Seminars archive
Upcoming Seminars   No upcoming seminars currently scheduled.  Past Seminars   Seminar: Numerical Analysis and Scientific Computing Bridging the Gap: Math across Emory Samuel Sober, Roberto Franzosi, Gordon Berman, Emory University   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. 
