February 2022 - semfis - Mailing lists@ IFISC

REGISTRATION REQUIRED: Special IFISC seminar Tuesday 8th March, 1500
by Tobias Galla 10 Feb '22

10 Feb '22

Dear All, We will have a special IFISC seminar on Tuesday 8th March at 15:00. This is a webinar organised jointly with the Institute of Physics presenting a recent special issue in JPhys Complexity, titled `Complex Systems Approaches to Information Processing’, edited by Maxi San Miguel, Claudio Mirasso and Ingo Fischer. PLEASE NOTE: You need to register for this event ahead of time. This can be done here: https://register.gotowebinar.com/register/8529868692589874188 The general topic of the webinar is the subject of the research program of IFISC´s Maria de Maeztu Unit of Excellence. This event brings together five different perspectives from this endeavour - all contributions from the special issue - and aims to explore the role that complex systems science plays in connecting the various involved fields. These speakers are: Karoline Wiesner: Professor of Complexity Science, Department of Physics and Astronomy, University of Potsdam, Germany Hiba Sheheitli: Postdoctoral Researcher, Institut de Neurosciences des Systèmes, Inserm and Aix-Marseille University, France Marc Timme: Chair for Network Dynamics, Center for Advancing Electronics Dresden (CFAED), TU Dresden, Germany Daniel Gauthier: Professor of Physics at The Ohio State University, USA Roberta Zambrini: Tenured researcher at IFISC Everyone is invited to participate in the round table discussion closing the webinar. The full special issue can be found here: https://iopscience.iop.org/journal/2632-072X/page/Focus_on_Complex_Systems_… Best wishes, Maxi and Tobias Tobias Galla Instituto de Física Interdisciplinar y Sistemas Complejos (IFISC) tobias.galla(a)ifisc.uib-csic.es @tobiasgalla

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Reminder: IFISC Seminar, TODAY - Wednesday, Feb 09, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 09 Feb '22

09 Feb '22

IFISC Seminar on Wednesday Feb 09, 2022 at 12:00 Place: Zoom Seminar Title: Higher-Order Kuramoto dynamics on Simplicial Complexes Speaker: Joaquin J. Torres, Universidad de Granada Abstract: &nbsp; In this talk I report some of our recent findings concerning the emergence of synchronization transition in higher-order Kuramoto dynamics on simplicial complexes.&nbsp;The higher-order interactions of complex systems, such as the brain, are captured by their simplicial complex structure and have a significant effect on dynamics. Most of the existing dynamical models defined on simplicial complexes make the strong assumption that the dynamics resides exclusively on the nodes, which is a strong simplification. Here we formulate the higher-order Kuramoto model which describes the interactions between oscillators placed not only on nodes but also on links, triangles, and so on. We explore conditions in which&nbsp; higher-order Kuramoto dynamics can lead to an explosive synchronization transition which is achieved using an adaptive coupling dependent on the solenoidal and the irrotational component of the dynamics. [PLEASE NOTE THE UNUSUAL START TIME 12:00] <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/higher-order-kuramoto-dynamics-on-simplicial-compl/

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IFISC Seminar on Wednesday, Feb 09, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 08 Feb '22

08 Feb '22

IFISC Seminar on Wednesday Feb 09, 2022 at 12:00 Place: Zoom Seminar Title: Higher-Order Kuramoto dynamics on Simplicial Complexes Speaker: Joaquin J. Torres, Universidad de Granada Abstract: &nbsp; In this talk I report some of our recent findings concerning the emergence of synchronization transition in higher-order Kuramoto dynamics on simplicial complexes.&nbsp;The higher-order interactions of complex systems, such as the brain, are captured by their simplicial complex structure and have a significant effect on dynamics. Most of the existing dynamical models defined on simplicial complexes make the strong assumption that the dynamics resides exclusively on the nodes, which is a strong simplification. Here we formulate the higher-order Kuramoto model which describes the interactions between oscillators placed not only on nodes but also on links, triangles, and so on. We explore conditions in which&nbsp; higher-order Kuramoto dynamics can lead to an explosive synchronization transition which is achieved using an adaptive coupling dependent on the solenoidal and the irrotational component of the dynamics. [PLEASE NOTE THE UNUSUAL START TIME 12:00] <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/higher-order-kuramoto-dynamics-on-simplicial-compl/

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Talk on Tuesday, Feb 15, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 03 Feb '22

03 Feb '22

Talk on Tuesday Feb 15, 2022 at 11:00 Place: Zoom Seminar Title: An improved estimator of Shannon entropy with applications to systems with memory Speaker: Juan de Gregorio, IFISC (UIB-CSIC) Abstract: Many systems can be described with Markovian models in which the future state of the system only depends on its present state. While in some cases this is enough to predict the evolution of the system, in other cases it is necessary to take into account also the past states of the system. Which is the minimum number of past states needed in order to faithfully predict the future state of the system? It turns out that a simple answer to this question can be found from an analysis of Shannon entropy. Much work has been devoted in the past to obtain an accurate estimator of Shannon entropy for data coming from small samples. In this talk I will present an entropy estimator that takes into account time correlations and is particular useful to study systems with memory. As an example I will apply this method to the determination of the minimum memory required to describe lexical statistics of texts in different languages and daily precipitations in different worldwide locatio ns. https://uibuniversitat.zoom.us/j/82040031215 Url event:https://ifisc.uib-csic.es/en/events/seminars/an-improved-estimator-of-shannon-entropy-with-appl/

