June 2022 - semfis - Mailing lists@ IFISC

IFISC Seminar on Wednesday, Jun 22, 2022 at 14:30
by semfis＠ifisc.uib-csic.es 17 Jun '22

17 Jun '22

IFISC Seminar on Wednesday Jun 22, 2022 at 14:30 Place: Zoom Seminar Title: The role of non-conservative interactions in non-equilibrium stochastic systems Speaker: Sarah Loos, DAMTP Cambridge, and ICTP Trieste Abstract: The world surrounding us, including all living matter and various artificial complex systems, mostly operates far from thermal equilibrium. Recently, lively effort is dedicated in the fields of stochastic thermodynamics and statistical physics to unravel the fundamental principles that govern the individual and collective dynamics of such nonequilibrium systems, like the swarming of fish or flocking of birds. However, so far, little attention has been paid to the implications of non-conservative interactions, like time-delayed or non-reciprocal interactions. Such interactions emerge commonly in biological, chemical and feedback systems, and are widespread in engineering and machine learning. In this talk, I will use simple models to discuss technical challenges and unexpected physical phenomena induced by non-reciprocity [1] and time delay [2]. [1] Loos, Klapp, NJP (2020) [2] Loos, Klapp, Sci. Rep. (2019); Holubec, Geiss, Loos, Kroy, Cichos, PRL (2021) https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/the-role-of-non-conservative-interactions-in-non-e/

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Reminder: Talk, TODAY - Thursday, Jun 16, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 16 Jun '22

16 Jun '22

Talk on Thursday Jun 16, 2022 at 11:00 Place: IFISC Seminar Room Title: Hubs-biased advection-diffusion on undirected graphs. Speaker: Manuel Miranda Barrado, IFISC (CSIC-UIB) Abstract: Abstract: In certain real-world scenarios it is important to account for the influence of nearest neighbors on the diffusion of a particle located at a node of an undirected graph. To capture this influence the so-called hubs-biased Laplacians were proposed. We investigated the self-adjoint of these operators and discovered that they correspond to operators describing advective processes, where a degree-based drift pulls the diffusive particle from/towards the hubs. Advection operators were previously defined only for digraphs, where the direction of the edges ruled the drift, but the new operators that we present here act on undirected graphs. In this talk, we will explain how this new advective operators in undirected graphs are constructed, which properties do they have and which is its final configuration. Moreover, we will construct an advection-diffusion equation in which both processes &ldquo;compete&rdquo; in a graph. showing the analytic expression of the steady state of these processes. Finally, we will study how advection-diffusion shapes movement of the species L. catta when the foraging occurs in a patched landscape network in Southern Madagascar. Url event:https://ifisc.uib-csic.es/en/events/seminars/hubs-biased-advection-diffusion-on-undirected-grap/

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IFISC Seminar on Wednesday, Jun 15, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 15 Jun '22

15 Jun '22

IFISC Seminar on Wednesday Jun 15, 2022 at 12:00 Place: IFISC Seminar Room Title: Eco-evolutionary dynamics on networks: From diversification to coexistence in complex ecosystems Speaker: Carlos Melian, Eawag, ETH-Domain Abstract: What is a species? Take the Latitudinal Biodiversity Gradient (LBG). Do the Tropics produce more species? LBG is gone in deep time. Environmental gradients, time and space might be external explanations for diversifying lineages. But lineages strongly differ in diversification rates. Some contain thousands of species while others just a few. What if DNA, development, gene expression, behavior and sexual selection combine with external factors to produce a complex set of interacting layers challenging speciation events? Experimental evolution brings light to the speciation process. Many studies have shown ecological diversification from bacterial communities to eukaryotic taxa. Theoretical speciation models, from population genetics to statistical physics have also shown predictions fitting diversifying lineages. Still, theory and experiments connecting diversification to coexistence remains open. How would the next unifying diversification and biodiversity theory look like?&nbsp; Note the unusual start time, 12:00 noon. The seminar is presential with parallel zoom stream: https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/eco-evolutionary-dynamics-on-networks-from-diversi/

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Reminder: IFISC Seminar, TODAY - Wednesday, Jun 15, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 15 Jun '22

