Seminars archive
Upcoming Seminars   Colloquium: Algebra Counting points, counting fields, and heights on stacks Jordan Ellenberg, University of WisconsinMadison   Defense: Dissertation On Cycles, Chorded Cycles, and Degree Conditions Ariel Keller, Emory University   Seminar: Algebra Title to be announced Nathan Kaplan, UC Irvine   Defense: Dissertation Patching and localglobal principles for gerbes with an application to homogeneous spaces Bastian Haase, Emory University   Seminar: Algebra Title to be announced Jennifer Berg, Rice   Colloquium Title to be announced Sherry Li, Lawrence Berkeley National Lab   Colloquium: Algebra Title to be announced K. Soundararajan, Stanford University   Seminar: Algebra Title to be announced Brandon William, UC Berkeley   Seminar: Algebra Title to be announced Frank Thorne, University of South Carolina  Past Seminars   Defense: Honors Thesis Application of Global Optimization to Image Registration Huiying Zhu, Emory University Venue: Mathematics and Science Center, Room E408 Show abstract Given two images, image registration aims to transform an image into a given reference image so that the two images look alike. This technique is vital in many applications, such as medical imaging and astronomy. Finding the best transform can be phrased as solving a mathematical optimization problem. Due to the nonconvexity of the objective function, commonly employed optimization techniques often generate local minimizers, limiting the accuracy of the registration. This thesis evaluates the applicability of a global optimization method, called as DDNCID, for image registration. Direct application of DDNCID in image registration could cause minimizers to be infeasible. Thus, a focus of this thesis is to add a bound constraint by imposing a barrier function into the objective function to extend DDNCID.   Seminar: Algebra On semisimplicity of tensor products in positive characteristics Vikraman Balaji, Chennai Mathematical Institute   Seminar: Algebra An arithmetic count of the lines on a cubic surface. Kirsten Wickelgren, Georgia Institute of Technology   Seminar: Combinatorics Ramsey Properties of Random Graphs and Hypergraphs Andrzej Dudek, Western Michigan University   Seminar: Numerical Analysis and Scientific Computing Accelerated Diffeomorphisms for Motion Estimation and Segmentation from Video Ganesh Sundaramoorthi, KAUST   Seminar: Algebra Congruences from quaternion algebras Kimball Martin, University of Oklahoma   Seminar: Combinatorics Extremal number of configurations in a grid Marcelo Sales, University of Sao Paulo   Seminar: Numerical Analysis and Scientific Computing Insights from computational fluid dynamic modelling for aortic arch pathologies Massimiliano MarroccoTrischitta, San Donato Hospital in Milan, Italy   Defense: Dissertation Improving Question Answering by Bridging Linguistic Structures and Statistical Learning Tomasz Jurczyk, Emory University Venue: Mathematics and Science Center, Room W301 Show abstract Question answering (QA) has lately gained lots of interest from both academic and industrial research. No matter the question, search engine users expect the machines to provide answers instantaneously, even without searching through relevant websites.\\
\\While a significant portion of these questions ask for concise and well known facts, more complex questions do exist and they often require dedicated approaches to provide robust and accurate systems.\\
\\This thesis explores linguisticallyoriented approaches for both factoid and nonfactoid question answering and applications to crossgenre tasks. The contributions include new annotation schemes for the question answering oriented corpora, extracting linguistic structures and performing matching, and early exploration of applications to conversation dialog tasks.   Seminar: Algebra Survey on recent results on maximal tori of algebraic groups Philippe Gille, CNRS, Lyon 
