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DTSTART;TZID=Europe/Berlin:20201203T160000
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SUMMARY:Naomi Leonard\, Princeton University (hosted by Jörg Raisch): Opinion Dynamics with Tunable Sensitivity:  Consensus\, Dissensus\, and Cascades
DESCRIPTION:I will present a model of continuous-time opinion dynamics for an arbitrary number of agents that communicate over a network and form real-valued opinions about an arbitrary number of options.  The model generalizes linear and nonlinear models in the literature. Drawing from biology\, physics\, and social psychology\, we introduce an attention parameter to modulate social influence and a saturation function to bound inter-agent and intra-agent opinion exchanges.  This yields simply parameterized dynamics that exhibit the range of opinion formation behaviors predicted by model-independent bifurcation theory but not exhibited by linear models or existing nonlinear models. Behaviors include reliable formation of consensus and dissensus\, even in homogeneous networks\, and opinion cascades. The opinion dynamics also display ultra-sensitivity to inputs\, robustness to disturbance\, and flexible transitions between consensus and dissensus. Augmenting the opinion dynamics with feedback dynamics for the attention parameter results in tunable thresholds that govern sensitivity\, robustness\, and flexibility.  The model provides new means for systematic study of dynamics on natural and engineered networks\, from information spread and political polarization to collective decision making and dynamic task allocation. This is joint work with Alessio Franci (UNAM\, Mexico) and Anastasia Bizyaeva (Princeton). \nNaomi Ehrich Leonard is a control theorist whose work involves analysis and design of feedback and interconnection in complex\, dynamical systems.  She uses mathematical models and methods to study mechanisms of collective motion and collective decision making for multi-agent systems in nature (analysis of animal and human groups) and in engineering (design of autonomous robotic teams and mobile sensor networks).  She has applied her work to the collective dynamics of killifish\, starlings\, honeybees\, zebras\, and desert harvester ants\, as well as to rule-based improvisational dance.  She led a multidisciplinary ocean sensing project with a month-long deployment of an automated\, adaptive network of underwater robotic vehicles in Monterey Bay\, CA.  Leonard is the Edwin S. Wilsey Professor of Mechanical and Aerospace Engineering and associated faculty member of the Program in Applied and Computational Mathematics at Princeton University.  She is a MacArthur Fellow\, a Fellow of the American Academy of Arts and Sciences\, IEEE\, SIAM\, ASME\, and IFAC. Visit her website here. \nThe Zoom Link will be sent the day before the lecture. (Contact communication@scioi.de for specific questions)
URL:https://www.scienceofintelligence.de/event/distinguished-speaker-series-naomi-leonard-princeton-university-hosted-by-jorg-raisch/
CATEGORIES:Distinguished Speaker Series
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DTSTART;TZID=Europe/Berlin:20201217T163000
DTEND;TZID=Europe/Berlin:20201217T183000
DTSTAMP:20260425T124307
CREATED:20200309T121316Z
LAST-MODIFIED:20240417T125500Z
UID:7256-1608222600-1608229800@www.scienceofintelligence.de
SUMMARY:Patricia Churchland (University of California\, San Diego)\, The Neurobiological Platform for Moral Intuitions
DESCRIPTION:ABSTRACT: Self-preservation is embodied in our brain’s circuitry: we seek food when hungry\, warmth when cold\, and mates when lusty. In the evolution of the mammalian brain\, circuitry for regulating one’s own survival and well-being was modified. For sociality\, the important result was that the ambit of me extends to include others — me-and-mine. Offspring\, mates\, and kin came to be embraced in the sphere of  me-ness; we nurture them\, fight off threats to them\, keep them warm and safe. The brain knows these others are not me\, but if I am attached to them\, their plight fires-up caring circuitry\, motivating other-care that resembles self-care. In some species\, including humans\, seeing to the well-being of others may extend\, though less intensely\, to include friends\, business contacts or even strangers\, in an ever-widening circle. Oxytocin\, an ancient body-and-brain molecule\, is at the hub of the intricate neural adaptations sustaining mammalian sociality. Not acting alone\, oxytocin works with other hormones and neurotransmitters and structural adaptations. Among its many roles\, oxytocin decreases the stress response\, making possible the friendly\, trusting interactions typical of life in social mammals. I can let my guard down when I know I am among trusted family and friends. \n  \nBIO: For decades\, Patricia Churchland has contributed to the fields of philosophy of neuroscience\, philosophy of the mind and neuroethics. Her research has centered on the interface between neuroscience and philosophy with a current focus on the association of morality and the social brain. A Professor Emeritus of Philosophy at the University of California\, San Diego and Adjunct Professor at the Salk Institute\, Pat holds degrees from Oxford University\, the University of Pittsburg and the University of British Columbia. She has been awarded the MacArthur Prize\, The Rossi Prize for Neuroscience and the Prose Prize for Science. She has authored multiple pioneering books\, her most recent being Touching a Nerve. She has served as President of the American Philosophical Association and the Society for Philosophy and Psychology. Pat lives in Solana Beach\, California\, with her husband Paul\, a neurophilosopher\, and their labradoodle Millie. They have two children\, Anne and Mark\, both neuroscientists. Read more about her work on her website.\nPatricia Churchland is also a member of SCIoI’s Scientific Advisory Board.
URL:https://www.scienceofintelligence.de/event/distinguished-people-series-talia-konkle-host-martin-rolfs/
LOCATION:On ZOOM (Contact us for Link)
CATEGORIES:Distinguished Speaker Series
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