15 Jun '22

IFISC Seminar on Wednesday Jun 15, 2022 at 12:00 Place: IFISC Seminar Room Title: Eco-evolutionary dynamics on networks: From diversification to coexistence in complex ecosystems Speaker: Carlos Melian, Eawag, ETH-Domain Abstract: What is a species? Take the Latitudinal Biodiversity Gradient (LBG). Do the Tropics produce more species? LBG is gone in deep time. Environmental gradients, time and space might be external explanations for diversifying lineages. But lineages strongly differ in diversification rates. Some contain thousands of species while others just a few. What if DNA, development, gene expression, behavior and sexual selection combine with external factors to produce a complex set of interacting layers challenging speciation events? Experimental evolution brings light to the speciation process. Many studies have shown ecological diversification from bacterial communities to eukaryotic taxa. Theoretical speciation models, from population genetics to statistical physics have also shown predictions fitting diversifying lineages. Still, theory and experiments connecting diversification to coexistence remains open. How would the next unifying diversification and biodiversity theory look like?&nbsp; Note the unusual start time, 12:00 noon. The seminar is presential with parallel zoom stream: https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/eco-evolutionary-dynamics-on-networks-from-diversi/

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[SPAM]Tiene un pago pendiente. Debe liquidar su deuda.
by semfis＠ifisc.uib-csic.es 13 Jun '22

13 Jun '22

¡Hola!Desafortunadamente, tengo malas noticias para usted.Hace aproximadamente unos meses conseguí acceder a todos los dispositivos que utiliza para navegar por Internet, y desde entonces he estado observando todas sus actividades en la red.Así es cómo han sucedido los hechos: Hace algún tiempo, les compré a unos hackers el acceso especial a varias cuentas de correo electrónico (hoy en día esto se puede hacer fácilmente a través de Internet).Como es evidente, eso también me permitió poder acceder sin problemas a su cuenta de correo electrónico (semfis(a)ifisc.uib-csic.es).Una semana después, procedí a instalar un virus troyano en los sistemas operativos de todos los dispositivos que utiliza para acceder a su correo electrónico.Lo cierto es que me resultó bastante fácil porque abrió algunos enlaces de los correos electrónicos de su bandeja de entrada.La genialidad está en la sencillez.Gracias a este software, puedo acceder a todos los controladores de sus dispositivos (como la cámara de vídeo, el micrófono, el teclado, etc.).Puedo descargar fácilmente todos sus datos, fotos, historial de navegación, etc. en mis servidores.Puedo acceder a todas sus cuentas de redes sociales, messengers y correo electrónico, así como al historial de chats y las listas de contactos.Mi virus actualiza constantemente sus firmas (ya que está controlado por un controlador), y como resultado pasa desapercibido para el antivirus.Así que a estas alturas ya entenderá por qué nunca me ha detectado hasta recibir este correo...Gracias a la información que he recopilado sobre usted, he descubierto que le encantan los sitios web para adultos y que los visita con frecuencia.Está claro que disfruta mucho navegando por páginas porno y viendo vídeos muy excitantes que le producen una satisfacción inimaginable.Sinceramente, no he podido resistirme a grabar algunas de sus pervertidas sesiones en solitario y las he recopilado en varios vídeos,en los que aparece masturbándose y corriéndose al final.Por si aún duda de mi palabra, debe saber que con solo unos clics de ratón podría distribuir todos esos vídeos a sus compañeros, amigos e incluso familiares.Además, puedo subirlos a Internet para que cualquiera pueda acceder a ellos.Estoy seguro de que lo último que querrá es que ocurra algo así, teniendo en cuenta las cosas tan pervertidas que aparecen en los vídeos que suele ver (seguro que ya me entiende), ya que sería un completo desastre para usted.Sin embargo, podemos solucionarlo de la siguiente manera:Me hará una transferencia de 1390€ (el equivalente en bitcoins según el tipo de cambio en el momento de la transferencia), y cuando reciba la transferencia, eliminaré inmediatamente todos esos vídeos lascivos sin dudarlo.Y después podremos fingir que nada de esto ha sucedido nunca. Además, le garantizo que desactivaré y eliminaré todo el software dañino de todos sus dispositivos. No se preocupe, soy un hombre de palabra.En realidad es un buen trato y por muy poco dinero, sobre todo teniendo en cuenta todo el tiempo que he estado vigilando su perfil y su tráfico.Si todavía no conoce el proceso de compra y transferencia de bitcoins, podrá encontrar toda la información necesaria en Internet.Mi monedero bitcoin es el siguiente: 1YcRyyF4obSGLyh1QJ9jyxv67ksYmM2oc Tiene 48 horas, y la cuenta atrás comienza justo después de abrir este correo electrónico (2 días para ser exactos).No olvide tener en cuenta y abstenerse de hacer lo siguiente:> No intente responder a mi correo electrónico (este correo se ha generado en su bandeja de entrada junto con la dirección de respuesta).> No intente llamar a la policía ni a otros servicios de seguridad. Es más, ni se le ocurra contárselo a sus amigos. Si lo descubro (dadas mis habilidades me resultaría muy fácil, ya que controlo y vigilo todos sus sistemas constantemente), publicaré inmediatamente el vídeo en el que sale haciendo cochinadas. > No intente localizarme, sería completamente inútil. Las transacciones de criptomonedas siempre son anónimas.> No intente reinstalar el sistema operativo de sus dispositivos ni deshacerse de ellos. No tendría sentido, puesto todos sus vídeos privados ya están guardados en servidores remotos.Cosas que pueden preocuparle:> Que yo no reciba el dinero que me ha transferido. Tranquilo, podré rastrear la transferencia en cuanto la haga, ya que monitorizo incesantemente todas sus actividades (mi virus troyano puede controlar remotamente todos los procesos, igual que TeamViewer).> Que siga distribuyendo sus vídeos después de haberme enviado el dinero. Créame, no me interesa seguir causándole molestias una vez que reciba el dinero. Además, si esa fuera mi intención, ¡lo habría hecho hace mucho tiempo! ¡Solucionaremos esto de manera justa!Un último consejo de mi parte... En adelante, ¡asegúrese de no volver a verse envuelto en este tipo de incidentes!Le recomiendo que cambie todas sus contraseñas tan a menudo como sea posible.

