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ISyE Seminar Series: Karla Hillier

 

Karla Hillier

"Solving Problems with Analytics and Machine Learning Across Industries"

Presentation by Karla Hillier
Director, Decision Science & Advanced Analytics
Trane Technologies

Wednesday, November 4
3:30-5:00 PM CST — Graduate Seminar and Reception (Zoom)
 

About the seminar:

Learn how analytics and machine learning have been deployed to advance business goals in industries ranging from retail and hospitality to health care and manufacturing.  A wide range of tools and approaches have been deployed in teams with different structures to deliver results in both publicly held and private companies.

Bio:

Karla Hillier is Director, Decision Science and Advanced Analytics for the residential HVAC business of Trane Technologies. Her team uses data to help grow our customers. Prior to that, she was Director of Data Science at Optum working on critical health care problems. At Radisson Hotel Group, she managed a team of analysts providing insights to multiple functions. At SUPERVALU, she led the development of a store/item/day level forecast to improve availability.  She has an MBA from Georgetown University and a BA from Miami University in Oxford, Ohio.  She lives in Minneapolis with her husband Ian, and dog Kona.

Seminar Video:

ISyE Seminar Series: Karla Hillier

 

Karla Hillier

"Solving Problems with Analytics and Machine Learning Across Industries"

Presentation by Karla Hillier
Director, Decision Science & Advanced Analytics
Trane Technologies

Wednesday, November 4
3:30-5:00 PM CST — Graduate Seminar and Reception (Zoom)

 

About the seminar:

Learn how analytics and machine learning have been deployed to advance business goals in industries ranging from retail and hospitality to health care and manufacturing.  A wide range of tools and approaches have been deployed in teams with different structures to deliver results in both publicly held and private companies.

Bio:

Karla Hillier is Director, Decision Science and Advanced Analytics for the residential HVAC business of Trane Technologies. Her team uses data to help grow our customers. Prior to that, she was Director of Data Science at Optum working on critical health care problems. At Radisson Hotel Group, she managed a team of analysts providing insights to multiple functions. At SUPERVALU, she led the development of a store/item/day level forecast to improve availability.  She has an MBA from Georgetown University and a BA from Miami University in Oxford, Ohio.  She lives in Minneapolis with her husband Ian, and dog Kona.

ISyE Seminar Series: Vivek Saxena

 

Vivek Saxena

"Digital Technologies in Aerospace Manufacturing - A Perspective from the Industry"

Presentation by Dr. Vivek Saxena
Founder & Managing Director
Advisory Aerospace OSC

Wednesday, October 28
3:30-5:00 PM CST — Graduate Seminar and Reception (Zoom)
 

About the seminar:

We will start with a short introduction of the aerospace industry and the structure of manufacturing value chains in aircraft manufacturing. We will then discuss the current state of digital methods and technologies in various tiers of aerospace manufacturers. 

The practical issues associated with the application of the advances in Operations Research will then be addressed with particular emphasis on the problem of shop optimization. We will share some of our recent results using the MLCLSP (Multi Level Capacitated Lot Sizing Problem)  algorithm used in our proprietary tool – OptimizerAero™. The results show that within a short period (typically within a part manufacturing lead time), the shop performance shows a step improvement, guided by our tool’s recommended strategies. We will close with our plans to further enhance our algorithm and to simplify the deployment of the OptimizerAero™ tool.

Bio:

Vivek founded Advisory Aerospace OSC after 30 years in academics, aerospace industry and consulting. Advisory Aerospace OSC targets the massive unmet need for digital technologies in Operations & Supply Chain (OSC) functions in aerospace industry, especially at Small & Medium Enterprises (SMEs). Previously, he held a variety of roles such as Chief Engineer, Plant Manager, President and CEO at various aerospace companies. 

He has a PhD in Applied Math from the University of Cambridge. His work at Cambridge and Cornell focused on modeling of complex phenomena like gas turbine combustion, including stochastic simulation techniques. As an MS student at UMN, he contributed to the design of the Saint Anthony Falls wind tunnel. 

ISyE Seminar Series: John Khawam

 

John Khawam

"Making the Most of Inventory: Advance Inventory Availability at Stitch Fix"

Presentation by Dr. John Khawam
Data Science Manager
Inventory Optimization Algorithms
Stitch Fix

Wednesday, October 21
3:30-5:00 PM CST — Graduate Seminar and Reception (Zoom)

 

About the seminar:

We explore the use of advance supply information (ASI) regarding returns from customers, which allows inventory to be probabilistically reserved for new orders. Stitch Fix’s sales channel has traditionally composed of fixes — a surprise box of 5 personalized items, any of which can be returned for free. Stitch Fix has recently opened up a more traditional direct order sales channel. In both of these channels, it is advantageous to look into the returns supply chain to see what we expect in the warehouse in the near future. We will cover the pluses and minuses of such an approach and talk about the future of ASI at Stitch Fix.

