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2014 eNews Daily: Day 4: Wednesday, November 12
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2014 eNews Daily
Goodbye and Thank You
We hope you enjoyed your 2014 INFORMS Annual Meeting experience. The staff at INFORMS did; it is always great to see our members in person! We hope to see you at the Analytics Conference (April 12-14), the CORS/INFORMS Conference (June 14-17), or the 2015 Annual Meeting in Philadelphia (November 1-4). Safe travels.

Today's Key Events

Plenaries & Keynotes

10-10:50am, Hilton, Continental 5
2014 Daniel H. Wagner Prize Winner Announcement and Reprise
C. Allen Butler, President, Daniel H. Wagner, Associates, Inc.

Registration
Registration will be open today from 7am-4:30pm in the Hilton, Yosemite, BR Level.

Additionally, there will be a lost and found at the registration desk.
Addendum to the Schedule
Track 3 should be listed as room Golden Gate 8 (not 7).

Due to space constraints in the originally assigned room, Track 79 of DAS sessions at the are being moved from the Parc-Powell I room to the Embarcadero room, which is also in the Wyndham Parc55 on the third floor. DAS Track 80 will remain in the Parc-Powell II room.

Monday's Interactive Session Winner
Congratulations to Masood Jabarnejad for winning the Interactive Session on Monday with his poster "Operations Research to Reduce the Cost of Electricity."

Tuesday's Interactive Session Winner
Congratulations to Yuanhui Zhang for winning the Interactive Session on Tuesday with her poster "Optimization of Treatment Decisions for Chronic Diseases: An Application to Type 2 Diabetes."

The main objective for care of type 2 diabetes is to control the patient's blood sugar level to reduce the risk of developing health complications. Uncertainty in the progression of the patient's blood sugar level, and medications' effect and side effects make the treatment decisions challenging. We developed a Markov decision model to optimize the sequence and timing to initiate hyperglycemia lowering medications to maximize the patient's quality of life. The model-based results can be used to help physicians make treatment decisions and also provide scientific evidence to help policy makers make treatment guidelines.
Wagner Prize Presentations Offered On Demand After Meeting
If you miss the Wagner presentations, no problem! In just a few weeks, INFORMS will offer meeting attendees and all members a chance to see these presentations on demand via the Web. Watch for our announcement or check the INFORMS Video Learning Center.

CAP
Certified Analytics Professional (CAP) The final day of the conference doesn't mean the final day of information on the Certified Analytics Professional (CAP) program. Beginning next month, December, we will be hosting a series of preparatory webinars to help candidates prepare to take the test: more information on this topic will be published on the certification website. Or you could email certification@informs.org with any questions.

Blog Roundup
My Way of Annual Meeting: I need to say this first: This annual meeting is way crazier than last year's. It is very likely to see someone you know in 15 minutes if you are traveling in the wild corridors of Hilton. Read more.

Remembering the Dantzig Century and a Conversation with His Daughter: What a thrill it was to listen to Professor Richard "Dick" Cottle of Stanford deliver his plenary talk "Remembering the Dantzig Century" to a standing room only overflow crowd. In a voice that was clear, steady, and filled with clear great respect for his adviser and mentor, Professor Cottle took us on a journey of Dantzig's life and contributions to our field. Through a historical timeline of milestones and achievements illustrated with photos we all felt as though George was back with us and truly he has never left us. Read more.

Three questions to answer when the conference is over: It is only Tuesday but folks are starting to depart. By Wednesday evening almost everyone will be in some mode of transportation back to their place of origination. Here are there questions to answer on the plane, train, or automobile on the way home. Read more.

COIN-OR at INFORMS 2014: OK I guess I'd better blog or they might take away my ribbon, which would threaten my clear frontrunner status in the max-cardinality badge ribbon competition. Of course, the biggest COIN-OR news here is that, on Sunday, a group of us were privileged to accept the Impact Prize on behalf of the COIN-OR community. Read more.

INFORMS: Perspectives - Banafsheh Behzad on Women in OR/MS: It's the elephant in the room that people don't really like to talk about: the lack of diversity in STEM fields. It's an important issue, though, because a group of people with different backgrounds and perspectives will always be stronger than a group of people who all have similar stories to tell. Read more.

The WORMS Awards Luncheon Rocked!: One of my favorite events of the Annual INFORMS conference is the WORMS (Women in Operations Research and the Management Sciences) luncheon at which the WORMS Award, which has been given for about a decade is announced. This is the venue that I tell my former PhD students that they should make every effort to attend and this year the lunch sold out quickly, so the news has spread! Read more.

INFORMS Career Center Closes Today at 3pm
9am-3pm, Hilton, Grand Ballroom
On-site interviews to explore opportunities in academia, industry, and government take place today. Good luck to all!
Philip McCord Morse Lectureship Award: Dimitris Bertsimas
By Andrea Hupman
Dimitris Bertsimas won the Philip McCord Morse lectureship award in 2013. The award is bestowed in honor of its namesake, a pioneer in the field of operations research and management science who was devoted to the field. Dr. Bertsimas embodies the ideals and spirit of Professor Morse. Dr. Bertsimas began the lecture with a tribute to Professor Morse, describing him as a personal hero and describing how he was inspired by Professor Morse's books.

