More on College Rankings

college rankingsThis article in the New York Times discusses a controversy surrounding a recent ranking of colleges that put Egypt’s University of Alexandria among the top 200 universities in the world.  An informed observer describes the school as “not even the best university in Alexandria“.

http://www.nytimes.com/2010/11/15/education/15iht-educLede15.html

How did this school achieve such a high ranking?  In a subcategory measuring the impact of research, which counted for approximately 33% of the school’s overall score, the University of Alexandria placed fourth in the world, ahead of Harvard and Stanford.  Sound fishy?  Seems as though most of the research citations came from one professor who published 320 articles in a journal he, himself, was in charge of.

Trying to come up with quantitative measures for colleges (or high schools, or teachers) is tricky business.  Not only is it hard to agree on what to measure, but it’s tough to figure out how to measure it.

And once the rating culture sets in, gaming of the system, as seen in this particular case, will inevitably follow.  “Tell me how I will be measured, and I will tell you how I will behave“.  I’m not sure who said this originally, but an engineer friend shared it with me many years ago, and it always comes to mind in these situations.

Hopefully in the future, more schools will follow the example of Reed College and refuse to participate in these rankings.

Metrocard Calculations

metrocard imageThe following article from the New York Times discusses the recent fare increase for public transit in NYC:

http://cityroom.blogs.nytimes.com/2010/10/07/m-t-a-meets-to-increase-transit-fares/

The base fare for a ride on a NYC subway or bus is now $2.25, and price changes have been made both to the monthly unlimited-ride cards and the bulk-purchase bonus rate.

For those of us who live in New York and frequently use public transit, we are faced with the following optimization problem:  is it better to buy the monthly unlimited-use card for $104, or purchase some amount of “single-rides” in bulk and receive a 7% bonus?

The above Times article discusses some of the strategies and factors to consider in making this decision.  In addition, it points the reader to the website www.metrocardbonuscalculator.com that allows the user to experiment with various purchasing scenarios.

Fare hikes have become more commonplace over the past few years, but reliable public transit is still a bargain.  And I’d pay an extra few cents for some additional cleaning crews.

Number Dictionary

numdic 144This is a fun little website that offers information on numbers from 1 to 1000000:

www.numdic.com

For example, I put in one of my favorite numbers, 144, and saw four ways to write 144 as a difference of squares (always a useful little trick)  and five ways to write it as the sum of primes (in case we were trying to verify Goldbach’s conjecture).

I find the Mayan representation of 144 really cool, and the Roman Numeral representation will make this website handy for crossword puzzles!

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