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Current Academic Year Seminars

BLOCK 2, 2015 - September/October


Friday, October 9th at NOON
TSC 122 Kresge Lecture Hall

Pizza Provided

 Sarah Fletcher Mercaldo, Vanderbilt University
Title: "Best Practices for Constructing and Applying Clinical Prediction Models in the Presence of Non-Ignorable Missing Data"  

Rated: PG-13

Abstract: Clinical prediction models use clinical and demographic information to predict the probability that a patient has a certain disease or clinical status. When patient data is missing, care must be taken in both constructing and applying the prediction model. In this presentation, I will introduce different types of missing data often observed in clinical and electronic medical record data. While certain kinds of missing data can be imputed successfully with simple or fancy imputation schemes, the most complicated case when the data are missing NOT at random presents substantial problems for researchers. Here I present several strategies for imputing data that are missing NOT at random and I evaluate and compare the performance of these strategies.

For demonstration, I will use the TREAT risk prediction model, which was developed from a cohort of 492 participants with known or suspected lung cancer evaluated for lung surgery. In this cohort 264 patients had complete data, and 228 patients were missing at least one predictor. When a physician is applying the TREAT model at the bedside to a patient, he may not know or have access to all the information the model requires, and thus how that data is imputed becomes critical to the application of the model. Prediction models such as the TREAT model are being used more frequently to inform clinical decisions. However, published prediction models cannot be applied when a patients clinical data is missing. Proper handling of missing data is key to developing a robust and accurate prediction model


Friday, October 2nd at NOON
TSC 122 - Kresge Lecture Hall
Pizza will be provided!

Speaker: Benjamin Ylvisaker
Title: "Google, The NSA and The Supreme Leader are Listening!"  

Rated: PG

Abstract: There is an enormous amount of private data sent and stored insecurely over the Internet. Powerful governmental, corporate and/or criminal organizations are actively collecting and exploiting this data. This talk will introduce a broad range of concepts in
information security and privacy. In particular we will discuss new ideas related to storing data securely in public cloud storage services.

All majors must write up four talks in order to graduate.  Talk write ups should be submitted through Canvas.  If you wish to be added to the Canvas page, please contact one of the paraprofs.  


Friday, September 4th at 2:30pm in TSC 229
Speaker: Darren Funk-Neubauer
Title: "Bidiagonal Pairs and Bidiagonal Triples."

Rated: PG-13 with R rated sections

Abstract: Roughly speaking, a bidiagonal pair is a pair of diagonalizable linear transformations on a finite-dimensional vector space, each of which acts in a bidiagonal fashion on the eigenspaces of the other. A classification of bidiagonal pairs will be presented. Then I will describe how to construct all bidiagonal pairs using representations of the Lie algebra sl2 and the quantum group Uq (sl2) . Next, I will explain how to extend the definition of bidiagonal pair to a triple of linear transformations, thus defining a bidiagonal triple. I will discuss in what sense a given bidiagonal pair determines a bidiagonal triple. Lastly, I will describe the classification of bidiagonal triples.


BLOCK 1, 2015 - August/September

Departmental Research Overview and Ice Cream Social
Friday, September 4th at NOON
TSC 122 - Tutt Science Lecture Hall

Rated G

This general-audience talk will showcase the various research interests of the Department of Mathematics and Computer Science at Colorado College. Each faculty member will provide a brief description of their scholarly pursuits. Pizza will be provided!
Faculty speakers will include
• Marlow Anderson - Wild Automorphisms of the Complex Plane, History of Mathematics
• David Brown - Mathematical Biology
• Andrea Bruder - Differential Equations
• Rodney James - Tropical Geometry
• Steven Janke – Computational Complexity
• Molly Moran - Geometric Group Theory
• Stefan Erickson - Computational Number Theory and Cryptography.

Immediately after the talk, we will be hosting an ice cream social for all students in the department lounge on the second floor of Tutt Science