Jan 6 2012

Downloading automatically from sites with CAPTCHA

Have you ever wanted to download something from Megaupload, Wupload or any other Rapidshare like services but got annoyed because there are too many files you need to download, and of course you can’t download them simultaneously because the server blocks it, and even worse, there is a CAPTCHA before every download!

Last night, I had the same problem. I had to download few files from Wupload (around 10 files). I knew about JDownloader, which is pretty cool, open-source, cross-platform, download manager that knows how to handle most sites. JDownloader, even knows how to handle some of the simple CAPTCHA automatically, but it has no chance vs. strong ones such as reCAPTCHA.

So I’ve started searching the web, and then I’ve found CaptchaTrader. CaptchaTrader is a service that sends your CAPTCHA to other users in exchange of credit points. Each CAPTCHA cost the user 10 credits. In order to earn credits, you can buy them or you can just solve others CAPTCHAs and earn 7 point for every good solution.

And last but not least, CaptchaTrader has a JDownloader plugin that will solve all the “unsolvable” CAPTCHA automatically when needed. Just go to the download section.

Needless to say, I woke up this morning, and all the files were there, just waiting for me.

PS:┬áIf you want, you can even CASH-OUT the credits, every 100 credits equals 2 cents. I don’t think it’s the best way to earn money… but if you are bored…

Jan 3 2012

Snow White

Surely not this ugly girl...

For those of you who doesn’t know Linear Algebra (yet…), the matrix on the blackboard is a reflection matrix, when multiplying with a \mathbb R^{2} vector, the matrix will change the sign of the x coordinate, therefor it will create a reflected image of the vector.

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Jan 2 2012

Q wants to break free!

God knows got to make it on my own. So baby can't you see, I've got to break free.

Today in Algebraic structures class we’ve learned about free groups. And learned that \mathbb Q (the rationals) is not a free group…