Monday, January 03, 2005

I Have Had It Up To Here with That Damn Yellow or Blue Line!

Will somebody please tell me how it works? I asked Thomas and got nothing. I wasn't surprised though because usually when I ask a fellow, he won't give me a straight answer because he doesn't know but he is afraid that other people will think him a lesser man if he not know how the line works.

The line I am referring to is the line that indicates the first down in football games. On television, it appears on top of the field, but not on top of the players. Please someone tell me how this works!

I will be in the far corner of the building holding my breath awaiting an answer. Thank you.

Best Regards,
Crystal

8 Comments:

Blogger Chris Cope said...

The blue line is the line of scrimmage; the yellow line is the first down. I'll bet you knew that. And I'm sure you know that the line is put in there digitally.

The reason it doesn't run over the players is all thanks to digital technology. The best way to think of digital technology (for the purposes of this explanation) is in terms of old cartoons. If you watch those old cartoons, you'll notice that the background does not move. Effectively, digital technology does this with real life. Because the field (or a wall) does not move, digital technology is able to turn it into a sort of background screen. It does not continuously "transmit" the field, leaving it with more capacity to focus on the stuff that is moving. Because of that, it is then able to put in anything else it wants as the background. The same is often true with the ads you see on walls in baseball games -- those ads aren't really there.

It's all rather terrifying when you think about it (our seeing things that aren't there).

8:36 AM  
Blogger Crystal said...

wow, chris! that is pretty amazing. you have solved my mystery! and i really appreciate it because when i ask that question, a lot of men pshaw at me and act like "oh, she's the girl, asking stupid ignorant questions that everybody already knows the answers to." when in reality, they do not know it themselves. soon enough, i will wow all of them with my new knowledge and gain a whole nother level of respect from them!

but...

now what am i going to wonder about all day?

8:59 AM  
Blogger Chris Cope said...

Wonder about this: Aerodynamically speaking, bumblebees should not be able to fly -- they simply aren't built to do so. Yet, obviously they do fly. Why?

12:07 PM  
Blogger Crystal said...

The old bumblebee myth simply reflects our poor understanding of unsteady viscous fluid dynamics. Unlike fixed-wing aircraft with their steady, almost inviscid (without viscosity) flow dynamics, insects fly in a sea of vortices, surrounded by tiny eddies and whirlwinds that are created when they move their wings.insects depend on vortices to keep them aloft, especially when they are hovering. An important key to solving the mystery of insect flight is the understanding of the vortex "shedding" and how the vortices behave when they separate from the moving surface that created them. Any theory of insect flight has to account for both viscous and inertial effects, and in a fluid environment like air, inertia is a force due to the motion of the fluid itself as fluid particles are carried along by their own velocity. And viscous force has to do with the differences in velocity, or shear, within the fluid.

Gosh, Chris. Everybody knows that.

1:09 PM  
Blogger Thomas said...

The reason I didn't answer is because I am boycotting professional sports until the players aren't a bunch of spoiled babies who push their girlfriends down stairs. And also because I am afraid of giving the wrong answer.

2:45 PM  
Blogger Crystal said...

you could have made something up and i would have believed you. i am quite gullible when it comes to sports and snake spit.

3:24 PM  
Blogger Sir Craig of Highbury said...

I am quite ignorant too Crystal. I follow/play footie aka football or soccer.

An interesting note: I once read a book titled 'The History of Football.' It traced the evolution of the sport from ancient times to soccer>rugby>american football, ausie rules, gaelic, etc.

When you are a librarian you read an enourmous amount.
Sir Craig

2:24 AM  
Anonymous Anonymous said...

Actually, Sir Craig is just an enormous reader to begin with, and then he became a librarian. It's nice to have smart friends.

R.

8:44 AM  

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