Bio:

John Khawam is a Data Science Manager on the Inventory Optimization Algorithms team at Stitch Fix. His team focuses on Advance Inventory, Pricing, and Inventory Health. Previously, John was an Engineering Manager of a Data Science team focusing on safety at Cruise. Before that, he was a Senior Data Scientist at Google, an Assistant Professor at the Naval Postgraduate School, and a postdoc at WHU – Otto Beisheim School of Management. He is a Ph.D. graduate from Stanford University and has his M.Eng. and B.S. from Cornell University. He has also worked at Gap, Lord & Taylor, e2e Analytics, Aspen Tech, Eaton, and Allied Signal.

Seminar Video:

Curiosity Drives Progress Lecture Series: Impacting Communities

This event features talks by CSE distinguished professors Saif Benjaafar (Industrial and Systems Engineering), Lucy Fortson (Physics and Astronomy), and Ellad Tadmor (Aerospace Engineering and Mechanics)

Thursday, October 8, 2020
6:30–8 p.m. – 
Lecture, followed by Q&A session
This event will be held as a webinar via Zoom

Register today!
 

Instructions to join the Zoom webinar will be included in the registration confirmation email. If you have questions, please contact csealumni@umn.edu.

About the talks

“From Digital Marketplaces to Gig Work: The Promise and Perils of the On-Demand Economy”

Saif Benjaafar

By Saif Benjaafar, Department Head and Distinguished McKnight University Professor, Department of Industrial and Systems Engineering 

Life under COVID-19 has given us a glimpse of a perhaps not too distant future where products and services are delivered to our doorsteps anywhere any time and on an on-demand basis. In this talk, Dr. Benjaafar will discuss the technological and business drivers (from 3D printing to crowdsourcing) behind the transition to an on-demand economy and what it means to the future of work, commerce, and cities.
 

“To the Zooniverse and Beyond: How Crowdsourcing Science is Solving Big Data Problems for UMN Researchers"

Lucy Fortson

By Lucy Fortson, Associate Department Head and Professor, School of Physics and Astronomy

What do lions, galaxies, cell nuclei and notes taken by the Justices of the United States Supreme Court have in common? Each of these is a topic of intense research by faculty at the University of Minnesota—and each suffers from a similar problem: too much complex data for researchers to properly analyze. You might think that computers should be able to tackle these problems, but in fact, pattern matching (a hallmark of analyzing complex data) is exactly where computers still lag behind even a human child.

So how can researchers make any progress in problems where human visual processing of millions of images is required? By turning to the general public and asking for their help. This talk will describe the Zooniverse project, and will take you on a tour of the engaging projects in the Zooniverse—from the lions in the Serengeti to galaxies in the furthest reaches of time and space. Along the way, Professor Fortson will describe the issues that researchers now face with “Big Data,” what crowdsourcing is, and how combining human intelligence with artificial intelligence is revolutionizing how science is being done.
 

“Can Truth Save Democracy? We’re Trying in Science Court”

Ellad Tadmor

By Ellad B. Tadmor, Professor of Aerospace Engineering and Mechanics

Some say we live in a "post truth" world, but there is no such thing. Humans would not have survived as a species if they were not able to rationally assess the world about them and make sensible decisions. In “Science Court” we are trying to apply this common sense thinking to tackle controversial societal issues that divide us as Americans. The students participating in this Honors Seminar pick the topic, spend a semester researching the facts, and argue the pros and cons in a mock trial in front of a diverse jury of citizens.

Science Court draws on the traditions of the U.S. jury system, but adapts the process based on understanding from scientific research on how people reason and collaborate to maximize the likelihood of reaching consensus. The hope is that by spreading this model to other universities, Science Court will help to reduce polarization and help our democracy function in a time when trust in all institutions (including democracy itself) are at historical lows.
 

Read more about his class in Inventing Tomorrow, Winter 2020.

ISyE Grad Social Event

We are having our semesterly Grad Social Event on Friday, October 2, from 12:30 to 2:00 p.m. over Zoom this year. We will start by getting familiar with each other, then eat our lunches together, and finally play some online games or if you just want to chill we'll have a breakout room for that too. So, come hang out with us! 

