- semfis - Mailing lists@ IFISC

Talk on Tuesday, Sep 20, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 16 Sep '22

16 Sep '22

Talk on Tuesday Sep 20, 2022 at 12:00 Place: IFISC Seminar Room Title: New simple model for pattern formation in coral reefs Speaker: Miguel Álvarez-Alegría, IFISC Abstract: Coral reefs are one of the most fascinating ecosystems in the world. Even without considering interactions with the whole reef wildlife, corals biology is plenty of complex phenomena such as the symbiosis with microalgae and emergent properties such as synchronized sexual events under very specific conditions. Many coral species self-organize&nbsp;into well defined structures such as: massive, branching and table coral colonies.&nbsp;Colonies living in the same region constitute a reef. Various coral species synthesize aragonite (a phase of calcium carbonate) during their clonal growth to build themselves a hard exoskeleton. When an entire colony dies, another new coral polyp can settle over the hard structure left behind by the dead colony and start a new colony on top of these remains. This process is repeated over centuries leading to the formation of large aragonite structures which display some recognizable patterns that can be spotted around the world. These include closed atolls and parallel stripes, together with large groups of closed atolls and little halos inside these big atolls (an example of self-similarity in this system). In this work, we address the study of pattern formation in coral reefs by proposing a set of differential equations that govern the spatiotemporal evolution of some variables describing the system, taking into account corals ecology and the&nbsp;key role of hydrodynamics in reef shaping. Url event:https://ifisc.uib-csic.es/en/events/seminars/new-simple-model-for-pattern-formation-in-coral-re/

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IFISC Seminar on Wednesday, Sep 21, 2022 at 14:30
by semfis＠ifisc.uib-csic.es 16 Sep '22

16 Sep '22

IFISC Seminar on Wednesday Sep 21, 2022 at 14:30 Place: IFISC Seminar Room Title: The Knowledge Acquisition process from a Complex System perspective Speaker: Fátima Velásquez-Rojas, IFISC Abstract: The process of acquiring knowledge is one of the most complex for the human being since it involves individual and social processes that have been studied by various epistemological currents. The educational context where this process is developed is of great relevance since it represents the meeting space between teachers and students, in which a fundamental part of the construction of new knowledge occurs. On this occasion, I will share the results of the works published during the time I was working in this area, which, although it has been little explored from complex systems, offers a phenomenological richness that is not indifferent to us. We will start by proposing the modeling of the knowledge acquisition process in a known regular educational context and then move on to how this process was affected during the COVID-19 pandemic. These works shed light on the internal dynamics of the classroom and allow us to understand some global aspects of the teaching-learning process. Presential seminar, with parallel Zoom stream:&nbsp;&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/the-knowledge-acquisition-process-from-a-complex-s/

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

14 Sep '22

IFISC Seminar on Wednesday Sep 14, 2022 at 14:30 Place: IFISC Seminar Room Title: Regional Interaction Networks at the origin of the Neolithic in the Near East Speaker: Juan José Ibáñez and Fiona Pichon, Institución Milá y Fontanals de investigación en Humanidades (IMF), CSIC (Barcelona) Abstract: The Neolithic is the period of Prehistory when villages of farming communities appeared. The transition from nomadic hunter gatherer communities to sedentary farming societies is one of the crucial periods in human history. This shift took place, for the first time, in the Fertile Crescent, between 14,000 and 9,000 years ago. Characterizing the regional cultural interactions is a key element for understanding how the transition to the Neolithic was possible. These interactions can be tracked through the analysis of obsidian trade from SE Anatolia to the rest of the Fertile Crescent. Our previous studies demonstrated that obsidian was transferred through complex networks linking distant Neolithic villages. Using our database of obsidian quantities in archaeological sites, we would like to characterize the interaction networks through time. Modelling the transfer of innovations though the previously characterized networks of interaction and comparing modelling results with the actual rhythms of expansion of innovations in the past could help us to understand how the Neolithic emerged. In fact, we think that the Neolithic could be explain as an emergent phenomenon of a growing network of interaction. Presential seminar, with parallel Zoom stream:&nbsp;&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/regional-interaction-networks-at-the-origin-of-the/

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IFISC Seminar on Wednesday, Sep 14, 2022 at 14:30
by semfis＠ifisc.uib-csic.es 09 Sep '22

09 Sep '22

IFISC Seminar on Wednesday Sep 14, 2022 at 14:30 Place: IFISC Seminar Room Title: Regional Interaction Networks at the origin of the Neolithic in the Near East Speaker: Juan José Ibáñez and Fiona Pichon, Institución Milá y Fontanals de investigación en Humanidades (IMF), CSIC (Barcelona) Abstract: The Neolithic is the period of Prehistory when villages of farming communities appeared. The transition from nomadic hunter gatherer communities to sedentary farming societies is one of the crucial periods in human history. This shift took place, for the first time, in the Fertile Crescent, between 14,000 and 9,000 years ago. Characterizing the regional cultural interactions is a key element for understanding how the transition to the Neolithic was possible. These interactions can be tracked through the analysis of obsidian trade from SE Anatolia to the rest of the Fertile Crescent. Our previous studies demonstrated that obsidian was transferred through complex networks linking distant Neolithic villages. Using our database of obsidian quantities in archaeological sites, we would like to characterize the interaction networks through time. Modelling the transfer of innovations though the previously characterized networks of interaction and comparing modelling results with the actual rhythms of expansion of innovations in the past could help us to understand how the Neolithic emerged. In fact, we think that the Neolithic could be explain as an emergent phenomenon of a growing network of interaction. Presential seminar, with parallel Zoom stream:&nbsp;&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/regional-interaction-networks-at-the-origin-of-the/

