# Events By Year

## « 2017 »

## Mon Jan 9, 2017

## ACMS Colloquium: Stefano Castruccio, School of Mathematics & Statistics, Newcastle University

###
4:15 PM - 5:15 PM

127 Hayes-Healy Center

Stefano Castruccio, School of Mathematics & Statistics, Newcastle University, will give a colloquium titled, "Stochastic Approximations of Complex Deterministic Models: Environmental Applications" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Wed Jan 11, 2017

## ACMS Colloquium: Kuang-Yao Lee, Department of Biostatistics,Yale School of Public Health

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Kuang-Yao Lee, Department of Biostatistics, Yale School of Public Health, will give a colloquium titled, "On additive conditional independence for high-dimensional statistical analysi" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Mon Jan 16, 2017

## ACMS Colloquium: Jon Arnie Steingrimsson, Department of Biostatistics, Johns Hopkins University

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Jon Arnie Steingrimsson, Department of Biostatistics, Johns Hopkins University, will give a colloquium titled, "Doubly Robust Survival Trees and Forests" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Fri Jan 20, 2017

## ACMS Colloquium: Yifei Sun, Department of Biostatistics, Johns Hopkins University

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Yifei Sun, Department of Biostatistics, Johns Hopkins University, will give a colloquium titled, "Recurrent Marker Processes in the Presence of Competing Terminal Events " at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Mon Jan 23, 2017

## ACMS Colloquium: Ping-Shou Zhong, Department of Statistics & Probability, Michigan State University

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Ping-Shou Zhong, Department of Statistics & Probability, Michigan State University, will give a colloquium titled, "Test for Temporal Homogeneity of High-Dimensional Means with Application to fMRI Studies" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Tue Jan 31, 2017

## ACMS Statistics Seminar: Ick Hoon Jin

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4:00 PM - 5:00 PM

154 Hurley Hall

**Ick Hoon Jin**

**University of Notre Dame
Applied Computational Mathematics and Stistics**

**4:00 PM**

**154 Hurley**

**A Doubly Latent Space Joint Model for the Analysis of Item Response Data**

Item response theory (IRT) models explain an observed item response as a function of a respondent's latent trait and the item's property. Local independence, which is a critical assumption for IRT, is often violated during real testing situations, and this violation can severely bias item and person parameter estimates. We propose a new type of model, so-called a doubly latent space joint model, for item response data which does not require the local independence assumption. Our proposed model can estimate relative distances between pairs of items to represent the item dependence structure, which can also be used to identify items clusters in latent spaces. Our approach introduces a new type response analysis with opportunities for further applications and extensions.…

### Posted In: Statistics Seminar

## Tue Feb 21, 2017

## ACMS Statistics Seminar: Anindya Bhadra

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4:00 PM - 5:00 PM

154 Hurley Hall

**Anindya Bhadra**

**Purdue University**

**4:00 PM**

**154 Hurley**

**Default Bayes and Prediction Problems With Global-local Shrinkage Priors**

Global-local shrinkage priors, such as the horseshoe prior, have recently emerged as computationally attractive alternatives to spike-and-slab priors in high-dimensional Bayesian problems. In recent years, global-local priors have been studied extensively in the simple normal means model and many attractive theoretical properties have been discovered. The purpose of this talk, however, is to go beyond the normal means model. We will focus on two problems: (a) we will show that global-local priors result in non-informative answers where the parameter of interest is not the vector of normal means per se, but its low-dimensional function, e.g. the sum of squares or maximum, and (b) we will quantify the prediciton risk of global-local priors in regression problems and demonstrate that they can remedy some serious shortcomings of purely global methods of shrinkage, e.g. ridge regression or principal components regression.…

### Posted In: Statistics Seminar

## Ask the Actuaries: Developing New Coverages for a Niche Market

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5:30 PM - 6:30 PM

125 DeBartolo

## Josh Spencer

AVP-Chief Actuary, Brotherhood Mutual Insurance Company

February 21, 2017

5:30 pm

125 DeBartolo

Josh Spencer is an insurance leader who moved to Fort Wayne in 2014 from Illinois. He studied actuarial science, insurance, and finance at Ball State before proceeding to consult corporations, cities, risk pools, and insurance companies throughout North America on actuarial issues. Passionate about serving churches, Josh joined Brotherhood Mutual and currently serves as Chief Actuary where he is responsible for all aspects of the actuarial program including research and product development. Josh, his wife Jessi, and daughter Violet live on the south side of downtown Fort Wayne where they are active in neighborhood events and organizations that promote positive community and economic growth throughout the city center. Josh is a volunteer at Pine Hills City Church and serves on the board for the Ball State Actuarial Program and Northeast Indiana Public Radio.…

