December 2021 - semfis - Mailing lists@ IFISC

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

21 Dec '21

IFISC Seminar on Tuesday Dec 21, 2021 at 14:30 Place: Zoom Seminar Title: IFISC Winter Solstice Seminar Speaker: IFISC members, IFISC Abstract: 1.- M. Zanin. Algorithmic Approaches for Assessing Irreversibility in Time Series 2.- E. Estrada. Path Laplacians versus fractional Laplacians as nonlocal operators on networks 3.- I. Fischer. Deep neural networks using a single neuron: folded-in-time architecture using feedback-modulated delay loops. 4.- R. Zambrini. Dynamical Phase Transitions in Quantum Reservoir Computing 5.- Ll. Serra. Fabry&ndash;P&eacute;rot interferometry with gate-tunable 3D topological insulator nanowires 6.- C. Lopez. Lagrangian betweenness as a measure of bottlenecks in dynamical systems with oceanographic examples 7.- V.M. Eguiluz. The global network of ports supporting high seas fishing 8.- M. Matias. Modelling Parasite-produced Marine Diseases: The case of the Mass Mortality Event of Pinna nobilis 9.- S. Meloni. An ecological approach to structural flexibility in online communication systems 10.- L. Lacasa. A population-based controlled experiment assessing the epidemiological impact of digital contact tracing 11.- D. Sanchez. Capturing the diversity of multilingual societies 12. T. Galla. Geospatial distributions reflect temperatures of linguistic features 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/ifisc-winter-solstice-seminar-3/

1 0

Reminder: Talk, TODAY - Monday, Dec 20, 2021 at 10:30
by semfis＠ifisc.uib-csic.es 20 Dec '21

20 Dec '21

Talk on Monday Dec 20, 2021 at 10:30 Place: Zoom Seminar Title: Dynamical approach to microbial communities abundance data Speaker: Somaye Sheykhali, IFISC (CSIC-UIB) Abstract: We introduce a methdology to infer interactions in a generalized Lotka-Volterra model applied to microbial abundance time series. Zoom link: https://us02web.zoom.us/j/84241350871?pwd=ZTAzRWtjSGpKK3dFbkdQWG81Tng4Zz09&… Meeting ID: 842 4135 0871 Passcode: 120210 Url event:https://ifisc.uib-csic.es/en/events/seminars/dynamical-approach-to-microbial-communities-abunda/

1 0

Talk on Monday, Dec 20, 2021 at 10:30
by semfis＠ifisc.uib-csic.es 17 Dec '21

17 Dec '21

Talk on Monday Dec 20, 2021 at 10:30 Place: Zoom Seminar Title: Dynamical approach to microbial communities abundance data Speaker: Somaye Sheykhali, IFISC (CSIC-UIB) Abstract: We introduce a methdology to infer interactions in a generalized Lotka-Volterra model applied to microbial abundance time series. Zoom link: https://us02web.zoom.us/j/84241350871?pwd=ZTAzRWtjSGpKK3dFbkdQWG81Tng4Zz09&… Meeting ID: 842 4135 0871 Passcode: 120210 Url event:https://ifisc.uib-csic.es/en/events/seminars/dynamical-approach-to-microbial-communities-abunda/

1 0

IFISC Seminar on Tuesday, Dec 21, 2021 at 14:30
by semfis＠ifisc.uib-csic.es 17 Dec '21

17 Dec '21

IFISC Seminar on Tuesday Dec 21, 2021 at 14:30 Place: Zoom Seminar Title: IFISC Winter Solstice Seminar Speaker: IFISC members, IFISC Abstract: 1.- M. Zanin. Algorithmic Approaches for Assessing Irreversibility in Time Series 2.- E. Estrada. Path Laplacians versus fractional Laplacians as nonlocal operators on networks 3.- I. Fischer. Deep neural networks using a single neuron: folded-in-time architecture using feedback-modulated delay loops. 4.- R. Zambrini. Dynamical Phase Transitions in Quantum Reservoir Computing 5.- Ll. Serra. Fabry&ndash;P&eacute;rot interferometry with gate-tunable 3D topological insulator nanowires 6.- C. Lopez. Lagrangian betweenness as a measure of bottlenecks in dynamical systems with oceanographic examples 7.- V.M. Eguiluz. The global network of ports supporting high seas fishing 8.- M. Matias. Modelling Parasite-produced Marine Diseases: The case of the Mass Mortality Event of Pinna nobilis 9.- S. Meloni. An ecological approach to structural flexibility in online communication systems 10.- L. Lacasa. A population-based controlled experiment assessing the epidemiological impact of digital contact tracing 11.- D. Sanchez. Capturing the diversity of multilingual societies 12. T. Galla. Geospatial distributions reflect temperatures of linguistic features 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/ifisc-winter-solstice-seminar-3/

1 0

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/

1 0

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/

1 0

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/

1 0