[Sem-coll] Applied Math Colloquium & Seminars Jan 26-30

Joe Millham jmillhamiit at gmail.com
Thu Jan 22 16:50:45 CST 2009


Greetings everyone,
Please join the IIT Applied Math Department for the following
Colloquium and Seminars.  All are welcome to attend, and refreshments
will be served at some gatherings.

Monday, January 26
Department Colloquium
H. Larry Scott, IIT Physics
"Modeling the Lateral Organization of Lipid Membranes of Atomistic
Simulations to Mean Field Theory"
E1 106  4:40 pm
Refreshments will be available in E1 112 at 4:20 to prepare for the Colloquium
See abstract below
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Wednesday, January 28
Department Colloquium
Pall Melsted,  Carnegie Mellon University
"Random Walks for Cuckoo Hashing"
E1 106   4:40 pm
Refreshments will be available in E1 112 at 4:20 to prepare for the Colloquium
See abstract below
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Monday, January 26
Stochastics and Multiscale Modeling Seminar
Jiarui Yang, IIT Applied Math Graduate Student
"Quantifying Model Uncertainties in Nonlinear Dynamical Systems"
E1 129    11:25 am
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Wednesday, January 28
Meshfree Methods Seminar
Discussion of Possible Research Directions for the Semester
E1   025    11:30 am
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Monday, January 26
Department Colloquium
H. Larry Scott, IIT Physics
"Modeling the Lateral Organization of Lipid Membranes of Atomistic
Simulations to Mean Field Theory"
Abstract:

This talk will describe computer modeling aimed at providing insights
into the existence, structure, size, and thermodynamic stability of
localized domains in multicomponent biological membranes.  Modeling
the lateral organization within a membrane is problematic due to the
relatively slow lateral diffusion rate for lipid molecules so that
microsecond or longer time scales are needed.

 Although atomistic simulations currently are not able to reach this
scale, they can provide data on the intermolecular forces and
correlations that are involved in lateral organization. These data can
be used to parameterize coarse grained models that can reach the time
scales needed for predictions of lateral organization in membranes. In
this talk, I will summarize our modeling efforts in this area of
biological physics.
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Wednesday, January 28
Department Colloquium
Pall Melsted,  Carnegie Mellon University
"Random Walks for Cuckoo Hashing"
A Dictionary is a fundamental data structure in computer science, that
provides a mapping from keys to elements. One implementation is the
d-ary Cuckoo Hashing Table, which uses d hash functions and guarantees
that each key present be stored in one of the locations it hashes to.
Cuckoo hashing is known to have good space efficiency and worst case
access time, but insertion of items into the table is harder. A depth
first search tree algorithm is known to take expected constant time,
but its worst case performance can be polynomial. Most practical
implementations use a random walk heuristic to insert items, which is
known to work well in practice but previous to this work no
theoretical bounds were known. We present an analysis of the random
walk heuristic by analyzying matchings in random graphs, and show it
runs in expected and worst case polylogarithmic time. The talk will be
accessible a general math audience and no prior knowledge of data
structures is necessary.
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See you there!

Joe Millham
Administrative Assistant
Department of Applied Mathematics
Illinois Institute of Technology
Engineering-1 Room 208
10 W. 32rd St.
Chicago IL 60616
312.567.8984 (Phone)
312.567.3135 (Fax)



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