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        "datetime_modified":"20260114T211002",
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        "date_end":"2026-02-27",
        "time_start":"15:00:00",
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        "time_zone":"America\/Detroit",
        "event_title":"AIM Seminar:  Optimal scalar and vector transport using branching flows",
        "occurrence_title":"",
        "combined_title":"AIM Seminar:  Optimal scalar and vector transport using branching flows: Anuj Kumar (UC Davis)",
        "event_subtitle":"Anuj Kumar (UC Davis)",
        "event_type":"Lecture \/ Discussion",
        "event_type_id":"13",
        "description":"Abstract:  We are interested in the design of forcing in the Navier\u2013Stokes equation such that the resultant flow maximizes the heat transfer between two differentially heated walls for a given power supply budget. Previous work established that heat transport cannot scale faster than 1\/3-power of the power supply. We present a novel construction of three dimensional \"branching pipe flows\" for which we show the sharpness of the upper bound. After carefully examining these designs, we extract the underlying physical mechanism that makes the branching flows \"efficient,\" based on which we present a design of mechanical apparatus that, in principle, can achieve the best possible case scenario of heat transfer. In the latter part of the talk, we extend this approach to transport of a divergence-free vector. We present branching flow designs that achieve a momentum transport scaling (in Reynolds number) that aligns precisely with that of turbulent flow in a channel.\r\n\r\nContact:  Ian Tobasco",
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        "room":"1084",
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        "tags":["Mathematics"],
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                "group_name":"Applied Interdisciplinary Mathematics (AIM) Seminar - Department of Mathematics",
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    {
        "datetime_modified":"20260220T124737",
        "datetime_start":"20260227T150000",
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        "has_end_time":1,
        "date_start":"2026-02-27",
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        "time_zone":"America\/Detroit",
        "event_title":"HET Seminar | The String Landscape, precisely",
        "occurrence_title":"",
        "combined_title":"HET Seminar | The String Landscape, precisely: Jakob Moritz (University of Wisconsin)",
        "event_subtitle":"Jakob Moritz (University of Wisconsin)",
        "event_type":"Lecture \/ Discussion",
        "event_type_id":"13",
        "description":"Compactifications of higher dimensional string theories offer perhaps the most promising ``top-down\u2019\u2019 path toward realistic models of our universe. In the way stands the notorious difficulty of computing the 4d effective action beyond tree level, and a lack of concrete embeddings of Standard Model-like physics with a sufficiently long lived vacuum. In this talk, after reviewing the current status of such compactifications (the \u201cstring landscape\u201d), I will present recent and ongoing works aimed at these problems. Concretely, I will discuss work on string dualities that can be used as a tool to evaluate certain quantum corrections in flux compactifications, as well as upcoming work featuring new ensembles of top-down Standard Model constructions using type IIB string theory. Finally, I\u2019ll report on progress in evaluating the classical superpotential in type IIB compactifications on Calabi-Yau orientifolds.\n\nBased on works with Federico Compagnin, Jim Halverson, Bj\u00f6rn Hassfeld, and Elijah Sheridan",
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                "guid":"145154-21896740@events.umich.edu",
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        "tags":["Talk","Seminar","Science","Physics","High Energy Theory Seminar"],
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                "group_name":"Leinweber Institute for Theoretical Physics",
                "group_id":"4286",
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                "group_name":"Department of Physics",
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