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  • Nov
    18

    Large-scale distributed synchronization systems, using a cancel-on-completion redundancy mechanism

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM L440, Technological Institute

    EVENT DETAILSmore info

    Alexander Stolyar (UIUC)

    Abstract: We consider a class of multi-agent distributed synchronization systems, which are modeled as n particles moving on the real line. This class generalizes the model of a multi-server queueing system, employing so-called cancel-on-completion (c.o.c.) redundancy mechanism, but is motivated by other applications as well. The queueing model can be viewed as a particle system, regulated at the left boundary point. The more general model is such that we allow regulation boundaries on either side, or both sides, or no regulation at all. We consider the mean-field asymptotic regime, where the number of particles n and the job arrival rates go to infinity, while the job arrival rates per particle remain constant. The system state for a given n is the empirical distribution of the particles' locations. The results include: the existence/uniqueness of fixed points of mean-field limits (ML), which describe the limiting dynamics of the system; conditions for the steady-state asymptotic independence (concentration of the stationary distribution on an ML fixed point); the limits of the average velocity at which unregulated (free) particle system advances. Our technical approach is such that the systems with different types of regulation are analyzed within a unified framework.

    Bio. Since 2017 Alexander Stolyar is a Professor in the ISE Department and Coordinated Science Lab at UIUC. His research interests are in stochastic processes, queueing theory, and stochastic modeling of information, communication, service and supply chain systems. He received Ph.D. in Mathematics from the Institute of Control Science, Moscow, in 1989, and was a research scientist at the Institute of Control Science in 1989-1991. In 1992-1998 he was working on stochastic models in telecommunications at Motorola and AT&T Research. From 1998 to 2014 he was with the Bell Labs Mathematical Sciences Research, Murray Hill, New Jersey, working on stochastic networks and resource allocation problems in a variety of applications, including wireless and wireline communications, service systems, network clouds. In 2014-2016 he was a Professor in the ISE Department at Lehigh University. He is an INFORMS Fellow, and received INFORMS Applied Probability Society 2004 Best Publication award and SIGMETRICS'96 Best Paper award.

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    TIME Tuesday, November 18, 2025 at 11:00 AM - 12:00 PM

    LOCATION L440, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Dec
    11

    MLDS Online Information Session

    Master of Science in Machine Learning and Data Science (MLDS)

    10:00 AM

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    TIME Thursday, December 11, 2025 at 10:00 AM - 11:00 AM

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    CONTACT Master of Science in Machine Learning and Data Science Program    mlds@northwestern.edu EMAIL

    CALENDAR Master of Science in Machine Learning and Data Science (MLDS)

  • Dec
    13

    Northwestern Engineering PhD Hooding and Master's Recognition Ceremony

    McCormick School of Engineering and Applied Science

    4:00 PM Pick-Staiger Concert Hall

    EVENT DETAILS

    TIME Saturday, December 13, 2025 at 4:00 PM - 6:00 PM

    LOCATION Pick-Staiger Concert Hall    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Jan
    27

    IEMS Seminar 1/27 Bryon Aragam Winter 2026

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM TBD, Technological Institute

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    TIME Tuesday, January 27, 2026 at 11:00 AM - 12:00 PM

    LOCATION TBD, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Feb
    3

    IEMS Seminar 02/03 Kibaek Kim Winter 2026

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM TBD, Technological Institute

    EVENT DETAILSmore info

    TIME Tuesday, February 3, 2026 at 11:00 AM - 12:00 PM

    LOCATION TBD, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Feb
    10

    IEMS Seminar 2/10 Feng Ruan Winter 2026

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM TBD, Technological Institute

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    TIME Tuesday, February 10, 2026 at 11:00 AM - 12:00 PM

    LOCATION TBD, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Mar
    3

    IEMS Seminar 03/03 Shane Henderson Winter 2026

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM TBD, Technological Institute

    EVENT DETAILSmore info

    TIME Tuesday, March 3, 2026 at 11:00 AM - 12:00 PM

    LOCATION TBD, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Mar
    10

    IEMS Seminar 3/10 Nabarun Deb Winter 2026

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM TBD, Technological Institute

    EVENT DETAILSmore info

    TIME Tuesday, March 10, 2026 at 11:00 AM - 12:00 PM

    LOCATION TBD, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)