3.1.3 Can you answer these questions?

3.1.3.1 How can I import from a usb webcam on the raspberry pi?

http://mathematica.stackexchange.com/questions/103364/how-can-i-import-from-a-usb-webcam-on-the-raspberry-pi

 
I'm trying to set up a raspberry pi as a webcam server and I need to import images into a mathematica notebook on the raspberry pi. I tried using CurrentImage[] just to test it but I got an error just  ...
 

- asked by Tobias Nash 2votes

3.1.3.2 How to change default font for all existing notebooks at once?

http://mathematica.stackexchange.com/questions/103053/how-to-change-default-font-for-all-existing-notebooks-at-once

 
By default, Mathematica 9 and 10 use Gill Sans MT fonts for headings of title/subtitle/section/subsection/subsubsection. Unfortunately, Gill Sans MT fonts have no Cyrillic letters, so that all  ...
 

- asked by Igor Kotelnikov 5votes

3.1.3.3 VERY slow to solve a nonlinear equation involving matrix eigenvalues

http://mathematica.stackexchange.com/questions/103282/very-slow-to-solve-a-nonlinear-equation-involving-matrix-eigenvalues

 
I am trying to solve a problem similar to the following: 
 
f[k_, a_] := ( 
Matrix = {{0.05, (a*k)^2}, {(a*k)^2, -0.05}}; 
 
{eps, psi} = Eigensystem[Matrix]; 
 
{eps,psi} = {eps[[#]], psi[[#]]} &@ 
...
 

- asked by Xiao 2votes

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