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Talk on Thursday, Jun 16, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 10 Jun '22

10 Jun '22

Talk on Thursday Jun 16, 2022 at 11:00 Place: IFISC Seminar Room Title: Hubs-biased advection-diffusion on undirected graphs. Speaker: Manuel Miranda Barrado, IFISC (CSIC-UIB) Abstract: Abstract: In certain real-world scenarios it is important to account for the influence of nearest neighbors on the diffusion of a particle located at a node of an undirected graph. To capture this influence the so-called hubs-biased Laplacians were proposed. We investigated the self-adjoint of these operators and discovered that they correspond to operators describing advective processes, where a degree-based drift pulls the diffusive particle from/towards the hubs. Advection operators were previously defined only for digraphs, where the direction of the edges ruled the drift, but the new operators that we present here act on undirected graphs. In this talk, we will explain how this new advective operators in undirected graphs are constructed, which properties do they have and which is its final configuration. Moreover, we will construct an advection-diffusion equation in which both processes &ldquo;compete&rdquo; in a graph. showing the analytic expression of the steady state of these processes. Finally, we will study how advection-diffusion shapes movement of the species L. catta when the foraging occurs in a patched landscape network in Southern Madagascar. Url event:https://ifisc.uib-csic.es/en/events/seminars/hubs-biased-advection-diffusion-on-undirected-grap/

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Reminder: Talk, TODAY - Friday, Jun 10, 2022 at 11:00
by semfis＠ifisc.uib-csic.es 10 Jun '22

10 Jun '22

Talk on Friday Jun 10, 2022 at 11:00 Place: IFISC Seminar Room Title: The process of doing a PhD - lessons learned from being a student and a supervisor Speaker: Tobias Galla, IFISC Abstract: This is a bit of an experiment. At the beginning of the session, I will summarise some of the lessons I learned during my own time as a PhD student, and then later as a supervisor,&nbsp;about the process of doing a PhD. This is about the different stages of a PhD, the role of the supervisor and of the student in these stages, about frustration along the way, and why it is normal to struggle. This is based on these notes here:&nbsp;<a dir="ltr" href="https://t.co/5xQ3q60CBj" rel="noopener noreferrer" target="_blank">https://bit.ly/3HhSpHu</a> Hopefully this will then trigger some discussion, and members of the audience can perhaps contribute from their own experience (both students and supervisors). The meeting&nbsp;is meant to be interactive.&nbsp;I will try my best to avoid the impression that I have all the answers and that I know&nbsp;`how do to a PhD&#39;. Of course I don&#39;t, and of course everything&nbsp;I will say is highly biased by my own experiences, and won&#39;t&nbsp;apply to everyone.&nbsp;Nevertheless, I think it is useful to have a discussion of this type.&nbsp;I hope that this&nbsp;will be interesting and helpful for students and supervisors. Presential&nbsp;in the seminar room, with parallel Zoom&nbsp;stream:&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/the-process-of-doing-a-phd-lessons-learned-from-be/