### Posted In: Delahanty Foundation Speaker Series (fka Ask the Actuaries) and Student Events

## Mon Mar 6, 2017

## ACMS Colloquium: Guo-Cheng Yuan, Department of Biostatistics & Computational Biology, Dana-Farber Cancer Institute & Harvard T.H. Chan School of Public Health

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Guo-Cheng Yuan, Department of Biotatistics & Computational Biology, Dana-Farber Cancer Institute & T.H. Chan School of Public Health, will give a colloquium titled, "Mapping Cell States from Single-Cell Gene Expression Data" at 4:15 PM in 127 Hayes-Healy Center.…

### Posted In: ACMS Colloquia

## Tue Mar 7, 2017

## ACMS Statistics Seminar: Sriram Somanchi

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4:00 PM - 5:00 PM

154 Hurley Hall

**Sriram Somanchi**

**University of Notre Dame**

**4:00 PM**

**154 Hurley**

**Detecting Heterogeneous Treatment Effects in Patient Care using Anomalous Pattern Detection**

Patient care data, such as Electronic Health Records (EHR) and health insurance claims, create a unique opportunity to improve clinical practice by analyzing patterns across patients and providing actionable insights.…

### Posted In: Statistics Seminar

## Wed Mar 8, 2017

## Ask the Actuaries Seminar: Society of Actuaries Research and the Study of Mortality Improvement

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5:30 PM - 6:30 PM

125 DeBartolo

## Dale Hall

March 8, 2017

5:30 pm

125 DeBartolo

R. Dale Hall, FSA, CERA, CFA, MAAA, is managing director of Research for the Socity of Actuaries (SOA), a position he has held since December 2013. In his role, Hall coordinates tha SOA's straegic research partnerships, oversees SOA experience studies, coordinates research across teh SOA's wide variety of actuarial practice areas, and directs the SOA's data-driven in-house research initiatives. He is a grequent speaker at insurance and retirement industry meetings to highlight SOA research, including presentations to the actuarial task forces of the Ntional Association of Insurance Commissioners and testimony to the House Ways and Means Subcommittee on Select Revenue Measures on pension plan mortality rates.…

### Posted In: Delahanty Foundation Speaker Series (fka Ask the Actuaries) and Student Events

## Thu Mar 9, 2017

## Finding & Counting Equilibria of the Kuramoto Model

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3:00 PM - 3:25 PM

154 Hurley Hall

**Owen Coss**

**3:00 PM**

**154 Hurley**

**Finding & Counting Equilibria of the Kuramoto Model**

The Kuramoto model is used to describe synchronization behavior of a large set of oscillators. The equilibria of this model can be computed by solving a system of polynomial equations using algebraic geometry. Typical methods for solving such polynomial systems compute all complex equilibrium points when only the real equilibrium points are of physical interest, and are very slow. We developed an approach to compute only the real equilibrium points. This approach allows for a much more efficient solving algorithm and offers insight into the maximum number of real equilibria.…

### Posted In: Applied Math Seminar

## ACMS Applied Math Seminar: Nathan Bliss

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3:30 PM - 4:30 PM

154 Hurley Hall

**Nathan Bliss**

**University of Illinois, Chicago**

**3:30 PM**

**154 Hurley**

**The Method of Gauss-Newton to Compute Power Series Solutions of Polynomial Homotopies**

We consider the extension of the method of Gauss-Newton from complex floating-point arithmetic to the field of truncated power series with complex floating-point coefficients. With linearization we formulate a linear system where the coefficient matrix is instead a series with matrix coefficients. We show that in the regular case, the solution of the linear system satisfies the conditions of the Hermite interpolation problem. In general, we solve a Hermite-Laurent interpolation problem, via a lower triangular echelon form on the coefficient matrix. We conclude with a few illustrative examples, with an eye toward homotopy continuation.…

### Posted In: Applied Math Seminar

## Mon Mar 20, 2017

## ACMS Colloquium: Hongkai Ji, Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Hongkai Ji, Department of Biotatistics, Johns Hopkins Bloomberg School of Public Health, will give a colloquium titled, "Big Data Regression for Predicting Genome-wide Functional Genomic Signals" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Tue Mar 21, 2017

## ACMS Colloquium: Michael Pruitt, Department of Applied and Computational Mathematics and Statistics, University of Notre Dame

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3:45 PM - 4:45 PM

127 Hayes-Healy

Michael Pruitt, Department of Applied and Computational Mathematics and Statistics, University of Notre Dame, will give a colloquium titled, "The Discrete Green's Function in Finite Element Methods" at 3:45 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## ACMS Statistics Seminar: Drew Lazar

