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20th Conference of the International Federation of Operational Research Societies (IFORS)


Call for Papers


Conference organizers invite you to participate in the IFORS 2014 Conference (www.IFORS2014.com) and to submit an abstract. The IFORS 2014 Triennial Conference will be held in Barcelona, Spain, July 13-18, 2014. It will bring operational researchers from around the globe together.


Submit abstracts at: http://ifors2014.upc.edu/abstract


The Program Committee is preparing a high-quality and attractive scientific program. There are already nearly 200 streams distributed in 25 areas. Find the most appropriate stream for your presentations at: http://ifors2014.upc.edu/abstract


All attendees, including speakers and session chairs, must register and pay the registration fee. These fees have been announced at €500 for early bird (until Feb. 28) and €300 for students.
Register now at http://ifors2014.com/registration
Find more at www.IFORS2014.com


Important dates
Abstract submission deadline: Jan. 31, 2014
Notification of acceptance: Feb. 25, 2014
Early Registration: Ends Feb. 28, 2014
Regular Registration: March 1 - April 30, 2014
Late and on-site registration: May 1 - July 13, 2014


Best host

By John Toczek

Hosting a dinner party requires several skills to pull off a successful evening. One of your duties, aside from preparing dinner and selecting the drinks, is to make sure your guests enjoy themselves.

Figure 1 shows a dinner table with six seats for your guests. Some guests, however, do not get along with each other. If two guests who do not get along are seated next to each other, it will create conflict at dinner. As host, you must arrange the guests in a seating order that minimizes conflict.

Andrew will only sit next to Dave and Frank; Betty will only sit next to Cara and Erica; Cara will only sit next to Betty and Frank; Dave will only sit next to Andrew and Erica; Erica will only sit next to Betty and Dave; Frank will only sit next to Andrew and Cara. In the example seating arrangement above, there are three conflicts (Andrew and Betty, Cara and Dave, Erica and Frank).


Figure 1: How can these six guests get along?


What seating arrangement will minimize the conflict at dinner?

Send your answer to puzzlor@gmail.com by April 15. The winner, chosen randomly from correct answers, will receive an “O.R. The Science of Better” T-shirt. Congratulations to Dan Cullen for correctly solving October’s Home Improvement PuzzlOR. Past questions can be found at puzzlor.com.

John Toczek is the senior decision support analyst for ARAMARK Corporation in the Global Risk Management group. He earned a bachelor’s degree in chemical engineering at Drexel University (1996) and a master’s degree in operations research from Virginia Commonwealth University (2005).