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DTSTAMP:20260203T090856
DTSTART;TZID=America/Detroit:20260203T113000
DTEND;TZID=America/Detroit:20260203T130000
SUMMARY:Workshop / Seminar:Energy landscape analysis of multivariate time series via the Ising model | Winter Seminar Series
DESCRIPTION:I present energy landscape analysis for multivariate time series. We infer an effective energy landscape from the data by fitting the inverse Ising model (also called a Boltzmann machine and pairwise maximum entropy model) and represent each observed system state as the position of a \"ball\" constrained to move on that surface. From the estimated landscape we compute\, statistical-physics‑inspired indices\, such as basin structure\, barrier heights\, dwell times\, transition rates\, and susceptibilities\, to characterize collective organization\, metastability\, and transition dynamics in the original time series. I illustrate the approach with neuroimaging examples in health and disease.
UID:143615-21893556@events.umich.edu
URL:https://events.umich.edu/event/143615
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Agent Based Modelling,Complex Systems,Complex Systems Modelling,Mathematics,Network Science,Networks,Physics,seminar,Statistical Physics,Statistics
LOCATION:Weiser Hall - 747
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260112T113742
DTSTART;TZID=America/Detroit:20260203T113000
DTEND;TZID=America/Detroit:20260203T125000
SUMMARY:Workshop / Seminar:Transition to Green Technology along the Supply Chain
DESCRIPTION:We analyze a model of green technological transition along a supply chain. The model generates a unique equilibrium for given initial conditions but multiple steady- states. We show that: (i) even in the presence of Pigouvian environmental taxation\, targeted sectoral subsidies are generally necessary to implement the social optimum\; (ii) small\, targeted industrial policy may bring large welfare gains\; (iii) a government which is unable to subsidize greenification in more than one sector or price carbon at its true social cost should primarily target downstream sectors\; (iv) overinvesting in greenification in the wrong upstream branch may derail the overall transition towards greenification. Finally\, we calibrate our model to decarbonization of heavy duty transportation (trucking\, aviation\, etc.) via hydrogen. We find that\, absent industrial policy\, the economy can get stuck in the “wrong” steady-state with CO2 emissions vastly above the social optimum even with a Pigouvian carbon price in place.
UID:143290-21892647@events.umich.edu
URL:https://events.umich.edu/event/143290
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Economics,seminar,Macroeconomics
LOCATION:North Quad - 4325
CONTACT:
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