Dr. Bertsimas illustrated how mixed-integer optimization (MIO) has improved in the last few decades. From 1991 to 2013, the speedup for solving MIO problems has been 580,000 times. A MIO that would have taken seven years to solve 20 years ago can now be solved on the same 20-year-old computer in less than a second. In that time, the speedup in hardware has been 320,000 times. Taken together, these advances represent a total speedup in solving MIO problems of 200 billion times.

Motivated by these new capabilities, Dr. Bertsimas discussed a heuristic approach to the best subset problem that uses MIO with a warm-start. With this approach, it is possible to reach an optimal solution very quickly although you may not know for sure that it is optimal at that time. As a heuristic, however, it works very well, with results that match optimal most of the time.

In the second part of the talk, Dr. Bertsimas discussed using an algorithm to build regression models. In evaluating the approach, it is difficult to compare to existing approaches due to the role of human judgment in creating regression models. The algorithm, however, is shown to have results that are similar to existing methods, but better in some measures such as sparsity.

Dr. Bertsimas concluded the lecture by questioning how we define tractability. He gave the following definition: a problem is tractable if it can be solved for sizes and in times that are appropriate for the application. By this definition, problems that were previously intractable become tractable, expanding the horizons of what is possible in operations research.
IFORS Distinguished Lecture - Credit Scoring and Financial Crisis
By Tengjiao Xiao
The IFORS Distinguished Lecture was given by Dr. Lyn Thomas from University of Southampton. The lecture was both insightful and interesting. Dr. Thomas first introduced the history of credit scoring, which uses operations research and statistical models to assess default risk, for consumer lending. The fact that San Francisco is the birth place of credit scoring is a happy coincidence. Among the different approaches have been used in credit scoring, logistic regression is the most common one being used now. Besides logistic regression, classification trees and ensemble models are currently in use as well. Read More.

Recent Advances in Utility Theory
By Andrea Hupman
Ali Abbas chaired a technical session on recent advances in utility theory. He began by posing the question of whether it is true that the multi-attribute utility can always be represented as a function of individual (single-attribute) utility functions. And the answer to the question is that it doesn't have to be.

Currently, most applications of utility theory make the assumption that the decision maker's preferences satisfy mutual utility independence. This assumption allows preferences under uncertainty to be modeled with two simple functions - the multiplicative and the additive utility function - that combine single-attribute utility functions to create a multi-attribute function. However, there is a danger in making such assumption arbitrarily. It is shown through simulation that assuming properties of utility independence when it does not hold can result in up to 25% of decisions being incorrect. This result is compared to a coin toss, in which 50% of decisions are incorrect without any analysis.

The class of utility functions that satisfy additive ordinal preferences is broader than those satisfying mutual utility independence. Dr. Abbas derived the most general functional form of these utility functions and showed that it is an Archimedean copula. This copula allows the marginal utility functions (i.e., the single-attribute utility functions) to remain constant while a parameter that governs the tradeoffs among the attributes is varied. Thus, the single-attribute preferences can remain constant while preferences for tradeoffs among the attributes can be adjusted to match the specific preferences of the decision maker.

This session highlighted that new advances in utility theory are opening exciting new opportunities for both research and practice in decision analysis.
2014 TutORials Online Book
 
All attendees receive free access to the INFORMS 2014 TutORials in OperationsResearch: Bridging Data and Decisions online content concurrently with the meeting. Registrants of the 2014 INFORMS Annual Meeting have online access to the 2014 chapters, written by select presenters, beginning on November 1, 2014. Access this content using the link provided to all attendees by email or, if you are a 2014 member, simply login to INFORMS PubsOnLine
Engage with Social Networking Tools

Guest Bloggers blogger
Be sure to check the Annual Meeting website frequently for insightful posts from our team of guest bloggers. Feel free to post your own comment.

Tweeters
All attendees are encouraged to tweet by adding hashtag #informs2014. Tweets will be displayed on the front page of the Annual Meeting website and on video monitors. Also, follow @INFORMS2014 for official conference updates. Pick up your tweeter ribbon at the INFORMS booth.

Join the Annual Meeting LinkedIn Group
Click here to join the Annual Meeting LinkedIn Group and connect with fellow attendees, discuss key topics of the day, and set up appointments.

Find Us on Facebook Join INFORMS on Facebook
"Like" INFORMS on Facebook, and let other INFORMS members know you are at the 2014 INFORMS Annual Meeting by RSVP'ing.

Pinterest Follow INFORMS on Pinterest
Check out the INFORMS Annual Meeting Board on Pinterest for interesting places to visit, eat, and enjoy in San Francisco. Follow the board for updates.

Going Green?
Program Book Kiosks
In an extended effort to go green, this year we are introducing kiosks to access a flip book of the full conference program. Two kiosks will be located in the Exhibit Hall and one kiosk will be located near the INFORMS Registration Desk in Yosemite BC.


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