Department of Mathematics
Departmental Colloquia and Seminars
Mathematics Colloquium
On Thursday, April 26, 2012,
Dr. Alexander Munson,
of Towson University,
will present a colloquium on
Symplectic toric varieties: The tale behind the logo of the 2012 Bridges Conference.
Abstract:
The official logo of the 2012 Bridges Conference, the gyrangle,
is a Delzant polytope under continuous perturbations. One can think of the perturbed
gyrangle as the image of the moment map \(\mu : M \to g^*\) of a symplectic manifold
\( (M, \omega) \) with a torus action, \( T^d \times M \to M\). The class of Delzant
polytopes can be put into a 1-1 correspondence with all such symplectic manifolds
admitting a torus action. In this talk, we will explore the connections between the
aesthetic beauties of the gyrangle and its underlying mathematical roots.
This colloquium will be held in
7800 York Road,
Room 320
at 3:30 p.m.
Past talks include:
- On Thursday, April 5, 2012,
Dr. Thomas Seidman,
Professor of Mathematics at the University of Maryland Baltimore County,
presented a colloquium on
Existence of periodic solutions of hybrid dynamical systems.
- On Thursday, March 29, 2012,
Dr. Joshua Lansky,
Associate Professor of Mathematics at American University,
presented a lecture on
Finite reductive groups: Representations and liftings.
- On Thursday, December 1, 2011,
Dr. Amanda Jansen,
Associate Professor of Education at the University of Delaware,
presented a colloquium on
Enacting care for mathematics learners: Middle school students’ and teachers’ perspectives.
- On Wednesday, October 19, 2011,
Dr. Mattias Gobbert ,
Professor of Mathematics at the University of Maryland Baltimore County,
presented a colloquium on
Efficient parallel computing of finite element methods for long-time simulations of calcium waves in a heart cell.
- On Wednesday, November 9, 2011,
Ms. Bette Kundert, Educational Specialist with the Maryland State Department of Education,
presented a lecture on
The road ahead and the tools to navigate it: The Common Core and PARCC assessments impact on all of us.
- On Thursday, November 17, 2011,
Dr. Christian Altomare, of Towson University,
presented a colloquium on
Proving infinitely many structure theorems at once.
Mathematics Faculty Seminar
The next meeting of the faculty seminar for the Spring 2012 semester will take
place on Monday, April 16, in YR 320, starting at 2 p.m. The speaker will be
Dr. Xiaoyin Wang,
who will give a lecture on Bayesian Dominance Hierarchies of Predictors' Relative Importance.
Abstract: Regression analysis is perhaps the most frequently used
statistical tool for the analysis of data in practice. The purpose of regression
analysis is to predict or explain response values from several well-selected predictors.
In the model selection stage one identifies a subset of p predictors from the full set
of q predictors that provides the most adequate description of the response variable,
Y.
Relative importance analysis is a very useful supplement to regression
analysis. The purpose of determining predictor importance is not
model selection but rather uncovering the individual contributions
of the predictors relative to each other within a selected model.
The purpose of this article is to extend the current research
practice by developing a statistical model based approach in the
Bayesian framework to evaluate the relative importance of each
predictor in a multiple regression model. We will first illustrate the Dominance Analysis procedure, and will then use our
critic as a starting point to introduce a Bayesian approach based on a statistical model
of paired comparison, which we call Bayesian Dominance Hierarchies. Simulation studies
are conducted in different contexts to compare with the outcomes of DA under ordinary
multiple regression and logistics regression models, followed by empirical examples. Finally,
the discussion will lead to reviewing potential future research avenues.
Past talks include:
- On Wednesday, April 11, Dr. R. Michael Krach gave a sabbatical
talk on A middle school experience: Sabbatical #2.
Research Seminar in Approximation Theory
This is a working research seminar. Contact Dr. Tatyana Sorokina or Dr. Sergiy Borodachov if you want to find about forthcoming topics or are interested in giving a talk.
The Department of Mathematics at Towson University also encourages your participation at other local area college and university mathematics colloquia and at the University of Maryland College Park. Links to these other colloquia are found below:
Department of Mathematics
7800 York Road, Room 316 (campus map)
Hours: Monday - Friday, 8:30 a.m. – 5 p.m.
Phone: 410-704-3091
Fax: 410-704-4149
E-mail: math@towson.edu
|
 |
|