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4:00 PM - 5:00 PM

154 Hurley Hall

**Drew Lazar**

**Ball State University**

**4:00 PM**

**154 Hurley**

**Robust Statistical Inference of Manifold-Valued Data**

Using Riemannian manifolds to model data with non-linear constraints has been of increasing interest recently. Much work has been done on parametric and nonparametric inference of measures of center of such data. Robustness of such measures must be a concern to adequately account for outliers or contaminations in samples of manifold-valued data. In this talk, we will introduce a procedure for robust estimation of both extrinsic and intrinsic means of distributions on a manifold, which are shown to be robust to outliers and contaminations of arbitrary nature. We will then demonstrate this method and methods of computation for several types of manifolds. …

### Posted In: Statistics Seminar

## Fri Mar 24, 2017

## COS-JAM Abstract Deadline

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All Day

College of Science, University of Notre Dame

Save the date! The eleventh annual College of Science Joint Annual Meeting (COS-JAM) well be held in the Jordan Hall of Science on Friday, May 5, 2017, as part of the tenth Undergraduate Scholars Conference.

All undergraduate students in the College of Science are invited to participate in COS-JAM by sharing their original research with faculty and students, in either an oral or poster format. Research may have been conducted on or off campus, and mentored by faculty from the University of Notre Dame or at other universities and colleges.

### Posted In: Conferences

## Mon Mar 27, 2017

## ACMS Colloquium: Nicholas Navin, Department of Genetics, MD Anderson Cancer Center

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Nicholas Navin, Department of Genetics, MD Anderson Cancer Center, will give a colloquium titled, "Tumor Evolution at Single Cell Genomic Resolution " at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Ask the Actuaries Seminar: Actuarial Careers: Balancing Work and Play While Making a Difference

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5:30 PM - 6:30 PM

125 DeBartolo

## Andy Hiles, F.S.A., M.A.A.A.

March 27, 2017

5:30 pm

125 DeBartolo

Andy Hiles is a business leader with over 20 years' experience in benefits strategy, design, funding and administration. Andy joined Aetna in 2014 and is the Vice President, National Accounts Risk Management and Analytics. A +$9 billion business, Aetna National Accounts delivers innovative, customer-focused benefits solutions to large employers-covering over 7 million medical members throughout North America. Andy also works directly with customers providing insight on the development of strategic benefits plans which can position employers to meet company cost and talent objectives.…

### Posted In: Delahanty Foundation Speaker Series (fka Ask the Actuaries) and Student Events

## Tue Mar 28, 2017

## ACMS Statistics Seminar: Zhiyong (Johnny) Zhang

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4:00 PM - 5:00 PM

154 Hurley Hall

**Zhiyong (Johnny) Zhang**

**University of Notre Dame**

**4:00 PM**

**154 Hurley**

**Two-Stage Bayesian Estimation in Structural Equation Modeling**

Bayesian estimation (BE) methods have gained vast popularity in estimating structural equation models (SEMs), given its flexibility to estimate more complex models and incorporate prior information. However, for the existing methods, specifying priors is often difficult and convergence diagnostic of the MCMC iterative procedures is challenging for applied researchers. In this study, a two-stage procedure is proposed to obtain Bayesian estimates of structural equation models. In the first stage, samples for the convariance parameter matrices are independently drawn from its posterior distribution. In the second stage, the model parameter estimates are obtained by fitting a SEM model to the covariance matrices. The newly proposed two-stage procedure solves the challenges faced by the conventional Bayesian SEM. First, prior distributions are specified on the covariance parameter matrix, regardless of the model used. Second, the samples of parameters obtained using the two-stage procedure are independent of each other and thus the convergence diagnostic is not necessary. Simulation studies show that the new method performs well comparing to the conventional Bayesian SEM.…

### Posted In: Statistics Seminar

## Thu Mar 30, 2017

## Ph.D Defense: Shant Mahserejian

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3:00 PM - 6:00 PM

154 Hurley Hall

Doctoral candidate, Shant Mahserejian, will defend his dissertation, Thursday, March 30, 2017, at 3:00 PM in 154 Hurley Hall.

The beginning portion is open to the public.

*Title: A Modeling Study to Characterize Microtubule Mechanisms of Dynamic Instability: Connecting Micro-level Tip Structures to Macro-level Phases*…

### Posted In: PhD Defense

## Fri Mar 31, 2017

## ACMS Colloquium: Dexuan Xie, Department of Mathematical Sciences, University of Wisconsin-Milwaukee

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Dexuan Xie, Department of Mathematical Sciences, University of Wisconsin-Milwaukee, will give a colloquium titled, "New Advances in Fast Finite Element Solvers for Local and Nonlocal Electrostatic Continuum Models" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Mon Apr 3, 2017

## ACMS-Math Joint Colloquium: David Harbater, Department of Mathematics, University of Pennsylvania

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4:15 PM - 5:15 PM

127 Hayes-Heealy Center

David Harbater, Department of Mathematics, University of Pennsylvania, will give a colloquium titled, Inverse Galois Problems for Differential Equations at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Ask the Actuaries Seminar: ACMS Alumni Panel