Please RSVP so we can get a headcount for the number of breakout rooms we'll need.

ISyE Seminar Series: Chrysanthos E. Gounaris

"Decision-making Across Scales: From Supply Chains to Materials Nanostructure"

Presentation by Professor Chrysanthos E. Gounaris
Department of Chemical Engineering and Center for Advanced Process Decision-making, Carnegie Mellon University

Wednesday, September 30
3:30-5:00 PM CST — Reception and Seminar
 

About:

Modern chemical engineering contemplates topics across a wide span of scales, ranging from the need to understand and harness the chemistry that governs the performance of advanced compounds and materials, to designing industrial equipment and facilities of all kinds, to managing operations and defining corporate strategy at the enterprise level.

In this talk, we discuss our work in employing mathematical optimization approaches to tackle decision-making in the context of multiple such scales. We start with some settings arising in the supply chain of the chemical industry, for which we develop custom-built mathematical optimization models and solution algorithms to design optimal plans for daily logistics operations. Turning our focus to project scheduling, we show how the management of a pharmaceutical company can optimally allocate R&D resources towards progressing their portfolio of drugs under development.

We continue by discussing the design of process flowsheets, and present novel methods to ensure robustness of optimal process designs against uncertainties in the underlying physicochemical properties at play. Such methods have been incorporated in our tool PyROS, a Python-based implementation for robust optimization of highly nonlinear models. We conclude the talk by presenting MatOpt, our recently developed crystalline materials framework, which efficiently explores the combinatorics of how atoms may arrange themselves on lattices and identifies the specific microstructure that induces desirable properties in various materials related to energy applications.

 

Bio:

Chrysanthos Gounaris is currently Associate Professor of Chemical Engineering at Carnegie Mellon University. He received a Dipl. in Chemical Engineering and an M.Sc. in Automation Systems from the National Technical University of Athens, as well as a Ph.D. in Chemical Engineering from Princeton University. After graduation, Chrysanthos worked as an Associate at McKinsey & Co. He returned to academia to pursue post-doctoral research at Princeton, before joining the Department of Chemical Engineering at Carnegie Mellon University in 2013. His research interests lie in the development of theory and quantitative methodologies for decision-making, with emphasis in supply chain optimization and distribution logistics, production planning and scheduling, project management, process design under uncertainty, microporous and nanostructured materials design, as well as methods and tools for robust optimization and global optimization. Chrysanthos actively participates in the Center of Advanced Process Decision-making consortium, where he now directs its Enterprise-Wide Optimization special interest group. He serves as principal investigator for a number of academia-industry research collaborations, as well as participates in the leadership team of DOE’s Institute for the Design of Advanced Energy Systems (IDAES). Recent recognitions for Chrysanthos include his being named a “2020 MSDE Emerging Investigator”, his induction in the “2019 I&ECR Class of Influential Researchers”, the Glover-Klingman Prize, the CIT Dean’s Early Career Fellowship, and the Kun Li Award for Teaching Excellence. Chrysanthos has been an active member of the American Institute of Chemical Engineers, having served as Programming Chair for its Computing and Systems Technology Area 10C, while he is currently serving as co-Chair of the upcoming inaugural conference of the new Advanced Manufacturing & Processing Society, AMPc-2021. Chrysanthos is also a member of the Institute for Operations Research and the Management Sciences, being active in its Transportation Science & Logistics society.

 

Seminar Video:

 

ISyE Seminar Series: Radhika Kulkarni

"Machine Learning, Artificial Intelligence and Optimization: Opportunities for Inter-Disciplinary Innovation"

Presentation by Dr. Radhika Kulkarni
Vice President (Retired), Advanced Analytics R&D, SAS Institute Inc.

Wednesday, September 23
3:30-5:00 PM CST — Reception and Seminar
 

About:

Machine learning tools and AI platforms have become prolific in many industries. Applications range from health care to financial applications to manufacturing industries. In the world of big data and ML / AI tools, there are numerous opportunities for application of optimization techniques. Large scale implementation of machine learning tools in artificial intelligence platforms require automation at several levels – increasing productivity along the entire analytics lifecycle as well as automated model selection to improve predictive models. In many of these problems, optimization techniques play an important role in finding solutions as well as improving performance.

This presentation will provide several examples that describe some of these innovations in various industries as well as discuss trends and upcoming challenges for future research.

Often, the mathematical model and solution are only a small part of the overall problem. It is also important to ensure the availability of the data required for the model, whether the final result is easy to interpret and sustainable in the real world and a myriad other aspects. In this talk, Kulkarni will discuss some of the practical concerns that are of equal importance: ease of implementation, acceptance of the results, safeguards needed to allow for over-rides of automatic decisioning, etc.