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Reminder: Talk, TODAY - Thursday, Feb 03, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 03 Feb '22

03 Feb '22

Talk on Thursday Feb 03, 2022 at 11:00 Place: Zoom Seminar Title: Liquid-Hexatic-Solid phases in active and passive Brownian particles driven by stochastic birth-death events Speaker: Alejandro Almodóvar Del Pozo, IFISC Abstract: The behaviour of active matter has been intensively investigated in the last decades partly because of its many applications to living systems. In this work we add stochastic birth-death dynamics to a system of particles with volume exclusion. This is a simple, but general biological ingredient and has not been studied in detail before. The number of particles in the system at long times depends on the birth and death rates, and on a parameter characterising the activity of self-propelled particles. We find liquid, solid and hexatic phases in the absence of activity. Which one of these phases is realised depends on the birth and death rates. In active systems we also find motility induced phase separation (MIPS) when the self-propulsion velocity is large and the birth rate small enough. In the MIPS phase the solid and liquid states coexist. <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/liquid-hexatic-solid-phases-in-active-and-passive/

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Reminder: IFISC Seminar, TODAY - Wednesday, Feb 02, 2022 at 14:30
by semfis＠ifisc.uib-csic.es 02 Feb '22

02 Feb '22

IFISC Seminar on Wednesday Feb 02, 2022 at 14:30 Place: Zoom Seminar Title: Digital proximity tracing on empirical contact networks for pandemic control Speaker: Giulia Cencetti, FBK Foundation, Trento (Italy ) Abstract: Digital contact tracing is a relevant tool to control infectious disease outbreaks, including the COVID-19 epidemic. Early work evaluating digital contact tracing omitted important features and heterogeneities of real-world contact patterns influencing contagion dynamics. The gap can be filled with a modeling framework informed by empirical high-resolution contact data to analyze the impact of digital contact tracing in the COVID-19 pandemic. We investigate how well contact tracing apps, coupled with the quarantine of identified contacts, can mitigate the spread in real environments. We find that restrictive policies are more effective in containing the epidemic but come at the cost of unnecessary large-scale quarantines. Policy evaluation through their efficiency and cost results in optimized solutions which only consider contacts longer than 15-20 minutes and closer than 2-3 meters to be at risk. Our results show that isolation and tracing can help control re-emerging outbreaks when some conditions are met: (i) a reduction of the reproductive number through masks and physical distance; (ii) a low-delay isolation of infected individuals; (iii) a high compliance. Finally, we observe the inefficacy of a less privacy-preserving tracing involving second order contacts. Our results may inform digital contact tracing efforts currently being implemented across several countries worldwide. link zoom: https://us02web.zoom.us/j/83829318876?pwd=Z2pqbUtIMEV3NUQvU0hpakp0NGtsUT09&… Url event:https://ifisc.uib-csic.es/en/events/seminars/digital-proximity-tracing-on-empirical-contact-net/

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Talk on Tuesday, Feb 01, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 01 Feb '22

01 Feb '22

Talk on Tuesday Feb 01, 2022 at 11:00 Place: IFISC Seminar Room Title: Data analysis of frequency fluctuations in the Balearic grid before and after coal closure Speaker: María Martínez-Barbeito, IFISC (CSIC-UIB) Abstract: <pre> In 2019, the most polluting power station in the Balearic Islands was partially close down, marking the end of coal as the main energy source in the territory. In this talk, I will analyze the differences in the statistics of fluctuations of the electrical frequency before and after the closure. </pre> Zoom Connection: ID:&nbsp;860 9228 1058 Password:&nbsp;325352 Link:&nbsp;https://us02web.zoom.us/j/86092281058?pwd=ZWFjVkRPNjJCb1N1UGt6M3lZc1I4UT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/data-analysis-of-frequency-fluctuations-in-the-bal/

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Reminder: Talk, TODAY - Tuesday, Feb 01, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 01 Feb '22

01 Feb '22

Talk on Tuesday Feb 01, 2022 at 11:00 Place: IFISC Seminar Room Title: Data analysis of frequency fluctuations in the Balearic grid before and after coal closure Speaker: María Martínez-Barbeito, IFISC (CSIC-UIB) Abstract: <pre> In 2019, the most polluting power station in the Balearic Islands was partially close down, marking the end of coal as the main energy source in the territory. In this talk, I will analyze the differences in the statistics of fluctuations of the electrical frequency before and after the closure. </pre> &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/data-analysis-of-frequency-fluctuations-in-the-bal/

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