I have been studying engineering for over 6 years. So I figured to use my engineering knowledge along side my website knowledge. I plan to create a series of sites explaining different engineering concepts and putting examples online.

The first example of such sites is Nyquist Plots. It explains what nyquist plots are, how to draw them by hand and by MATLAB. It also solves a sample problem to better explain the topic. 

The main advantage of such a site is that it is very specific and therefore easy to rank for on Google. I am hoping with maintaining active commenting I can improve the site and perhaps even attract .edu links.

The site can be monetized in couple ways:

1. Adsense: I don’t think that Adsense would generated much traffic. Majority of the visitors to the sites will be students and professional people which are usually Adsense immune.
2. Sample Problems Bundle: I will write and solve 10 to 20 examples and put it in a PDF file bundle. While the information on the site will be free, the PDF example bundle can be purchased for $5 for an immediate delivery.
3. Specific Problems: I will also offer to solve specific problems that users might have at $20/problem. 

This can be generalized to many other topics. I have chosen Electrical Engineering concepts because that is what I am studying.

Drawing Root Locus plots by hand is a hard and time consuming task so it is always good to check the answers with Matlab just to be sure you are on the right track.

The process of drawing the Root Locus with Matlab is as follow:

1. Define the numerator (num).
2. Define the denominator (den).
3. Draw the Root Locus (rlocus (num, den))

So let’s say we want to draw the root locus for the following system:

G(s) = k / ( s )*( s^2 + 4s + 8 )

The Matlab code will be:

1. num = [1];
2. den = conv ([1 0] , [1 4 8]);
3. rlocus (num, den)