 

Bio:

Dr. Radhika Kulkarni retired as VP, Advanced Analytics R&D at SAS Institute Inc. where she was responsible for the world’s leading Analytics Software products portfolio. She spearheaded creation of the OR/AIML Center of Excellence to provide expert consulting to several Fortune 100 companies. She holds a Ph.D. in Operations Research from Cornell University. Under her leadership, OR gained recognition as a key contributor to scalability and performance of algorithms in statistics, machine learning, forecasting, data mining, econometrics, etc. She sponsored several partnerships with universities and robust internship programs for PhD students and serves on many academic advisory boards. Kulkarni is an INFORMS Fellow and WORMS Award winner, and has contributed in numerous ways to advance the careers of analytics professionals.

 

Seminar Video:

 

ISyE Seminar Series: Matthias Poloczek

"Scalable Bayesian Optimization for High Dimensional Expensive Functions"

Presentation by Dr. Matthias Poloczek
Senior Manager, Research Scientist
Bayesian Optimization Lead

Uber AI
 

Wednesday, September 16
3:30-4:30 PM CST — Reception and Seminar

 

About:

Bayesian optimization has recently emerged as a powerful method for the sample-efficient optimization of expensive black-box functions. These functions do not have a closed-form and are evaluated for example by running a complex simulation, a lab experiment, or solving a PDE. Use cases arise in machine learning, e.g., when optimizing a reinforcement learning policy; examples in engineering include the design of aerodynamic structures or searching for better materials. However, the application of Bayesian optimization to high-dimensional problems remains challenging, and on difficult problems, Bayesian optimization is often not competitive with other paradigms.  

In the first part of the talk I will give a self-contained introduction to Bayesian optimization. Then I will present novel algorithms that overcome the previous limitations of Bayesian optimization and set a new state-of-the-art performance for high-dimensional problems.  

Based on joint work with Alexander Munteanu and Amin Nayebi presented at ICML 2019 and on joint work with David Eriksson, Michael Pearce, Jake Gardner, Ryan Turner that appeared in the Proc. of NeurIPS 2019.

References:

 

Bio:

Dr. Poloczek leads the Bayesian optimization team at Uber AI. His research interests lie at the intersection of machine learning and optimization. Recently, he has focused on enabling Bayesian optimization for "exotic" black-box problems that arise in aerospace engineering and materials science. Matthias received his PhD in CS from Goethe University in Frankfurt in 2013 and then worked as a postdoc at Cornell with David Williamson and Peter Frazier from 2014 until 2017. He was an Assistant Professor in the Department of Systems and Industrial Engineering at the University of Arizona from 2017 until 2019.

 

Seminar Video:

 

ISyE Seminar Series: Hayriye Ayhan

"Optimizing the Interaction between Residents and Attending Physicians"

Presentation by Professor Hayriye Ayhan
Stewart School of Industrial and Systems Engineering
Georgia Institute of Technology
 

Wednesday, September 9
3:30-4:30 PM CST — Reception and Seminar
 

About:

We analyze how attending physicians should allocate their time between the residents they supervise and their own responsibilities. Under the assumption that a holding cost is incurred when residents and patients wait for a conference with the attending physician, we show that there are only two policies that could maximize the long-run average reward. Namely, it is optimal for the attending physician to start having consultations with the residents either when the residents can no longer examine new patients or as soon as there is a patient ready for conference. Furthermore, we show that the optimality condition is a simple threshold on the holding cost. We then characterize when each of these policies is profitable and the optimum number of residents (supervised by the attending physician) under each policy. We show that if a health care facility operates with the optimal number of residents, the two policies become the same and it is always optimal (and profitable) for the attending physician to start conferences with the residents as soon as there is a patient waiting. We conclude with discussing various extensions of the attending physician and residents model described above. This is joint work with Sigrun Andradottir.

 

Bio:

Hayriye Ayhan is a professor in the Stewart School of Industrial and Systems Engineering at Georgia Tech. Dr. Ayhan's research interests lie mainly in analysis and control of queueing networks that arise in manufacturing and service systems. She is in particular interested in Markov decision process theory with applications to health care management, systems with flexible servers, and other manufacturing and service operations. She has authored/co-authored numerous refereed journal papers on these topics. Her research has been supported by several National Science Foundation grants including the CAREER Award. She is a member of INFORMS and INFORMS Applied Probability Society for which she serves as the secretary and the treasurer since 1999.

 

Seminar Video: