math

Amazing Math Tutorial Video Site

http://www.khanacademy.org/

I don’t have much more to say about this. Do you need to learn or brush up on any subject related to math? You will find a wealth of data here in a massive number of videos, each 10 minutes or under. Seriously, anything you want to learn is here, from the basics to advanced calculus. Where does this guy find the time?

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Doing Spy Stuff with Mathematica

I was reading about the IT problems of the recently arrested, alleged Russian spies, and I wondered if they could have managed secret communications better with Mathematica.

One of the claims was that they were using digital steganography tools that kept crashing. I wanted to see how quickly I could implement digital image steganography in Mathematica using a method known as “least significant bit insertion”.

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6.0 * 10^-49 percent. scientific notation was invented after a good many years of zeros. t-rex is assuming a 6000kg t-rex body here, so your percentage is even smaller (um, PROBABLY???)

Calculate distance and bearing between two Latitude/Longitude points using Haversine formula in JavaScript

Notification Strategies for Social Networks

You’ve built a social application and launched a new feature. The number of notifications you can send out is constrained. Which set of users should you notify to guarantee the most people start using this new feature?

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Wolfram|Alpha

All of the worlds knowledge, in one easy computable interface

Wolfram Blog : The Incredible Convenience of Mathematica Image Processing

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