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Reminder: IFISC Seminar, TODAY - Wednesday, Jun 08, 2022 at 14:30
by semfis＠ifisc.uib-csic.es 08 Jun '22

08 Jun '22

IFISC Seminar on Wednesday Jun 08, 2022 at 14:30 Place: IFISC Seminar Room Title: Beating Carnot efficiency with periodically driven chiral conductors Speaker: Sungguen Ryu, IFISC Abstract: Classically, the power generated by an ideal thermal machine cannot be larger than the Carnot limit. This profound result is rooted in the second law of thermodynamics. A hot question is whether this bound is still valid for microengines operating far from equilibrium. Here, we demonstrate that a quantum chiral conductor driven by AC voltage can indeed work with efficiencies much larger than the Carnot bound. The system also extracts work from common temperature baths, violating Kelvin-Planck statement. Nonetheless, with the proper definition, entropy production is always positive and the second law is preserved. The crucial ingredients to obtain efficiencies beyond the Carnot limit are: i) irreversible entropy production by the photoassisted excitation processes due to the AC field and ii) absence of power injection thanks to chirality. Our results are relevant in view of recent developments that use small conductors to test the fundamental limits of thermodynamic engines. Reference: Sungguen Ryu, Rosa L&oacute;pez, Lloren&ccedil; Serra &amp; David S&aacute;nchez&nbsp;Nature Communications volume 13, Article number: 2512 (2022)&nbsp; Presential seminar in the seminar room, with parallel Zoom stream:&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/beating-carnot-efficiency-with-periodically-driven/

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Reminder: Master Thesis, TODAY - Tuesday, Jun 07, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 07 Jun '22

07 Jun '22

Master Thesis on Tuesday Jun 07, 2022 at 12:00 Place: IFISC Meeting Room Title: Quantifying mobility responses to COVID-19 containment strategies in Spain Speaker: Mar Cuevas Blanco, IFISC (CSIC-UIB) Abstract: The onset of COVID-19 in late 2019 had a wide and profound effects on our lives. Some of the outstanding impacts of the pandemic are on the way people interact and travel. In response to the sanitary crisis, many countries have implemented containment policies that have proven effectiveness in controlling and mitigating the spread of the disease. However, the increase in the frequency of epidemics observed in recent years, underlines the importance of knowledge on the effects that restrictive policies on human mobility have on epidemic spreading. This is useful not only for understanding and predicting the dynamics of COVID-19 infection, but it is rather essential to better cope with similar scenarios in the future. The purpose of this Master&rsquo;s Thesis is to assess how the human mobility network, on a country-wide basis, has evolved in response to restrictive measures and how these changes affect the ability of the network to support diffusion. For that purpose, we use movement data, of mobile phone users, that account for the number of trips between each pair of locations in Germany and Spain. In Germany, we focus on the first outbreak, while in Spain, we extend the coverage period to more than a year later, allowing us to identify long-lasting changes. The study of mobility patterns in both countries showed that traffic was effectively reduced&hellip;&nbsp; &nbsp; Advisor: Sandro Meloni Jury: Maxi San Miguel, Pere Colet, Sandro Meloni Url event:https://ifisc.uib-csic.es/en/events/seminars/quantifying-mobility-responses-to-covid-19-contain/

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Master Thesis on Tuesday, Jun 07, 2022 at 12:00
by semfis＠ifisc.uib-csic.es 03 Jun '22

03 Jun '22

Master Thesis on Tuesday Jun 07, 2022 at 12:00 Place: IFISC Meeting Room Title: Quantifying mobility responses to COVID-19 containment strategies in Spain Speaker: Mar Cuevas Blanco, IFISC (CSIC-UIB) Abstract: TBA&nbsp; &nbsp; Advisor: Sandro Meloni Jury: Maxi San Miguel, Pere Colet, Sandro Meloni Url event:https://ifisc.uib-csic.es/en/events/seminars/quantifying-mobility-responses-to-covid-19-contain/

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