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The sub-title claims 80% efficiency. Where did they get that from? 80% is close to the theoretical maximum, so I think the figure is misleading and can discredit Arstechnica and more importantly an otherwise admirable endeavor.

It's starting to pick up, though it's supposed to be illegal when done by foreigners. Check out http://www.producthunt.com/tech/meetngreetme

There are powerful tools out there that can do this type of computation and more in a breeze. I have personally worked on SaturnAPI [0], which is a RESTful API for Matlab/Octave. You can build your own APIs to do almost any calculation imaginable. If anyone needs to solve equations, definitely give it a shot. You can solve all sorts of equations, linear and non-linear [1].

[0] https://saturnapi.com/

[1] http://www.mathworks.com/help/symbolic/equation-solving.html

How will you make money from this?

I'm currently in Bangkok and wanted to add that if you keep on the low and spend your money here there are no problems. It sucks as soon as you try to speak up, buy property, make money from this place, or do anything where the rule of law is important. You will miss the rule of law, i.e. republic, of well-established nations.

Hi, thanks for sharing. I'm in Thailand where tourism is a big thing. Have you considered personalized amateur tour guides?