[CCICADA-announce] DIMACS/CCICADA Interdisciplinary Seminar Series - Upcoming Seminars

[Linda Casals]

    DIMACS/CCICADA Interdisciplinary Seminar Series Presents
               
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Title: On a recent impossibility result for judgment aggregations

Speaker: Branden Fitelson, Rutgers University

Date: Monday, November 1, 2010 12:00 - 1:00 pm

Location: DIMACS Center, CoRE Bldg, Room 431, Rutgers University, 
                  Busch Campus, Piscataway, NJ
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Abstract:

Recently, Cariani et al have reported a fascinating new impossibility
theorem for judgment aggregation. In this talk, I will provide the
background necessary to understand this new result, and I will try to
explain how it is related to other, similar results in contemporary
logic and philosophy of science.

Branden Fitelson is a Professor in the Philosophy Department at
Rutgers University. He was formerly a Professor at Berkeley in the
Philosophy, Cognitive Science and Logic Group. His main areas of
interest are probability and inductive inference, logic and
reasoning. 


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Title: Multi-restricted numbers and Multi-restrained Stirling numbers

Speaker: Ji Young Choi, DIMACS Visiting Researcher

Date: Monday, November 8, 2010 12:00 - 1:00 pm

Location: DIMACS Center, CoRE Bldg, Room 431, Rutgers University, 
                      Busch Campus, Piscataway, NJ
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Abstract:

Given a positive integer m and nonnegative integers n and k, the
(n,k)-th m-restricted Stirling number of the second kind is the number
of partitions of an n-set with k nonempty subsets of size less than or
equal to m, and the (n,k)-th m-restrained Stirling number of the first
kind is the number of permutations of an n-set with k disjoint cycles
of length less than or equal to m. In this talk, their explicit
formulae, recurrence relations, generating functions, and one way to
extend the numbers for negative integer n and k will be presented.

Bio:

Ji Young was born in Busan, Korea, and came to the states for graduate
school where she earned her Ph. D. in Mathematics at Iowa State
University in 2002 with the thesis: Multi-restricted numbers and
powers of permutation representations, supervised by Dr. Jonathan
D. H. Smith. Ji Young is an associate professor in the Department of
Mathematics at Shippensburg University of Pennsylvania and currently
she is on sabbatical as a DIMACS visiting researcher. Her research
interests include topics in Algebra and Combinatorics. 

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Title: Interactive Model Learning from High-Dimensional Data: 
       A Visual Analytics Approach

Speaker: Klaus Mueller, Stony Brook University

Date: Monday, November 22, 2010 12:00 - 1:00 pm

Location: DIMACS Center, CoRE Bldg, Room 431, Rutgers University, 
                Busch Campus, Piscataway, NJ
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Abstract:

The growth of digital data is tremendous. Any aspect of life and
matter is being recorded and stored on cheap disks, either in the
cloud, in businesses, or in research labs. We can now afford to
explore very complex relationships with many variables playing a
part. But for this we need powerful tools that allow us to be
creative, to sculpt this intricate insight from the raw block of data
and finally create a formal model capturing this insight. This process
of learning models from raw data typically requires a substantial
amount of user input during the model initialization
phase. High-quality visual feedback can play a decisive role here. To
this end, I will present an assistive visualization system which
greatly reduces the load on the users and makes the process of model
initialization and refinement more interactive and efficient. In
addition, I will also discuss various platforms we have developed over
the years to make the exploration of multivariate (high-dimensional)
data more intuitive and direct. Here I will discuss our recent work on
illustrative parallel coordinates, space embedding, and multivariate
scatterplots.