Division of Applied Mathematics

Seminars for Feb 21 - Feb 25, 2005

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• Tuesday, February 22, 2005
  
  

  Center For Fluid Mechanics And
  The Fluids, Thermal And Chemical Processes Group
  Of The Division Of Engineering Seminar Series

  Speaker:	Professor Boris Khusid, New Jersey Institute of Technology, University Height, Newark, NJ
  Title:	Electric-field-driven Control and Manipulation of Particles in Micro- and Nano-fluidics
  Time/Place:	4:00 p.m., Barus and Holley, Room 190

  Abstract:   Compared to other available methods, the use of electric fields is particularly well-suited for the manipulation of minute particles in micro- and nano-devices. We present recent results of our experimental and theoretical studies of collective phenomena which affect the suspension flow in a micro-channel due to its small dimensions. Next, we consider the molecular dynamics simulations of the motion of a single particle through a fluid-filled nano-channel and examine to which extent continuum mechanics can predict the particle motion.

• Wednesday, February 23, 2005
  
  

  Special Department of Mathematics Colloquium

  Speaker:	Vadim Kaloshin, Caltech
  Title:	Variational Construction of Solutions of Planar Circular Restricted 3-body Problem
  Time/Place:	4:00 p.m., B&H 190

• Thursday, February 24, 2005
  
  

  Stochastic Systems Seminar

  Speaker:	Ali Devin Sezer, Brown University, Division of Applied Mathematics, Ph.D. Student
  Title:	Dynamic Importance Sampling for Queuing Networks
  Time/Place:	4:30 pm, B&H 155 PLEASE NOTE SPECIAL DAY, TIME, AMD ROOM FOR THIS WEEK ONLY!

  Abstract:   In the research that is the subject of my talk, we constructed IS schemes for the estimation of excessive backlogs of tandem queues using a game approach to IS and proved their near asymptotic optimality. The construction of these schemes is based on the subsolutions of the associated Isaacs equation.

  Excessive backlog of two tandem queues is the simplest estimation problem in the context of IS for queuing networks and had been studied extensively with limited progress. In particular, the problem lacked a well behaving IS scheme for a certain range of parameters of the system (the service and arrival rates). The schemes we develop are general in the sense that they are nearly asymptotically optimal for all meaningful values that the parameters of the system can take. They are easy to implement as well.

  Asymptotic obtimality is, obviously, an asymptotic property. However, when conducting simulations, one is always interested in prelimit quantitities. Time permitting, I would like to discuss some issues that relate to the implementation and the prelimit performance of the developed algorithms.

• Friday, February 25, 2005
  
  

  Scientific Computing Seminar

  Speaker:

  Alexander Kurganov, Tulane University THIS TALK HAS JUST BEEN CANCELLED!

  Graduate Student Pizza Seminar

  Speaker:	Ali Devin Sezer, Brown University, Division of Applied Mathematics
  Title:	Dynamic Importance Sampling for Queuing Networks
  Time/Place:	1:15 p.m., 182 George Street, Room 110

  PDE Seminar

  Speaker:	Vera Mikyoung Hur, Brown University
  Title:	Rotational Stokes Waves: Construction via Degree/Bifurcation Theory
  Time/Place:	3:00 p.m., Kassar 105

  Department of Mathematics Colloquium

  Speaker:	Janos Kollar, Princeton University
  Title:	Einstein Metrics on Spheres
  Time/Place:	4:30 p.m., B&H 190

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