Very Useful Website

I found a website I think will be helpful for this class. It is simple but I think it helps portray some very important concepts.

http://tiny.cc/IHE5n

Excellent work Mark Straccia, you are truly a hero.

Yay, we'll all ace this class now!

Wow. That's some inspiring stuff.

Thanks.

@Mark

/ban

thanks alot. It refreshed my brain

bookmarked. would visit again.

Thanks! That's really helpful : ]

How do YouTube videos become popular? I was thinking this the other day after having watched "I'm on a boat" for the first time. The popularity of the videos on YouTube can be modeled similarly to the question "How many people infected after d days?" from Math Corner. As a person who doesn't spend much time on YouTube, I have only really watched videos that people have recommended to me. Videos become popular, or at least have a high view count, when people share the video in a social network. Videos are spread through paths from node to node, a node being a person or a video on Youtube (videos are also linked to other videos via "related videos"). The larger number of paths therefore result in a higher popularity. We can view this situation as being similar to the question presented in Math Corner shortly after the posting of the video on YouTube; one person posts the video and then tells x number of friends about it. Those friends will tell another x number of friends, and this continues. The differences lie in that people will not be sharing this video to the same number of people and that videos can be watched multiple times by the same person.