns in a heterogeneous environment Speaker: Viviane Moraes de Oliveira, Departamento de Física - UFRPE Abstract: Through a resource-based model, we investigate how the mode of habitat loss and fragmentation can affect the levels of biodiversity in an ecosystem.&nbsp;In our model, habitat loss is performed using a fractal landscape to adjust the roughness of the landscape. We show that both the mode of habitat loss&nbsp;and the level of environmental heterogeneity influence species distribution patterns. We observed a more significant impact of fragmentation on the&nbsp;number of species when fragments are more compact. We also note that a unimodal function well describes the relationship between biodiversity and heterogeneity. Zoom code:&nbsp;<a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> Url event:https://ifisc.uib-csic.es/en/events/seminars/effects-of-habitat-fragmentation-on-diversity-patt/

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IFISC Seminar on Wednesday, Nov 24, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 19 Nov '21

19 Nov '21

IFISC Seminar on Wednesday Nov 24, 2021 at 14:30 Place: Zoom Seminar Title: Effects of habitat fragmentation on diversity patterns in a heterogeneous environment Speaker: Viviane Moraes de Oliveira, Departamento de Física - UFRPE Abstract: Through a resource-based model, we investigate how the mode of habitat loss and fragmentation can affect the levels of biodiversity in an ecosystem.&nbsp;In our model, habitat loss is performed using a fractal landscape to adjust the roughness of the landscape. We show that both the mode of habitat loss&nbsp;and the level of environmental heterogeneity influence species distribution patterns. We observed a more significant impact of fragmentation on the&nbsp;number of species when fragments are more compact. We also note that a unimodal function well describes the relationship between biodiversity and heterogeneity. Zoom code:&nbsp;<a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> Url event:https://ifisc.uib-csic.es/en/events/seminars/effects-of-habitat-fragmentation-on-diversity-patt/

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Reminder: PhD Thesis Defense, TODAY - Friday, Nov 19, 2021 at 10:30
by semfis＠ifisc.uib-csic.es 19 Nov '21

19 Nov '21

PhD Thesis Defense on Friday Nov 19, 2021 at 10:30 Place: IFISC Seminar Room Title: Study on the role of inhibition on granule cells of the dentate gyrus in the propagation of activity and computation in the hippocampus Speaker: Cristian Estarellas Martín, IFISC Abstract: PhD Thesis The PhD defense can be followed&nbsp;both presentially (until room capacity is filled, 23 persons) and online. <a class="moz-txt-link-freetext" href="https://us02web.zoom.us/j/87128800874?pwd=SmdUMm1LZUx6VTdtVzUvMnpsVkJ1Zz09">https://us02web.zoom.us/j/87128800874?pwd=SmdUMm1LZUx6VTdtVzUvMnpsVkJ1Zz09</a> ID meeting: 871 2880 0874 Code: 682598 Jury Members : Cristina Masoller (President) Miguel Valencia (Secretary) Albert Compte (Vocal) Url event:https://ifisc.uib-csic.es/en/events/seminars/study-on-the-role-of-inhibition-on-granule-cells-o/

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Reminder: IFISC Seminar, TODAY - Wednesday, Nov 17, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 17 Nov '21

17 Nov '21

IFISC Seminar on Wednesday Nov 17, 2021 at 14:30 Place: Zoom Seminar Title: Modelling Human Behaviour and Cognition with Network Science Speaker: Sofia Teixeira, University of Lisbon. Abstract: Networks are a simple and intuitive framework to model evolutionary events, human behaviour and cognition. In this talk, I will walk you through two network science approaches to evaluate how centrality and neighborhood structure can be key to infer collective behaviour in two different case studies: eliciting collective fairness in a multiplayer bargaining game, and reconstructing the mindset expressed in multiple suicide notes. &nbsp; <a href="https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09">https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09</a> Url event:https://ifisc.uib-csic.es/en/events/seminars/modelling-human-behaviour-and-cognition-with-netwo/

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