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| August 27, 2012
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| 3:30 PM |
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| Speaker | Isabel Darcy
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| Title | Condensin-bound DNA
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| Room |
110 MLH
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| September 3, 2012 (Labor Day)
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| 3:30 PM |
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| Speaker | -
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| Title | -
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| Room | -
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| September 10, 2012
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| 3:30 PM |
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| Speaker | Keith Stroyan
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| Title | The Empirical Motion/Pursuit Law
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| Room |
110 MLH
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| September 17, 2012
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| 3:30 PM |
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| Speaker | Mary Therese Padberg
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| Title | TBA
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| Room |
110 MLH
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| September 24, 2012
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| 3:30 PM |
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| Speaker | cancelled
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| Title |
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| Room |
110 MLH
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| October 1, 2012 (Invited Speaker)
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| 3:30 PM |
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| Speaker | Anne J. Shiu (L.E. Dickson Instructor and NSF Postdoc Department of Mathematics at the University of Chicago)
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| Title | Chemical reaction systems with toric steady states
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| Abstract: |
Chemical reaction networks taken with mass-action kinetics are
dynamical systems governed by polynomial differential equations that
arise in systems biology. In general, establishing the existence of
(multiple) steady states is challenging, as it requires the solution
of a large system of polynomials with unknown coefficients. If,
however, the steady state ideal of the system is a binomial ideal,
then we show that these questions can be answered easily. This talk
focuses on systems with this property, and we say such systems have
toric steady states. Our main result gives sufficient conditions for
a chemical reaction system to admit toric steady states. Furthermore,
we analyze the capacity of such a system to exhibit multiple steady
states. An important application concerns the biochemical reaction
networks networks that describe the multisite phosphorylation of a
protein by a kinase/phosphatase pair in a sequential and distributive
mechanism. No prior knowledge of chemical reaction network theory or
binomial ideals will be assumed. (This is joint work with Carsten Conradi, Mercedes Pérez Millán, and Alicia Dickenstein.)
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| Room |
110 MLH
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| October 3, 2012 (Colloquium Speaker)
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| 3:30 PM |
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| Speaker | Suncica Canic (Cullen Distinguished Professor of Mathematics, Director of the Center for the Mathematical Bioscience, University of Houston)
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| Title | Fluid-Structure Interaction in Blood Flow: Modeling, Analysis, and Numerical Simulation
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| Abstract: |
Mathematical modeling, analysis and numerical simulation, combined with imaging and experimental validation, provide powerful tools for studying cardiovascular physiology and pathology. From the mathematics point of view, studying the interaction between blood flow and vascular tissue (fluid-structure interaction, FSI) is particularly complicated due to the multi-physics and multi-scale nature of the problem. Additionally, since the density of cardiovascular tissue is roughly equal to that of blood, classical loosely-coupled FSI numerical methods, which work well in aero-elasticity, are known to be intrinsically unstable in hemodynamics. This is due to the highly nonlinear coupling between the fluid and structure of equal densities. In this talk, the speaker will review the main issues related to the analysis and numerical simulation of fluid-structure interaction (FSI) problems in hemodynamics, and present some most recent results in this area. The results will include the proof of the existence of a solution to a benchmark problem in FSI in blood flow, and the design of a novel loosely-coupled FSI scheme, which is unconditionally stable for the blood flow application.(Results presented in this talk have been obtained together with graduate student M. Bukac, post-doc B. Muha, and Profs. R. Glowinski and A. Quaini.)
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| Room |
213 MLH
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| October 3, 2012 (Third Annual Rockwell Lecture)
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| 7:30 PM |
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| Speaker | Suncica Canic (Cullen Distinguished Professor of Mathematics, Director of the Center for the Mathematical Bioscience, University of Houston)
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| Title | What do cardiovascular stents, the World Trade Center, and carbon nano-tubes have in common?
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| Abstract: |
From local to global, and from simple to complex, mathematics can uncover the global properties of complex structures that emerge from the local properties of each component, and from the manner in which local components are composed to form the global topological structure. These emergent global properties of complex net-like structures have recently been used in the design new cardiovascular stents. Stents are used in the treatment of coronary artery disease and in heart valve replacement. Coronary artery disease is a precursor for heart attack, the number one cause of death in the US. The speaker will show how mathematical hyperbolic net theory can be used to understand a wide spectrum of real-life net and network problems, including the application to cardiovascular interventions involving the use of mesh-like stents for the treatment of coronary artery disease.
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| Room |
Lecture Room 1, Van Allen Hall, University of Iowa
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| October 8, 2012
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| 3:30 PM |
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| Speaker | Chenhong Zhu
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| Title | Insight to heart failure using two minimal Ca2+ models
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| Room |
110 MLH
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| October 11, 2012 (Colloquium Speaker)
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| 3:30 PM |
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| Speaker | Peter Latham (Gatsby Computational Neuroscience Unit, University College London, UK)
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| Title | Olfaction as probabilistic inference
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| Abstract: |
Inferring what odors are in the air is a hard problem, for at least two reasons: the number of odorant receptor neurons (the first neurons in the olfactory pathway) is smaller than the number of possible odors, and multiple odors can be present at once. Consequently, even if there is a simple mapping from odors to odorant receptor neurons that mapping cannot be uniquely inverted. Presumably, the brain solves this problem by computing the probability that any particular odor is present. We present an inference algorithm that does this, discuss how it maps onto olfactory circuitry, and comment on what we learn about sensory processing in general.
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| Room |
213 MLH
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| October 15, 2012
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| 3:30 PM |
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| Speaker | cancelled
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| Title |
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| Room |
110 MLH
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| October 22, 2012
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| 3:30 PM |
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| Speaker | Garrett Jones
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| Title | Tangles and Knotted Proteins
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| Room |
110 MLH
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| October 29, 2012
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| 3:30 PM |
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| Speaker | cancelled
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| Title |
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| Room |
110 MLH
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| November 5, 2012
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| 3:30 PM |
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| Speaker | Annette Honken
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| Title | Network topology as a source of biological information
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| Room | 110 MLH
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| November 12, 2012
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| 3:30 PM |
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| Speaker | Michael Covello
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| Title | The impact of of sexually abstaining groups on persistence of sexually transmitted infections in populations with ephemeral pair bonds
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| Room |
110 MLH
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| November 19, 2012 (Thanksgiving Week - no seminar)
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| 3:30 PM |
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| Speaker | -
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| Title | -
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| Room | -
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| November 26, 2012
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| 3:30 PM |
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| Speaker | Gabriela Hamerlinck
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| Title | Can Preadaptations predict the outcomes of parasitoid competition in novel habitats
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| Room | 110 MLH
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| December 3, 2012
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| 3:30 PM |
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| Speaker | Guanyu Wang
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| Title | Table of 2-string tangles and distances between knots
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| Room |
110 MLH
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