Nice material, but it is difficult to read, because of run-on sentences, and grammar errors. I would suggest that you hire an editor to make sure your grammar and sentence construction are correct. Sorry to be critical. It's an occupational hazard, because I'm a technical writer for a living, writing computer books. My belief is that if you are going to post material on the Web for all the world to see, you really should do your best to make sure it is well written. If you don't, people won't come back to your site. Engineers are typically poor writers, unfortunately, but that is why I have been able to make a living writing computer books. The manuals that come with products are notoriously poorly written.
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