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Reminder: Talk, TODAY - Wednesday, Sep 07, 2022 at 15:00
by semfis＠ifisc.uib-csic.es 07 Sep '22

07 Sep '22

Talk on Wednesday Sep 07, 2022 at 15:00 Place: Classroom 5, Antoni M. Alcover Building (Edificio Postgrado) Title: Air transport through the (statistical physics) looking glass Speaker: Massimiliano Zanin, IFISC (UIB-CSIC) Abstract: Air transport, while being a highly engineered system, is also a complex one, whose dynamics emerges from the interactions between a plethora of heterogeneous elements, and develops over multiple spatial and temporal scales. Statistical physics naturally provides numerous tools for understanding its behaviour, and, not surprisingly, a large number of research works have adopted such view-point in the last decades. In this talk we are going to briefly review some applications, from the description of the global structure of airports through complex network theory, to the study of the dynamics of individual flights and of their interactions. Url event:https://ifisc.uib-csic.es/en/events/seminars/air-transport-through-the-statistical-physics-look/

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Reminder: Master Thesis, TODAY - Friday, Sep 02, 2022 at 16:00
by semfis＠ifisc.uib-csic.es 02 Sep '22

02 Sep '22

Master Thesis on Friday Sep 02, 2022 at 16:00 Place: Zoom Seminar Title: Generating functional analysis of Lotka-Volterra equations with Hebbian couplings Speaker: Enrique Rozas García, IFISC Abstract: We study a benchmark model in theoretical ecology for population dynamics, the generalized Lotka-Volterra equations, for the case of random Hebbian couplings. A set of binary traits describes each species in the ecosystem and we assume the interaction between any two species to be stronger the more traits they share. We use the generating functional method to derive an effective process with the same statistical properties as the Lotka-Volterra dynamics. This effective process is then used to study the resulting dynamically evolved communities, the different phases of the system, and the transitions between them. We check the predictions of the theory against numerical simulations. We find that increasing the number of traits leads to reduced community sizes and increases instability. Zoom link:&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Supervisor: Tobias Galla Futher jury members: Emilio Hernandez-Garcia, Raul&nbsp;Toral &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/generating-functional-analysis-of-lotka-volterra-e/

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Reminder: Talk, TODAY - Thursday, Sep 01, 2022 at 15:00
by semfis＠ifisc.uib-csic.es 01 Sep '22

01 Sep '22

Talk on Thursday Sep 01, 2022 at 15:00 Place: Classroom 5, Antoni M. Alcover Building (Edificio Postgrado) Title: Photonic Reservoir Computing Speaker: Miguel C. Soriano, IFISC (UIB-CSIC) Abstract: Seminar within the X GEFENOL Summer School on Statistical Physics of Complex Systems Url event:https://ifisc.uib-csic.es/en/events/seminars/photonic-reservoir-computing/

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Reminder: Talk, TODAY - Wednesday, Aug 31, 2022 at 15:00
by semfis＠ifisc.uib-csic.es 31 Aug '22

31 Aug '22

Talk on Wednesday Aug 31, 2022 at 15:00 Place: Sala Multiusos, Ed. Cientifíco-Técnico Title: Modelling and synchronization of neuronal populations. Speaker: Claudio Mirasso, IFISC (UIB-CSIC) Abstract: Seminar within the X GEFENOL Summer School on Statistical Physics of Complex Systems Url event:https://ifisc.uib-csic.es/en/events/seminars/modelling-and-synchronization-of-neuronal-populati/

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Reminder: Talk, TODAY - Tuesday, Aug 30, 2022 at 15:00
by semfis＠ifisc.uib-csic.es 30 Aug '22

30 Aug '22

Talk on Tuesday Aug 30, 2022 at 15:00 Place: Sala Multiusos, Ed. Cientifíco-Técnico Title: Pattern Formation in Posidonia Meadows Speaker: Damià Gomila, IFISC (UIB-CSIC) Abstract: Seminar within the X GEFENOL Summer School on Statistical Physics of Complex Systems Url event:https://ifisc.uib-csic.es/en/events/seminars/pattern-formation-in-posidonia-meadows-2/

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Master Thesis on Friday, Sep 02, 2022 at 16:00
by semfis＠ifisc.uib-csic.es 26 Aug '22

26 Aug '22

Master Thesis on Friday Sep 02, 2022 at 16:00 Place: Zoom Seminar Title: Generating functional analysis of Lotka-Volterra equations with Hebbian couplings Speaker: Enrique Rozas García, IFISC Abstract: We study a benchmark model in theoretical ecology for population dynamics, the generalized Lotka-Volterra equations, for the case of random Hebbian couplings. A set of binary traits describes each species in the ecosystem and we assume the interaction between any two species to be stronger the more traits they share. We use the generating functional method to derive an effective process with the same statistical properties as the Lotka-Volterra dynamics. This effective process is then used to study the resulting dynamically evolved communities, the different phases of the system, and the transitions between them. We check the predictions of the theory against numerical simulations. We find that increasing the number of traits leads to reduced community sizes and increases instability. Zoom link:&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Supervisor: Tobias Galla Futher jury members: Emilio Hernandez-Garcia, Raul&nbsp;Toral &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/generating-functional-analysis-of-lotka-volterra-e/

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