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New Year’s Resolutions from Dr. O.R. Field

In a tremendous coup for the blog, I am delighted to present this interview with Dr. Operations Research Field where she sums up the year 2010 and presents her resolutions for the upcoming year. MT: Dr. Field … OR: Please, call me O.R.: all my friends do, though some call me M.S. for some reason.  […]

Operations Research, Sudoko, Rogo, and Puzzles

A few years back, Sudoko became a craze with seemingly everyone spending their time solving these puzzles.  The puzzle is quite simple:  take a nine by nine grid, partially filled in with numbers from one to nine, and complete it so that every row, column, and non-overlapping 3×3 square contains the numbers one through nine […]

The Great Operations Research Blog Challenge

At the recent INFORMS conference, a group of bloggORs (get it?) got together to discuss what sort of common activities we could do.  While we all read each others work, and periodically repost each others work, for the most part we work alone.  That is generally a good idea:  we each have a style to […]

Keto Diets and Linear Programming

In today’s New York Times Magazine, there is an article on how a ketogenic (“keto”) diet can be used to control epileptic seizures in kids.  The diet is quite something.  Referring to his son’s diet, the author Fred Vogelstein writes: His breakfast eggs are mixed with heavy cream and served with bacon. A typical lunch […]

Yet More Tag Clouds

@polybot on twitter pointed to the Tagxedo site, a site that creates displays of words, kinda like Wordle.  There are a zillion choices (and even a presentation on 101 things you can do with Tagxedo).  Here are a few I generated while Alexander did homework and I watched football on a rainy Sunday. What is […]

Definitive Word on P!=NP Paper

Lance Fortnow of the blog Computational Complexity has, I believe, the definitive word on the P!=NP paper by Deolalikar (saying in a sentence what I couldn’t quite manage in two pages): Proving P  ≠ NP will require pure genius but you shouldn’t need a Fields medalist to verify the proof. Secondary message:  a good way to […]

P versus NP and the Research Process

By now, everyone in computer science and operations research is aware of the purported P<>NP proof of Vinay Deolalikar of HP Labs.  After intense discussion (mainly through blogs and wikis), the original paper was taken down, and Vinay has prepared a new version for submission.  He claims: I have fixed all the issues that were […]

Five Sundays, Mondays, and Tuesdays and Operations Research Training

A half dozen times in the past couple of weeks I have either been told, received an email, or otherwise ran across the following “fact”: August 2010 has five Sundays, Mondays, and Tuesdays, and this won’t happen again for 823 years! Wow!  That is pretty amazing. It is also completely ridiculous and false.  May, 2011, […]

Become Rich and Famous at INFORMS Online

Well, not rich in the financial sense, but rich in social capital and other rewards. INFORMS is looking for the next editor of INFORMS Online.  I was the founding editor of IOL, with a term from 1995-2000, and it was one of the formative experiences of my life.  I learned a lot about operations research, […]

New Use for Abstracts

For a previous post on data mining, I received the following comment from “liseli bakire”: Abstract The purpose of this article is to investigate some managerial insights related to using the all-unit quantity discount policies under various conditions. The models developed here are general treatments that deal with four major issues: (a) one buyer or […]