Thursday, September 30, 2010

The Tyranny of E-Mail

Just read The Tyranny of E-mail: The Four-Thousand-Year Journey to Your Inbox by John Freeman (Scribner, 2009).

I have to say I wasn't overly impressed.  While I agree with much of what the author writes, I found the book simplistic and many of the points made are obvious (at least to someone who used email before most people had ever heard of it).  This book could have been written (much shorter) as an article in a magazine.

After initial observations on the explosive growth of email, Freeman launches into a rather superficial history of communication from clay tablets to early mail to the growth of the modern postal system.  He discusses the lost art of letter writing and the picture postcard craze of the 19th and 20th centuries.  Telegraphs and typewriters lead into an introduction of the origin and growth of the Internet and email.

Quite honestly, I've read deeper, less superficial, discussions of these topics on Wikipedia.

The book wraps up with lots of anecdotes (and no references to actual studies) of how some people are apparently addicted to email and how computers and electronic gadgets take up more and more of our lives.  As someone who's a heavy user of computers, maybe I have a problem too, but I would remind people that I'm sitting here writing this in my living room on a weeknight at 8:30 pm with the television turned off.  I think many more people are addicted to television than computers or email.

While I do know people who are addicted to their "Crackberries" checking work email on Friday evenings during happy hour in the bar, I also know plenty of other people who set limits on when and where they'll check their email (especially important as a professor - students will sometimes email you at 2 am on a Saturday night and get annoyed you don't answer until 9 am Monday morning!).

Bottom line, summarizing the entire book, is we all need to slow down and not let email and the Internet take over our lives.  There, I just saved you a few hours of reading - go out and smell the roses with that saved time (or check your inbox - whatever).

Wednesday, September 29, 2010

We're # 48 rah rah!



What more can I say?  Fucking pathetic.

Another gem from the article: 49% of U.S. adults don't know how long it takes for the Earth to circle the sun.

Half the country are ignorant morons.


I don' need nun
yur fancy book-larnin'

Tuesday, September 28, 2010

Fibonacci rectangles and spirals

Make sure you read my Introduction to Fibonacci Numbers post before you read this...

Follow along with the diagram below.

Take a square with a side of 1 unit.

Add another square to the side (1 unit) of the original square.  Now you have a 2 x 1 rectangle.

Add another square to the larger (2 unit) side of this rectangle.  Now you have a 3 x 2 rectangle.

Add another square to the larger (3 unit) side of this rectangle.  Now you have a 5 x 3 rectangle.

Add another square to the larger (5 unit) side of this rectangle. Now you have an 8 x 5 rectangle.

Add another square to the larger (8 unit) side of this rectangle. Now you have a 13 x 8 rectangle.


As you can see, you can continue this indefinitely.  You've probably already noticed that the sides of the rectangles are succesive numbers from the Fibonacci sequence (1, 1, 2, 3, 5, 8, and 13 but future additions would yield 21, 34, 55, 89, etc.)

In my last post introducing the Fibonacci numbers, I mentioned that dividing successive Fibonacci numbers (Fn / Fn-1) approaches a constant (the higher the Fibonacci numbers, the more decimal place accuracy obtained for this constant).  The constant is called Phi (F).  The ratio of the two sides of these larger and larger rectangles similarly approach F which is why they are called Fibonacci rectangles.

Now, let's get interesting.  For each square that you've added, draw a 1/4 circular arc from corner to corner with the radius of the arc equal to the side of the square.  Continue in a clockwise direction from square to square and you'll find yourself drawing a nice spiral (here's an animation).


This is called a Fibonacci spiral for obvious reasons (technically, it approximates a Fibonacci spiral since these rectangle ratios approximate F).  There are objects in nature that look very much like Fibonacci spirals such as the chambered nautilus (Nautilus pompilius) shown below (sawn in half).


Here's a nice spiral galaxy (M74).


We see these types of curves in nature when an object's growth is proportional to its size.

Monday, September 27, 2010

I love this!

It's a parody of how science journalism works:

This is a news website article about a scientific paper

I love it!  About as much as I despise most of what passes for science journalism in the mass media.