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5:30 PM - 6:30 PM

125 DeBartolo

## ACMS Alumni Panel

April 3, 2017

5:30 pm

125 DeBartolo

Allison Dahl - Allison is a derivatives analyst for Allianz Investment Management at Allianz Life Insurance Company of North America in Minneapolis, MN. As a member of the Fixed Index Annuity Portfolio Management team, her responsibilites include static and dynamic hedge production as well as software development. She graduated from the University of Notre Dame with a Bachelor of Science in Applied and Computational Mathematics and Statistics and a minor in Actuarial Science in 2016.…

### Posted In: Delahanty Foundation Speaker Series (fka Ask the Actuaries) and Student Events

## Tue Apr 4, 2017

## Ph.D Defense: Michael Machen

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10:00 AM - 12:00 PM

154 Hurley Hall

Doctoral candidate, Michael Machen, will defend his dissertation, Tuesday, April 4, 2017, at 10:00 AM in 154 Hurley Hall.

The beginning portion is open to the public.

*Title: KRYLOV IMPLICIT INTEGRATION FACTOR METHODS FOR SOLVING FOURTH ORDER EQUATIONS*

Adviser: Yongtao Zhang

Examination Committee: Bei Hu, Zhiliang Xu…

### Posted In: PhD Defense

## Statistics Seminar: Chaoli Wang

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4:00 PM - 5:00 PM

154 Hurley Hall

**Chaoli Wang**

**University of Notre Dame**

**4:00 PM**

**154 Hurley**

**A Statistical Approach to Geometry-Based Flow Visualization**

Visual understanding of three-dimensional fluid flows plays an important role in many scientific, engineering, and medical disciplines. The most popular way to visualize a flow field is to depict the paths, i.e., streamlines for steady flows or pathlines for unsteady flows, that fluid elements will follow at any point in time. As the size and complexity of flow data continue to grow, this geometry-based method simply does not scale due to the inherent occulsion and clutter presented in the visualization. In this talk, i will first give a brief introduction to flow visualization and then present two of our recent works that apply statistical techniques to effective geometry-based flow visualization. The first is a vocabulary approach that extracts shape invariant features from streamlines for exploratory flow analysis and visualization, and the second is a unified framework that solves the problems of streamline selection and viewpoint selection using a dual information channel.…

### Posted In: Statistics Seminar

## Wed Apr 5, 2017

## ACMS Colloquium: Hoon Hong, Department of Mathematics, North Carolina State University

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4:15 PM - 5:15 PM

127 Hayes-Healy Center

Hoon Hong, Department of Mathematics, North Carolina State University, will give a colloquium titled, "Maximum Gap in Cyclotomic Polynomial" at 4:15 PM in 127 Hayes-Healy Center.

### Posted In: ACMS Colloquia

## Thu Apr 6, 2017

## Ph.D. Defense: Alicia Specht

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3:00 PM - 5:00 PM

154 Hurley Hall

Doctoral candidate, Alicia Specht, will defend her dissertation, Thursday, April 6, 2017, at 3:00 PM in 154 Hurley Hall.

The beginning portion is open to the public.

*Title: Robust Inference and Network Analysis for non-Gaussian Gene-Expression Data*

Adviser: Jun Li

Examination Committee: Steven Buechler, Fang Liu…

### Posted In: PhD Defense

## ACMS Applied Math Seminar: Hoon Hong

###
4:30 PM - 5:30 PM

129 Hayes-Healy

**Hoon Hong**

**North Carolina State University**

**4:30 PM**

**129 Hayes-Healy**

**Connectivity in Semialgebraic Sets**

A semialgebraic set is a subset of real space defined by polynomial equations and inequalities. A semialgebraic set is a union of finitely many maximally connected components. In this talk, we consider the problem of deciding whether two given points in a semialgebraic set are connected, that is, whether the two points lie in a same connected component. In particular, we consider the semialgebraic set defined by f not equal 0 where f is a given bivariate polynomial. The motivation comes from the observation that many important/non-trivial problems in science and engineering can be often reduced to that of connectivity. Due to its importance, there has been intense research effort on the problem. We will describe a method based on gradient fields and provide a sketch of the proof of correctness based Morse complex. The method seems to be more efficient thant the previous methods in practice. We will also provide a bound on the length of the curves connecting the points. …

### Posted In: Applied Math Seminar

## Sat Apr 8, 2017

## 5th Midwest Quantitative Biology Symposium

###
All Day

105 Jordan Hall of Science

**5th Semi-Annual Midwest Quantitative Biology Symposium (MidQBio)**

**University of Notre Dame**

Saturday, April 8, 2017

9:00am-6:00pm

Jordan Hall of Science, Room 105

University of Notre Dame

Notre Dame, IN 46556

REGISTRATION IS NOW CLOSED.…